moparisthebest/wget
1
0
Fork 0
mirror of https://github.com/moparisthebest/wget synced 2024-07-03 16:38:41 -04:00
Code Issues Releases Wiki Activity

[svn] Split off non-URL related stuff from url.c to convert.c.

Browse Source
This commit is contained in:
hniksic 2003-09-21 15:47:14 -07:00
parent 12ffc87ca7
commit 95c647eb44
14 changed files with 1273 additions and 1161 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/ChangeLog
View File

@ -1,3 +1,10 @@
2003-09-22 Hrvoje Niksic <hniksic@xemacs.org>
* retr.c (getproxy): Moved from url.c.
* convert.c: Split off link conversion from url.c into separate
file. Also included the book-keeping stuff from recur.c.
2003-09-21 Hrvoje Niksic <hniksic@xemacs.org>
* init.c: Improved documentation of functions.

5
src/Makefile.in
View File

@ -72,8 +72,8 @@ OPIE_OBJ = @OPIE_OBJ@
SSL_OBJ = @SSL_OBJ@
GETOPT_OBJ = @GETOPT_OBJ@
OBJ = $(ALLOCA) cmpt$o connect$o cookies$o fnmatch$o ftp$o \
ftp-basic$o ftp-ls$o $(OPIE_OBJ) $(GETOPT_OBJ) hash$o \
OBJ = $(ALLOCA) cmpt$o connect$o convert$o cookies$o fnmatch$o \
ftp$o ftp-basic$o ftp-ls$o $(OPIE_OBJ) $(GETOPT_OBJ) hash$o \
headers$o host$o html-parse$o html-url$o http$o init$o \
log$o main$o $(MD5_OBJ) netrc$o progress$o rbuf$o recur$o \
res$o retr$o safe-ctype$o snprintf$o $(SSL_OBJ) url$o \
@ -154,6 +154,7 @@ TAGS: *.c *.h
alloca$o:
cmpt$o: wget.h sysdep.h options.h safe-ctype.h
connect$o: wget.h sysdep.h options.h safe-ctype.h utils.h connect.h host.h
convert$o: wget.h convert.h url.h recur.h utils.h hash.h
cookies$o: wget.h sysdep.h options.h safe-ctype.h cookies.h hash.h url.h utils.h
fnmatch$o: wget.h sysdep.h options.h safe-ctype.h fnmatch.h
ftp-basic$o: wget.h sysdep.h options.h safe-ctype.h utils.h rbuf.h connect.h \

