mirror of
https://github.com/moparisthebest/wget
synced 2024-07-03 16:38:41 -04:00
2e86829809
* hash.h (hash_table_put): Make argument "value" const. * hash.c (hash_table_put): Make argument value const. Cast `value' to void. * http.c (request_set_header): Make argument `name' const. Cast `value' and `name' to void*. (request_remove_header): Make argument `name' const. * url.c (url_file_name): Make `index_filename' static. * warc.h (warc_write_cdx_record): Make `url', `timestamp', `mime_type', `payload_digest', `redirect_location', `warc_filename', response_uuid' arguments const. Make `checksum' const. * warc.c (warc_write_date_header): Make the `timestamp' argument const. Make `extension' const. (warc_write_cdx_record): Make `url', `timestamp', `mime_type', `payload_digest', `redirect_location', `warc_filename', response_uuid' arguments const. Make `checksum' const.
3924 lines
126 KiB
C
3924 lines
126 KiB
C
/* HTTP support.
|
||
Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software Foundation,
|
||
Inc.
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||
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||
This file is part of GNU Wget.
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||
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||
GNU Wget is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
GNU Wget is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with Wget. If not, see <http://www.gnu.org/licenses/>.
|
||
|
||
Additional permission under GNU GPL version 3 section 7
|
||
|
||
If you modify this program, or any covered work, by linking or
|
||
combining it with the OpenSSL project's OpenSSL library (or a
|
||
modified version of that library), containing parts covered by the
|
||
terms of the OpenSSL or SSLeay licenses, the Free Software Foundation
|
||
grants you additional permission to convey the resulting work.
|
||
Corresponding Source for a non-source form of such a combination
|
||
shall include the source code for the parts of OpenSSL used as well
|
||
as that of the covered work. */
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||
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||
#include "wget.h"
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||
|
||
#include <stdio.h>
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||
#include <stdlib.h>
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||
#include <string.h>
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||
#include <unistd.h>
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#include <assert.h>
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||
#include <errno.h>
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||
#include <time.h>
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||
#include <locale.h>
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||
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||
#include "hash.h"
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#include "http.h"
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||
#include "utils.h"
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||
#include "url.h"
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||
#include "host.h"
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||
#include "retr.h"
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||
#include "connect.h"
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||
#include "netrc.h"
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||
#ifdef HAVE_SSL
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||
# include "ssl.h"
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||
#endif
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||
#ifdef ENABLE_NTLM
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||
# include "http-ntlm.h"
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||
#endif
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||
#include "cookies.h"
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||
#include "md5.h"
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||
#include "convert.h"
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||
#include "spider.h"
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||
#include "warc.h"
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||
|
||
#ifdef TESTING
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||
#include "test.h"
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||
#endif
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||
|
||
#ifdef __VMS
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||
# include "vms.h"
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||
#endif /* def __VMS */
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||
|
||
extern char *version_string;
|
||
|
||
/* Forward decls. */
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||
struct http_stat;
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||
static char *create_authorization_line (const char *, const char *,
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const char *, const char *,
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const char *, bool *);
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static char *basic_authentication_encode (const char *, const char *);
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||
static bool known_authentication_scheme_p (const char *, const char *);
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||
static void ensure_extension (struct http_stat *, const char *, int *);
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||
static void load_cookies (void);
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||
|
||
#ifndef MIN
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# define MIN(x, y) ((x) > (y) ? (y) : (x))
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||
#endif
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||
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||
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||
static bool cookies_loaded_p;
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||
static struct cookie_jar *wget_cookie_jar;
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||
|
||
#define TEXTHTML_S "text/html"
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||
#define TEXTXHTML_S "application/xhtml+xml"
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||
#define TEXTCSS_S "text/css"
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||
|
||
/* Some status code validation macros: */
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||
#define H_10X(x) (((x) >= 100) && ((x) < 200))
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||
#define H_20X(x) (((x) >= 200) && ((x) < 300))
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||
#define H_PARTIAL(x) ((x) == HTTP_STATUS_PARTIAL_CONTENTS)
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||
#define H_REDIRECTED(x) ((x) == HTTP_STATUS_MOVED_PERMANENTLY \
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|| (x) == HTTP_STATUS_MOVED_TEMPORARILY \
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||
|| (x) == HTTP_STATUS_SEE_OTHER \
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||
|| (x) == HTTP_STATUS_TEMPORARY_REDIRECT)
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||
|
||
/* HTTP/1.0 status codes from RFC1945, provided for reference. */
|
||
/* Successful 2xx. */
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||
#define HTTP_STATUS_OK 200
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||
#define HTTP_STATUS_CREATED 201
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||
#define HTTP_STATUS_ACCEPTED 202
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||
#define HTTP_STATUS_NO_CONTENT 204
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||
#define HTTP_STATUS_PARTIAL_CONTENTS 206
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||
|
||
/* Redirection 3xx. */
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||
#define HTTP_STATUS_MULTIPLE_CHOICES 300
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||
#define HTTP_STATUS_MOVED_PERMANENTLY 301
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||
#define HTTP_STATUS_MOVED_TEMPORARILY 302
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||
#define HTTP_STATUS_SEE_OTHER 303 /* from HTTP/1.1 */
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||
#define HTTP_STATUS_NOT_MODIFIED 304
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||
#define HTTP_STATUS_TEMPORARY_REDIRECT 307 /* from HTTP/1.1 */
|
||
|
||
/* Client error 4xx. */
|
||
#define HTTP_STATUS_BAD_REQUEST 400
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||
#define HTTP_STATUS_UNAUTHORIZED 401
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||
#define HTTP_STATUS_FORBIDDEN 403
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||
#define HTTP_STATUS_NOT_FOUND 404
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||
#define HTTP_STATUS_RANGE_NOT_SATISFIABLE 416
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||
|
||
/* Server errors 5xx. */
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||
#define HTTP_STATUS_INTERNAL 500
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||
#define HTTP_STATUS_NOT_IMPLEMENTED 501
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||
#define HTTP_STATUS_BAD_GATEWAY 502
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||
#define HTTP_STATUS_UNAVAILABLE 503
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||
|
||
enum rp {
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||
rel_none, rel_name, rel_value, rel_both
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||
};
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||
|
||
struct request {
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||
const char *method;
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||
char *arg;
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||
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||
struct request_header {
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||
char *name, *value;
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||
enum rp release_policy;
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||
} *headers;
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||
int hcount, hcapacity;
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||
};
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||
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||
extern int numurls;
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||
|
||
/* Create a new, empty request. At least request_set_method must be
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called before the request can be used. */
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static struct request *
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request_new (void)
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||
{
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struct request *req = xnew0 (struct request);
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req->hcapacity = 8;
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||
req->headers = xnew_array (struct request_header, req->hcapacity);
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return req;
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||
}
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||
/* Set the request's method and its arguments. METH should be a
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literal string (or it should outlive the request) because it will
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not be freed. ARG will be freed by request_free. */
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||
static void
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||
request_set_method (struct request *req, const char *meth, char *arg)
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||
{
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req->method = meth;
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||
req->arg = arg;
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||
}
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||
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||
/* Return the method string passed with the last call to
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request_set_method. */
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||
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||
static const char *
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||
request_method (const struct request *req)
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||
{
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return req->method;
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||
}
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||
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||
/* Free one header according to the release policy specified with
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request_set_header. */
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||
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||
static void
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release_header (struct request_header *hdr)
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{
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switch (hdr->release_policy)
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{
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case rel_none:
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break;
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case rel_name:
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xfree (hdr->name);
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||
break;
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case rel_value:
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||
xfree (hdr->value);
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||
break;
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||
case rel_both:
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||
xfree (hdr->name);
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||
xfree (hdr->value);
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||
break;
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||
}
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||
}
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/* Set the request named NAME to VALUE. Specifically, this means that
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a "NAME: VALUE\r\n" header line will be used in the request. If a
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header with the same name previously existed in the request, its
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value will be replaced by this one. A NULL value means do nothing.
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RELEASE_POLICY determines whether NAME and VALUE should be released
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(freed) with request_free. Allowed values are:
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||
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||
- rel_none - don't free NAME or VALUE
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- rel_name - free NAME when done
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- rel_value - free VALUE when done
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- rel_both - free both NAME and VALUE when done
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||
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Setting release policy is useful when arguments come from different
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sources. For example:
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||
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// Don't free literal strings!
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request_set_header (req, "Pragma", "no-cache", rel_none);
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// Don't free a global variable, we'll need it later.
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request_set_header (req, "Referer", opt.referer, rel_none);
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// Value freshly allocated, free it when done.
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request_set_header (req, "Range",
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aprintf ("bytes=%s-", number_to_static_string (hs->restval)),
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rel_value);
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*/
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||
static void
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request_set_header (struct request *req, const char *name, const char *value,
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enum rp release_policy)
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{
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struct request_header *hdr;
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int i;
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if (!value)
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{
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/* A NULL value is a no-op; if freeing the name is requested,
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free it now to avoid leaks. */
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if (release_policy == rel_name || release_policy == rel_both)
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xfree ((void *)name);
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return;
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}
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for (i = 0; i < req->hcount; i++)
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||
{
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hdr = &req->headers[i];
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||
if (0 == strcasecmp (name, hdr->name))
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{
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/* Replace existing header. */
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release_header (hdr);
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hdr->name = (void *)name;
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hdr->value = (void *)value;
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hdr->release_policy = release_policy;
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return;
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}
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}
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/* Install new header. */
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||
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||
if (req->hcount >= req->hcapacity)
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{
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req->hcapacity <<= 1;
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req->headers = xrealloc (req->headers, req->hcapacity * sizeof (*hdr));
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}
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hdr = &req->headers[req->hcount++];
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hdr->name = (void *)name;
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hdr->value = (void *)value;
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hdr->release_policy = release_policy;
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}
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/* Like request_set_header, but sets the whole header line, as
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provided by the user using the `--header' option. For example,
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request_set_user_header (req, "Foo: bar") works just like
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request_set_header (req, "Foo", "bar"). */
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static void
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request_set_user_header (struct request *req, const char *header)
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{
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char *name;
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const char *p = strchr (header, ':');
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||
if (!p)
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return;
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BOUNDED_TO_ALLOCA (header, p, name);
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++p;
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while (c_isspace (*p))
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++p;
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request_set_header (req, xstrdup (name), (char *) p, rel_name);
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}
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/* Remove the header with specified name from REQ. Returns true if
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the header was actually removed, false otherwise. */
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static bool
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request_remove_header (struct request *req, const char *name)
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{
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int i;
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for (i = 0; i < req->hcount; i++)
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{
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struct request_header *hdr = &req->headers[i];
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if (0 == strcasecmp (name, hdr->name))
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{
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release_header (hdr);
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/* Move the remaining headers by one. */
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if (i < req->hcount - 1)
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memmove (hdr, hdr + 1, (req->hcount - i - 1) * sizeof (*hdr));
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--req->hcount;
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return true;
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}
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}
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return false;
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}
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#define APPEND(p, str) do { \
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int A_len = strlen (str); \
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memcpy (p, str, A_len); \
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p += A_len; \
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} while (0)
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/* Construct the request and write it to FD using fd_write.
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If warc_tmp is set to a file pointer, the request string will
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also be written to that file. */
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static int
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request_send (const struct request *req, int fd, FILE *warc_tmp)
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{
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char *request_string, *p;
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int i, size, write_error;
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/* Count the request size. */
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size = 0;
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/* METHOD " " ARG " " "HTTP/1.0" "\r\n" */
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size += strlen (req->method) + 1 + strlen (req->arg) + 1 + 8 + 2;
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for (i = 0; i < req->hcount; i++)
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{
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struct request_header *hdr = &req->headers[i];
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/* NAME ": " VALUE "\r\n" */
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size += strlen (hdr->name) + 2 + strlen (hdr->value) + 2;
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}
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/* "\r\n\0" */
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size += 3;
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p = request_string = alloca_array (char, size);
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/* Generate the request. */
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APPEND (p, req->method); *p++ = ' ';
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APPEND (p, req->arg); *p++ = ' ';
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memcpy (p, "HTTP/1.1\r\n", 10); p += 10;
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for (i = 0; i < req->hcount; i++)
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{
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struct request_header *hdr = &req->headers[i];
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APPEND (p, hdr->name);
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*p++ = ':', *p++ = ' ';
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APPEND (p, hdr->value);
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*p++ = '\r', *p++ = '\n';
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}
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*p++ = '\r', *p++ = '\n', *p++ = '\0';
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assert (p - request_string == size);
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#undef APPEND
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DEBUGP (("\n---request begin---\n%s---request end---\n", request_string));
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/* Send the request to the server. */
|
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write_error = fd_write (fd, request_string, size - 1, -1);
|
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if (write_error < 0)
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logprintf (LOG_VERBOSE, _("Failed writing HTTP request: %s.\n"),
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fd_errstr (fd));
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else if (warc_tmp != NULL)
|
||
{
|
||
/* Write a copy of the data to the WARC record. */
|
||
int warc_tmp_written = fwrite (request_string, 1, size - 1, warc_tmp);
|
||
if (warc_tmp_written != size - 1)
|
||
return -2;
|
||
}
|
||
return write_error;
|
||
}
|
||
|
||
/* Release the resources used by REQ. */
|
||
|
||
static void
|
||
request_free (struct request *req)
|
||
{
|
||
int i;
|
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xfree_null (req->arg);
|
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for (i = 0; i < req->hcount; i++)
|
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release_header (&req->headers[i]);
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xfree_null (req->headers);
|
||
xfree (req);
|
||
}
|
||
|
||
static struct hash_table *basic_authed_hosts;
|
||
|
||
/* Find out if this host has issued a Basic challenge yet; if so, give
|
||
* it the username, password. A temporary measure until we can get
|
||
* proper authentication in place. */
|
||
|
||
static bool
|
||
maybe_send_basic_creds (const char *hostname, const char *user,
|
||
const char *passwd, struct request *req)
|
||
{
|
||
bool do_challenge = false;
|
||
|
||
if (opt.auth_without_challenge)
|
||
{
|
||
DEBUGP (("Auth-without-challenge set, sending Basic credentials.\n"));
|
||
do_challenge = true;
|
||
}
|
||
else if (basic_authed_hosts
|
||
&& hash_table_contains(basic_authed_hosts, hostname))
|
||
{
|
||
DEBUGP (("Found %s in basic_authed_hosts.\n", quote (hostname)));
|
||
do_challenge = true;
|
||
}
|
||
else
|
||
{
|
||
DEBUGP (("Host %s has not issued a general basic challenge.\n",
|
||
quote (hostname)));
|
||
}
|
||
if (do_challenge)
|
||
{
|
||
request_set_header (req, "Authorization",
|
||
basic_authentication_encode (user, passwd),
|
||
rel_value);
|
||
}
|
||
return do_challenge;
|
||
}
|
||
|
||
static void
|
||
register_basic_auth_host (const char *hostname)
|
||
{
|
||
if (!basic_authed_hosts)
|
||
{
|
||
basic_authed_hosts = make_nocase_string_hash_table (1);
|
||
}
|
||
if (!hash_table_contains(basic_authed_hosts, hostname))
|
||
{
|
||
hash_table_put (basic_authed_hosts, xstrdup(hostname), NULL);
|
||
DEBUGP (("Inserted %s into basic_authed_hosts\n", quote (hostname)));
|
||
}
|
||
}
|
||
|
||
|
||
/* Send the contents of FILE_NAME to SOCK. Make sure that exactly
|
||
PROMISED_SIZE bytes are sent over the wire -- if the file is
|
||
longer, read only that much; if the file is shorter, report an error.
|
||
If warc_tmp is set to a file pointer, the post data will
|
||
also be written to that file. */
|
||
|
||
static int
|
||
post_file (int sock, const char *file_name, wgint promised_size, FILE *warc_tmp)
|
||
{
|
||
static char chunk[8192];
|
||
wgint written = 0;
|
||
int write_error;
|
||
FILE *fp;
|
||
|
||
DEBUGP (("[writing POST file %s ... ", file_name));
|
||
|
||
fp = fopen (file_name, "rb");
|
||
if (!fp)
|
||
return -1;
|
||
while (!feof (fp) && written < promised_size)
|
||
{
|
||
int towrite;
|
||
int length = fread (chunk, 1, sizeof (chunk), fp);
|
||
if (length == 0)
|
||
break;
|
||
towrite = MIN (promised_size - written, length);
|
||
write_error = fd_write (sock, chunk, towrite, -1);
|
||
if (write_error < 0)
|
||
{
|
||
fclose (fp);
|
||
return -1;
|
||
}
|
||
if (warc_tmp != NULL)
|
||
{
|
||
/* Write a copy of the data to the WARC record. */
|
||
int warc_tmp_written = fwrite (chunk, 1, towrite, warc_tmp);
|
||
if (warc_tmp_written != towrite)
|
||
{
|
||
fclose (fp);
|
||
return -2;
|
||
}
|
||
}
|
||
written += towrite;
|
||
}
|
||
fclose (fp);
|
||
|
||
/* If we've written less than was promised, report a (probably
|
||
nonsensical) error rather than break the promise. */
|
||
if (written < promised_size)
|
||
{
|
||
errno = EINVAL;
|
||
return -1;
|
||
}
|
||
|
||
assert (written == promised_size);
|
||
DEBUGP (("done]\n"));
|
||
return 0;
|
||
}
|
||
|
||
/* Determine whether [START, PEEKED + PEEKLEN) contains an empty line.
|
||
If so, return the pointer to the position after the line, otherwise
|
||
return NULL. This is used as callback to fd_read_hunk. The data
|
||
between START and PEEKED has been read and cannot be "unread"; the
|
||
data after PEEKED has only been peeked. */
|
||
|
||
static const char *
|
||
response_head_terminator (const char *start, const char *peeked, int peeklen)
|
||
{
|
||
const char *p, *end;
|
||
|
||
/* If at first peek, verify whether HUNK starts with "HTTP". If
|
||
not, this is a HTTP/0.9 request and we must bail out without
|
||
reading anything. */
|
||
if (start == peeked && 0 != memcmp (start, "HTTP", MIN (peeklen, 4)))
|
||
return start;
|
||
|
||
/* Look for "\n[\r]\n", and return the following position if found.