959
src/convert.c Normal file
View File

@ -0,0 +1,959 @@
/* Conversion of links to local files.
Copyright (C) 1996, 1997, 2000, 2001 Free Software Foundation, Inc.
This file is part of GNU Wget.
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
In addition, as a special exception, the Free Software Foundation
gives permission to link the code of its release of Wget with the
OpenSSL project's "OpenSSL" library (or with modified versions of it
that use the same license as the "OpenSSL" library), and distribute
the linked executables. You must obey the GNU General Public License
in all respects for all of the code used other than "OpenSSL". If you
modify this file, you may extend this exception to your version of the
file, but you are not obligated to do so. If you do not wish to do
so, delete this exception statement from your version. */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_STRING_H
# include <string.h>
#else
# include <strings.h>
#endif /* HAVE_STRING_H */
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include <errno.h>
#include <assert.h>
#include <sys/types.h>
#include "wget.h"
#include "convert.h"
#include "url.h"
#include "recur.h"
#include "utils.h"
#include "hash.h"
static struct hash_table *dl_file_url_map;
struct hash_table *dl_url_file_map;
/* List of HTML files downloaded in this Wget run, used for link
conversion after Wget is done. The list and the set contain the
same information, except the list maintains the order. Perhaps I
should get rid of the list, it's there for historical reasons. */
static slist *downloaded_html_list;
struct hash_table *downloaded_html_set;
static void convert_links PARAMS ((const char *, struct urlpos *));
/* This function is called when the retrieval is done to convert the
links that have been downloaded. It has to be called at the end of
the retrieval, because only then does Wget know conclusively which
URLs have been downloaded, and which not, so it can tell which
direction to convert to.
The "direction" means that the URLs to the files that have been
downloaded get converted to the relative URL which will point to
that file. And the other URLs get converted to the remote URL on
the server.
All the downloaded HTMLs are kept in downloaded_html_files, and
downloaded URLs in urls_downloaded. All the information is
extracted from these two lists. */
void
convert_all_links (void)
{
slist *html;
long msecs;
int file_count = 0;
struct wget_timer *timer = wtimer_new ();
/* Destructively reverse downloaded_html_files to get it in the right order.
recursive_retrieve() used slist_prepend() consistently. */
downloaded_html_list = slist_nreverse (downloaded_html_list);
for (html = downloaded_html_list; html; html = html->next)
{
struct urlpos *urls, *cur_url;
char *url;
char *file = html->string;
/* Determine the URL of the HTML file. get_urls_html will need
it. */
url = hash_table_get (dl_file_url_map, file);
if (!url)
{
DEBUGP (("Apparently %s has been removed.\n", file));
continue;
}
DEBUGP (("Scanning %s (from %s)\n", file, url));
/* Parse the HTML file... */
urls = get_urls_html (file, url, NULL);
/* We don't respect meta_disallow_follow here because, even if
the file is not followed, we might still want to convert the
links that have been followed from other files. */
for (cur_url = urls; cur_url; cur_url = cur_url->next)
{
char *local_name;
struct url *u = cur_url->url;
if (cur_url->link_base_p)
{
/* Base references have been resolved by our parser, so
we turn the base URL into an empty string. (Perhaps
we should remove the tag entirely?) */
cur_url->convert = CO_NULLIFY_BASE;
continue;
}
/* We decide the direction of conversion according to whether
a URL was downloaded. Downloaded URLs will be converted
ABS2REL, whereas non-downloaded will be converted REL2ABS. */
local_name = hash_table_get (dl_url_file_map, u->url);
/* Decide on the conversion type. */
if (local_name)
{
/* We've downloaded this URL. Convert it to relative
form. We do this even if the URL already is in
relative form, because our directory structure may
not be identical to that on the server (think `-nd',
`--cut-dirs', etc.) */
cur_url->convert = CO_CONVERT_TO_RELATIVE;
cur_url->local_name = xstrdup (local_name);
DEBUGP (("will convert url %s to local %s\n", u->url, local_name));
}
else
{
/* We haven't downloaded this URL. If it's not already
complete (including a full host name), convert it to
that form, so it can be reached while browsing this
HTML locally. */
if (!cur_url->link_complete_p)
cur_url->convert = CO_CONVERT_TO_COMPLETE;
cur_url->local_name = NULL;
DEBUGP (("will convert url %s to complete\n", u->url));
}
}
/* Convert the links in the file. */
convert_links (file, urls);
++file_count;
/* Free the data. */
free_urlpos (urls);
}
msecs = wtimer_elapsed (timer);
wtimer_delete (timer);
logprintf (LOG_VERBOSE, _("Converted %d files in %.2f seconds.\n"),
file_count, (double)msecs / 1000);
}
static void write_backup_file PARAMS ((const char *, downloaded_file_t));
static const char *replace_attr PARAMS ((const char *, int, FILE *,
const char *));
static const char *replace_attr_refresh_hack PARAMS ((const char *, int, FILE *,
const char *, int));
static char *local_quote_string PARAMS ((const char *));
static char *construct_relative PARAMS ((const char *, const char *));
/* Change the links in one HTML file. LINKS is a list of links in the
document, along with their positions and the desired direction of
the conversion. */
static void
convert_links (const char *file, struct urlpos *links)
{
struct file_memory *fm;
FILE *fp;
const char *p;
downloaded_file_t downloaded_file_return;
struct urlpos *link;
int to_url_count = 0, to_file_count = 0;
logprintf (LOG_VERBOSE, _("Converting %s... "), file);
{
/* First we do a "dry run": go through the list L and see whether
any URL needs to be converted in the first place. If not, just
leave the file alone. */
int dry_count = 0;
struct urlpos *dry = links;
for (dry = links; dry; dry = dry->next)
if (dry->convert != CO_NOCONVERT)
++dry_count;
if (!dry_count)
{
logputs (LOG_VERBOSE, _("nothing to do.\n"));
return;
}
}
fm = read_file (file);
if (!fm)
{
logprintf (LOG_NOTQUIET, _("Cannot convert links in %s: %s\n"),
file, strerror (errno));
return;
}
downloaded_file_return = downloaded_file (CHECK_FOR_FILE, file);
if (opt.backup_converted && downloaded_file_return)
write_backup_file (file, downloaded_file_return);
/* Before opening the file for writing, unlink the file. This is
important if the data in FM is mmaped. In such case, nulling the
file, which is what fopen() below does, would make us read all
zeroes from the mmaped region. */
if (unlink (file) < 0 && errno != ENOENT)
{
logprintf (LOG_NOTQUIET, _("Unable to delete `%s': %s\n"),
file, strerror (errno));
read_file_free (fm);
return;
}
/* Now open the file for writing. */
fp = fopen (file, "wb");
if (!fp)
{
logprintf (LOG_NOTQUIET, _("Cannot convert links in %s: %s\n"),
file, strerror (errno));
read_file_free (fm);
return;
}
/* Here we loop through all the URLs in file, replacing those of
them that are downloaded with relative references. */
p = fm->content;
for (link = links; link; link = link->next)
{
char *url_start = fm->content + link->pos;
if (link->pos >= fm->length)
{
DEBUGP (("Something strange is going on. Please investigate."));
break;
}
/* If the URL is not to be converted, skip it. */
if (link->convert == CO_NOCONVERT)
{
DEBUGP (("Skipping %s at position %d.\n", link->url->url, link->pos));
continue;
}
/* Echo the file contents, up to the offending URL's opening
quote, to the outfile. */
fwrite (p, 1, url_start - p, fp);
p = url_start;
switch (link->convert)
{
case CO_CONVERT_TO_RELATIVE:
/* Convert absolute URL to relative. */
{
char *newname = construct_relative (file, link->local_name);
char *quoted_newname = local_quote_string (newname);
if (!link->link_refresh_p)
p = replace_attr (p, link->size, fp, quoted_newname);
else
p = replace_attr_refresh_hack (p, link->size, fp, quoted_newname,
link->refresh_timeout);
DEBUGP (("TO_RELATIVE: %s to %s at position %d in %s.\n",
link->url->url, newname, link->pos, file));
xfree (newname);
xfree (quoted_newname);
++to_file_count;
break;
}
case CO_CONVERT_TO_COMPLETE:
/* Convert the link to absolute URL. */
{
char *newlink = link->url->url;
char *quoted_newlink = html_quote_string (newlink);
if (!link->link_refresh_p)
p = replace_attr (p, link->size, fp, quoted_newlink);
else
p = replace_attr_refresh_hack (p, link->size, fp, quoted_newlink,
link->refresh_timeout);
DEBUGP (("TO_COMPLETE: <something> to %s at position %d in %s.\n",
newlink, link->pos, file));
xfree (quoted_newlink);
++to_url_count;
break;
}
case CO_NULLIFY_BASE:
/* Change the base href to "". */
p = replace_attr (p, link->size, fp, "");
break;
case CO_NOCONVERT:
abort ();
break;
}
}
/* Output the rest of the file. */
if (p - fm->content < fm->length)
fwrite (p, 1, fm->length - (p - fm->content), fp);
fclose (fp);
read_file_free (fm);
logprintf (LOG_VERBOSE, "%d-%d\n", to_file_count, to_url_count);
}
/* Construct and return a malloced copy of the relative link from two
pieces of information: local name S1 of the referring file and
local name S2 of the referred file.
So, if S1 is "jagor.srce.hr/index.html" and S2 is
"jagor.srce.hr/images/news.gif", the function will return
"images/news.gif".
Alternately, if S1 is "fly.cc.fer.hr/ioccc/index.html", and S2 is
"fly.cc.fer.hr/images/fly.gif", the function will return
"../images/fly.gif".
Caveats: S1 should not begin with `/', unless S2 also begins with
'/'. S1 should not contain things like ".." and such --
construct_relative ("fly/ioccc/../index.html",
"fly/images/fly.gif") will fail. (A workaround is to call
something like path_simplify() on S1). */
static char *
construct_relative (const char *s1, const char *s2)
{
int i, cnt, sepdirs1;
char *res;
if (*s2 == '/')
return xstrdup (s2);
/* S1 should *not* be absolute, if S2 wasn't. */
assert (*s1 != '/');
i = cnt = 0;
/* Skip the directories common to both strings. */
while (1)
{
while (s1[i] && s2[i]
&& (s1[i] == s2[i])
&& (s1[i] != '/')
&& (s2[i] != '/'))
++i;
if (s1[i] == '/' && s2[i] == '/')
cnt = ++i;
else
break;
}
for (sepdirs1 = 0; s1[i]; i++)
if (s1[i] == '/')
++sepdirs1;
/* Now, construct the file as of:
- ../ repeated sepdirs1 time
- all the non-mutual directories of S2. */
res = (char *)xmalloc (3 * sepdirs1 + strlen (s2 + cnt) + 1);
for (i = 0; i < sepdirs1; i++)
memcpy (res + 3 * i, "../", 3);
strcpy (res + 3 * i, s2 + cnt);
return res;
}
static void
write_backup_file (const char *file, downloaded_file_t downloaded_file_return)
{
/* Rather than just writing over the original .html file with the
converted version, save the former to *.orig. Note we only do
this for files we've _successfully_ downloaded, so we don't
clobber .orig files sitting around from previous invocations. */
/* Construct the backup filename as the original name plus ".orig". */
size_t filename_len = strlen(file);
char* filename_plus_orig_suffix;
boolean already_wrote_backup_file = FALSE;
slist* converted_file_ptr;
static slist* converted_files = NULL;
if (downloaded_file_return == FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED)
{
/* Just write "orig" over "html". We need to do it this way
because when we're checking to see if we've downloaded the
file before (to see if we can skip downloading it), we don't
know if it's a text/html file. Therefore we don't know yet
at that stage that -E is going to cause us to tack on
".html", so we need to compare vs. the original URL plus
".orig", not the original URL plus ".html.orig". */
filename_plus_orig_suffix = alloca (filename_len + 1);
strcpy(filename_plus_orig_suffix, file);
strcpy((filename_plus_orig_suffix + filename_len) - 4, "orig");
}
else /* downloaded_file_return == FILE_DOWNLOADED_NORMALLY */
{
/* Append ".orig" to the name. */
filename_plus_orig_suffix = alloca (filename_len + sizeof(".orig"));
strcpy(filename_plus_orig_suffix, file);
strcpy(filename_plus_orig_suffix + filename_len, ".orig");
}
/* We can get called twice on the same URL thanks to the
convert_all_links() call in main(). If we write the .orig file
each time in such a case, it'll end up containing the first-pass
conversion, not the original file. So, see if we've already been
called on this file. */
converted_file_ptr = converted_files;
while (converted_file_ptr != NULL)
if (strcmp(converted_file_ptr->string, file) == 0)
{
already_wrote_backup_file = TRUE;
break;
}
else
converted_file_ptr = converted_file_ptr->next;
if (!already_wrote_backup_file)
{
/* Rename <file> to <file>.orig before former gets written over. */
if (rename(file, filename_plus_orig_suffix) != 0)
logprintf (LOG_NOTQUIET, _("Cannot back up %s as %s: %s\n"),
file, filename_plus_orig_suffix, strerror (errno));
/* Remember that we've already written a .orig backup for this file.
Note that we never free this memory since we need it till the
convert_all_links() call, which is one of the last things the
program does before terminating. BTW, I'm not sure if it would be
safe to just set 'converted_file_ptr->string' to 'file' below,
rather than making a copy of the string... Another note is that I
thought I could just add a field to the urlpos structure saying
that we'd written a .orig file for this URL, but that didn't work,
so I had to make this separate list.
-- Dan Harkless <wget@harkless.org>
This [adding a field to the urlpos structure] didn't work
because convert_file() is called from convert_all_links at
the end of the retrieval with a freshly built new urlpos
list.
-- Hrvoje Niksic <hniksic@arsdigita.com>
*/
converted_file_ptr = xmalloc(sizeof(*converted_file_ptr));
converted_file_ptr->string = xstrdup(file); /* die on out-of-mem. */
converted_file_ptr->next = converted_files;
converted_files = converted_file_ptr;
}
}
static int find_fragment PARAMS ((const char *, int, const char **,
const char **));
/* Replace an attribute's original text with NEW_TEXT. */
static const char *
replace_attr (const char *p, int size, FILE *fp, const char *new_text)
{
int quote_flag = 0;
char quote_char = '\"'; /* use "..." for quoting, unless the
original value is quoted, in which
case reuse its quoting char. */
const char *frag_beg, *frag_end;
/* Structure of our string is:
"...old-contents..."
<--- size ---> (with quotes)
OR:
...old-contents...
<--- size --> (no quotes) */
if (*p == '\"' || *p == '\'')
{
quote_char = *p;
quote_flag = 1;
++p;
size -= 2; /* disregard opening and closing quote */
}
putc (quote_char, fp);
fputs (new_text, fp);
/* Look for fragment identifier, if any. */
if (find_fragment (p, size, &frag_beg, &frag_end))
fwrite (frag_beg, 1, frag_end - frag_beg, fp);
p += size;
if (quote_flag)
++p;
putc (quote_char, fp);
return p;
}
/* The same as REPLACE_ATTR, but used when replacing
<meta http-equiv=refresh content="new_text"> because we need to
append "timeout_value; URL=" before the next_text. */
static const char *
replace_attr_refresh_hack (const char *p, int size, FILE *fp,
const char *new_text, int timeout)
{
/* "0; URL=..." */
char *new_with_timeout = (char *)alloca (numdigit (timeout)
+ 6 /* "; URL=" */
+ strlen (new_text)
+ 1);
sprintf (new_with_timeout, "%d; URL=%s", timeout, new_text);
return replace_attr (p, size, fp, new_with_timeout);
}
/* Find the first occurrence of '#' in [BEG, BEG+SIZE) that is not
preceded by '&'. If the character is not found, return zero. If
the character is found, return 1 and set BP and EP to point to the
beginning and end of the region.
This is used for finding the fragment indentifiers in URLs. */
static int
find_fragment (const char *beg, int size, const char **bp, const char **ep)
{
const char *end = beg + size;
int saw_amp = 0;
for (; beg < end; beg++)
{
switch (*beg)
{
case '&':
saw_amp = 1;
break;
case '#':
if (!saw_amp)
{
*bp = beg;
*ep = end;
return 1;
}
/* fallthrough */
default:
saw_amp = 0;
}
}
return 0;
}
/* Quote FILE for use as local reference to an HTML file.
We quote ? as %3F to avoid passing part of the file name as the
parameter when browsing the converted file through HTTP. However,
it is safe to do this only when `--html-extension' is turned on.
This is because converting "index.html?foo=bar" to
"index.html%3Ffoo=bar" would break local browsing, as the latter
isn't even recognized as an HTML file! However, converting
"index.html?foo=bar.html" to "index.html%3Ffoo=bar.html" should be
safe for both local and HTTP-served browsing. */
static char *
local_quote_string (const char *file)
{
const char *file_sans_qmark;
int qm;
if (!opt.html_extension)
return html_quote_string (file);
qm = count_char (file, '?');
if (qm)
{
const char *from = file;
char *to, *newname;
/* qm * 2 because we replace each question mark with "%3F",
i.e. replace one char with three, hence two more. */
int fsqlen = strlen (file) + qm * 2;
to = newname = (char *)alloca (fsqlen + 1);
for (; *from; from++)
{
if (*from != '?')
*to++ = *from;
else
{
*to++ = '%';
*to++ = '3';
*to++ = 'F';
}
}
assert (to - newname == fsqlen);
*to = '\0';
file_sans_qmark = newname;
}
else
file_sans_qmark = file;
return html_quote_string (file_sans_qmark);
}
/* Book-keeping code for dl_file_url_map, dl_url_file_map,
downloaded_html_list, and downloaded_html_set. Other code calls
these functions to let us know that a file has been downloaded. */
#define ENSURE_TABLES_EXIST do { \
if (!dl_file_url_map) \
dl_file_url_map = make_string_hash_table (0); \
if (!dl_url_file_map) \
dl_url_file_map = make_string_hash_table (0); \
} while (0)
/* Return 1 if S1 and S2 are the same, except for "/index.html". The