|
||
Start two chars before the current to cover the possibility that
|
||
part of the terminator (e.g. "\n\r") arrived in the previous
|
||
batch. */
|
||
p = peeked - start < 2 ? start : peeked - 2;
|
||
end = peeked + peeklen;
|
||
|
||
/* Check for \n\r\n or \n\n anywhere in [p, end-2). */
|
||
for (; p < end - 2; p++)
|
||
if (*p == '\n')
|
||
{
|
||
if (p[1] == '\r' && p[2] == '\n')
|
||
return p + 3;
|
||
else if (p[1] == '\n')
|
||
return p + 2;
|
||
}
|
||
/* p==end-2: check for \n\n directly preceding END. */
|
||
if (p[0] == '\n' && p[1] == '\n')
|
||
return p + 2;
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* The maximum size of a single HTTP response we care to read. Rather
|
||
than being a limit of the reader implementation, this limit
|
||
prevents Wget from slurping all available memory upon encountering
|
||
malicious or buggy server output, thus protecting the user. Define
|
||
it to 0 to remove the limit. */
|
||
|
||
#define HTTP_RESPONSE_MAX_SIZE 65536
|
||
|
||
/* Read the HTTP request head from FD and return it. The error
|
||
conditions are the same as with fd_read_hunk.
|
||
|
||
To support HTTP/0.9 responses, this function tries to make sure
|
||
that the data begins with "HTTP". If this is not the case, no data
|
||
is read and an empty request is returned, so that the remaining
|
||
data can be treated as body. */
|
||
|
||
static char *
|
||
read_http_response_head (int fd)
|
||
{
|
||
return fd_read_hunk (fd, response_head_terminator, 512,
|
||
HTTP_RESPONSE_MAX_SIZE);
|
||
}
|
||
|
||
struct response {
|
||
/* The response data. */
|
||
const char *data;
|
||
|
||
/* The array of pointers that indicate where each header starts.
|
||
For example, given this HTTP response:
|
||
|
||
HTTP/1.0 200 Ok
|
||
Description: some
|
||
text
|
||
Etag: x
|
||
|
||
The headers are located like this:
|
||
|
||
"HTTP/1.0 200 Ok\r\nDescription: some\r\n text\r\nEtag: x\r\n\r\n"
|
||
^ ^ ^ ^
|
||
headers[0] headers[1] headers[2] headers[3]
|
||
|
||
I.e. headers[0] points to the beginning of the request,
|
||
headers[1] points to the end of the first header and the
|
||
beginning of the second one, etc. */
|
||
|
||
const char **headers;
|
||
};
|
||
|
||
/* Create a new response object from the text of the HTTP response,
|
||
available in HEAD. That text is automatically split into
|
||
constituent header lines for fast retrieval using
|
||
resp_header_*. */
|
||
|
||
static struct response *
|
||
resp_new (const char *head)
|
||
{
|
||
const char *hdr;
|
||
int count, size;
|
||
|
||
struct response *resp = xnew0 (struct response);
|
||
resp->data = head;
|
||
|
||
if (*head == '\0')
|
||
{
|
||
/* Empty head means that we're dealing with a headerless
|
||
(HTTP/0.9) response. In that case, don't set HEADERS at
|
||
all. */
|
||
return resp;
|
||
}
|
||
|
||
/* Split HEAD into header lines, so that resp_header_* functions
|
||
don't need to do this over and over again. */
|
||
|
||
size = count = 0;
|
||
hdr = head;
|
||
while (1)
|
||
{
|
||
DO_REALLOC (resp->headers, size, count + 1, const char *);
|
||
resp->headers[count++] = hdr;
|
||
|
||
/* Break upon encountering an empty line. */
|
||
if (!hdr[0] || (hdr[0] == '\r' && hdr[1] == '\n') || hdr[0] == '\n')
|
||
break;
|
||
|
||
/* Find the end of HDR, including continuations. */
|
||
do
|
||
{
|
||
const char *end = strchr (hdr, '\n');
|
||
if (end)
|
||
hdr = end + 1;
|
||
else
|
||
hdr += strlen (hdr);
|
||
}
|
||
while (*hdr == ' ' || *hdr == '\t');
|
||
}
|
||
DO_REALLOC (resp->headers, size, count + 1, const char *);
|
||
resp->headers[count] = NULL;
|
||
|
||
return resp;
|
||
}
|
||
|
||
/* Locate the header named NAME in the request data, starting with
|
||
position START. This allows the code to loop through the request
|
||
data, filtering for all requests of a given name. Returns the
|
||
found position, or -1 for failure. The code that uses this
|
||
function typically looks like this:
|
||
|
||
for (pos = 0; (pos = resp_header_locate (...)) != -1; pos++)
|
||
... do something with header ...
|
||
|
||
If you only care about one header, use resp_header_get instead of
|
||
this function. */
|
||
|
||
static int
|
||
resp_header_locate (const struct response *resp, const char *name, int start,
|
||
const char **begptr, const char **endptr)
|
||
{
|
||
int i;
|
||
const char **headers = resp->headers;
|
||
int name_len;
|
||
|
||
if (!headers || !headers[1])
|
||
return -1;
|
||
|
||
name_len = strlen (name);
|
||
if (start > 0)
|
||
i = start;
|
||
else
|
||
i = 1;
|
||
|
||
for (; headers[i + 1]; i++)
|
||
{
|
||
const char *b = headers[i];
|
||
const char *e = headers[i + 1];
|
||
if (e - b > name_len
|
||
&& b[name_len] == ':'
|
||
&& 0 == strncasecmp (b, name, name_len))
|
||
{
|
||
b += name_len + 1;
|
||
while (b < e && c_isspace (*b))
|
||
++b;
|
||
while (b < e && c_isspace (e[-1]))
|
||
--e;
|
||
*begptr = b;
|
||
*endptr = e;
|
||
return i;
|
||
}
|
||
}
|
||
return -1;
|
||
}
|
||
|
||
/* Find and retrieve the header named NAME in the request data. If
|
||
found, set *BEGPTR to its starting, and *ENDPTR to its ending
|
||
position, and return true. Otherwise return false.
|
||
|
||
This function is used as a building block for resp_header_copy
|
||
and resp_header_strdup. */
|
||
|
||
static bool
|
||
resp_header_get (const struct response *resp, const char *name,
|
||
const char **begptr, const char **endptr)
|
||
{
|
||
int pos = resp_header_locate (resp, name, 0, begptr, endptr);
|
||
return pos != -1;
|
||
}
|
||
|
||
/* Copy the response header named NAME to buffer BUF, no longer than
|
||
BUFSIZE (BUFSIZE includes the terminating 0). If the header
|
||
exists, true is returned, false otherwise. If there should be no
|
||
limit on the size of the header, use resp_header_strdup instead.
|
||
|
||
If BUFSIZE is 0, no data is copied, but the boolean indication of
|
||
whether the header is present is still returned. */
|
||
|
||
static bool
|
||
resp_header_copy (const struct response *resp, const char *name,
|
||
char *buf, int bufsize)
|
||
{
|
||
const char *b, *e;
|
||
if (!resp_header_get (resp, name, &b, &e))
|
||
return false;
|
||
if (bufsize)
|
||
{
|
||
int len = MIN (e - b, bufsize - 1);
|
||
memcpy (buf, b, len);
|
||
buf[len] = '\0';
|
||
}
|
||
return true;
|
||
}
|
||
|
||
/* Return the value of header named NAME in RESP, allocated with
|
||
malloc. If such a header does not exist in RESP, return NULL. */
|
||
|
||
static char *
|
||
resp_header_strdup (const struct response *resp, const char *name)
|
||
{
|
||
const char *b, *e;
|
||
if (!resp_header_get (resp, name, &b, &e))
|
||
return NULL;
|
||
return strdupdelim (b, e);
|
||
}
|
||
|
||
/* Parse the HTTP status line, which is of format:
|
||
|
||
HTTP-Version SP Status-Code SP Reason-Phrase
|
||
|
||
The function returns the status-code, or -1 if the status line
|
||
appears malformed. The pointer to "reason-phrase" message is
|
||
returned in *MESSAGE. */
|
||
|
||
static int
|
||
resp_status (const struct response *resp, char **message)
|
||
{
|
||
int status;
|
||
const char *p, *end;
|
||
|
||
if (!resp->headers)
|
||
{
|
||
/* For a HTTP/0.9 response, assume status 200. */
|
||
if (message)
|
||
*message = xstrdup (_("No headers, assuming HTTP/0.9"));
|
||
return 200;
|
||
}
|
||
|
||
p = resp->headers[0];
|
||
end = resp->headers[1];
|
||
|
||
if (!end)
|
||
return -1;
|
||
|
||
/* "HTTP" */
|
||
if (end - p < 4 || 0 != strncmp (p, "HTTP", 4))
|
||
return -1;
|
||
p += 4;
|
||
|
||
/* Match the HTTP version. This is optional because Gnutella
|
||
servers have been reported to not specify HTTP version. */
|
||
if (p < end && *p == '/')
|
||
{
|
||
++p;
|
||
while (p < end && c_isdigit (*p))
|
||
++p;
|
||
if (p < end && *p == '.')
|
||
++p;
|
||
while (p < end && c_isdigit (*p))
|
||
++p;
|
||
}
|
||
|
||
while (p < end && c_isspace (*p))
|
||
++p;
|
||
if (end - p < 3 || !c_isdigit (p[0]) || !c_isdigit (p[1]) || !c_isdigit (p[2]))
|
||
return -1;
|
||
|
||
status = 100 * (p[0] - '0') + 10 * (p[1] - '0') + (p[2] - '0');
|
||
p += 3;
|
||
|
||
if (message)
|
||
{
|
||
while (p < end && c_isspace (*p))
|
||
++p;
|
||
while (p < end && c_isspace (end[-1]))
|
||
--end;
|
||
*message = strdupdelim (p, end);
|
||
}
|
||
|
||
return status;
|
||
}
|
||
|
||
/* Release the resources used by RESP. */
|
||
|
||
static void
|
||
resp_free (struct response *resp)
|
||
{
|
||
xfree_null (resp->headers);
|
||
xfree (resp);
|
||
}
|
||
|
||
/* Print a single line of response, the characters [b, e). We tried
|
||
getting away with
|
||
logprintf (LOG_VERBOSE, "%s%.*s\n", prefix, (int) (e - b), b);
|
||
but that failed to escape the non-printable characters and, in fact,
|
||
caused crashes in UTF-8 locales. */
|
||
|
||
static void
|
||
print_response_line(const char *prefix, const char *b, const char *e)
|
||
{
|
||
char *copy;
|
||
BOUNDED_TO_ALLOCA(b, e, copy);
|
||
logprintf (LOG_ALWAYS, "%s%s\n", prefix,
|
||
quotearg_style (escape_quoting_style, copy));
|
||
}
|
||
|
||
/* Print the server response, line by line, omitting the trailing CRLF
|
||
from individual header lines, and prefixed with PREFIX. */
|
||
|
||
static void
|
||
print_server_response (const struct response *resp, const char *prefix)
|
||
{
|
||
int i;
|
||
if (!resp->headers)
|
||
return;
|
||
for (i = 0; resp->headers[i + 1]; i++)
|
||
{
|
||
const char *b = resp->headers[i];
|
||
const char *e = resp->headers[i + 1];
|
||
/* Skip CRLF */
|
||
if (b < e && e[-1] == '\n')
|
||
--e;
|
||
if (b < e && e[-1] == '\r')
|
||
--e;
|
||
print_response_line(prefix, b, e);
|
||
}
|
||
}
|
||
|
||
/* Parse the `Content-Range' header and extract the information it
|
||
contains. Returns true if successful, false otherwise. */
|
||
static bool
|
||
parse_content_range (const char *hdr, wgint *first_byte_ptr,
|
||
wgint *last_byte_ptr, wgint *entity_length_ptr)
|
||
{
|
||
wgint num;
|
||
|
||
/* Ancient versions of Netscape proxy server, presumably predating
|
||
rfc2068, sent out `Content-Range' without the "bytes"
|
||
specifier. */
|
||
if (0 == strncasecmp (hdr, "bytes", 5))
|
||
{
|
||
hdr += 5;
|
||
/* "JavaWebServer/1.1.1" sends "bytes: x-y/z", contrary to the
|
||
HTTP spec. */
|
||
if (*hdr == ':')
|
||
++hdr;
|
||
while (c_isspace (*hdr))
|
||
++hdr;
|
||
if (!*hdr)
|
||
return false;
|
||
}
|
||
if (!c_isdigit (*hdr))
|
||
return false;
|
||
for (num = 0; c_isdigit (*hdr); hdr++)
|
||
num = 10 * num + (*hdr - '0');
|
||
if (*hdr != '-' || !c_isdigit (*(hdr + 1)))
|
||
return false;
|
||
*first_byte_ptr = num;
|
||
++hdr;
|
||
for (num = 0; c_isdigit (*hdr); hdr++)
|
||
num = 10 * num + (*hdr - '0');
|
||
if (*hdr != '/' || !c_isdigit (*(hdr + 1)))
|
||
return false;
|
||
*last_byte_ptr = num;
|
||
++hdr;
|
||
if (*hdr == '*')
|
||
num = -1;
|
||
else
|
||
for (num = 0; c_isdigit (*hdr); hdr++)
|
||
num = 10 * num + (*hdr - '0');
|
||
*entity_length_ptr = num;
|
||
return true;
|
||
}
|
||
|
||
/* Read the body of the request, but don't store it anywhere and don't
|
||
display a progress gauge. This is useful for reading the bodies of
|
||
administrative responses to which we will soon issue another
|
||
request. The response is not useful to the user, but reading it
|
||
allows us to continue using the same connection to the server.
|
||
|
||
If reading fails, false is returned, true otherwise. In debug
|
||
mode, the body is displayed for debugging purposes. */
|
||
|
||
static bool
|
||
skip_short_body (int fd, wgint contlen, bool chunked)
|
||
{
|
||
enum {
|
||
SKIP_SIZE = 512, /* size of the download buffer */
|
||
SKIP_THRESHOLD = 4096 /* the largest size we read */
|
||
};
|
||
wgint remaining_chunk_size = 0;
|
||
char dlbuf[SKIP_SIZE + 1];
|
||
dlbuf[SKIP_SIZE] = '\0'; /* so DEBUGP can safely print it */
|
||
|
||
assert (contlen != -1 || contlen);
|
||
|
||
/* If the body is too large, it makes more sense to simply close the
|
||
connection than to try to read the body. */
|
||
if (contlen > SKIP_THRESHOLD)
|
||
return false;
|
||
|
||
while (contlen > 0 || chunked)
|
||
{
|
||
int ret;
|
||
if (chunked)
|
||
{
|
||
if (remaining_chunk_size == 0)
|
||
{
|
||
char *line = fd_read_line (fd);
|
||
char *endl;
|
||
if (line == NULL)
|
||
break;
|
||
|
||
remaining_chunk_size = strtol (line, &endl, 16);
|
||
xfree (line);
|
||
|
||
if (remaining_chunk_size == 0)
|
||
{
|
||
line = fd_read_line (fd);
|
||
xfree_null (line);
|
||
break;
|
||
}
|
||
}
|
||
|
||
contlen = MIN (remaining_chunk_size, SKIP_SIZE);
|
||
}
|
||
|
||
DEBUGP (("Skipping %s bytes of body: [", number_to_static_string (contlen)));
|
||
|
||
ret = fd_read (fd, dlbuf, MIN (contlen, SKIP_SIZE), -1);
|
||
if (ret <= 0)
|
||
{
|
||
/* Don't normally report the error since this is an
|
||
optimization that should be invisible to the user. */
|
||
DEBUGP (("] aborting (%s).\n",
|
||
ret < 0 ? fd_errstr (fd) : "EOF received"));
|
||
return false;
|
||
}
|
||
contlen -= ret;
|
||
|
||
if (chunked)
|
||
{
|
||
remaining_chunk_size -= ret;
|
||
if (remaining_chunk_size == 0)
|
||
{
|
||
char *line = fd_read_line (fd);
|
||
if (line == NULL)
|
||
return false;
|
||
else
|
||
xfree (line);
|
||
}
|
||
}
|
||
|
||
/* Safe even if %.*s bogusly expects terminating \0 because
|
||
we've zero-terminated dlbuf above. */
|
||
DEBUGP (("%.*s", ret, dlbuf));
|
||
}
|
||
|
||
DEBUGP (("] done.\n"));
|
||
return true;
|
||
}
|
||
|
||
#define NOT_RFC2231 0
|
||
#define RFC2231_NOENCODING 1
|
||
#define RFC2231_ENCODING 2
|
||
|
||
/* extract_param extracts the parameter name into NAME.
|
||
However, if the parameter name is in RFC2231 format then
|
||
this function adjusts NAME by stripping of the trailing
|
||
characters that are not part of the name but are present to
|
||
indicate the presence of encoding information in the value
|
||
or a fragment of a long parameter value
|
||
*/
|
||
static int
|
||
modify_param_name(param_token *name)
|
||
{
|
||
const char *delim1 = memchr (name->b, '*', name->e - name->b);
|
||
const char *delim2 = memrchr (name->b, '*', name->e - name->b);
|
||
|
||
int result;
|
||
|
||
if(delim1 == NULL)
|
||
{
|
||
result = NOT_RFC2231;
|
||
}
|
||
else if(delim1 == delim2)
|
||
{
|
||
if ((name->e - 1) == delim1)
|
||
{
|
||
result = RFC2231_ENCODING;
|
||
}
|
||
else
|
||
{
|
||
result = RFC2231_NOENCODING;
|
||
}
|
||
name->e = delim1;
|
||
}
|
||
else
|
||
{
|
||
name->e = delim1;
|
||
result = RFC2231_ENCODING;
|
||
}
|
||
return result;
|
||
}
|
||
|
||
/* extract_param extract the paramater value into VALUE.
|
||
Like modify_param_name this function modifies VALUE by
|
||
stripping off the encoding information from the actual value
|
||
*/
|
||
static void
|
||
modify_param_value (param_token *value, int encoding_type )
|
||
{
|
||
if (RFC2231_ENCODING == encoding_type)
|
||
{
|
||
const char *delim = memrchr (value->b, '\'', value->e - value->b);
|
||
if ( delim != NULL )
|
||
{
|
||
value->b = (delim+1);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Extract a parameter from the string (typically an HTTP header) at
|
||
**SOURCE and advance SOURCE to the next parameter. Return false
|
||
when there are no more parameters to extract. The name of the
|
||
parameter is returned in NAME, and the value in VALUE. If the
|
||
parameter has no value, the token's value is zeroed out.