three cases in which it returns one are (substitute any substring
for "foo"):
m("foo/index.html", "foo/") ==> 1
m("foo/", "foo/index.html") ==> 1
m("foo", "foo/index.html") ==> 1
m("foo", "foo/" ==> 1
m("foo", "foo") ==> 1 */
static int
match_except_index (const char *s1, const char *s2)
{
int i;
const char *lng;
/* Skip common substring. */
for (i = 0; *s1 && *s2 && *s1 == *s2; s1++, s2++, i++)
;
if (i == 0)
/* Strings differ at the very beginning -- bail out. We need to
check this explicitly to avoid `lng - 1' reading outside the
array. */
return 0;
if (!*s1 && !*s2)
/* Both strings hit EOF -- strings are equal. */
return 1;
else if (*s1 && *s2)
/* Strings are randomly different, e.g. "/foo/bar" and "/foo/qux". */
return 0;
else if (*s1)
/* S1 is the longer one. */
lng = s1;
else
/* S2 is the longer one. */
lng = s2;
/* foo */ /* foo/ */
/* foo/index.html */ /* or */ /* foo/index.html */
/* ^ */ /* ^ */
if (*lng != '/')
/* The right-hand case. */
--lng;
if (*lng == '/' && *(lng + 1) == '\0')
/* foo */
/* foo/ */
return 1;
return 0 == strcmp (lng, "/index.html");
}
static int
dissociate_urls_from_file_mapper (void *key, void *value, void *arg)
{
char *mapping_url = (char *)key;
char *mapping_file = (char *)value;
char *file = (char *)arg;
if (0 == strcmp (mapping_file, file))
{
hash_table_remove (dl_url_file_map, mapping_url);
xfree (mapping_url);
xfree (mapping_file);
}
/* Continue mapping. */
return 0;
}
/* Remove all associations from various URLs to FILE from dl_url_file_map. */
static void
dissociate_urls_from_file (const char *file)
{
hash_table_map (dl_url_file_map, dissociate_urls_from_file_mapper,
(char *)file);
}
/* Register that URL has been successfully downloaded to FILE. This
is used by the link conversion code to convert references to URLs
to references to local files. It is also being used to check if a
URL has already been downloaded. */
void
register_download (const char *url, const char *file)
{
char *old_file, *old_url;
ENSURE_TABLES_EXIST;
/* With some forms of retrieval, it is possible, although not likely
or particularly desirable. If both are downloaded, the second
download will override the first one. When that happens,
dissociate the old file name from the URL. */
if (hash_table_get_pair (dl_file_url_map, file, &old_file, &old_url))
{
if (0 == strcmp (url, old_url))
/* We have somehow managed to download the same URL twice.
Nothing to do. */
return;
if (match_except_index (url, old_url)
&& !hash_table_contains (dl_url_file_map, url))
/* The two URLs differ only in the "index.html" ending. For
example, one is "http://www.server.com/", and the other is
"http://www.server.com/index.html". Don't remove the old
one, just add the new one as a non-canonical entry. */
goto url_only;
hash_table_remove (dl_file_url_map, file);
xfree (old_file);
xfree (old_url);
/* Remove all the URLs that point to this file. Yes, there can
be more than one such URL, because we store redirections as
multiple entries in dl_url_file_map. For example, if URL1
redirects to URL2 which gets downloaded to FILE, we map both
URL1 and URL2 to FILE in dl_url_file_map. (dl_file_url_map
only points to URL2.) When another URL gets loaded to FILE,
we want both URL1 and URL2 dissociated from it.
This is a relatively expensive operation because it performs
a linear search of the whole hash table, but it should be
called very rarely, only when two URLs resolve to the same
file name, *and* the "<file>.1" extensions are turned off.
In other words, almost never. */
dissociate_urls_from_file (file);
}
hash_table_put (dl_file_url_map, xstrdup (file), xstrdup (url));
url_only:
/* A URL->FILE mapping is not possible without a FILE->URL mapping.
If the latter were present, it should have been removed by the
above `if'. So we could write:
assert (!hash_table_contains (dl_url_file_map, url));
The above is correct when running in recursive mode where the
same URL always resolves to the same file. But if you do
something like:
wget URL URL
then the first URL will resolve to "FILE", and the other to
"FILE.1". In that case, FILE.1 will not be found in
dl_file_url_map, but URL will still point to FILE in
dl_url_file_map. */
if (hash_table_get_pair (dl_url_file_map, url, &old_url, &old_file))
{
hash_table_remove (dl_url_file_map, url);
xfree (old_url);
xfree (old_file);
}
hash_table_put (dl_url_file_map, xstrdup (url), xstrdup (file));
}
/* Register that FROM has been redirected to TO. This assumes that TO
is successfully downloaded and already registered using
register_download() above. */
void
register_redirection (const char *from, const char *to)
{
char *file;
ENSURE_TABLES_EXIST;
file = hash_table_get (dl_url_file_map, to);
assert (file != NULL);
if (!hash_table_contains (dl_url_file_map, from))
hash_table_put (dl_url_file_map, xstrdup (from), xstrdup (file));
}
/* Register that the file has been deleted. */
void
register_delete_file (const char *file)
{
char *old_url, *old_file;
ENSURE_TABLES_EXIST;
if (!hash_table_get_pair (dl_file_url_map, file, &old_file, &old_url))
return;
hash_table_remove (dl_file_url_map, file);
xfree (old_file);
xfree (old_url);
dissociate_urls_from_file (file);
}
/* Register that FILE is an HTML file that has been downloaded. */
void
register_html (const char *url, const char *file)
{
if (!downloaded_html_set)
downloaded_html_set = make_string_hash_table (0);
else if (hash_table_contains (downloaded_html_set, file))
return;
/* The set and the list should use the same copy of FILE, but the
slist interface insists on strduping the string it gets. Oh
well. */
string_set_add (downloaded_html_set, file);
downloaded_html_list = slist_prepend (downloaded_html_list, file);
}
/* Cleanup the data structures associated with recursive retrieving
(the variables above). */
void
convert_cleanup (void)
{
if (dl_file_url_map)
{
free_keys_and_values (dl_file_url_map);
hash_table_destroy (dl_file_url_map);
dl_file_url_map = NULL;
}
if (dl_url_file_map)
{
free_keys_and_values (dl_url_file_map);
hash_table_destroy (dl_url_file_map);
dl_url_file_map = NULL;
}
if (downloaded_html_set)
string_set_free (downloaded_html_set);
slist_free (downloaded_html_list);
downloaded_html_list = NULL;
}
/* Book-keeping code for downloaded files that enables extension
hacks. */
/* This table should really be merged with dl_file_url_map and
downloaded_html_files. This was originally a list, but I changed
it to a hash table beause it was actually taking a lot of time to
find things in it. */
static struct hash_table *downloaded_files_hash;
/* We're storing "modes" of type downloaded_file_t in the hash table.
However, our hash tables only accept pointers for keys and values.
So when we need a pointer, we use the address of a
downloaded_file_t variable of static storage. */
static downloaded_file_t *
downloaded_mode_to_ptr (downloaded_file_t mode)
{
static downloaded_file_t
v1 = FILE_NOT_ALREADY_DOWNLOADED,
v2 = FILE_DOWNLOADED_NORMALLY,
v3 = FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED,
v4 = CHECK_FOR_FILE;
switch (mode)
{
case FILE_NOT_ALREADY_DOWNLOADED:
return &v1;
case FILE_DOWNLOADED_NORMALLY:
return &v2;
case FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED:
return &v3;
case CHECK_FOR_FILE:
return &v4;
}
return NULL;
}
/* Remembers which files have been downloaded. In the standard case,
should be called with mode == FILE_DOWNLOADED_NORMALLY for each
file we actually download successfully (i.e. not for ones we have
failures on or that we skip due to -N).
When we've downloaded a file and tacked on a ".html" extension due
to -E, call this function with
FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED rather than
FILE_DOWNLOADED_NORMALLY.
If you just want to check if a file has been previously added
without adding it, call with mode == CHECK_FOR_FILE. Please be
sure to call this function with local filenames, not remote
URLs. */
downloaded_file_t
downloaded_file (downloaded_file_t mode, const char *file)
{
downloaded_file_t *ptr;
if (mode == CHECK_FOR_FILE)
{
if (!downloaded_files_hash)
return FILE_NOT_ALREADY_DOWNLOADED;
ptr = hash_table_get (downloaded_files_hash, file);
if (!ptr)
return FILE_NOT_ALREADY_DOWNLOADED;
return *ptr;
}
if (!downloaded_files_hash)
downloaded_files_hash = make_string_hash_table (0);
ptr = hash_table_get (downloaded_files_hash, file);
if (ptr)
return *ptr;
ptr = downloaded_mode_to_ptr (mode);
hash_table_put (downloaded_files_hash, xstrdup (file), &ptr);
return FILE_NOT_ALREADY_DOWNLOADED;
}
static int
df_free_mapper (void *key, void *value, void *ignored)
{
xfree (key);
return 0;
}
void
downloaded_files_free (void)
{
if (downloaded_files_hash)
{
hash_table_map (downloaded_files_hash, df_free_mapper, NULL);
hash_table_destroy (downloaded_files_hash);
downloaded_files_hash = NULL;
}
}

100
src/convert.h Normal file
View File

@ -0,0 +1,100 @@
/* Declarations for convert.c
Copyright (C) 2003 Free Software Foundation, Inc.
This file is part of GNU Wget.
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
In addition, as a special exception, the Free Software Foundation
gives permission to link the code of its release of Wget with the
OpenSSL project's "OpenSSL" library (or with modified versions of it
that use the same license as the "OpenSSL" library), and distribute
the linked executables. You must obey the GNU General Public License
in all respects for all of the code used other than "OpenSSL". If you
modify this file, you may extend this exception to your version of the
file, but you are not obligated to do so. If you do not wish to do
so, delete this exception statement from your version. */
#ifndef CONVERT_H
#define CONVERT_H
enum convert_options {
CO_NOCONVERT = 0, /* don't convert this URL */
CO_CONVERT_TO_RELATIVE, /* convert to relative, e.g. to
"../../otherdir/foo.gif" */
CO_CONVERT_TO_COMPLETE, /* convert to absolute, e.g. to
"http://orighost/somedir/bar.jpg". */
CO_NULLIFY_BASE /* change to empty string. */
};
struct url;
/* A structure that defines the whereabouts of a URL, i.e. its
position in an HTML document, etc. */
struct urlpos {
struct url *url; /* the URL of the link, after it has
been merged with the base */
char *local_name; /* local file to which it was saved
(used by convert_links) */
/* reserved for special links such as <base href="..."> which are
used when converting links, but ignored when downloading. */
unsigned int ignore_when_downloading :1;
/* Information about the original link: */
unsigned int link_relative_p :1; /* was the link relative? */
unsigned int link_complete_p :1; /* was the link complete (with the
host name, etc.) */
unsigned int link_base_p :1; /* was the link <base href=...> */
unsigned int link_inline_p :1; /* needed to render the page. */
unsigned int link_refresh_p :1; /* link was received from
<meta http-equiv=refresh content=...> */
int refresh_timeout; /* for reconstructing the refresh. */
/* Conversion requirements: */
enum convert_options convert; /* is conversion required? */
/* URL's position in the buffer. */
int pos, size;
struct urlpos *next; /* next list element */
};
/* downloaded_file() takes a parameter of this type and returns this type. */
typedef enum
{
/* Return enumerators: */
FILE_NOT_ALREADY_DOWNLOADED = 0,
/* Return / parameter enumerators: */
FILE_DOWNLOADED_NORMALLY,
FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED,
/* Parameter enumerators: */
CHECK_FOR_FILE
} downloaded_file_t;
downloaded_file_t downloaded_file PARAMS ((downloaded_file_t, const char *));
void register_download PARAMS ((const char *, const char *));
void register_redirection PARAMS ((const char *, const char *));
void register_html PARAMS ((const char *, const char *));
void register_delete_file PARAMS ((const char *));
void convert_all_links PARAMS ((void));
#endif /* CONVERT_H */

3
src/ftp.c
View File

@ -54,6 +54,7 @@ so, delete this exception statement from your version. */
#include "host.h"
#include "fnmatch.h"
#include "netrc.h"
#include "convert.h" /* for downloaded_file */
#ifndef errno
extern int errno;
@ -1165,7 +1166,7 @@ ftp_loop_internal (struct url *u, struct fileinfo *f, ccon *con)
/* If we get out of the switch above without continue'ing, we've
successfully downloaded a file. Remember this fact. */
downloaded_file(FILE_DOWNLOADED_NORMALLY, locf);
downloaded_file (FILE_DOWNLOADED_NORMALLY, locf);
if (con->st & ON_YOUR_OWN)
{