|
||
|
||
For example, if *SOURCE points to the string "attachment;
|
||
filename=\"foo bar\"", the first call to this function will return
|
||
the token named "attachment" and no value, and the second call will
|
||
return the token named "filename" and value "foo bar". The third
|
||
call will return false, indicating no more valid tokens. */
|
||
|
||
bool
|
||
extract_param (const char **source, param_token *name, param_token *value,
|
||
char separator)
|
||
{
|
||
const char *p = *source;
|
||
|
||
while (c_isspace (*p)) ++p;
|
||
if (!*p)
|
||
{
|
||
*source = p;
|
||
return false; /* no error; nothing more to extract */
|
||
}
|
||
|
||
/* Extract name. */
|
||
name->b = p;
|
||
while (*p && !c_isspace (*p) && *p != '=' && *p != separator) ++p;
|
||
name->e = p;
|
||
if (name->b == name->e)
|
||
return false; /* empty name: error */
|
||
while (c_isspace (*p)) ++p;
|
||
if (*p == separator || !*p) /* no value */
|
||
{
|
||
xzero (*value);
|
||
if (*p == separator) ++p;
|
||
*source = p;
|
||
return true;
|
||
}
|
||
if (*p != '=')
|
||
return false; /* error */
|
||
|
||
/* *p is '=', extract value */
|
||
++p;
|
||
while (c_isspace (*p)) ++p;
|
||
if (*p == '"') /* quoted */
|
||
{
|
||
value->b = ++p;
|
||
while (*p && *p != '"') ++p;
|
||
if (!*p)
|
||
return false;
|
||
value->e = p++;
|
||
/* Currently at closing quote; find the end of param. */
|
||
while (c_isspace (*p)) ++p;
|
||
while (*p && *p != separator) ++p;
|
||
if (*p == separator)
|
||
++p;
|
||
else if (*p)
|
||
/* garbage after closed quote, e.g. foo="bar"baz */
|
||
return false;
|
||
}
|
||
else /* unquoted */
|
||
{
|
||
value->b = p;
|
||
while (*p && *p != separator) ++p;
|
||
value->e = p;
|
||
while (value->e != value->b && c_isspace (value->e[-1]))
|
||
--value->e;
|
||
if (*p == separator) ++p;
|
||
}
|
||
*source = p;
|
||
|
||
int param_type = modify_param_name(name);
|
||
if (NOT_RFC2231 != param_type)
|
||
{
|
||
modify_param_value(value, param_type);
|
||
}
|
||
return true;
|
||
}
|
||
|
||
#undef NOT_RFC2231
|
||
#undef RFC2231_NOENCODING
|
||
#undef RFC2231_ENCODING
|
||
|
||
/* Appends the string represented by VALUE to FILENAME */
|
||
|
||
static void
|
||
append_value_to_filename (char **filename, param_token const * const value)
|
||
{
|
||
int original_length = strlen(*filename);
|
||
int new_length = strlen(*filename) + (value->e - value->b);
|
||
*filename = xrealloc (*filename, new_length+1);
|
||
memcpy (*filename + original_length, value->b, (value->e - value->b));
|
||
(*filename)[new_length] = '\0';
|
||
}
|
||
|
||
#undef MAX
|
||
#define MAX(p, q) ((p) > (q) ? (p) : (q))
|
||
|
||
/* Parse the contents of the `Content-Disposition' header, extracting
|
||
the information useful to Wget. Content-Disposition is a header
|
||
borrowed from MIME; when used in HTTP, it typically serves for
|
||
specifying the desired file name of the resource. For example:
|
||
|
||
Content-Disposition: attachment; filename="flora.jpg"
|
||
|
||
Wget will skip the tokens it doesn't care about, such as
|
||
"attachment" in the previous example; it will also skip other
|
||
unrecognized params. If the header is syntactically correct and
|
||
contains a file name, a copy of the file name is stored in
|
||
*filename and true is returned. Otherwise, the function returns
|
||
false.
|
||
|
||
The file name is stripped of directory components and must not be
|
||
empty.
|
||
|
||
Historically, this function returned filename prefixed with opt.dir_prefix,
|
||
now that logic is handled by the caller, new code should pay attention,
|
||
changed by crq, Sep 2010.
|
||
|
||
*/
|
||
static bool
|
||
parse_content_disposition (const char *hdr, char **filename)
|
||
{
|
||
param_token name, value;
|
||
*filename = NULL;
|
||
while (extract_param (&hdr, &name, &value, ';'))
|
||
{
|
||
int isFilename = BOUNDED_EQUAL_NO_CASE ( name.b, name.e, "filename" );
|
||
if ( isFilename && value.b != NULL)
|
||
{
|
||
/* Make the file name begin at the last slash or backslash. */
|
||
const char *last_slash = memrchr (value.b, '/', value.e - value.b);
|
||
const char *last_bs = memrchr (value.b, '\\', value.e - value.b);
|
||
if (last_slash && last_bs)
|
||
value.b = 1 + MAX (last_slash, last_bs);
|
||
else if (last_slash || last_bs)
|
||
value.b = 1 + (last_slash ? last_slash : last_bs);
|
||
if (value.b == value.e)
|
||
continue;
|
||
|
||
if (*filename)
|
||
append_value_to_filename (filename, &value);
|
||
else
|
||
*filename = strdupdelim (value.b, value.e);
|
||
}
|
||
}
|
||
|
||
if (*filename)
|
||
return true;
|
||
else
|
||
return false;
|
||
}
|
||
|
||
|
||
/* Persistent connections. Currently, we cache the most recently used
|
||
connection as persistent, provided that the HTTP server agrees to
|
||
make it such. The persistence data is stored in the variables
|
||
below. Ideally, it should be possible to cache an arbitrary fixed
|
||
number of these connections. */
|
||
|
||
/* Whether a persistent connection is active. */
|
||
static bool pconn_active;
|
||
|
||
static struct {
|
||
/* The socket of the connection. */
|
||
int socket;
|
||
|
||
/* Host and port of the currently active persistent connection. */
|
||
char *host;
|
||
int port;
|
||
|
||
/* Whether a ssl handshake has occoured on this connection. */
|
||
bool ssl;
|
||
|
||
/* Whether the connection was authorized. This is only done by
|
||
NTLM, which authorizes *connections* rather than individual
|
||
requests. (That practice is peculiar for HTTP, but it is a
|
||
useful optimization.) */
|
||
bool authorized;
|
||
|
||
#ifdef ENABLE_NTLM
|
||
/* NTLM data of the current connection. */
|
||
struct ntlmdata ntlm;
|
||
#endif
|
||
} pconn;
|
||
|
||
/* Mark the persistent connection as invalid and free the resources it
|
||
uses. This is used by the CLOSE_* macros after they forcefully
|
||
close a registered persistent connection. */
|
||
|
||
static void
|
||
invalidate_persistent (void)
|
||
{
|
||
DEBUGP (("Disabling further reuse of socket %d.\n", pconn.socket));
|
||
pconn_active = false;
|
||
fd_close (pconn.socket);
|
||
xfree (pconn.host);
|
||
xzero (pconn);
|
||
}
|
||
|
||
/* Register FD, which should be a TCP/IP connection to HOST:PORT, as
|
||
persistent. This will enable someone to use the same connection
|
||
later. In the context of HTTP, this must be called only AFTER the
|
||
response has been received and the server has promised that the
|
||
connection will remain alive.
|
||
|
||
If a previous connection was persistent, it is closed. */
|
||
|
||
static void
|
||
register_persistent (const char *host, int port, int fd, bool ssl)
|
||
{
|
||
if (pconn_active)
|
||
{
|
||
if (pconn.socket == fd)
|
||
{
|
||
/* The connection FD is already registered. */
|
||
return;
|
||
}
|
||
else
|
||
{
|
||
/* The old persistent connection is still active; close it
|
||
first. This situation arises whenever a persistent
|
||
connection exists, but we then connect to a different
|
||
host, and try to register a persistent connection to that
|
||
one. */
|
||
invalidate_persistent ();
|
||
}
|
||
}
|
||
|
||
pconn_active = true;
|
||
pconn.socket = fd;
|
||
pconn.host = xstrdup (host);
|
||
pconn.port = port;
|
||
pconn.ssl = ssl;
|
||
pconn.authorized = false;
|
||
|
||
DEBUGP (("Registered socket %d for persistent reuse.\n", fd));
|
||
}
|
||
|
||
/* Return true if a persistent connection is available for connecting
|
||
to HOST:PORT. */
|
||
|
||
static bool
|
||
persistent_available_p (const char *host, int port, bool ssl,
|
||
bool *host_lookup_failed)
|
||
{
|
||
/* First, check whether a persistent connection is active at all. */
|
||
if (!pconn_active)
|
||
return false;
|
||
|
||
/* If we want SSL and the last connection wasn't or vice versa,
|
||
don't use it. Checking for host and port is not enough because
|
||
HTTP and HTTPS can apparently coexist on the same port. */
|
||
if (ssl != pconn.ssl)
|
||
return false;
|
||
|
||
/* If we're not connecting to the same port, we're not interested. */
|
||
if (port != pconn.port)
|
||
return false;
|
||
|
||
/* If the host is the same, we're in business. If not, there is
|
||
still hope -- read below. */
|
||
if (0 != strcasecmp (host, pconn.host))
|
||
{
|
||
/* Check if pconn.socket is talking to HOST under another name.
|
||
This happens often when both sites are virtual hosts
|
||
distinguished only by name and served by the same network
|
||
interface, and hence the same web server (possibly set up by
|
||
the ISP and serving many different web sites). This
|
||
admittedly unconventional optimization does not contradict
|
||
HTTP and works well with popular server software. */
|
||
|
||
bool found;
|
||
ip_address ip;
|
||
struct address_list *al;
|
||
|
||
if (ssl)
|
||
/* Don't try to talk to two different SSL sites over the same
|
||
secure connection! (Besides, it's not clear that
|
||
name-based virtual hosting is even possible with SSL.) */
|
||
return false;
|
||
|
||
/* If pconn.socket's peer is one of the IP addresses HOST
|
||
resolves to, pconn.socket is for all intents and purposes
|
||
already talking to HOST. */
|
||
|
||
if (!socket_ip_address (pconn.socket, &ip, ENDPOINT_PEER))
|
||
{
|
||
/* Can't get the peer's address -- something must be very
|
||
wrong with the connection. */
|
||
invalidate_persistent ();
|
||
return false;
|
||
}
|
||
al = lookup_host (host, 0);
|
||
if (!al)
|
||
{
|
||
*host_lookup_failed = true;
|
||
return false;
|
||
}
|
||
|
||
found = address_list_contains (al, &ip);
|
||
address_list_release (al);
|
||
|
||
if (!found)
|
||
return false;
|
||
|
||
/* The persistent connection's peer address was found among the
|
||
addresses HOST resolved to; therefore, pconn.sock is in fact
|
||
already talking to HOST -- no need to reconnect. */
|
||
}
|
||
|
||
/* Finally, check whether the connection is still open. This is
|
||
important because most servers implement liberal (short) timeout
|
||
on persistent connections. Wget can of course always reconnect
|
||
if the connection doesn't work out, but it's nicer to know in
|
||
advance. This test is a logical followup of the first test, but
|
||
is "expensive" and therefore placed at the end of the list.
|
||
|
||
(Current implementation of test_socket_open has a nice side
|
||
effect that it treats sockets with pending data as "closed".
|
||
This is exactly what we want: if a broken server sends message
|
||
body in response to HEAD, or if it sends more than conent-length
|
||
data, we won't reuse the corrupted connection.) */
|
||
|
||
if (!test_socket_open (pconn.socket))
|
||
{
|
||
/* Oops, the socket is no longer open. Now that we know that,
|
||
let's invalidate the persistent connection before returning
|
||
0. */
|
||
invalidate_persistent ();
|
||
return false;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* The idea behind these two CLOSE macros is to distinguish between
|
||
two cases: one when the job we've been doing is finished, and we
|
||
want to close the connection and leave, and two when something is
|
||
seriously wrong and we're closing the connection as part of
|
||
cleanup.
|
||
|
||
In case of keep_alive, CLOSE_FINISH should leave the connection
|
||
open, while CLOSE_INVALIDATE should still close it.
|
||
|
||
Note that the semantics of the flag `keep_alive' is "this
|
||
connection *will* be reused (the server has promised not to close
|
||
the connection once we're done)", while the semantics of
|
||
`pc_active_p && (fd) == pc_last_fd' is "we're *now* using an
|
||
active, registered connection". */
|
||
|
||
#define CLOSE_FINISH(fd) do { \
|
||
if (!keep_alive) \
|
||
{ \
|
||
if (pconn_active && (fd) == pconn.socket) \
|
||
invalidate_persistent (); \
|
||
else \
|
||
{ \
|
||
fd_close (fd); \
|
||
fd = -1; \
|
||
} \
|
||
} \
|
||
} while (0)
|
||
|
||
#define CLOSE_INVALIDATE(fd) do { \
|
||
if (pconn_active && (fd) == pconn.socket) \
|
||
invalidate_persistent (); \
|
||
else \
|
||
fd_close (fd); \
|
||
fd = -1; \
|
||
} while (0)
|
||
|
||
struct http_stat
|
||
{
|
||
wgint len; /* received length */
|
||
wgint contlen; /* expected length */
|
||
wgint restval; /* the restart value */
|
||
int res; /* the result of last read */
|
||
char *rderrmsg; /* error message from read error */
|
||
char *newloc; /* new location (redirection) */
|
||
char *remote_time; /* remote time-stamp string */
|
||
char *error; /* textual HTTP error */
|
||
int statcode; /* status code */
|
||
char *message; /* status message */
|
||
wgint rd_size; /* amount of data read from socket */
|
||
double dltime; /* time it took to download the data */
|
||
const char *referer; /* value of the referer header. */
|
||
char *local_file; /* local file name. */
|
||
bool existence_checked; /* true if we already checked for a file's
|
||
existence after having begun to download
|
||
(needed in gethttp for when connection is
|
||
interrupted/restarted. */
|
||
bool timestamp_checked; /* true if pre-download time-stamping checks
|
||
* have already been performed */
|
||
char *orig_file_name; /* name of file to compare for time-stamping
|
||
* (might be != local_file if -K is set) */
|
||
wgint orig_file_size; /* size of file to compare for time-stamping */
|
||
time_t orig_file_tstamp; /* time-stamp of file to compare for
|
||
* time-stamping */
|
||
};
|
||
|
||
static void
|
||
free_hstat (struct http_stat *hs)
|
||
{
|
||
xfree_null (hs->newloc);
|
||
xfree_null (hs->remote_time);
|
||
xfree_null (hs->error);
|
||
xfree_null (hs->rderrmsg);
|
||
xfree_null (hs->local_file);
|
||
xfree_null (hs->orig_file_name);
|
||
xfree_null (hs->message);
|
||
|
||
/* Guard against being called twice. */
|
||
hs->newloc = NULL;
|
||
hs->remote_time = NULL;
|
||
hs->error = NULL;
|
||
}
|
||
|
||
static void
|
||
get_file_flags (const char *filename, int *dt)
|
||
{
|
||
logprintf (LOG_VERBOSE, _("\
|
||
File %s already there; not retrieving.\n\n"), quote (filename));
|
||
/* If the file is there, we suppose it's retrieved OK. */
|
||
*dt |= RETROKF;
|
||
|
||
/* #### Bogusness alert. */
|
||
/* If its suffix is "html" or "htm" or similar, assume text/html. */
|
||
if (has_html_suffix_p (filename))
|
||
*dt |= TEXTHTML;
|
||
}
|
||
|
||
/* Download the response body from the socket and writes it to
|
||
an output file. The headers have already been read from the
|
||
socket. If WARC is enabled, the response body will also be
|
||
written to a WARC response record.
|
||
|
||
hs, contlen, contrange, chunked_transfer_encoding and url are
|
||
parameters from the gethttp method. fp is a pointer to the
|
||
output file.
|
||
|
||
url, warc_timestamp_str, warc_request_uuid, warc_ip, type
|
||
and statcode will be saved in the headers of the WARC record.
|
||
The head parameter contains the HTTP headers of the response.
|
||
|
||
If fp is NULL and WARC is enabled, the response body will be
|
||
written only to the WARC file. If WARC is disabled and fp
|
||
is a file pointer, the data will be written to the file.
|
||
If fp is a file pointer and WARC is enabled, the body will
|
||
be written to both destinations.
|
||
|
||
Returns the error code. */
|
||
static int
|
||
read_response_body (struct http_stat *hs, int sock, FILE *fp, wgint contlen,
|
||
wgint contrange, bool chunked_transfer_encoding,
|
||
char *url, char *warc_timestamp_str, char *warc_request_uuid,
|
||
ip_address *warc_ip, char *type, int statcode, char *head)
|
||
{
|
||
int warc_payload_offset = 0;
|
||
FILE *warc_tmp = NULL;
|
||
int warcerr = 0;
|
||
|
||
if (opt.warc_filename != NULL)
|
||
{
|
||
/* Open a temporary file where we can write the response before we
|
||
add it to the WARC record. */
|
||
warc_tmp = warc_tempfile ();
|
||
if (warc_tmp == NULL)
|
||
warcerr = WARC_TMP_FOPENERR;
|
||
|
||
if (warcerr == 0)
|
||
{
|
||
/* We should keep the response headers for the WARC record. */
|
||
int head_len = strlen (head);
|
||
int warc_tmp_written = fwrite (head, 1, head_len, warc_tmp);
|
||
if (warc_tmp_written != head_len)
|
||
warcerr = WARC_TMP_FWRITEERR;
|
||
warc_payload_offset = head_len;
|
||
}
|
||
|
||
if (warcerr != 0)
|
||
{
|
||
if (warc_tmp != NULL)
|
||
fclose (warc_tmp);
|
||
return warcerr;
|
||
}
|
||
}
|
||
|
||
if (fp != NULL)
|
||
{
|
||
/* This confuses the timestamping code that checks for file size.
|
||
#### The timestamping code should be smarter about file size. */
|
||
if (opt.save_headers && hs->restval == 0)
|
||
fwrite (head, 1, strlen (head), fp);
|
||
}
|
||
|
||
/* Read the response body. */
|
||
int flags = 0;
|
||
if (contlen != -1)
|
||
/* If content-length is present, read that much; otherwise, read
|
||
until EOF. The HTTP spec doesn't require the server to
|
||
actually close the connection when it's done sending data. */
|
||
flags |= rb_read_exactly;
|
||
if (fp != NULL && hs->restval > 0 && contrange == 0)
|
||
/* If the server ignored our range request, instruct fd_read_body
|
||
to skip the first RESTVAL bytes of body. */
|
||
flags |= rb_skip_startpos;
|
||
if (chunked_transfer_encoding)
|
||
flags |= rb_chunked_transfer_encoding;
|
||
|
||
hs->len = hs->restval;
|
||
hs->rd_size = 0;
|
||
/* Download the response body and write it to fp.