87
src/html-url.c
View File

@ -43,6 +43,7 @@ so, delete this exception statement from your version. */
#include "html-parse.h"
#include "url.h"
#include "utils.h"
#include "convert.h"
#ifndef errno
extern int errno;
@ -630,6 +631,7 @@ collect_tags_mapper (struct taginfo *tag, void *arg)
/* Analyze HTML tags FILE and construct a list of URLs referenced from
it. It merges relative links in FILE with URL. It is aware of
<base href=...> and does the right thing. */
struct urlpos *
get_urls_html (const char *file, const char *url, int *meta_disallow_follow)
{
@ -667,6 +669,91 @@ get_urls_html (const char *file, const char *url, int *meta_disallow_follow)
return ctx.head;
}
/* This doesn't really have anything to do with HTML, but it's similar
to get_urls_html, so we put it here. */
struct urlpos *
get_urls_file (const char *file)
{
struct file_memory *fm;
struct urlpos *head, *tail;
const char *text, *text_end;
/* Load the file. */
fm = read_file (file);
if (!fm)
{
logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno));
return NULL;
}
DEBUGP (("Loaded %s (size %ld).\n", file, fm->length));
head = tail = NULL;
text = fm->content;
text_end = fm->content + fm->length;
while (text < text_end)
{
int up_error_code;
char *url_text;
struct urlpos *entry;
struct url *url;
const char *line_beg = text;
const char *line_end = memchr (text, '\n', text_end - text);
if (!line_end)
line_end = text_end;
else
++line_end;
text = line_end;
/* Strip whitespace from the beginning and end of line. */
while (line_beg < line_end && ISSPACE (*line_beg))
++line_beg;
while (line_end > line_beg && ISSPACE (*(line_end - 1)))
--line_end;
if (line_beg == line_end)
continue;
/* The URL is in the [line_beg, line_end) region. */
/* We must copy the URL to a zero-terminated string, and we
can't use alloca because we're in a loop. *sigh*. */
url_text = strdupdelim (line_beg, line_end);
if (opt.base_href)
{
/* Merge opt.base_href with URL. */
char *merged = uri_merge (opt.base_href, url_text);
xfree (url_text);
url_text = merged;
}
url = url_parse (url_text, &up_error_code);
if (!url)
{
logprintf (LOG_NOTQUIET, "%s: Invalid URL %s: %s\n",
file, url_text, url_error (up_error_code));
xfree (url_text);
continue;
}
xfree (url_text);
entry = (struct urlpos *)xmalloc (sizeof (struct urlpos));
memset (entry, 0, sizeof (*entry));
entry->next = NULL;
entry->url = url;
if (!head)
head = entry;
else
tail->next = entry;
tail = entry;
}
read_file_free (fm);
return head;
}
void
cleanup_html_url (void)
{

1
src/http.c
View File

@ -71,6 +71,7 @@ so, delete this exception statement from your version. */
#ifdef USE_DIGEST
# include "gen-md5.h"
#endif
#include "convert.h"
extern char *version_string;

3
src/init.c
View File

@ -62,7 +62,6 @@ so, delete this exception statement from your version. */
#include "utils.h"
#include "init.h"
#include "host.h"
#include "recur.h"
#include "netrc.h"
#include "cookies.h" /* for cookie_jar_delete */
#include "progress.h"
@ -1279,7 +1278,7 @@ cleanup (void)
memory which grows with the size of the program. */
#ifdef DEBUG_MALLOC
recursive_cleanup ();
convert_cleanup ();
res_cleanup ();
http_cleanup ();
cleanup_html_url ();

369
src/recur.c
View File

@ -53,6 +53,7 @@ so, delete this exception statement from your version. */
#include "host.h"
#include "hash.h"
#include "res.h"
#include "convert.h"
#ifndef errno
extern int errno;
@ -60,17 +61,8 @@ extern int errno;
extern char *version_string;
static struct hash_table *dl_file_url_map;
static struct hash_table *dl_url_file_map;
/* List of HTML files downloaded in this Wget run, used for link
conversion after Wget is done. The list and the set contain the
same information, except the list maintains the order. Perhaps I
should get rid of the list, it's there for historical reasons. */
static slist *downloaded_html_list;
static struct hash_table *downloaded_html_set;
static void register_delete_file PARAMS ((const char *));
extern struct hash_table *dl_url_file_map;
extern struct hash_table *downloaded_html_set;
/* Functions for maintaining the URL queue. */
@ -620,358 +612,3 @@ descend_redirect_p (const char *redirected, const char *original, int depth,
return success;
}
#define ENSURE_TABLES_EXIST do { \
if (!dl_file_url_map) \
dl_file_url_map = make_string_hash_table (0); \
if (!dl_url_file_map) \
dl_url_file_map = make_string_hash_table (0); \
} while (0)
/* Return 1 if S1 and S2 are the same, except for "/index.html". The
three cases in which it returns one are (substitute any substring
for "foo"):
m("foo/index.html", "foo/") ==> 1
m("foo/", "foo/index.html") ==> 1
m("foo", "foo/index.html") ==> 1
m("foo", "foo/" ==> 1
m("foo", "foo") ==> 1 */
static int
match_except_index (const char *s1, const char *s2)
{
int i;
const char *lng;
/* Skip common substring. */
for (i = 0; *s1 && *s2 && *s1 == *s2; s1++, s2++, i++)
;
if (i == 0)
/* Strings differ at the very beginning -- bail out. We need to
check this explicitly to avoid `lng - 1' reading outside the
array. */
return 0;
if (!*s1 && !*s2)
/* Both strings hit EOF -- strings are equal. */
return 1;
else if (*s1 && *s2)
/* Strings are randomly different, e.g. "/foo/bar" and "/foo/qux". */
return 0;
else if (*s1)
/* S1 is the longer one. */
lng = s1;
else
/* S2 is the longer one. */
lng = s2;
/* foo */ /* foo/ */
/* foo/index.html */ /* or */ /* foo/index.html */
/* ^ */ /* ^ */
if (*lng != '/')
/* The right-hand case. */
--lng;
if (*lng == '/' && *(lng + 1) == '\0')
/* foo */
/* foo/ */
return 1;
return 0 == strcmp (lng, "/index.html");
}
static int
dissociate_urls_from_file_mapper (void *key, void *value, void *arg)
{
char *mapping_url = (char *)key;
char *mapping_file = (char *)value;
char *file = (char *)arg;
if (0 == strcmp (mapping_file, file))
{
hash_table_remove (dl_url_file_map, mapping_url);
xfree (mapping_url);
xfree (mapping_file);
}
/* Continue mapping. */
return 0;
}
/* Remove all associations from various URLs to FILE from dl_url_file_map. */
static void
dissociate_urls_from_file (const char *file)
{
hash_table_map (dl_url_file_map, dissociate_urls_from_file_mapper,
(char *)file);
}
/* Register that URL has been successfully downloaded to FILE. This
is used by the link conversion code to convert references to URLs
to references to local files. It is also being used to check if a
URL has already been downloaded. */
void
register_download (const char *url, const char *file)
{
char *old_file, *old_url;
ENSURE_TABLES_EXIST;
/* With some forms of retrieval, it is possible, although not likely
or particularly desirable. If both are downloaded, the second
download will override the first one. When that happens,
dissociate the old file name from the URL. */
if (hash_table_get_pair (dl_file_url_map, file, &old_file, &old_url))
{
if (0 == strcmp (url, old_url))
/* We have somehow managed to download the same URL twice.
Nothing to do. */
return;
if (match_except_index (url, old_url)
&& !hash_table_contains (dl_url_file_map, url))
/* The two URLs differ only in the "index.html" ending. For
example, one is "http://www.server.com/", and the other is
"http://www.server.com/index.html". Don't remove the old
one, just add the new one as a non-canonical entry. */
goto url_only;
hash_table_remove (dl_file_url_map, file);
xfree (old_file);
xfree (old_url);
/* Remove all the URLs that point to this file. Yes, there can
be more than one such URL, because we store redirections as
multiple entries in dl_url_file_map. For example, if URL1
redirects to URL2 which gets downloaded to FILE, we map both
URL1 and URL2 to FILE in dl_url_file_map. (dl_file_url_map
only points to URL2.) When another URL gets loaded to FILE,
we want both URL1 and URL2 dissociated from it.
This is a relatively expensive operation because it performs
a linear search of the whole hash table, but it should be
called very rarely, only when two URLs resolve to the same
file name, *and* the "<file>.1" extensions are turned off.
In other words, almost never. */
dissociate_urls_from_file (file);
}
hash_table_put (dl_file_url_map, xstrdup (file), xstrdup (url));
url_only:
/* A URL->FILE mapping is not possible without a FILE->URL mapping.
If the latter were present, it should have been removed by the
above `if'. So we could write:
assert (!hash_table_contains (dl_url_file_map, url));
The above is correct when running in recursive mode where the
same URL always resolves to the same file. But if you do
something like:
wget URL URL
then the first URL will resolve to "FILE", and the other to
"FILE.1". In that case, FILE.1 will not be found in
dl_file_url_map, but URL will still point to FILE in
dl_url_file_map. */
if (hash_table_get_pair (dl_url_file_map, url, &old_url, &old_file))
{
hash_table_remove (dl_url_file_map, url);
xfree (old_url);
xfree (old_file);
}
hash_table_put (dl_url_file_map, xstrdup (url), xstrdup (file));
}
/* Register that FROM has been redirected to TO. This assumes that TO
is successfully downloaded and already registered using
register_download() above. */
void
register_redirection (const char *from, const char *to)
{
char *file;
ENSURE_TABLES_EXIST;
file = hash_table_get (dl_url_file_map, to);
assert (file != NULL);
if (!hash_table_contains (dl_url_file_map, from))
hash_table_put (dl_url_file_map, xstrdup (from), xstrdup (file));
}
/* Register that the file has been deleted. */
static void
register_delete_file (const char *file)
{
char *old_url, *old_file;
ENSURE_TABLES_EXIST;
if (!hash_table_get_pair (dl_file_url_map, file, &old_file, &old_url))
return;
hash_table_remove (dl_file_url_map, file);
xfree (old_file);
xfree (old_url);
dissociate_urls_from_file (file);
}
/* Register that FILE is an HTML file that has been downloaded. */
void
register_html (const char *url, const char *file)
{
if (!downloaded_html_set)
downloaded_html_set = make_string_hash_table (0);
else if (hash_table_contains (downloaded_html_set, file))
return;
/* The set and the list should use the same copy of FILE, but the
slist interface insists on strduping the string it gets. Oh
well. */
string_set_add (downloaded_html_set, file);
downloaded_html_list = slist_prepend (downloaded_html_list, file);
}
/* This function is called when the retrieval is done to convert the
links that have been downloaded. It has to be called at the end of
the retrieval, because only then does Wget know conclusively which
URLs have been downloaded, and which not, so it can tell which
direction to convert to.
The "direction" means that the URLs to the files that have been
downloaded get converted to the relative URL which will point to
that file. And the other URLs get converted to the remote URL on
the server.
All the downloaded HTMLs are kept in downloaded_html_files, and
downloaded URLs in urls_downloaded. All the information is
extracted from these two lists. */
void
convert_all_links (void)
{
slist *html;
long msecs;
int file_count = 0;
struct wget_timer *timer = wtimer_new ();
/* Destructively reverse downloaded_html_files to get it in the right order.
recursive_retrieve() used slist_prepend() consistently. */
downloaded_html_list = slist_nreverse (downloaded_html_list);
for (html = downloaded_html_list; html; html = html->next)
{
struct urlpos *urls, *cur_url;
char *url;
char *file = html->string;
/* Determine the URL of the HTML file. get_urls_html will need
it. */
url = hash_table_get (dl_file_url_map, file);
if (!url)
{
DEBUGP (("Apparently %s has been removed.\n", file));
continue;
}
DEBUGP (("Scanning %s (from %s)\n", file, url));
/* Parse the HTML file... */
urls = get_urls_html (file, url, NULL);
/* We don't respect meta_disallow_follow here because, even if
the file is not followed, we might still want to convert the
links that have been followed from other files. */
for (cur_url = urls; cur_url; cur_url = cur_url->next)
{
char *local_name;
struct url *u = cur_url->url;
if (cur_url->link_base_p)
{
/* Base references have been resolved by our parser, so
we turn the base URL into an empty string. (Perhaps
we should remove the tag entirely?) */
cur_url->convert = CO_NULLIFY_BASE;
continue;
}
/* We decide the direction of conversion according to whether
a URL was downloaded. Downloaded URLs will be converted
ABS2REL, whereas non-downloaded will be converted REL2ABS. */
local_name = hash_table_get (dl_url_file_map, u->url);
/* Decide on the conversion type. */
if (local_name)
{
/* We've downloaded this URL. Convert it to relative
form. We do this even if the URL already is in
relative form, because our directory structure may
not be identical to that on the server (think `-nd',
`--cut-dirs', etc.) */
cur_url->convert = CO_CONVERT_TO_RELATIVE;
cur_url->local_name = xstrdup (local_name);
DEBUGP (("will convert url %s to local %s\n", u->url, local_name));
}
else
{
/* We haven't downloaded this URL. If it's not already
complete (including a full host name), convert it to
that form, so it can be reached while browsing this
HTML locally. */
if (!cur_url->link_complete_p)
cur_url->convert = CO_CONVERT_TO_COMPLETE;
cur_url->local_name = NULL;
DEBUGP (("will convert url %s to complete\n", u->url));
}
}
/* Convert the links in the file. */
convert_links (file, urls);
++file_count;
/* Free the data. */
free_urlpos (urls);
}
msecs = wtimer_elapsed (timer);
wtimer_delete (timer);
logprintf (LOG_VERBOSE, _("Converted %d files in %.2f seconds.\n"),
file_count, (double)msecs / 1000);
}
/* Cleanup the data structures associated with recursive retrieving
(the variables above). */
void
recursive_cleanup (void)
{
if (dl_file_url_map)
{
free_keys_and_values (dl_file_url_map);
hash_table_destroy (dl_file_url_map);
dl_file_url_map = NULL;
}
if (dl_url_file_map)
{
free_keys_and_values (dl_url_file_map);
hash_table_destroy (dl_url_file_map);
dl_url_file_map = NULL;
}
if (downloaded_html_set)
string_set_free (downloaded_html_set);
slist_free (downloaded_html_list);
downloaded_html_list = NULL;
}

10
src/recur.h
View File

@ -30,12 +30,14 @@ so, delete this exception statement from your version. */
#ifndef RECUR_H
#define RECUR_H
struct urlpos;
void recursive_cleanup PARAMS ((void));
uerr_t retrieve_tree PARAMS ((const char *));
void register_download PARAMS ((const char *, const char *));
void register_redirection PARAMS ((const char *, const char *));
void register_html PARAMS ((const char *, const char *));
void convert_all_links PARAMS ((void));
/* These are really in html-url.c. */
struct urlpos *get_urls_file PARAMS ((const char *));
struct urlpos *get_urls_html PARAMS ((const char *, const char *, int *));
void free_urlpos PARAMS ((struct urlpos *));
#endif /* RECUR_H */

101
src/retr.c
View File

@ -53,6 +53,7 @@ so, delete this exception statement from your version. */
#include "host.h"
#include "connect.h"
#include "hash.h"
#include "convert.h"
#ifdef HAVE_SSL
# include "gen_sslfunc.h" /* for ssl_iread */
@ -325,6 +326,8 @@ calc_rate (long bytes, double msecs, int *units)
} \
} while (0)
static char *getproxy PARAMS ((struct url *));
/* Retrieve the given URL. Decides which loop to call -- HTTP, FTP,
FTP, proxy, etc. */
@ -682,3 +685,101 @@ sleep_between_retrievals (int count)
}
}
}
/* Free the linked list of urlpos. */
void
free_urlpos (struct urlpos *l)
{
while (l)
{
struct urlpos *next = l->next;
if (l->url)
url_free (l->url);
FREE_MAYBE (l->local_name);
xfree (l);
l = next;
}
}
/* Rotate FNAME opt.backups times */
void
rotate_backups(const char *fname)
{
int maxlen = strlen (fname) + 1 + numdigit (opt.backups) + 1;
char *from = (char *)alloca (maxlen);
char *to = (char *)alloca (maxlen);
struct stat sb;
int i;
if (stat (fname, &sb) == 0)
if (S_ISREG (sb.st_mode) == 0)
return;
for (i = opt.backups; i > 1; i--)
{
sprintf (from, "%s.%d", fname, i - 1);
sprintf (to, "%s.%d", fname, i);
rename (from, to);
}
sprintf (to, "%s.%d", fname, 1);
rename(fname, to);
}
static int no_proxy_match PARAMS ((const char *, const char **));
/* Return the URL of the proxy appropriate for url U. */
static char *
getproxy (struct url *u)
{
char *proxy = NULL;
char *rewritten_url;
static char rewritten_storage[1024];
if (!opt.use_proxy)
return NULL;
if (!no_proxy_match (u->host, (const char **)opt.no_proxy))
return NULL;
switch (u->scheme)
{
case SCHEME_HTTP:
proxy = opt.http_proxy ? opt.http_proxy : getenv ("http_proxy");
break;
#ifdef HAVE_SSL
case SCHEME_HTTPS:
proxy = opt.https_proxy ? opt.https_proxy : getenv ("https_proxy");
break;
#endif
case SCHEME_FTP:
proxy = opt.ftp_proxy ? opt.ftp_proxy : getenv ("ftp_proxy");
break;
case SCHEME_INVALID:
break;
}
if (!proxy || !*proxy)
return NULL;
/* Handle shorthands. `rewritten_storage' is a kludge to allow
getproxy() to return static storage. */
rewritten_url = rewrite_shorthand_url (proxy);
if (rewritten_url)
{
strncpy (rewritten_storage, rewritten_url, sizeof(rewritten_storage));
rewritten_storage[sizeof (rewritten_storage) - 1] = '\0';
proxy = rewritten_storage;
}
return proxy;
}
/* Should a host be accessed through proxy, concerning no_proxy? */
int
no_proxy_match (const char *host, const char **no_proxy)
{
if (!no_proxy)
return 1;
else
return !sufmatch (no_proxy, host);
}

2
src/retr.h
View File

@ -48,6 +48,8 @@ int downloaded_exceeds_quota PARAMS ((void));
void sleep_between_retrievals PARAMS ((int));
void rotate_backups PARAMS ((const char *));
/* Because there's no http.h. */
struct url;