|
||
If we are working on a WARC file, we simultaneously write the
|
||
response body to warc_tmp. */
|
||
hs->res = fd_read_body (sock, fp, contlen != -1 ? contlen : 0,
|
||
hs->restval, &hs->rd_size, &hs->len, &hs->dltime,
|
||
flags, warc_tmp);
|
||
if (hs->res >= 0)
|
||
{
|
||
if (warc_tmp != NULL)
|
||
{
|
||
/* Create a response record and write it to the WARC file.
|
||
Note: per the WARC standard, the request and response should share
|
||
the same date header. We re-use the timestamp of the request.
|
||
The response record should also refer to the uuid of the request. */
|
||
bool r = warc_write_response_record (url, warc_timestamp_str,
|
||
warc_request_uuid, warc_ip,
|
||
warc_tmp, warc_payload_offset,
|
||
type, statcode, hs->newloc);
|
||
|
||
/* warc_write_response_record has closed warc_tmp. */
|
||
|
||
if (! r)
|
||
return WARC_ERR;
|
||
}
|
||
|
||
return RETRFINISHED;
|
||
}
|
||
|
||
if (warc_tmp != NULL)
|
||
fclose (warc_tmp);
|
||
|
||
if (hs->res == -2)
|
||
{
|
||
/* Error while writing to fd. */
|
||
return FWRITEERR;
|
||
}
|
||
else if (hs->res == -3)
|
||
{
|
||
/* Error while writing to warc_tmp. */
|
||
return WARC_TMP_FWRITEERR;
|
||
}
|
||
else
|
||
{
|
||
/* A read error! */
|
||
hs->rderrmsg = xstrdup (fd_errstr (sock));
|
||
return RETRFINISHED;
|
||
}
|
||
}
|
||
|
||
#define BEGINS_WITH(line, string_constant) \
|
||
(!strncasecmp (line, string_constant, sizeof (string_constant) - 1) \
|
||
&& (c_isspace (line[sizeof (string_constant) - 1]) \
|
||
|| !line[sizeof (string_constant) - 1]))
|
||
|
||
#ifdef __VMS
|
||
#define SET_USER_AGENT(req) do { \
|
||
if (!opt.useragent) \
|
||
request_set_header (req, "User-Agent", \
|
||
aprintf ("Wget/%s (VMS %s %s)", \
|
||
version_string, vms_arch(), vms_vers()), \
|
||
rel_value); \
|
||
else if (*opt.useragent) \
|
||
request_set_header (req, "User-Agent", opt.useragent, rel_none); \
|
||
} while (0)
|
||
#else /* def __VMS */
|
||
#define SET_USER_AGENT(req) do { \
|
||
if (!opt.useragent) \
|
||
request_set_header (req, "User-Agent", \
|
||
aprintf ("Wget/%s (%s)", \
|
||
version_string, OS_TYPE), \
|
||
rel_value); \
|
||
else if (*opt.useragent) \
|
||
request_set_header (req, "User-Agent", opt.useragent, rel_none); \
|
||
} while (0)
|
||
#endif /* def __VMS [else] */
|
||
|
||
/* The flags that allow clobbering the file (opening with "wb").
|
||
Defined here to avoid repetition later. #### This will require
|
||
rework. */
|
||
#define ALLOW_CLOBBER (opt.noclobber || opt.always_rest || opt.timestamping \
|
||
|| opt.dirstruct || opt.output_document)
|
||
|
||
/* Retrieve a document through HTTP protocol. It recognizes status
|
||
code, and correctly handles redirections. It closes the network
|
||
socket. If it receives an error from the functions below it, it
|
||
will print it if there is enough information to do so (almost
|
||
always), returning the error to the caller (i.e. http_loop).
|
||
|
||
Various HTTP parameters are stored to hs.
|
||
|
||
If PROXY is non-NULL, the connection will be made to the proxy
|
||
server, and u->url will be requested. */
|
||
static uerr_t
|
||
gethttp (struct url *u, struct http_stat *hs, int *dt, struct url *proxy,
|
||
struct iri *iri, int count)
|
||
{
|
||
struct request *req;
|
||
|
||
char *type;
|
||
char *user, *passwd;
|
||
char *proxyauth;
|
||
int statcode;
|
||
int write_error;
|
||
wgint contlen, contrange;
|
||
struct url *conn;
|
||
FILE *fp;
|
||
int err;
|
||
|
||
int sock = -1;
|
||
|
||
/* Set to 1 when the authorization has already been sent and should
|
||
not be tried again. */
|
||
bool auth_finished = false;
|
||
|
||
/* Set to 1 when just globally-set Basic authorization has been sent;
|
||
* should prevent further Basic negotiations, but not other
|
||
* mechanisms. */
|
||
bool basic_auth_finished = false;
|
||
|
||
/* Whether NTLM authentication is used for this request. */
|
||
bool ntlm_seen = false;
|
||
|
||
/* Whether our connection to the remote host is through SSL. */
|
||
bool using_ssl = false;
|
||
|
||
/* Whether a HEAD request will be issued (as opposed to GET or
|
||
POST). */
|
||
bool head_only = !!(*dt & HEAD_ONLY);
|
||
|
||
char *head;
|
||
struct response *resp;
|
||
char hdrval[256];
|
||
char *message;
|
||
|
||
/* Declare WARC variables. */
|
||
bool warc_enabled = (opt.warc_filename != NULL);
|
||
FILE *warc_tmp = NULL;
|
||
char warc_timestamp_str [21];
|
||
char warc_request_uuid [48];
|
||
ip_address *warc_ip = NULL;
|
||
off_t warc_payload_offset = -1;
|
||
|
||
/* Whether this connection will be kept alive after the HTTP request
|
||
is done. */
|
||
bool keep_alive;
|
||
|
||
/* Is the server using the chunked transfer encoding? */
|
||
bool chunked_transfer_encoding = false;
|
||
|
||
/* Whether keep-alive should be inhibited. */
|
||
bool inhibit_keep_alive =
|
||
!opt.http_keep_alive || opt.ignore_length;
|
||
|
||
/* Headers sent when using POST. */
|
||
wgint post_data_size = 0;
|
||
|
||
bool host_lookup_failed = false;
|
||
|
||
#ifdef HAVE_SSL
|
||
if (u->scheme == SCHEME_HTTPS)
|
||
{
|
||
/* Initialize the SSL context. After this has once been done,
|
||
it becomes a no-op. */
|
||
if (!ssl_init ())
|
||
{
|
||
scheme_disable (SCHEME_HTTPS);
|
||
logprintf (LOG_NOTQUIET,
|
||
_("Disabling SSL due to encountered errors.\n"));
|
||
return SSLINITFAILED;
|
||
}
|
||
}
|
||
#endif /* HAVE_SSL */
|
||
|
||
/* Initialize certain elements of struct http_stat. */
|
||
hs->len = 0;
|
||
hs->contlen = -1;
|
||
hs->res = -1;
|
||
hs->rderrmsg = NULL;
|
||
hs->newloc = NULL;
|
||
hs->remote_time = NULL;
|
||
hs->error = NULL;
|
||
hs->message = NULL;
|
||
|
||
conn = u;
|
||
|
||
/* Prepare the request to send. */
|
||
|
||
req = request_new ();
|
||
{
|
||
char *meth_arg;
|
||
const char *meth = "GET";
|
||
if (head_only)
|
||
meth = "HEAD";
|
||
else if (opt.post_file_name || opt.post_data)
|
||
meth = "POST";
|
||
/* Use the full path, i.e. one that includes the leading slash and
|
||
the query string. E.g. if u->path is "foo/bar" and u->query is
|
||
"param=value", full_path will be "/foo/bar?param=value". */
|
||
if (proxy
|
||
#ifdef HAVE_SSL
|
||
/* When using SSL over proxy, CONNECT establishes a direct
|
||
connection to the HTTPS server. Therefore use the same
|
||
argument as when talking to the server directly. */
|
||
&& u->scheme != SCHEME_HTTPS
|
||
#endif
|
||
)
|
||
meth_arg = xstrdup (u->url);
|
||
else
|
||
meth_arg = url_full_path (u);
|
||
request_set_method (req, meth, meth_arg);
|
||
}
|
||
|
||
request_set_header (req, "Referer", (char *) hs->referer, rel_none);
|
||
if (*dt & SEND_NOCACHE)
|
||
{
|
||
/* Cache-Control MUST be obeyed by all HTTP/1.1 caching mechanisms... */
|
||
request_set_header (req, "Cache-Control", "no-cache, must-revalidate", rel_none);
|
||
|
||
/* ... but some HTTP/1.0 caches doesn't implement Cache-Control. */
|
||
request_set_header (req, "Pragma", "no-cache", rel_none);
|
||
}
|
||
if (hs->restval)
|
||
request_set_header (req, "Range",
|
||
aprintf ("bytes=%s-",
|
||
number_to_static_string (hs->restval)),
|
||
rel_value);
|
||
SET_USER_AGENT (req);
|
||
request_set_header (req, "Accept", "*/*", rel_none);
|
||
|
||
/* Find the username and password for authentication. */
|
||
user = u->user;
|
||
passwd = u->passwd;
|
||
search_netrc (u->host, (const char **)&user, (const char **)&passwd, 0);
|
||
user = user ? user : (opt.http_user ? opt.http_user : opt.user);
|
||
passwd = passwd ? passwd : (opt.http_passwd ? opt.http_passwd : opt.passwd);
|
||
|
||
/* We only do "site-wide" authentication with "global" user/password
|
||
* values unless --auth-no-challange has been requested; URL user/password
|
||
* info overrides. */
|
||
if (user && passwd && (!u->user || opt.auth_without_challenge))
|
||
{
|
||
/* If this is a host for which we've already received a Basic
|
||
* challenge, we'll go ahead and send Basic authentication creds. */
|
||
basic_auth_finished = maybe_send_basic_creds(u->host, user, passwd, req);
|
||
}
|
||
|
||
/* Generate the Host header, HOST:PORT. Take into account that:
|
||
|
||
- Broken server-side software often doesn't recognize the PORT
|
||
argument, so we must generate "Host: www.server.com" instead of
|
||
"Host: www.server.com:80" (and likewise for https port).
|
||
|
||
- IPv6 addresses contain ":", so "Host: 3ffe:8100:200:2::2:1234"
|
||
becomes ambiguous and needs to be rewritten as "Host:
|
||
[3ffe:8100:200:2::2]:1234". */
|
||
{
|
||
/* Formats arranged for hfmt[add_port][add_squares]. */
|
||
static const char *hfmt[][2] = {
|
||
{ "%s", "[%s]" }, { "%s:%d", "[%s]:%d" }
|
||
};
|
||
int add_port = u->port != scheme_default_port (u->scheme);
|
||
int add_squares = strchr (u->host, ':') != NULL;
|
||
request_set_header (req, "Host",
|
||
aprintf (hfmt[add_port][add_squares], u->host, u->port),
|
||
rel_value);
|
||
}
|
||
|
||
if (inhibit_keep_alive)
|
||
request_set_header (req, "Connection", "Close", rel_none);
|
||
else
|
||
{
|
||
if (proxy == NULL)
|
||
request_set_header (req, "Connection", "Keep-Alive", rel_none);
|
||
else
|
||
{
|
||
request_set_header (req, "Connection", "Close", rel_none);
|
||
request_set_header (req, "Proxy-Connection", "Keep-Alive", rel_none);
|
||
}
|
||
}
|
||
|
||
if (opt.post_data || opt.post_file_name)
|
||
{
|
||
request_set_header (req, "Content-Type",
|
||
"application/x-www-form-urlencoded", rel_none);
|
||
if (opt.post_data)
|
||
post_data_size = strlen (opt.post_data);
|
||
else
|
||
{
|
||
post_data_size = file_size (opt.post_file_name);
|
||
if (post_data_size == -1)
|
||
{
|
||
logprintf (LOG_NOTQUIET, _("POST data file %s missing: %s\n"),
|
||
quote (opt.post_file_name), strerror (errno));
|
||
post_data_size = 0;
|
||
}
|
||
}
|
||
request_set_header (req, "Content-Length",
|
||
xstrdup (number_to_static_string (post_data_size)),
|
||
rel_value);
|
||
}
|
||
|
||
retry_with_auth:
|
||
/* We need to come back here when the initial attempt to retrieve
|
||
without authorization header fails. (Expected to happen at least
|
||
for the Digest authorization scheme.) */
|
||
|
||
if (opt.cookies)
|
||
request_set_header (req, "Cookie",
|
||
cookie_header (wget_cookie_jar,
|
||
u->host, u->port, u->path,
|
||
#ifdef HAVE_SSL
|
||
u->scheme == SCHEME_HTTPS
|
||
#else
|
||
0
|
||
#endif
|
||
),
|
||
rel_value);
|
||
|
||
/* Add the user headers. */
|
||
if (opt.user_headers)
|
||
{
|
||
int i;
|
||
for (i = 0; opt.user_headers[i]; i++)
|
||
request_set_user_header (req, opt.user_headers[i]);
|
||
}
|
||
|
||
proxyauth = NULL;
|
||
if (proxy)
|
||
{
|
||
char *proxy_user, *proxy_passwd;
|
||
/* For normal username and password, URL components override
|
||
command-line/wgetrc parameters. With proxy
|
||
authentication, it's the reverse, because proxy URLs are
|
||
normally the "permanent" ones, so command-line args
|
||
should take precedence. */
|
||
if (opt.proxy_user && opt.proxy_passwd)
|
||
{
|
||
proxy_user = opt.proxy_user;
|
||
proxy_passwd = opt.proxy_passwd;
|
||
}
|
||
else
|
||
{
|
||
proxy_user = proxy->user;
|
||
proxy_passwd = proxy->passwd;
|
||
}
|
||
/* #### This does not appear right. Can't the proxy request,
|
||
say, `Digest' authentication? */
|
||
if (proxy_user && proxy_passwd)
|
||
proxyauth = basic_authentication_encode (proxy_user, proxy_passwd);
|
||
|
||
/* If we're using a proxy, we will be connecting to the proxy
|
||
server. */
|
||
conn = proxy;
|
||
|
||
/* Proxy authorization over SSL is handled below. */
|
||
#ifdef HAVE_SSL
|
||
if (u->scheme != SCHEME_HTTPS)
|
||
#endif
|
||
request_set_header (req, "Proxy-Authorization", proxyauth, rel_value);
|
||
}
|
||
|
||
keep_alive = true;
|
||
|
||
/* Establish the connection. */
|
||
|
||
if (inhibit_keep_alive)
|
||
keep_alive = false;
|
||
else
|
||
{
|
||
/* Look for a persistent connection to target host, unless a
|
||
proxy is used. The exception is when SSL is in use, in which
|
||
case the proxy is nothing but a passthrough to the target
|
||
host, registered as a connection to the latter. */
|
||
struct url *relevant = conn;
|
||
#ifdef HAVE_SSL
|
||
if (u->scheme == SCHEME_HTTPS)
|
||
relevant = u;
|
||
#endif
|
||
|
||
if (persistent_available_p (relevant->host, relevant->port,
|
||
#ifdef HAVE_SSL
|
||
relevant->scheme == SCHEME_HTTPS,
|
||
#else
|
||
0,
|
||
#endif
|
||
&host_lookup_failed))
|
||
{
|
||
int family = socket_family (pconn.socket, ENDPOINT_PEER);
|
||
sock = pconn.socket;
|
||
using_ssl = pconn.ssl;
|
||
if (family == AF_INET6)
|
||
logprintf (LOG_VERBOSE, _("Reusing existing connection to [%s]:%d.\n"),
|
||
quotearg_style (escape_quoting_style, pconn.host),
|
||
pconn.port);
|
||
else
|
||
logprintf (LOG_VERBOSE, _("Reusing existing connection to %s:%d.\n"),
|
||
quotearg_style (escape_quoting_style, pconn.host),
|
||
pconn.port);
|
||
DEBUGP (("Reusing fd %d.\n", sock));
|
||
if (pconn.authorized)
|
||
/* If the connection is already authorized, the "Basic"
|
||
authorization added by code above is unnecessary and
|
||
only hurts us. */
|
||
request_remove_header (req, "Authorization");
|
||
}
|
||
else if (host_lookup_failed)
|
||
{
|
||
request_free (req);
|
||
logprintf(LOG_NOTQUIET,
|
||
_("%s: unable to resolve host address %s\n"),
|
||
exec_name, quote (relevant->host));
|
||
return HOSTERR;
|
||
}
|
||
}
|
||
|
||
if (sock < 0)
|
||
{
|
||
sock = connect_to_host (conn->host, conn->port);
|
||
if (sock == E_HOST)
|
||
{
|
||
request_free (req);
|
||
return HOSTERR;
|
||
}
|
||
else if (sock < 0)
|
||
{
|
||
request_free (req);
|
||
return (retryable_socket_connect_error (errno)
|
||
? CONERROR : CONIMPOSSIBLE);
|
||
}
|
||
|
||
#ifdef HAVE_SSL
|
||
if (proxy && u->scheme == SCHEME_HTTPS)
|
||
{
|
||
/* When requesting SSL URLs through proxies, use the
|
||
CONNECT method to request passthrough. */
|
||
struct request *connreq = request_new ();
|
||
request_set_method (connreq, "CONNECT",
|
||
aprintf ("%s:%d", u->host, u->port));
|
||
SET_USER_AGENT (connreq);
|
||
if (proxyauth)
|
||
{
|
||
request_set_header (connreq, "Proxy-Authorization",
|
||
proxyauth, rel_value);
|
||
/* Now that PROXYAUTH is part of the CONNECT request,
|
||
zero it out so we don't send proxy authorization with
|
||
the regular request below. */
|
||
proxyauth = NULL;
|
||
}
|
||
/* Examples in rfc2817 use the Host header in CONNECT
|
||
requests. I don't see how that gains anything, given
|
||
that the contents of Host would be exactly the same as
|
||
the contents of CONNECT. */
|
||
|
||
write_error = request_send (connreq, sock, 0);
|
||
request_free (connreq);
|
||
if (write_error < 0)
|
||
{
|
||
CLOSE_INVALIDATE (sock);
|
||
request_free (req);
|
||
return WRITEFAILED;
|
||
}
|
||
|
||
head = read_http_response_head (sock);
|
||
if (!head)
|
||
{
|
||
logprintf (LOG_VERBOSE, _("Failed reading proxy response: %s\n"),
|
||
fd_errstr (sock));
|
||
CLOSE_INVALIDATE (sock);
|
||
request_free (req);
|
||
return HERR;
|
||
}
|
||
message = NULL;
|
||
if (!*head)
|
||
{
|
||
xfree (head);
|
||
goto failed_tunnel;
|
||
}
|
||
DEBUGP (("proxy responded with: [%s]\n", head));
|
||
|
||
resp = resp_new (head);
|
||
statcode = resp_status (resp, &message);
|
||
if (statcode < 0)
|
||
{
|
||
char *tms = datetime_str (time (NULL));
|
||
logprintf (LOG_VERBOSE, "%d\n", statcode);
|
||
logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"), tms, statcode,
|
||
quotearg_style (escape_quoting_style,
|
||
_("Malformed status line")));
|
||
xfree (head);
|
||
request_free (req);
|
||
return HERR;
|
||
}
|
||
hs->message = xstrdup (message);
|
||
resp_free (resp);
|
||
xfree (head);
|
||
if (statcode != 200)
|
||
{
|
||
failed_tunnel:
|
||
logprintf (LOG_NOTQUIET, _("Proxy tunneling failed: %s"),
|
||
message ? quotearg_style (escape_quoting_style, message) : "?");
|
||
xfree_null (message);
|
||
request_free (req);
|
||
return CONSSLERR;
|
||
}
|
||
xfree_null (message);
|
||
|
||
/* SOCK is now *really* connected to u->host, so update CONN
|
||
to reflect this. That way register_persistent will
|
||
register SOCK as being connected to u->host:u->port. */
|
||
conn = u;
|
||
}
|
||
|
||
if (conn->scheme == SCHEME_HTTPS)
|
||
{
|
||
if (!ssl_connect_wget (sock, u->host))
|
||
{
|
||
fd_close (sock);
|
||
request_free (req);
|
||
return CONSSLERR;
|
||
}
|
||
else if (!ssl_check_certificate (sock, u->host))
|
||
{
|
||
fd_close (sock);
|
||
request_free (req);
|
||
return VERIFCERTERR;
|
||
}
|
||
using_ssl = true;
|
||
}
|
||
#endif /* HAVE_SSL */
|
||
}
|
||
|
||
/* Open the temporary file where we will write the request. */
|
||
if (warc_enabled)
|
||
{
|
||
warc_tmp = warc_tempfile ();
|
||
if (warc_tmp == NULL)
|
||
{
|
||
CLOSE_INVALIDATE (sock);
|
||
request_free (req);
|
||
return WARC_TMP_FOPENERR;
|
||
}
|
||
|
||
if (! proxy)
|
||
{
|
||
warc_ip = (ip_address *) alloca (sizeof (ip_address));
|
||
socket_ip_address (sock, warc_ip, ENDPOINT_PEER);
|
||
}
|
||
}
|
||
|
||
/* Send the request to server. */
|
||
write_error = request_send (req, sock, warc_tmp);
|
||
|
||
if (write_error >= 0)
|
||
{
|
||
if (opt.post_data)
|
||
{
|
||
DEBUGP (("[POST data: %s]\n", opt.post_data));
|
||
write_error = fd_write (sock, opt.post_data, post_data_size, -1);
|
||
if (write_error >= 0 && warc_tmp != NULL)
|
||
{
|
||
/* Remember end of headers / start of payload. */
|
||
warc_payload_offset = ftello (warc_tmp);
|
||
|
||
/* Write a copy of the data to the WARC record. */
|
||
int warc_tmp_written = fwrite (opt.post_data, 1, post_data_size, warc_tmp);
|
||
if (warc_tmp_written != post_data_size)
|
||
write_error = -2;
|
||
}
|
||
}
|
||
else if (opt.post_file_name && post_data_size != 0)
|
||
{
|
||
if (warc_tmp != NULL)
|
||
/* Remember end of headers / start of payload. */
|
||
warc_payload_offset = ftello (warc_tmp);
|
||
|
||
write_error = post_file (sock, opt.post_file_name, post_data_size, warc_tmp);
|
||
}
|
||
}
|
||
|
||
if (write_error < 0)
|
||
{
|
||
CLOSE_INVALIDATE (sock);
|
||
request_free (req);
|
||
|
||
if (warc_tmp != NULL)
|
||
fclose (warc_tmp);
|
||
|
||
if (write_error == -2)
|
||
return WARC_TMP_FWRITEERR;
|
||
else
|
||
return WRITEFAILED;
|
||
}
|
||
logprintf (LOG_VERBOSE, _("%s request sent, awaiting response... "),
|
||
proxy ? "Proxy" : "HTTP");
|
||
contlen = -1;
|
||
contrange = 0;
|
||
*dt &= ~RETROKF;
|
||
|
||
|
||
if (warc_enabled)
|
||
{
|
||
bool warc_result;
|
||
/* Generate a timestamp and uuid for this request. */
|
||
warc_timestamp (warc_timestamp_str);
|
||
warc_uuid_str (warc_request_uuid);
|
||
|
||
/* Create a request record and store it in the WARC file. */
|
||
warc_result = warc_write_request_record (u->url, warc_timestamp_str,
|
||
warc_request_uuid, warc_ip,
|
||
warc_tmp, warc_payload_offset);
|
||
if (! warc_result)
|
||
{
|
||
CLOSE_INVALIDATE (sock);
|
||
request_free (req);
|
||
return WARC_ERR;
|
||
}
|
||
|
||
/* warc_write_request_record has also closed warc_tmp. */
|
||
}
|
||
|
||
|
||
read_header:
|
||
head = read_http_response_head (sock);
|
||
if (!head)
|
||
{
|
||
if (errno == 0)
|
||
{
|
||
logputs (LOG_NOTQUIET, _("No data received.\n"));
|
||
CLOSE_INVALIDATE (sock);
|
||
request_free (req);
|
||
return HEOF;
|
||
}
|
||
else
|
||
{
|
||
logprintf (LOG_NOTQUIET, _("Read error (%s) in headers.\n"),
|
||
fd_errstr (sock));
|
||
CLOSE_INVALIDATE (sock);
|
||
request_free (req);
|
||
return HERR;
|
||
}
|
||
}
|
||
DEBUGP (("\n---response begin---\n%s---response end---\n", head));
|
||
|
||
resp = resp_new (head);
|
||
|
||
/* Check for status line. */
|
||
message = NULL;
|
||
statcode = resp_status (resp, &message);
|
||
if (statcode < 0)
|
||
{
|
||
char *tms = datetime_str (time (NULL));
|
||
logprintf (LOG_VERBOSE, "%d\n", statcode);
|
||
logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"), tms, statcode,
|
||
quotearg_style (escape_quoting_style,
|
||
_("Malformed status line")));
|
||
CLOSE_INVALIDATE (sock);
|
||
resp_free (resp);
|
||
request_free (req);
|
||
xfree (head);
|
||
return HERR;
|
||
}
|
||
|
||
if (H_10X (statcode))
|
||
{
|
||
DEBUGP (("Ignoring response\n"));
|
||
resp_free (resp);
|
||
xfree (head);
|
||
goto read_header;
|
||
}
|
||
|
||
hs->message = xstrdup (message);
|
||
if (!opt.server_response)
|
||
logprintf (LOG_VERBOSE, "%2d %s\n", statcode,
|
||
message ? quotearg_style (escape_quoting_style, message) : "");
|
||
else
|
||
{
|
||
logprintf (LOG_VERBOSE, "\n");
|
||
print_server_response (resp, " ");
|
||
}
|
||
|
||
if (!opt.ignore_length
|
||
&& resp_header_copy (resp, "Content-Length", hdrval, sizeof (hdrval)))
|
||
{
|
||
wgint parsed;
|
||
errno = 0;
|
||
parsed = str_to_wgint (hdrval, NULL, 10);
|
||
if (parsed == WGINT_MAX && errno == ERANGE)
|
||
{
|
||
/* Out of range.
|
||
#### If Content-Length is out of range, it most likely
|
||
means that the file is larger than 2G and that we're
|
||
compiled without LFS. In that case we should probably
|
||
refuse to even attempt to download the file. */
|
||
contlen = -1;
|
||
}
|
||
else if (parsed < 0)
|
||
{
|
||
/* Negative Content-Length; nonsensical, so we can't
|
||
assume any information about the content to receive. */
|
||
contlen = -1;
|
||
}
|
||
else
|
||
contlen = parsed;
|
||
}
|
||
|
||
/* Check for keep-alive related responses. */
|
||
if (!inhibit_keep_alive && contlen != -1)
|
||
{
|
||
if (resp_header_copy (resp, "Connection", hdrval, sizeof (hdrval)))
|
||
{
|
||
if (0 == strcasecmp (hdrval, "Close"))
|
||
keep_alive = false;
|
||
}
|
||
}
|
||
|
||
chunked_transfer_encoding = false;
|
||
if (resp_header_copy (resp, "Transfer-Encoding", hdrval, sizeof (hdrval))
|
||
&& 0 == strcasecmp (hdrval, "chunked"))
|
||
chunked_transfer_encoding = true;
|
||
|
||
/* Handle (possibly multiple instances of) the Set-Cookie header. */
|
||
if (opt.cookies)
|
||
{
|
||
int scpos;
|
||
const char *scbeg, *scend;
|
||
/* The jar should have been created by now. */
|
||
assert (wget_cookie_jar != NULL);
|
||
for (scpos = 0;
|
||
(scpos = resp_header_locate (resp, "Set-Cookie", scpos,
|
||
&scbeg, &scend)) != -1;
|
||
++scpos)
|
||
{
|
||
char *set_cookie; BOUNDED_TO_ALLOCA (scbeg, scend, set_cookie);
|
||
cookie_handle_set_cookie (wget_cookie_jar, u->host, u->port,
|
||
u->path, set_cookie);
|
||
}
|
||
}
|
||
|
||
if (keep_alive)
|
||
/* The server has promised that it will not close the connection
|
||
when we're done. This means that we can register it. */
|
||
register_persistent (conn->host, conn->port, sock, using_ssl);
|
||
|
||
if (statcode == HTTP_STATUS_UNAUTHORIZED)
|
||
{
|
||
/* Authorization is required. */
|
||
|
||
/* Normally we are not interested in the response body.
|
||
But if we are writing a WARC file we are: we like to keep everyting. */
|
||
if (warc_enabled)
|
||
{
|
||
int err;
|
||
type = resp_header_strdup (resp, "Content-Type");
|
||
err = read_response_body (hs, sock, NULL, contlen, 0,
|
||
chunked_transfer_encoding,
|
||
u->url, warc_timestamp_str,
|
||
warc_request_uuid, warc_ip, type,
|
||
statcode, head);
|
||
xfree_null (type);
|
||
|
||
if (err != RETRFINISHED || hs->res < 0)
|
||
{
|
||
CLOSE_INVALIDATE (sock);
|
||
request_free (req);
|
||
xfree_null (message);
|
||
resp_free (resp);
|
||
xfree (head);
|
||
return err;
|
||
}
|
||
else
|
||
CLOSE_FINISH (sock);
|
||
}
|
||
else
|
||
{
|
||
/* Since WARC is disabled, we are not interested in the response body. */
|
||
if (keep_alive && !head_only
|
||
&& skip_short_body (sock, contlen, chunked_transfer_encoding))
|
||
CLOSE_FINISH (sock);
|
||
else
|
||
CLOSE_INVALIDATE (sock);
|
||
}
|
||
|
||
pconn.authorized = false;
|
||
if (!auth_finished && (user && passwd))
|
||
{
|
||
/* IIS sends multiple copies of WWW-Authenticate, one with
|
||
the value "negotiate", and other(s) with data. Loop over
|
||
all the occurrences and pick the one we recognize. */
|
||
int wapos;
|
||
const char *wabeg, *waend;
|
||
char *www_authenticate = NULL;
|
||
for (wapos = 0;
|
||
(wapos = resp_header_locate (resp, "WWW-Authenticate", wapos,
|
||
&wabeg, &waend)) != -1;
|
||
++wapos)
|
||
if (known_authentication_scheme_p (wabeg, waend))
|
||
{
|
||
BOUNDED_TO_ALLOCA (wabeg, waend, www_authenticate);
|
||
break;
|
||
}
|
||
|
||
if (!www_authenticate)
|
||
{
|
||
/* If the authentication header is missing or
|
||
unrecognized, there's no sense in retrying. */
|
||
logputs (LOG_NOTQUIET, _("Unknown authentication scheme.\n"));
|
||
}
|
||
else if (!basic_auth_finished
|
||
|| !BEGINS_WITH (www_authenticate, "Basic"))
|
||
{
|
||
char *pth;
|
||
pth = url_full_path (u);
|
||
request_set_header (req, "Authorization",
|
||
create_authorization_line (www_authenticate,
|
||
user, passwd,
|
||
request_method (req),
|
||
pth,
|
||
&auth_finished),
|
||
rel_value);
|
||
if (BEGINS_WITH (www_authenticate, "NTLM"))
|
||
ntlm_seen = true;
|
||
else if (!u->user && BEGINS_WITH (www_authenticate, "Basic"))
|
||
{
|
||
/* Need to register this host as using basic auth,
|
||
* so we automatically send creds next time. */
|
||
register_basic_auth_host (u->host);
|
||
}
|
||
xfree (pth);
|
||
xfree_null (message);
|
||
resp_free (resp);
|
||
xfree (head);
|
||
goto retry_with_auth;
|
||
}
|
||
else
|
||
{
|
||
/* We already did Basic auth, and it failed. Gotta
|
||
* give up. */
|
||
}
|
||
}
|
||
logputs (LOG_NOTQUIET, _("Authorization failed.\n"));
|
||
request_free (req);
|
||
xfree_null (message);
|
||
resp_free (resp);
|
||
xfree (head);
|
||
return AUTHFAILED;
|
||
}
|
||
else /* statcode != HTTP_STATUS_UNAUTHORIZED */
|
||
{
|
||
/* Kludge: if NTLM is used, mark the TCP connection as authorized. */
|
||
if (ntlm_seen)
|
||
pconn.authorized = true;
|
||
}
|
||
|
||
/* Determine the local filename if needed. Notice that if -O is used
|
||
* hstat.local_file is set by http_loop to the argument of -O. */
|
||
if (!hs->local_file)
|
||
{
|
||
char *local_file = NULL;
|
||
|
||
/* Honor Content-Disposition whether possible. */
|
||
if (!opt.content_disposition
|
||
|| !resp_header_copy (resp, "Content-Disposition",
|
||
hdrval, sizeof (hdrval))
|
||
|| !parse_content_disposition (hdrval, &local_file))
|
||
{
|
||
/* The Content-Disposition header is missing or broken.
|
||
* Choose unique file name according to given URL. */
|
||
hs->local_file = url_file_name (u, NULL);
|
||
}
|
||
else
|
||
{
|
||
DEBUGP (("Parsed filename from Content-Disposition: %s\n",
|
||
local_file));
|
||
hs->local_file = url_file_name (u, local_file);
|
||
}
|
||
}
|
||
|
||
/* TODO: perform this check only once. */
|
||
if (!hs->existence_checked && file_exists_p (hs->local_file))
|
||
{
|
||
if (opt.noclobber && !opt.output_document)
|
||
{
|
||
/* If opt.noclobber is turned on and file already exists, do not
|
||
retrieve the file. But if the output_document was given, then this
|
||
test was already done and the file didn't exist. Hence the !opt.output_document */
|
||
get_file_flags (hs->local_file, dt);
|
||
request_free (req);
|
||
resp_free (resp);
|
||
xfree (head);
|
||
xfree_null (message);
|
||
return RETRUNNEEDED;
|
||
}
|
||
else if (!ALLOW_CLOBBER)
|
||
{
|
||
char *unique = unique_name (hs->local_file, true);
|
||
if (unique != hs->local_file)
|
||
xfree (hs->local_file);
|
||
hs->local_file = unique;
|
||
}
|
||
}
|
||
hs->existence_checked = true;
|
||
|
||
/* Support timestamping */
|
||
/* TODO: move this code out of gethttp. */
|
||
if (opt.timestamping && !hs->timestamp_checked)
|
||
{
|
||
size_t filename_len = strlen (hs->local_file);
|
||
char *filename_plus_orig_suffix = alloca (filename_len + sizeof (ORIG_SFX));
|
||
bool local_dot_orig_file_exists = false;
|
||
char *local_filename = NULL;
|
||
struct_stat st;
|
||
|
||
if (opt.backup_converted)
|
||
/* If -K is specified, we'll act on the assumption that it was specified
|
||
last time these files were downloaded as well, and instead of just
|
||
comparing local file X against server file X, we'll compare local
|
||
file X.orig (if extant, else X) against server file X. If -K
|
||
_wasn't_ specified last time, or the server contains files called
|
||
*.orig, -N will be back to not operating correctly with -k. */
|
||
{
|
||
/* Would a single s[n]printf() call be faster? --dan
|
||
|
||
Definitely not. sprintf() is horribly slow. It's a
|
||
different question whether the difference between the two
|
||
affects a program. Usually I'd say "no", but at one
|
||
point I profiled Wget, and found that a measurable and
|
||
non-negligible amount of time was lost calling sprintf()
|
||
in url.c. Replacing sprintf with inline calls to
|
||
strcpy() and number_to_string() made a difference.
|
||
--hniksic */
|
||
memcpy (filename_plus_orig_suffix, hs->local_file, filename_len);
|
||
memcpy (filename_plus_orig_suffix + filename_len,
|
||
ORIG_SFX, sizeof (ORIG_SFX));
|
||
|
||
/* Try to stat() the .orig file. */
|
||
if (stat (filename_plus_orig_suffix, &st) == 0)
|
||
{
|
||
local_dot_orig_file_exists = true;
|
||
local_filename = filename_plus_orig_suffix;
|
||
}
|
||
}
|
||
|
||
if (!local_dot_orig_file_exists)
|
||
/* Couldn't stat() <file>.orig, so try to stat() <file>. */
|
||
if (stat (hs->local_file, &st) == 0)
|
||
local_filename = hs->local_file;
|
||
|
||
if (local_filename != NULL)
|
||
/* There was a local file, so we'll check later to see if the version
|
||
the server has is the same version we already have, allowing us to
|
||
skip a download. */
|
||
{
|
||
hs->orig_file_name = xstrdup (local_filename);
|
||
hs->orig_file_size = st.st_size;
|
||
hs->orig_file_tstamp = st.st_mtime;
|
||
#ifdef WINDOWS
|
||
/* Modification time granularity is 2 seconds for Windows, so
|
||
increase local time by 1 second for later comparison. */
|
||
++hs->orig_file_tstamp;
|
||
#endif
|
||
}
|
||
}
|
||
|
||
request_free (req);
|
||
|
||
hs->statcode = statcode;
|
||
if (statcode == -1)
|
||
hs->error = xstrdup (_("Malformed status line"));
|
||
else if (!*message)
|
||
hs->error = xstrdup (_("(no description)"));
|
||
else
|
||
hs->error = xstrdup (message);
|
||
xfree_null (message);
|
||
|
||
type = resp_header_strdup (resp, "Content-Type");
|
||
if (type)
|
||
{
|
||
char *tmp = strchr (type, ';');
|
||
if (tmp)
|
||
{
|
||
/* sXXXav: only needed if IRI support is enabled */
|
||
char *tmp2 = tmp + 1;
|
||
|
||
while (tmp > type && c_isspace (tmp[-1]))
|
||
--tmp;
|
||
*tmp = '\0';
|
||
|
||
/* Try to get remote encoding if needed */
|
||
if (opt.enable_iri && !opt.encoding_remote)
|
||
{
|
||
tmp = parse_charset (tmp2);
|
||
if (tmp)
|
||
set_content_encoding (iri, tmp);
|
||
}
|
||
}
|
||
}
|
||
hs->newloc = resp_header_strdup (resp, "Location");
|
||
hs->remote_time = resp_header_strdup (resp, "Last-Modified");
|
||
|
||
if (resp_header_copy (resp, "Content-Range", hdrval, sizeof (hdrval)))
|
||
{
|
||
wgint first_byte_pos, last_byte_pos, entity_length;
|
||
if (parse_content_range (hdrval, &first_byte_pos, &last_byte_pos,
|
||
&entity_length))
|
||
{
|
||
contrange = first_byte_pos;
|
||
contlen = last_byte_pos - first_byte_pos + 1;
|
||
}
|
||
}
|
||
resp_free (resp);
|
||
|
||
/* 20x responses are counted among successful by default. */
|
||
if (H_20X (statcode))
|
||
*dt |= RETROKF;
|
||
|
||
/* Return if redirected. */
|
||
if (H_REDIRECTED (statcode) || statcode == HTTP_STATUS_MULTIPLE_CHOICES)
|
||
{
|
||
/* RFC2068 says that in case of the 300 (multiple choices)
|
||
response, the server can output a preferred URL through
|
||
`Location' header; otherwise, the request should be treated
|
||
like GET. So, if the location is set, it will be a
|
||
redirection; otherwise, just proceed normally. */
|
||
if (statcode == HTTP_STATUS_MULTIPLE_CHOICES && !hs->newloc)
|
||
*dt |= RETROKF;
|
||
else
|
||
{
|
||
logprintf (LOG_VERBOSE,
|
||
_("Location: %s%s\n"),
|
||
hs->newloc ? escnonprint_uri (hs->newloc) : _("unspecified"),
|
||
hs->newloc ? _(" [following]") : "");
|
||
|
||
/* In case the caller cares to look... */
|
||
hs->len = 0;
|
||
hs->res = 0;
|
||
hs->restval = 0;
|
||
|
||
/* Normally we are not interested in the response body of a redirect.
|
||
But if we are writing a WARC file we are: we like to keep everyting. */
|
||
if (warc_enabled)
|
||
{
|
||
int err = read_response_body (hs, sock, NULL, contlen, 0,
|
||
chunked_transfer_encoding,
|
||
u->url, warc_timestamp_str,
|
||
warc_request_uuid, warc_ip, type,
|
||
statcode, head);
|
||
|
||
if (err != RETRFINISHED || hs->res < 0)
|
||
{
|
||
CLOSE_INVALIDATE (sock);
|
||
xfree_null (type);
|
||
xfree (head);
|
||
return err;
|
||
}
|
||
else
|
||
CLOSE_FINISH (sock);
|
||
}
|
||
else
|
||
{
|
||
/* Since WARC is disabled, we are not interested in the response body. */
|
||
if (keep_alive && !head_only
|
||
&& skip_short_body (sock, contlen, chunked_transfer_encoding))
|
||
CLOSE_FINISH (sock);
|
||
else
|
||
CLOSE_INVALIDATE (sock);
|
||
}
|
||
|
||
xfree_null (type);
|
||
xfree (head);
|
||
/* From RFC2616: The status codes 303 and 307 have
|
||
been added for servers that wish to make unambiguously
|
||
clear which kind of reaction is expected of the client.
|
||
|
||
A 307 should be redirected using the same method,
|
||
in other words, a POST should be preserved and not
|
||
converted to a GET in that case. */
|
||
if (statcode == HTTP_STATUS_TEMPORARY_REDIRECT)
|
||
return NEWLOCATION_KEEP_POST;
|
||
return NEWLOCATION;
|
||
}
|
||
}
|
||
|
||
/* If content-type is not given, assume text/html. This is because
|
||
of the multitude of broken CGI's that "forget" to generate the
|
||
content-type. */
|
||
if (!type ||
|
||
0 == strncasecmp (type, TEXTHTML_S, strlen (TEXTHTML_S)) ||
|
||
0 == strncasecmp (type, TEXTXHTML_S, strlen (TEXTXHTML_S)))
|
||
*dt |= TEXTHTML;
|
||
else
|
||
*dt &= ~TEXTHTML;
|
||
|
||
if (type &&
|
||
0 == strncasecmp (type, TEXTCSS_S, strlen (TEXTCSS_S)))
|
||
*dt |= TEXTCSS;
|
||
else
|
||
*dt &= ~TEXTCSS;
|
||
|
||
if (opt.adjust_extension)
|
||
{
|
||
if (*dt & TEXTHTML)
|
||
/* -E / --adjust-extension / adjust_extension = on was specified,
|
||
and this is a text/html file. If some case-insensitive
|
||
variation on ".htm[l]" isn't already the file's suffix,
|
||
tack on ".html". */
|
||
{
|
||
ensure_extension (hs, ".html", dt);
|
||
}
|
||
else if (*dt & TEXTCSS)
|
||
{
|
||
ensure_extension (hs, ".css", dt);
|
||
}
|
||
}
|
||
|
||
if (statcode == HTTP_STATUS_RANGE_NOT_SATISFIABLE
|
||
|| (!opt.timestamping && hs->restval > 0 && statcode == HTTP_STATUS_OK
|
||
&& contrange == 0 && contlen >= 0 && hs->restval >= contlen))
|
||
{
|
||
/* If `-c' is in use and the file has been fully downloaded (or
|
||
the remote file has shrunk), Wget effectively requests bytes
|
||
after the end of file and the server response with 416
|
||
(or 200 with a <= Content-Length. */
|
||
logputs (LOG_VERBOSE, _("\
|
||
\n The file is already fully retrieved; nothing to do.\n\n"));
|
||
/* In case the caller inspects. */
|
||
hs->len = contlen;
|
||
hs->res = 0;
|
||
/* Mark as successfully retrieved. */
|
||
*dt |= RETROKF;
|
||
xfree_null (type);
|
||
CLOSE_INVALIDATE (sock); /* would be CLOSE_FINISH, but there
|
||
might be more bytes in the body. */
|
||
xfree (head);
|
||
return RETRUNNEEDED;
|
||
}
|
||
if ((contrange != 0 && contrange != hs->restval)
|
||
|| (H_PARTIAL (statcode) && !contrange))
|
||
{
|
||
/* The Range request was somehow misunderstood by the server.
|
||
Bail out. */
|
||
xfree_null (type);
|
||
CLOSE_INVALIDATE (sock);
|
||
xfree (head);
|
||
return RANGEERR;
|
||
}
|
||
if (contlen == -1)
|
||
hs->contlen = -1;
|
||
else
|
||
hs->contlen = contlen + contrange;
|
||
|
||
if (opt.verbose)
|
||
{
|
||
if (*dt & RETROKF)
|
||
{
|
||
/* No need to print this output if the body won't be
|
||
downloaded at all, or if the original server response is
|
||
printed. */
|
||
logputs (LOG_VERBOSE, _("Length: "));
|
||
if (contlen != -1)
|
||
{
|
||
logputs (LOG_VERBOSE, number_to_static_string (contlen + contrange));
|
||
if (contlen + contrange >= 1024)
|
||
logprintf (LOG_VERBOSE, " (%s)",
|
||
human_readable (contlen + contrange));
|
||
if (contrange)
|
||
{
|
||
if (contlen >= 1024)
|
||
logprintf (LOG_VERBOSE, _(", %s (%s) remaining"),
|
||
number_to_static_string (contlen),
|
||
human_readable (contlen));
|
||
else
|
||
logprintf (LOG_VERBOSE, _(", %s remaining"),
|
||
number_to_static_string (contlen));
|
||
}
|
||
}
|
||
else
|
||
logputs (LOG_VERBOSE,
|
||
opt.ignore_length ? _("ignored") : _("unspecified"));
|
||
if (type)
|
||
logprintf (LOG_VERBOSE, " [%s]\n", quotearg_style (escape_quoting_style, type));
|
||
else
|
||
logputs (LOG_VERBOSE, "\n");
|
||
}
|
||
}
|
||
|
||
/* Return if we have no intention of further downloading. */
|
||
if ((!(*dt & RETROKF) && !opt.content_on_error) || head_only)
|
||
{
|
||
/* In case the caller cares to look... */
|
||
hs->len = 0;
|
||
hs->res = 0;
|
||
hs->restval = 0;
|
||
|
||
/* Normally we are not interested in the response body of a error responses.
|
||
But if we are writing a WARC file we are: we like to keep everyting. */
|
||
if (warc_enabled)
|
||
{
|
||
int err = read_response_body (hs, sock, NULL, contlen, 0,
|
||
chunked_transfer_encoding,
|
||
u->url, warc_timestamp_str,
|
||
warc_request_uuid, warc_ip, type,
|
||
statcode, head);
|
||
|
||
if (err != RETRFINISHED || hs->res < 0)
|
||
{
|
||
CLOSE_INVALIDATE (sock);
|
||
xfree (head);
|
||
xfree_null (type);
|
||
return err;
|
||
}
|
||
else
|
||
CLOSE_FINISH (sock);
|
||
}
|
||
else
|
||
{
|
||
/* Since WARC is disabled, we are not interested in the response body. */
|
||
if (head_only)
|
||
/* Pre-1.10 Wget used CLOSE_INVALIDATE here. Now we trust the
|
||
servers not to send body in response to a HEAD request, and
|
||
those that do will likely be caught by test_socket_open.
|
||
If not, they can be worked around using
|
||
`--no-http-keep-alive'. */
|
||
CLOSE_FINISH (sock);
|
||
else if (keep_alive
|
||
&& skip_short_body (sock, contlen, chunked_transfer_encoding))
|
||
/* Successfully skipped the body; also keep using the socket. */
|
||
CLOSE_FINISH (sock);
|
||
else
|
||
CLOSE_INVALIDATE (sock);
|
||
}
|
||
|
||
xfree (head);
|
||
xfree_null (type);
|
||
return RETRFINISHED;
|
||
}
|
||
|
||
/* 2005-06-17 SMS.
|
||
For VMS, define common fopen() optional arguments.
|
||
*/
|
||
#ifdef __VMS
|
||
# define FOPEN_OPT_ARGS "fop=sqo", "acc", acc_cb, &open_id
|
||
# define FOPEN_BIN_FLAG 3
|
||
#else /* def __VMS */
|
||
# define FOPEN_BIN_FLAG true
|
||
#endif /* def __VMS [else] */
|
||
|
||
/* Open the local file. */
|
||
if (!output_stream)
|
||
{
|
||
mkalldirs (hs->local_file);
|
||
if (opt.backups)
|
||
rotate_backups (hs->local_file);
|
||
if (hs->restval)
|
||
{
|
||
#ifdef __VMS
|
||
int open_id;
|
||
|
||
open_id = 21;
|
||
fp = fopen (hs->local_file, "ab", FOPEN_OPT_ARGS);
|
||
#else /* def __VMS */
|
||
fp = fopen (hs->local_file, "ab");
|
||
#endif /* def __VMS [else] */
|
||
}
|
||
else if (ALLOW_CLOBBER || count > 0)
|
||
{
|
||
if (opt.unlink && file_exists_p (hs->local_file))
|
||
{
|
||
int res = unlink (hs->local_file);
|
||
if (res < 0)
|
||
{
|
||
logprintf (LOG_NOTQUIET, "%s: %s\n", hs->local_file,
|
||
strerror (errno));
|
||
CLOSE_INVALIDATE (sock);
|
||
xfree (head);
|
||
xfree_null (type);
|
||
return UNLINKERR;
|
||
}
|
||
}
|
||
|
||
#ifdef __VMS
|
||
int open_id;
|
||
|
||
open_id = 22;
|
||
fp = fopen (hs->local_file, "wb", FOPEN_OPT_ARGS);
|
||
#else /* def __VMS */
|
||
fp = fopen (hs->local_file, "wb");
|
||
#endif /* def __VMS [else] */
|
||
}
|
||
else
|
||
{
|
||
fp = fopen_excl (hs->local_file, FOPEN_BIN_FLAG);
|
||
if (!fp && errno == EEXIST)
|
||
{
|
||
/* We cannot just invent a new name and use it (which is
|
||
what functions like unique_create typically do)
|
||
because we told the user we'd use this name.
|
||
Instead, return and retry the download. */
|
||
logprintf (LOG_NOTQUIET,
|
||
_("%s has sprung into existence.\n"),
|
||
hs->local_file);
|
||
CLOSE_INVALIDATE (sock);
|
||
xfree (head);
|
||
xfree_null (type);
|
||
return FOPEN_EXCL_ERR;
|
||
}
|
||
}
|
||
if (!fp)
|
||
{
|
||
logprintf (LOG_NOTQUIET, "%s: %s\n", hs->local_file, strerror (errno));
|
||
CLOSE_INVALIDATE (sock);
|
||
xfree (head);
|
||
xfree_null (type);
|
||
return FOPENERR;
|
||
}
|
||
}
|
||
else
|
||
fp = output_stream;
|
||
|
||
/* Print fetch message, if opt.verbose. */
|
||
if (opt.verbose)
|
||
{
|
||
logprintf (LOG_NOTQUIET, _("Saving to: %s\n"),
|
||
HYPHENP (hs->local_file) ? quote ("STDOUT") : quote (hs->local_file));
|
||
}
|
||
|
||
|
||
err = read_response_body (hs, sock, fp, contlen, contrange,
|
||
chunked_transfer_encoding,
|
||
u->url, warc_timestamp_str,
|
||
warc_request_uuid, warc_ip, type,
|
||
statcode, head);
|
||
|
||
/* Now we no longer need to store the response header. */
|
||
xfree (head);
|
||
xfree_null (type);
|
||
|
||
if (hs->res >= 0)
|
||
CLOSE_FINISH (sock);
|
||
else
|
||
CLOSE_INVALIDATE (sock);
|
||
|
||
if (!output_stream)
|
||
fclose (fp);
|
||
|
||
return err;
|
||
}
|
||
|
||
/* The genuine HTTP loop! This is the part where the retrieval is
|
||
retried, and retried, and retried, and... */
|
||
uerr_t
|
||
http_loop (struct url *u, struct url *original_url, char **newloc,
|
||
char **local_file, const char *referer, int *dt, struct url *proxy,
|
||
struct iri *iri)
|
||
{
|
||
int count;
|
||
bool got_head = false; /* used for time-stamping and filename detection */
|
||
bool time_came_from_head = false;
|
||
bool got_name = false;
|
||
char *tms;
|
||
const char *tmrate;
|
||
uerr_t err, ret = TRYLIMEXC;
|
||
time_t tmr = -1; /* remote time-stamp */
|
||
struct http_stat hstat; /* HTTP status */
|
||
struct_stat st;
|
||
bool send_head_first = true;
|
||
char *file_name;
|
||
bool force_full_retrieve = false;
|
||
|
||
|
||
/* If we are writing to a WARC file: always retrieve the whole file. */
|
||
if (opt.warc_filename != NULL)
|
||
force_full_retrieve = true;
|
||
|
||
|
||
/* Assert that no value for *LOCAL_FILE was passed. */
|
||
assert (local_file == NULL || *local_file == NULL);
|
||
|
||
/* Set LOCAL_FILE parameter. */
|
||
if (local_file && opt.output_document)
|
||
*local_file = HYPHENP (opt.output_document) ? NULL : xstrdup (opt.output_document);
|
||
|
||
/* Reset NEWLOC parameter. */
|
||
*newloc = NULL;
|
||
|
||
/* This used to be done in main(), but it's a better idea to do it
|
||
here so that we don't go through the hoops if we're just using
|
||
FTP or whatever. */
|
||
if (opt.cookies)
|
||
load_cookies ();
|
||
|
||
/* Warn on (likely bogus) wildcard usage in HTTP. */
|
||
if (opt.ftp_glob && has_wildcards_p (u->path))
|
||
logputs (LOG_VERBOSE, _("Warning: wildcards not supported in HTTP.\n"));
|
||
|
||
/* Setup hstat struct. */
|
||
xzero (hstat);
|
||
hstat.referer = referer;
|
||
|
||
if (opt.output_document)
|
||
{
|
||
hstat.local_file = xstrdup (opt.output_document);
|
||
got_name = true;
|
||
}
|
||
else if (!opt.content_disposition)
|
||
{
|
||
hstat.local_file =
|
||
url_file_name (opt.trustservernames ? u : original_url, NULL);
|
||
got_name = true;
|
||
}
|
||
|
||
if (got_name && file_exists_p (hstat.local_file) && opt.noclobber && !opt.output_document)
|
||
{
|
||
/* If opt.noclobber is turned on and file already exists, do not
|
||
retrieve the file. But if the output_document was given, then this
|
||
test was already done and the file didn't exist. Hence the !opt.output_document */
|
||
get_file_flags (hstat.local_file, dt);
|
||
ret = RETROK;
|
||
goto exit;
|
||
}
|
||
|
||
/* Reset the counter. */
|
||
count = 0;
|
||
|
||
/* Reset the document type. */
|
||
*dt = 0;
|
||
|
||
/* Skip preliminary HEAD request if we're not in spider mode. */
|
||
if (!opt.spider)
|
||
send_head_first = false;
|
||
|
||
/* Send preliminary HEAD request if -N is given and we have an existing
|
||
* destination file. */
|
||
file_name = url_file_name (opt.trustservernames ? u : original_url, NULL);
|
||
if (opt.timestamping && (file_exists_p (file_name)
|
||
|| opt.content_disposition))
|
||
send_head_first = true;
|
||
xfree (file_name);
|
||
|
||
/* THE loop */
|
||
do
|
||
{
|
||
/* Increment the pass counter. */
|
||
++count;
|
||
sleep_between_retrievals (count);
|
||
|
||
/* Get the current time string. */
|
||
tms = datetime_str (time (NULL));
|
||
|
||
if (opt.spider && !got_head)
|
||
logprintf (LOG_VERBOSE, _("\
|
||
Spider mode enabled. Check if remote file exists.\n"));
|
||
|
||
/* Print fetch message, if opt.verbose. */
|
||
if (opt.verbose)
|
||
{
|
||
char *hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
|
||
|
||
if (count > 1)
|
||
{
|
||
char tmp[256];
|
||
sprintf (tmp, _("(try:%2d)"), count);
|
||
logprintf (LOG_NOTQUIET, "--%s-- %s %s\n",
|
||
tms, tmp, hurl);
|
||
}
|
||
else
|
||
{
|
||
logprintf (LOG_NOTQUIET, "--%s-- %s\n",
|
||
tms, hurl);
|
||
}
|
||
|
||
#ifdef WINDOWS
|
||
ws_changetitle (hurl);
|
||
#endif
|
||
xfree (hurl);
|
||
}
|
||
|
||
/* Default document type is empty. However, if spider mode is
|
||
on or time-stamping is employed, HEAD_ONLY commands is
|
||
encoded within *dt. */
|
||
if (send_head_first && !got_head)
|
||
*dt |= HEAD_ONLY;
|
||
else
|
||
*dt &= ~HEAD_ONLY;
|
||
|
||
/* Decide whether or not to restart. */
|
||
if (force_full_retrieve)
|
||
hstat.restval = hstat.len;
|
||
else if (opt.always_rest
|
||
&& got_name
|
||
&& stat (hstat.local_file, &st) == 0
|
||
&& S_ISREG (st.st_mode))
|
||
/* When -c is used, continue from on-disk size. (Can't use
|
||
hstat.len even if count>1 because we don't want a failed
|
||
first attempt to clobber existing data.) */
|
||
hstat.restval = st.st_size;
|
||
else if (count > 1)
|
||
/* otherwise, continue where the previous try left off */
|
||
hstat.restval = hstat.len;
|
||
else
|
||
hstat.restval = 0;
|
||
|
||
/* Decide whether to send the no-cache directive. We send it in
|
||
two cases:
|
||
a) we're using a proxy, and we're past our first retrieval.
|
||
Some proxies are notorious for caching incomplete data, so
|
||
we require a fresh get.
|
||
b) caching is explicitly inhibited. */
|
||
if ((proxy && count > 1) /* a */
|
||
|| !opt.allow_cache) /* b */
|
||
*dt |= SEND_NOCACHE;
|
||
else
|
||
*dt &= ~SEND_NOCACHE;
|
||
|
||
/* Try fetching the document, or at least its head. */
|
||
err = gethttp (u, &hstat, dt, proxy, iri, count);
|
||
|
||
/* Time? */
|
||
tms = datetime_str (time (NULL));
|
||
|
||
/* Get the new location (with or without the redirection). */
|
||
if (hstat.newloc)
|
||
*newloc = xstrdup (hstat.newloc);
|
||
|
||
switch (err)
|
||
{
|
||
case HERR: case HEOF: case CONSOCKERR: case CONCLOSED:
|
||
case CONERROR: case READERR: case WRITEFAILED:
|
||
case RANGEERR: case FOPEN_EXCL_ERR:
|
||
/* Non-fatal errors continue executing the loop, which will
|
||
bring them to "while" statement at the end, to judge
|
||
whether the number of tries was exceeded. */
|
||
printwhat (count, opt.ntry);
|
||
continue;
|
||
case FWRITEERR: case FOPENERR:
|
||
/* Another fatal error. */
|
||
logputs (LOG_VERBOSE, "\n");
|
||
logprintf (LOG_NOTQUIET, _("Cannot write to %s (%s).\n"),
|
||
quote (hstat.local_file), strerror (errno));
|
||
case HOSTERR: case CONIMPOSSIBLE: case PROXERR: case AUTHFAILED:
|
||
case SSLINITFAILED: case CONTNOTSUPPORTED: case VERIFCERTERR:
|
||
/* Fatal errors just return from the function. */
|
||
ret = err;
|
||
goto exit;
|
||
case WARC_ERR:
|
||
/* A fatal WARC error. */
|
||
logputs (LOG_VERBOSE, "\n");
|
||
logprintf (LOG_NOTQUIET, _("Cannot write to WARC file..\n"));
|
||
ret = err;
|
||
goto exit;
|
||
case WARC_TMP_FOPENERR: case WARC_TMP_FWRITEERR:
|
||
/* A fatal WARC error. */
|
||
logputs (LOG_VERBOSE, "\n");
|
||
logprintf (LOG_NOTQUIET, _("Cannot write to temporary WARC file.\n"));
|
||
ret = err;
|
||
goto exit;
|
||
case CONSSLERR:
|
||
/* Another fatal error. */
|
||
logprintf (LOG_NOTQUIET, _("Unable to establish SSL connection.\n"));
|
||
ret = err;
|
||
goto exit;
|
||
case UNLINKERR:
|
||
/* Another fatal error. */
|
||
logputs (LOG_VERBOSE, "\n");
|
||
logprintf (LOG_NOTQUIET, _("Cannot unlink %s (%s).\n"),
|
||
quote (hstat.local_file), strerror (errno));
|
||
ret = err;
|
||
goto exit;
|
||
case NEWLOCATION:
|
||
case NEWLOCATION_KEEP_POST:
|
||
/* Return the new location to the caller. */
|
||
if (!*newloc)
|
||
{
|
||
logprintf (LOG_NOTQUIET,
|
||
_("ERROR: Redirection (%d) without location.\n"),
|
||
hstat.statcode);
|
||
ret = WRONGCODE;
|
||
}
|
||
else
|
||
{
|
||
ret = err;
|
||
}
|
||
goto exit;
|
||
case RETRUNNEEDED:
|
||
/* The file was already fully retrieved. */
|
||
ret = RETROK;
|
||
goto exit;
|
||
case RETRFINISHED:
|
||
/* Deal with you later. */
|
||
break;
|
||
default:
|
||
/* All possibilities should have been exhausted. */
|
||
abort ();
|
||
}
|
||
|
||
if (!(*dt & RETROKF))
|
||
{
|
||
char *hurl = NULL;
|
||
if (!opt.verbose)
|
||
{
|
||
/* #### Ugly ugly ugly! */
|
||
hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
|
||
logprintf (LOG_NONVERBOSE, "%s:\n", hurl);
|
||
}
|
||
|
||
/* Fall back to GET if HEAD fails with a 500 or 501 error code. */
|
||
if (*dt & HEAD_ONLY
|
||
&& (hstat.statcode == 500 || hstat.statcode == 501))
|
||
{
|
||
got_head = true;
|
||
continue;
|
||
}
|
||
/* Maybe we should always keep track of broken links, not just in
|
||
* spider mode.
|
||
* Don't log error if it was UTF-8 encoded because we will try
|
||
* once unencoded. */
|
||
else if (opt.spider && !iri->utf8_encode)
|
||
{
|
||
/* #### Again: ugly ugly ugly! */
|
||
if (!hurl)
|
||
hurl = url_string (u, URL_AUTH_HIDE_PASSWD);
|
||
nonexisting_url (hurl);
|
||
logprintf (LOG_NOTQUIET, _("\
|
||
Remote file does not exist -- broken link!!!\n"));
|
||
}
|
||
else
|
||
{
|
||
logprintf (LOG_NOTQUIET, _("%s ERROR %d: %s.\n"),
|
||
tms, hstat.statcode,
|
||
quotearg_style (escape_quoting_style, hstat.error));
|
||
}
|
||
logputs (LOG_VERBOSE, "\n");
|
||
ret = WRONGCODE;
|
||
xfree_null (hurl);
|
||
goto exit;
|
||
}
|
||
|
||
/* Did we get the time-stamp? */
|
||
if (!got_head)
|
||
{
|
||
got_head = true; /* no more time-stamping */
|
||
|
||
if (opt.timestamping && !hstat.remote_time)
|
||
{
|
||
logputs (LOG_NOTQUIET, _("\
|
||
Last-modified header missing -- time-stamps turned off.\n"));
|
||
}
|
||
else if (hstat.remote_time)
|
||
{
|
||
/* Convert the date-string into struct tm. */
|
||
tmr = http_atotm (hstat.remote_time);
|
||
if (tmr == (time_t) (-1))
|
||
logputs (LOG_VERBOSE, _("\
|
||
Last-modified header invalid -- time-stamp ignored.\n"));
|
||
if (*dt & HEAD_ONLY)
|
||
time_came_from_head = true;
|
||
}
|
||
|
||
if (send_head_first)
|
||
{
|
||
/* The time-stamping section. */
|
||
if (opt.timestamping)
|
||
{
|
||
if (hstat.orig_file_name) /* Perform the following
|
||
checks only if the file
|
||
we're supposed to
|
||
download already exists. */
|
||
{
|
||
if (hstat.remote_time &&
|
||
tmr != (time_t) (-1))
|
||
{
|
||
/* Now time-stamping can be used validly.
|
||
Time-stamping means that if the sizes of
|
||
the local and remote file match, and local
|
||
file is newer than the remote file, it will
|
||
not be retrieved. Otherwise, the normal
|
||
download procedure is resumed. */
|
||
if (hstat.orig_file_tstamp >= tmr)
|
||
{
|
||
if (hstat.contlen == -1
|
||
|| hstat.orig_file_size == hstat.contlen)
|
||
{
|
||
logprintf (LOG_VERBOSE, _("\
|
||
Server file no newer than local file %s -- not retrieving.\n\n"),
|
||
quote (hstat.orig_file_name));
|
||
ret = RETROK;
|
||
goto exit;
|
||
}
|
||
else
|
||
{
|
||
logprintf (LOG_VERBOSE, _("\
|
||
The sizes do not match (local %s) -- retrieving.\n"),
|
||
number_to_static_string (hstat.orig_file_size));
|
||
}
|
||
}
|
||
else
|
||
{
|
||
force_full_retrieve = true;
|
||
logputs (LOG_VERBOSE,
|
||
_("Remote file is newer, retrieving.\n"));
|
||
}
|
||
|
||
logputs (LOG_VERBOSE, "\n");
|
||
}
|
||
}
|
||
|
||
/* free_hstat (&hstat); */
|
||
hstat.timestamp_checked = true;
|
||
}
|
||
|
||
if (opt.spider)
|
||
{
|
||
bool finished = true;
|
||
if (opt.recursive)
|
||
{
|
||
if (*dt & TEXTHTML)
|
||
{
|
||
logputs (LOG_VERBOSE, _("\
|
||
Remote file exists and could contain links to other resources -- retrieving.\n\n"));
|
||
finished = false;
|
||
}
|
||
else
|
||
{
|
||
logprintf (LOG_VERBOSE, _("\
|
||
Remote file exists but does not contain any link -- not retrieving.\n\n"));
|
||
ret = RETROK; /* RETRUNNEEDED is not for caller. */
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (*dt & TEXTHTML)
|
||
{
|
||
logprintf (LOG_VERBOSE, _("\
|
||
Remote file exists and could contain further links,\n\
|
||
but recursion is disabled -- not retrieving.\n\n"));
|
||
}
|
||
else
|
||
{
|
||
logprintf (LOG_VERBOSE, _("\
|
||
Remote file exists.\n\n"));
|
||
}
|
||
ret = RETROK; /* RETRUNNEEDED is not for caller. */
|
||
}
|
||
|
||
if (finished)
|
||
{
|
||
logprintf (LOG_NONVERBOSE,
|
||
_("%s URL: %s %2d %s\n"),
|
||
tms, u->url, hstat.statcode,
|
||
hstat.message ? quotearg_style (escape_quoting_style, hstat.message) : "");
|
||
goto exit;
|
||
}
|
||
}
|
||
|
||
got_name = true;
|
||
*dt &= ~HEAD_ONLY;
|
||
count = 0; /* the retrieve count for HEAD is reset */
|
||
continue;
|
||
} /* send_head_first */
|
||
} /* !got_head */
|
||
|
||
if (opt.useservertimestamps
|
||
&& (tmr != (time_t) (-1))
|
||
&& ((hstat.len == hstat.contlen) ||
|
||
((hstat.res == 0) && (hstat.contlen == -1))))
|
||
{
|
||
const char *fl = NULL;
|
||
set_local_file (&fl, hstat.local_file);
|
||
if (fl)
|
||
{
|
||
time_t newtmr = -1;
|
||
/* Reparse time header, in case it's changed. */
|
||
if (time_came_from_head
|
||
&& hstat.remote_time && hstat.remote_time[0])
|
||
{
|
||
newtmr = http_atotm (hstat.remote_time);
|
||
if (newtmr != (time_t)-1)
|
||
tmr = newtmr;
|
||
}
|
||
touch (fl, tmr);
|
||
}
|
||
}
|
||
/* End of time-stamping section. */
|
||
|
||
tmrate = retr_rate (hstat.rd_size, hstat.dltime);
|
||
total_download_time += hstat.dltime;
|
||
|
||
if (hstat.len == hstat.contlen)
|
||
{
|
||
if (*dt & RETROKF)
|
||
{
|
||
bool write_to_stdout = (opt.output_document && HYPHENP (opt.output_document));
|
||
|
||
logprintf (LOG_VERBOSE,
|
||
write_to_stdout
|
||
? _("%s (%s) - written to stdout %s[%s/%s]\n\n")
|
||
: _("%s (%s) - %s saved [%s/%s]\n\n"),
|
||
tms, tmrate,
|
||
write_to_stdout ? "" : quote (hstat.local_file),
|
||
number_to_static_string (hstat.len),
|
||
number_to_static_string (hstat.contlen));
|
||
logprintf (LOG_NONVERBOSE,
|
||
"%s URL:%s [%s/%s] -> \"%s\" [%d]\n",
|
||
tms, u->url,
|
||
number_to_static_string (hstat.len),
|
||
number_to_static_string (hstat.contlen),
|
||
hstat.local_file, count);
|
||
}
|
||
++numurls;
|
||
total_downloaded_bytes += hstat.rd_size;
|
||
|
||
/* Remember that we downloaded the file for later ".orig" code. */
|
||
if (*dt & ADDED_HTML_EXTENSION)
|
||
downloaded_file (FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
|
||
else
|
||
downloaded_file (FILE_DOWNLOADED_NORMALLY, hstat.local_file);
|
||
|
||
ret = RETROK;
|
||
goto exit;
|
||
}
|
||
else if (hstat.res == 0) /* No read error */
|
||
{
|
||
if (hstat.contlen == -1) /* We don't know how much we were supposed
|
||
to get, so assume we succeeded. */
|
||
{
|
||
if (*dt & RETROKF)
|
||
{
|
||
bool write_to_stdout = (opt.output_document && HYPHENP (opt.output_document));
|
||
|
||
logprintf (LOG_VERBOSE,
|
||
write_to_stdout
|
||
? _("%s (%s) - written to stdout %s[%s]\n\n")
|
||
: _("%s (%s) - %s saved [%s]\n\n"),
|
||
tms, tmrate,
|
||
write_to_stdout ? "" : quote (hstat.local_file),
|
||
number_to_static_string (hstat.len));
|
||
logprintf (LOG_NONVERBOSE,
|
||
"%s URL:%s [%s] -> \"%s\" [%d]\n",
|
||
tms, u->url, number_to_static_string (hstat.len),
|
||
hstat.local_file, count);
|
||
}
|
||
++numurls;
|
||
total_downloaded_bytes += hstat.rd_size;
|
||
|
||
/* Remember that we downloaded the file for later ".orig" code. */
|
||
if (*dt & ADDED_HTML_EXTENSION)
|
||
downloaded_file (FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED, hstat.local_file);
|
||
else
|
||
downloaded_file (FILE_DOWNLOADED_NORMALLY, hstat.local_file);
|
||
|
||
ret = RETROK;
|
||
goto exit;
|
||
}
|
||
else if (hstat.len < hstat.contlen) /* meaning we lost the
|
||
connection too soon */
|
||
{
|
||
logprintf (LOG_VERBOSE,
|
||
_("%s (%s) - Connection closed at byte %s. "),
|
||
tms, tmrate, number_to_static_string (hstat.len));
|
||
printwhat (count, opt.ntry);
|
||
continue;
|
||
}
|
||
else if (hstat.len != hstat.restval)
|
||
/* Getting here would mean reading more data than
|
||
requested with content-length, which we never do. */
|
||
abort ();
|
||
else
|
||
{
|
||
/* Getting here probably means that the content-length was
|
||
* _less_ than the original, local size. We should probably
|
||
* truncate or re-read, or something. FIXME */
|
||
ret = RETROK;
|
||
goto exit;
|
||
}
|
||
}
|
||
else /* from now on hstat.res can only be -1 */
|
||
{
|
||
if (hstat.contlen == -1)
|
||
{
|
||
logprintf (LOG_VERBOSE,
|
||
_("%s (%s) - Read error at byte %s (%s)."),
|
||
tms, tmrate, number_to_static_string (hstat.len),
|
||
hstat.rderrmsg);
|
||
printwhat (count, opt.ntry);
|
||
continue;
|
||
}
|
||
else /* hstat.res == -1 and contlen is given */
|
||
{
|
||
logprintf (LOG_VERBOSE,
|
||
_("%s (%s) - Read error at byte %s/%s (%s). "),
|
||
tms, tmrate,
|
||
number_to_static_string (hstat.len),
|
||
number_to_static_string (hstat.contlen),
|
||
hstat.rderrmsg);
|
||
printwhat (count, opt.ntry);
|
||
continue;
|
||
}
|
||
}
|
||
/* not reached */
|
||
}
|
||
while (!opt.ntry || (count < opt.ntry));
|
||
|
||
exit:
|
||
if (ret == RETROK && local_file)
|
||
*local_file = xstrdup (hstat.local_file);
|
||
free_hstat (&hstat);
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Check whether the result of strptime() indicates success.
|
||
strptime() returns the pointer to how far it got to in the string.
|
||
The processing has been successful if the string is at `GMT' or
|
||
`+X', or at the end of the string.
|
||
|
||
In extended regexp parlance, the function returns 1 if P matches
|
||
"^ *(GMT|[+-][0-9]|$)", 0 otherwise. P being NULL (which strptime
|
||
can return) is considered a failure and 0 is returned. */
|
||
static bool
|
||
check_end (const char *p)
|
||
{
|
||
if (!p)
|
||
return false;
|
||
while (c_isspace (*p))
|
||
++p;
|
||
if (!*p
|
||
|| (p[0] == 'G' && p[1] == 'M' && p[2] == 'T')
|
||
|| ((p[0] == '+' || p[0] == '-') && c_isdigit (p[1])))
|
||
return true;
|
||
else
|
||
return false;
|
||
}
|
||
|
||
/* Convert the textual specification of time in TIME_STRING to the
|
||
number of seconds since the Epoch.
|
||
|
||
TIME_STRING can be in any of the three formats RFC2616 allows the
|
||
HTTP servers to emit -- RFC1123-date, RFC850-date or asctime-date,
|
||
as well as the time format used in the Set-Cookie header.
|
||
Timezones are ignored, and should be GMT.
|
||
|
||
Return the computed time_t representation, or -1 if the conversion
|
||
fails.
|
||
|
||
This function uses strptime with various string formats for parsing
|
||
TIME_STRING. This results in a parser that is not as lenient in
|
||
interpreting TIME_STRING as I would like it to be. Being based on
|
||
strptime, it always allows shortened months, one-digit days, etc.,
|
||
but due to the multitude of formats in which time can be
|
||
represented, an ideal HTTP time parser would be even more
|
||
forgiving. It should completely ignore things like week days and
|
||
concentrate only on the various forms of representing years,
|
||
months, days, hours, minutes, and seconds. For example, it would
|
||
be nice if it accepted ISO 8601 out of the box.
|
||
|
||
I've investigated free and PD code for this purpose, but none was
|
||
usable. getdate was big and unwieldy, and had potential copyright
|
||
issues, or so I was informed. Dr. Marcus Hennecke's atotm(),
|
||
distributed with phttpd, is excellent, but we cannot use it because
|
||
it is not assigned to the FSF. So I stuck it with strptime. */
|
||
|
||
time_t
|
||
http_atotm (const char *time_string)
|
||
{
|
||
/* NOTE: Solaris strptime man page claims that %n and %t match white
|
||
space, but that's not universally available. Instead, we simply
|
||
use ` ' to mean "skip all WS", which works under all strptime
|
||
implementations I've tested. */
|
||
|
||
static const char *time_formats[] = {
|
||
"%a, %d %b %Y %T", /* rfc1123: Thu, 29 Jan 1998 22:12:57 */
|
||
"%A, %d-%b-%y %T", /* rfc850: Thursday, 29-Jan-98 22:12:57 */
|
||
"%a %b %d %T %Y", /* asctime: Thu Jan 29 22:12:57 1998 */
|
||
"%a, %d-%b-%Y %T" /* cookies: Thu, 29-Jan-1998 22:12:57
|
||
(used in Set-Cookie, defined in the
|
||
Netscape cookie specification.) */
|
||
};
|
||
const char *oldlocale;
|
||
char savedlocale[256];
|
||
size_t i;
|
||
time_t ret = (time_t) -1;
|
||
|
||
/* Solaris strptime fails to recognize English month names in
|
||
non-English locales, which we work around by temporarily setting
|
||
locale to C before invoking strptime. */
|
||
oldlocale = setlocale (LC_TIME, NULL);
|
||
if (oldlocale)
|
||
{
|
||
size_t l = strlen (oldlocale) + 1;
|
||
if (l >= sizeof savedlocale)
|
||
savedlocale[0] = '\0';
|
||
else
|
||
memcpy (savedlocale, oldlocale, l);
|
||
}
|
||
else savedlocale[0] = '\0';
|
||
|
||
setlocale (LC_TIME, "C");
|
||
|
||
for (i = 0; i < countof (time_formats); i++)
|
||
{
|
||
struct tm t;
|
||
|
||
/* Some versions of strptime use the existing contents of struct
|
||
tm to recalculate the date according to format. Zero it out
|
||
to prevent stack garbage from influencing strptime. */
|
||
xzero (t);
|
||
|
||
if (check_end (strptime (time_string, time_formats[i], &t)))
|
||
{
|
||
ret = timegm (&t);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Restore the previous locale. */
|
||
if (savedlocale[0])
|
||
setlocale (LC_TIME, savedlocale);
|
||
|
||
return ret;
|
||
}
|
||
|
||
/* Authorization support: We support three authorization schemes:
|
||
|
||
* `Basic' scheme, consisting of base64-ing USER:PASSWORD string;
|
||
|
||
* `Digest' scheme, added by Junio Hamano <junio@twinsun.com>,
|
||
consisting of answering to the server's challenge with the proper
|
||
MD5 digests.
|
||
|
||
* `NTLM' ("NT Lan Manager") scheme, based on code written by Daniel
|
||
Stenberg for libcurl. Like digest, NTLM is based on a
|
||
challenge-response mechanism, but unlike digest, it is non-standard
|
||
(authenticates TCP connections rather than requests), undocumented
|
||
and Microsoft-specific. */
|
||
|
||
/* Create the authentication header contents for the `Basic' scheme.
|
||
This is done by encoding the string "USER:PASS" to base64 and
|
||
prepending the string "Basic " in front of it. */
|
||
|
||
static char *
|
||
basic_authentication_encode (const char *user, const char *passwd)
|
||
{
|
||
char *t1, *t2;
|
||
int len1 = strlen (user) + 1 + strlen (passwd);
|
||
|
||
t1 = (char *)alloca (len1 + 1);
|
||
sprintf (t1, "%s:%s", user, passwd);
|
||
|
||
t2 = (char *)alloca (BASE64_LENGTH (len1) + 1);
|
||
base64_encode (t1, len1, t2);
|
||
|
||
return concat_strings ("Basic ", t2, (char *) 0);
|
||
}
|
||
|
||
#define SKIP_WS(x) do { \
|
||
while (c_isspace (*(x))) \
|
||
++(x); \
|
||
} while (0)
|
||
|
||
#ifdef ENABLE_DIGEST
|
||
/* Dump the hexadecimal representation of HASH to BUF. HASH should be
|
||
an array of 16 bytes containing the hash keys, and BUF should be a
|
||
buffer of 33 writable characters (32 for hex digits plus one for
|
||
zero termination). */
|
||
static void
|
||
dump_hash (char *buf, const unsigned char *hash)
|
||
{
|
||
int i;
|
||
|
||
for (i = 0; i < MD5_DIGEST_SIZE; i++, hash++)
|
||
{
|
||
*buf++ = XNUM_TO_digit (*hash >> 4);
|
||
*buf++ = XNUM_TO_digit (*hash & 0xf);
|
||
}
|
||
*buf = '\0';
|
||
}
|
||
|
||
/* Take the line apart to find the challenge, and compose a digest
|
||
authorization header. See RFC2069 section 2.1.2. */
|
||
static char *
|
||
digest_authentication_encode (const char *au, const char *user,
|
||
const char *passwd, const char *method,
|
||
const char *path)
|
||
{
|
||
static char *realm, *opaque, *nonce;
|
||
static struct {
|
||
const char *name;
|
||
char **variable;
|
||
} options[] = {
|
||
{ "realm", &realm },
|
||
{ "opaque", &opaque },
|
||
{ "nonce", &nonce }
|
||
};
|
||
char *res;
|
||
param_token name, value;
|
||
|
||
realm = opaque = nonce = NULL;
|
||
|
||
au += 6; /* skip over `Digest' */
|
||
while (extract_param (&au, &name, &value, ','))
|
||
{
|
||
size_t i;
|
||
size_t namelen = name.e - name.b;
|
||
for (i = 0; i < countof (options); i++)
|
||
if (namelen == strlen (options[i].name)
|
||
&& 0 == strncmp (name.b, options[i].name,
|
||
namelen))
|
||
{
|
||
*options[i].variable = strdupdelim (value.b, value.e);
|
||
break;
|
||
}
|
||
}
|
||
if (!realm || !nonce || !user || !passwd || !path || !method)
|
||
{
|
||
xfree_null (realm);
|
||
xfree_null (opaque);
|
||
xfree_null (nonce);
|
||
return NULL;
|
||
}
|
||
|
||
/* Calculate the digest value. */
|
||
{
|
||
struct md5_ctx ctx;
|
||
unsigned char hash[MD5_DIGEST_SIZE];
|
||
char a1buf[MD5_DIGEST_SIZE * 2 + 1], a2buf[MD5_DIGEST_SIZE * 2 + 1];
|
||
char response_digest[MD5_DIGEST_SIZE * 2 + 1];
|
||
|
||
/* A1BUF = H(user ":" realm ":" password) */
|
||
md5_init_ctx (&ctx);
|
||
md5_process_bytes ((unsigned char *)user, strlen (user), &ctx);
|
||
md5_process_bytes ((unsigned char *)":", 1, &ctx);
|
||
md5_process_bytes ((unsigned char *)realm, strlen (realm), &ctx);
|
||
md5_process_bytes ((unsigned char *)":", 1, &ctx);
|
||
md5_process_bytes ((unsigned char *)passwd, strlen (passwd), &ctx);
|
||
md5_finish_ctx (&ctx, hash);
|
||
dump_hash (a1buf, hash);
|
||
|
||
/* A2BUF = H(method ":" path) */
|
||
md5_init_ctx (&ctx);
|
||
md5_process_bytes ((unsigned char *)method, strlen (method), &ctx);
|
||
md5_process_bytes ((unsigned char *)":", 1, &ctx);
|
||
md5_process_bytes ((unsigned char *)path, strlen (path), &ctx);
|
||
md5_finish_ctx (&ctx, hash);
|
||
dump_hash (a2buf, hash);
|
||
|
||
/* RESPONSE_DIGEST = H(A1BUF ":" nonce ":" A2BUF) */
|
||
md5_init_ctx (&ctx);
|
||
md5_process_bytes ((unsigned char *)a1buf, MD5_DIGEST_SIZE * 2, &ctx);
|
||
md5_process_bytes ((unsigned char *)":", 1, &ctx);
|
||
md5_process_bytes ((unsigned char *)nonce, strlen (nonce), &ctx);
|
||
md5_process_bytes ((unsigned char *)":", 1, &ctx);
|
||
md5_process_bytes ((unsigned char *)a2buf, MD5_DIGEST_SIZE * 2, &ctx);
|
||
md5_finish_ctx (&ctx, hash);
|
||
dump_hash (response_digest, hash);
|
||
|
||
res = xmalloc (strlen (user)
|
||
+ strlen (user)
|
||
+ strlen (realm)
|
||
+ strlen (nonce)
|
||
+ strlen (path)
|
||
+ 2 * MD5_DIGEST_SIZE /*strlen (response_digest)*/
|
||
+ (opaque ? strlen (opaque) : 0)
|
||
+ 128);
|
||
sprintf (res, "Digest \
|
||
username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
|
||
user, realm, nonce, path, response_digest);
|
||
if (opaque)
|
||
{
|
||
char *p = res + strlen (res);
|
||
strcat (p, ", opaque=\"");
|
||
strcat (p, opaque);
|
||
strcat (p, "\"");
|
||
}
|
||
}
|
||
return res;
|
||
}
|
||
#endif /* ENABLE_DIGEST */
|
||
|
||
/* Computing the size of a string literal must take into account that
|
||
value returned by sizeof includes the terminating \0. */
|
||
#define STRSIZE(literal) (sizeof (literal) - 1)
|
||
|
||
/* Whether chars in [b, e) begin with the literal string provided as
|
||
first argument and are followed by whitespace or terminating \0.
|
||
The comparison is case-insensitive. */
|
||
#define STARTS(literal, b, e) \
|
||
((e > b) \
|
||
&& ((size_t) ((e) - (b))) >= STRSIZE (literal) \
|
||
&& 0 == strncasecmp (b, literal, STRSIZE (literal)) \
|
||
&& ((size_t) ((e) - (b)) == STRSIZE (literal) \
|
||
|| c_isspace (b[STRSIZE (literal)])))
|
||
|
||
static bool
|
||
known_authentication_scheme_p (const char *hdrbeg, const char *hdrend)
|
||
{
|
||
return STARTS ("Basic", hdrbeg, hdrend)
|
||
#ifdef ENABLE_DIGEST
|
||
|| STARTS ("Digest", hdrbeg, hdrend)
|
||
#endif
|
||
#ifdef ENABLE_NTLM
|
||
|| STARTS ("NTLM", hdrbeg, hdrend)
|
||
#endif
|
||
;
|
||
}
|
||
|
||
#undef STARTS
|
||
|
||
/* Create the HTTP authorization request header. When the
|
||
`WWW-Authenticate' response header is seen, according to the
|
||
authorization scheme specified in that header (`Basic' and `Digest'
|
||
are supported by the current implementation), produce an
|
||
appropriate HTTP authorization request header. */
|
||
static char *
|
||
create_authorization_line (const char *au, const char *user,
|
||
const char *passwd, const char *method,
|
||
const char *path, bool *finished)
|
||
{
|
||
/* We are called only with known schemes, so we can dispatch on the
|
||
first letter. */
|
||
switch (c_toupper (*au))
|
||
{
|
||
case 'B': /* Basic */
|
||
*finished = true;
|
||
return basic_authentication_encode (user, passwd);
|
||
#ifdef ENABLE_DIGEST
|
||
case 'D': /* Digest */
|
||
*finished = true;
|
||
return digest_authentication_encode (au, user, passwd, method, path);
|
||
#endif
|
||
#ifdef ENABLE_NTLM
|
||
case 'N': /* NTLM */
|
||
if (!ntlm_input (&pconn.ntlm, au))
|
||
{
|
||
*finished = true;
|
||
return NULL;
|
||
}
|
||
return ntlm_output (&pconn.ntlm, user, passwd, finished);
|
||
#endif
|
||
default:
|
||
/* We shouldn't get here -- this function should be only called
|
||
with values approved by known_authentication_scheme_p. */
|
||
abort ();
|
||
}
|
||
}
|
||
|
||
static void
|
||
load_cookies (void)
|
||
{
|
||
if (!wget_cookie_jar)
|
||
wget_cookie_jar = cookie_jar_new ();
|
||
if (opt.cookies_input && !cookies_loaded_p)
|
||
{
|
||
cookie_jar_load (wget_cookie_jar, opt.cookies_input);
|
||
cookies_loaded_p = true;
|
||
}
|
||
}
|
||
|
||
void
|
||
save_cookies (void)
|
||
{
|
||
if (wget_cookie_jar)
|
||
cookie_jar_save (wget_cookie_jar, opt.cookies_output);
|
||
}
|
||
|
||
void
|
||
http_cleanup (void)
|
||
{
|
||
xfree_null (pconn.host);
|
||
if (wget_cookie_jar)
|
||
cookie_jar_delete (wget_cookie_jar);
|
||
}
|
||
|
||
void
|
||
ensure_extension (struct http_stat *hs, const char *ext, int *dt)
|
||
{
|
||
char *last_period_in_local_filename = strrchr (hs->local_file, '.');
|
||
char shortext[8];
|
||
int len = strlen (ext);
|
||
if (len == 5)
|
||
{
|
||
strncpy (shortext, ext, len - 1);
|
||
shortext[len - 1] = '\0';
|
||
}
|
||
|
||
if (last_period_in_local_filename == NULL
|
||
|| !(0 == strcasecmp (last_period_in_local_filename, shortext)
|
||
|| 0 == strcasecmp (last_period_in_local_filename, ext)))
|
||
{
|
||
int local_filename_len = strlen (hs->local_file);
|
||
/* Resize the local file, allowing for ".html" preceded by
|
||
optional ".NUMBER". */
|
||
hs->local_file = xrealloc (hs->local_file,
|
||
local_filename_len + 24 + len);
|
||
strcpy (hs->local_file + local_filename_len, ext);
|
||
/* If clobbering is not allowed and the file, as named,
|
||
exists, tack on ".NUMBER.html" instead. */
|
||
if (!ALLOW_CLOBBER && file_exists_p (hs->local_file))
|
||
{
|
||
int ext_num = 1;
|
||
do
|
||
sprintf (hs->local_file + local_filename_len,
|
||
".%d%s", ext_num++, ext);
|
||
while (file_exists_p (hs->local_file));
|
||
}
|
||
*dt |= ADDED_HTML_EXTENSION;
|
||
}
|
||
}
|
||
|
||
|
||
#ifdef TESTING
|
||
|
||
const char *
|
||
test_parse_content_disposition()
|
||
{
|
||
int i;
|
||
struct {
|
||
char *hdrval;
|
||
char *filename;
|
||
bool result;
|
||
} test_array[] = {
|
||
{ "filename=\"file.ext\"", "file.ext", true },
|
||
{ "attachment; filename=\"file.ext\"", "file.ext", true },
|
||
{ "attachment; filename=\"file.ext\"; dummy", "file.ext", true },
|
||
{ "attachment", NULL, false },
|
||
{ "attachement; filename*=UTF-8'en-US'hello.txt", "hello.txt", true },
|
||
{ "attachement; filename*0=\"hello\"; filename*1=\"world.txt\"", "helloworld.txt", true },
|
||
};
|
||
|
||
for (i = 0; i < sizeof(test_array)/sizeof(test_array[0]); ++i)
|
||
{
|
||
char *filename;
|
||
bool res;
|
||
|
||
res = parse_content_disposition (test_array[i].hdrval, &filename);
|
||
|
||
mu_assert ("test_parse_content_disposition: wrong result",
|
||
res == test_array[i].result
|
||
&& (res == false
|
||
|| 0 == strcmp (test_array[i].filename, filename)));
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
#endif /* TESTING */
|
||
|
||
/*
|
||
* vim: et sts=2 sw=2 cino+={s
|
||
*/
|
||
|