715
src/url.c
View File

@ -76,10 +76,7 @@ static struct scheme_data supported_schemes[] =
/* Forward declarations: */
static char *construct_relative PARAMS ((const char *, const char *));
static int path_simplify PARAMS ((char *));
/* Support for encoding and decoding of URL strings. We determine
whether a character is unsafe through static table lookup. This
@ -1234,128 +1231,6 @@ url_free (struct url *url)
xfree (url);
}
struct urlpos *
get_urls_file (const char *file)
{
struct file_memory *fm;
struct urlpos *head, *tail;
const char *text, *text_end;
/* Load the file. */
fm = read_file (file);
if (!fm)
{
logprintf (LOG_NOTQUIET, "%s: %s\n", file, strerror (errno));
return NULL;
}
DEBUGP (("Loaded %s (size %ld).\n", file, fm->length));
head = tail = NULL;
text = fm->content;
text_end = fm->content + fm->length;
while (text < text_end)
{
const char *line_beg = text;
const char *line_end = memchr (text, '\n', text_end - text);
if (!line_end)
line_end = text_end;
else
++line_end;
text = line_end;
/* Strip whitespace from the beginning and end of line. */
while (line_beg < line_end && ISSPACE (*line_beg))
++line_beg;
while (line_end > line_beg && ISSPACE (*(line_end - 1)))
--line_end;
if (line_end > line_beg)
{
/* URL is in the [line_beg, line_end) region. */
int up_error_code;
char *url_text;
struct urlpos *entry;
struct url *url;
/* We must copy the URL to a zero-terminated string, and we
can't use alloca because we're in a loop. *sigh*. */
url_text = strdupdelim (line_beg, line_end);
if (opt.base_href)
{
/* Merge opt.base_href with URL. */
char *merged = uri_merge (opt.base_href, url_text);
xfree (url_text);
url_text = merged;
}
url = url_parse (url_text, &up_error_code);
if (!url)
{
logprintf (LOG_NOTQUIET, "%s: Invalid URL %s: %s\n",
file, url_text, url_error (up_error_code));
xfree (url_text);
continue;
}
xfree (url_text);
entry = (struct urlpos *)xmalloc (sizeof (struct urlpos));
memset (entry, 0, sizeof (*entry));
entry->next = NULL;
entry->url = url;
if (!head)
head = entry;
else
tail->next = entry;
tail = entry;
}
}
read_file_free (fm);
return head;
}
/* Free the linked list of urlpos. */
void
free_urlpos (struct urlpos *l)
{
while (l)
{
struct urlpos *next = l->next;
if (l->url)
url_free (l->url);
FREE_MAYBE (l->local_name);
xfree (l);
l = next;
}
}
/* Rotate FNAME opt.backups times */
void
rotate_backups(const char *fname)
{
int maxlen = strlen (fname) + 1 + numdigit (opt.backups) + 1;
char *from = (char *)alloca (maxlen);
char *to = (char *)alloca (maxlen);
struct stat sb;
int i;
if (stat (fname, &sb) == 0)
if (S_ISREG (sb.st_mode) == 0)
return;
for (i = opt.backups; i > 1; i--)
{
sprintf (from, "%s.%d", fname, i - 1);
sprintf (to, "%s.%d", fname, i);
rename (from, to);
}
sprintf (to, "%s.%d", fname, 1);
rename(fname, to);
}
/* Create all the necessary directories for PATH (a file). Calls
mkdirhier() internally. */
int
@ -2168,596 +2043,6 @@ url_string (const struct url *url, int hide_password)
return result;
}
/* Return the URL of the proxy appropriate for url U. */
char *
getproxy (struct url *u)
{
char *proxy = NULL;
char *rewritten_url;
static char rewritten_storage[1024];
if (!opt.use_proxy)
return NULL;
if (!no_proxy_match (u->host, (const char **)opt.no_proxy))
return NULL;
switch (u->scheme)
{
case SCHEME_HTTP:
proxy = opt.http_proxy ? opt.http_proxy : getenv ("http_proxy");
break;
#ifdef HAVE_SSL
case SCHEME_HTTPS:
proxy = opt.https_proxy ? opt.https_proxy : getenv ("https_proxy");
break;
#endif
case SCHEME_FTP:
proxy = opt.ftp_proxy ? opt.ftp_proxy : getenv ("ftp_proxy");
break;
case SCHEME_INVALID:
break;
}
if (!proxy || !*proxy)
return NULL;
/* Handle shorthands. `rewritten_storage' is a kludge to allow
getproxy() to return static storage. */
rewritten_url = rewrite_shorthand_url (proxy);
if (rewritten_url)
{
strncpy (rewritten_storage, rewritten_url, sizeof(rewritten_storage));
rewritten_storage[sizeof (rewritten_storage) - 1] = '\0';
proxy = rewritten_storage;
}
return proxy;
}
/* Should a host be accessed through proxy, concerning no_proxy? */
int
no_proxy_match (const char *host, const char **no_proxy)
{
if (!no_proxy)
return 1;
else
return !sufmatch (no_proxy, host);
}
/* Support for converting links for local viewing in downloaded HTML
files. This should be moved to another file, because it has
nothing to do with processing URLs. */
static void write_backup_file PARAMS ((const char *, downloaded_file_t));
static const char *replace_attr PARAMS ((const char *, int, FILE *,
const char *));
static const char *replace_attr_refresh_hack PARAMS ((const char *, int, FILE *,
const char *, int));
static char *local_quote_string PARAMS ((const char *));
/* Change the links in one HTML file. LINKS is a list of links in the
document, along with their positions and the desired direction of
the conversion. */
void
convert_links (const char *file, struct urlpos *links)
{
struct file_memory *fm;
FILE *fp;
const char *p;
downloaded_file_t downloaded_file_return;
struct urlpos *link;
int to_url_count = 0, to_file_count = 0;
logprintf (LOG_VERBOSE, _("Converting %s... "), file);
{
/* First we do a "dry run": go through the list L and see whether
any URL needs to be converted in the first place. If not, just
leave the file alone. */
int dry_count = 0;
struct urlpos *dry = links;
for (dry = links; dry; dry = dry->next)
if (dry->convert != CO_NOCONVERT)
++dry_count;
if (!dry_count)
{
logputs (LOG_VERBOSE, _("nothing to do.\n"));
return;
}
}
fm = read_file (file);
if (!fm)
{
logprintf (LOG_NOTQUIET, _("Cannot convert links in %s: %s\n"),
file, strerror (errno));
return;
}
downloaded_file_return = downloaded_file (CHECK_FOR_FILE, file);
if (opt.backup_converted && downloaded_file_return)
write_backup_file (file, downloaded_file_return);
/* Before opening the file for writing, unlink the file. This is
important if the data in FM is mmaped. In such case, nulling the
file, which is what fopen() below does, would make us read all
zeroes from the mmaped region. */
if (unlink (file) < 0 && errno != ENOENT)
{
logprintf (LOG_NOTQUIET, _("Unable to delete `%s': %s\n"),
file, strerror (errno));
read_file_free (fm);
return;
}
/* Now open the file for writing. */
fp = fopen (file, "wb");
if (!fp)
{
logprintf (LOG_NOTQUIET, _("Cannot convert links in %s: %s\n"),
file, strerror (errno));
read_file_free (fm);
return;
}
/* Here we loop through all the URLs in file, replacing those of
them that are downloaded with relative references. */
p = fm->content;
for (link = links; link; link = link->next)
{
char *url_start = fm->content + link->pos;
if (link->pos >= fm->length)
{
DEBUGP (("Something strange is going on. Please investigate."));
break;
}
/* If the URL is not to be converted, skip it. */
if (link->convert == CO_NOCONVERT)
{
DEBUGP (("Skipping %s at position %d.\n", link->url->url, link->pos));
continue;
}
/* Echo the file contents, up to the offending URL's opening
quote, to the outfile. */
fwrite (p, 1, url_start - p, fp);
p = url_start;
switch (link->convert)
{
case CO_CONVERT_TO_RELATIVE:
/* Convert absolute URL to relative. */
{
char *newname = construct_relative (file, link->local_name);
char *quoted_newname = local_quote_string (newname);
if (!link->link_refresh_p)
p = replace_attr (p, link->size, fp, quoted_newname);
else
p = replace_attr_refresh_hack (p, link->size, fp, quoted_newname,
link->refresh_timeout);
DEBUGP (("TO_RELATIVE: %s to %s at position %d in %s.\n",
link->url->url, newname, link->pos, file));
xfree (newname);
xfree (quoted_newname);
++to_file_count;
break;
}
case CO_CONVERT_TO_COMPLETE:
/* Convert the link to absolute URL. */
{
char *newlink = link->url->url;
char *quoted_newlink = html_quote_string (newlink);
if (!link->link_refresh_p)
p = replace_attr (p, link->size, fp, quoted_newlink);
else
p = replace_attr_refresh_hack (p, link->size, fp, quoted_newlink,
link->refresh_timeout);
DEBUGP (("TO_COMPLETE: <something> to %s at position %d in %s.\n",
newlink, link->pos, file));
xfree (quoted_newlink);
++to_url_count;
break;
}
case CO_NULLIFY_BASE:
/* Change the base href to "". */
p = replace_attr (p, link->size, fp, "");
break;
case CO_NOCONVERT:
abort ();
break;
}
}
/* Output the rest of the file. */
if (p - fm->content < fm->length)
fwrite (p, 1, fm->length - (p - fm->content), fp);
fclose (fp);
read_file_free (fm);
logprintf (LOG_VERBOSE, "%d-%d\n", to_file_count, to_url_count);
}
/* Construct and return a malloced copy of the relative link from two
pieces of information: local name S1 of the referring file and
local name S2 of the referred file.
So, if S1 is "jagor.srce.hr/index.html" and S2 is
"jagor.srce.hr/images/news.gif", the function will return
"images/news.gif".
Alternately, if S1 is "fly.cc.fer.hr/ioccc/index.html", and S2 is
"fly.cc.fer.hr/images/fly.gif", the function will return
"../images/fly.gif".
Caveats: S1 should not begin with `/', unless S2 also begins with
'/'. S1 should not contain things like ".." and such --
construct_relative ("fly/ioccc/../index.html",
"fly/images/fly.gif") will fail. (A workaround is to call
something like path_simplify() on S1). */
static char *
construct_relative (const char *s1, const char *s2)
{
int i, cnt, sepdirs1;
char *res;
if (*s2 == '/')
return xstrdup (s2);
/* S1 should *not* be absolute, if S2 wasn't. */
assert (*s1 != '/');
i = cnt = 0;
/* Skip the directories common to both strings. */
while (1)
{
while (s1[i] && s2[i]
&& (s1[i] == s2[i])
&& (s1[i] != '/')
&& (s2[i] != '/'))
++i;
if (s1[i] == '/' && s2[i] == '/')
cnt = ++i;
else
break;
}
for (sepdirs1 = 0; s1[i]; i++)
if (s1[i] == '/')
++sepdirs1;
/* Now, construct the file as of:
- ../ repeated sepdirs1 time
- all the non-mutual directories of S2. */
res = (char *)xmalloc (3 * sepdirs1 + strlen (s2 + cnt) + 1);
for (i = 0; i < sepdirs1; i++)
memcpy (res + 3 * i, "../", 3);
strcpy (res + 3 * i, s2 + cnt);
return res;
}
static void
write_backup_file (const char *file, downloaded_file_t downloaded_file_return)
{
/* Rather than just writing over the original .html file with the
converted version, save the former to *.orig. Note we only do
this for files we've _successfully_ downloaded, so we don't
clobber .orig files sitting around from previous invocations. */
/* Construct the backup filename as the original name plus ".orig". */
size_t filename_len = strlen(file);
char* filename_plus_orig_suffix;
boolean already_wrote_backup_file = FALSE;
slist* converted_file_ptr;
static slist* converted_files = NULL;
if (downloaded_file_return == FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED)
{
/* Just write "orig" over "html". We need to do it this way
because when we're checking to see if we've downloaded the
file before (to see if we can skip downloading it), we don't
know if it's a text/html file. Therefore we don't know yet
at that stage that -E is going to cause us to tack on
".html", so we need to compare vs. the original URL plus
".orig", not the original URL plus ".html.orig". */
filename_plus_orig_suffix = alloca (filename_len + 1);
strcpy(filename_plus_orig_suffix, file);
strcpy((filename_plus_orig_suffix + filename_len) - 4, "orig");
}
else /* downloaded_file_return == FILE_DOWNLOADED_NORMALLY */
{
/* Append ".orig" to the name. */
filename_plus_orig_suffix = alloca (filename_len + sizeof(".orig"));
strcpy(filename_plus_orig_suffix, file);
strcpy(filename_plus_orig_suffix + filename_len, ".orig");
}
/* We can get called twice on the same URL thanks to the
convert_all_links() call in main(). If we write the .orig file
each time in such a case, it'll end up containing the first-pass
conversion, not the original file. So, see if we've already been
called on this file. */
converted_file_ptr = converted_files;
while (converted_file_ptr != NULL)
if (strcmp(converted_file_ptr->string, file) == 0)
{
already_wrote_backup_file = TRUE;
break;
}
else
converted_file_ptr = converted_file_ptr->next;
if (!already_wrote_backup_file)
{
/* Rename <file> to <file>.orig before former gets written over. */
if (rename(file, filename_plus_orig_suffix) != 0)
logprintf (LOG_NOTQUIET, _("Cannot back up %s as %s: %s\n"),
file, filename_plus_orig_suffix, strerror (errno));
/* Remember that we've already written a .orig backup for this file.
Note that we never free this memory since we need it till the
convert_all_links() call, which is one of the last things the
program does before terminating. BTW, I'm not sure if it would be
safe to just set 'converted_file_ptr->string' to 'file' below,
rather than making a copy of the string... Another note is that I
thought I could just add a field to the urlpos structure saying
that we'd written a .orig file for this URL, but that didn't work,
so I had to make this separate list.
-- Dan Harkless <wget@harkless.org>
This [adding a field to the urlpos structure] didn't work
because convert_file() is called from convert_all_links at
the end of the retrieval with a freshly built new urlpos
list.
-- Hrvoje Niksic <hniksic@arsdigita.com>
*/
converted_file_ptr = xmalloc(sizeof(*converted_file_ptr));
converted_file_ptr->string = xstrdup(file); /* die on out-of-mem. */
converted_file_ptr->next = converted_files;
converted_files = converted_file_ptr;
}
}
static int find_fragment PARAMS ((const char *, int, const char **,
const char **));
/* Replace an attribute's original text with NEW_TEXT. */
static const char *
replace_attr (const char *p, int size, FILE *fp, const char *new_text)
{
int quote_flag = 0;
char quote_char = '\"'; /* use "..." for quoting, unless the
original value is quoted, in which
case reuse its quoting char. */
const char *frag_beg, *frag_end;
/* Structure of our string is:
"...old-contents..."
<--- size ---> (with quotes)
OR:
...old-contents...
<--- size --> (no quotes) */
if (*p == '\"' || *p == '\'')
{
quote_char = *p;
quote_flag = 1;
++p;
size -= 2; /* disregard opening and closing quote */
}
putc (quote_char, fp);
fputs (new_text, fp);
/* Look for fragment identifier, if any. */
if (find_fragment (p, size, &frag_beg, &frag_end))
fwrite (frag_beg, 1, frag_end - frag_beg, fp);
p += size;
if (quote_flag)
++p;
putc (quote_char, fp);
return p;
}
/* The same as REPLACE_ATTR, but used when replacing
<meta http-equiv=refresh content="new_text"> because we need to
append "timeout_value; URL=" before the next_text. */
static const char *
replace_attr_refresh_hack (const char *p, int size, FILE *fp,
const char *new_text, int timeout)
{
/* "0; URL=..." */
char *new_with_timeout = (char *)alloca (numdigit (timeout)
+ 6 /* "; URL=" */
+ strlen (new_text)
+ 1);
sprintf (new_with_timeout, "%d; URL=%s", timeout, new_text);
return replace_attr (p, size, fp, new_with_timeout);
}
/* Find the first occurrence of '#' in [BEG, BEG+SIZE) that is not
preceded by '&'. If the character is not found, return zero. If
the character is found, return 1 and set BP and EP to point to the
beginning and end of the region.
This is used for finding the fragment indentifiers in URLs. */
static int
find_fragment (const char *beg, int size, const char **bp, const char **ep)
{
const char *end = beg + size;
int saw_amp = 0;
for (; beg < end; beg++)
{
switch (*beg)
{
case '&':
saw_amp = 1;
break;
case '#':
if (!saw_amp)
{
*bp = beg;
*ep = end;
return 1;
}
/* fallthrough */
default:
saw_amp = 0;
}
}
return 0;
}
/* Quote FILE for use as local reference to an HTML file.
We quote ? as %3F to avoid passing part of the file name as the
parameter when browsing the converted file through HTTP. However,
it is safe to do this only when `--html-extension' is turned on.
This is because converting "index.html?foo=bar" to
"index.html%3Ffoo=bar" would break local browsing, as the latter
isn't even recognized as an HTML file! However, converting
"index.html?foo=bar.html" to "index.html%3Ffoo=bar.html" should be
safe for both local and HTTP-served browsing. */
static char *
local_quote_string (const char *file)
{
const char *file_sans_qmark;
int qm;
if (!opt.html_extension)
return html_quote_string (file);
qm = count_char (file, '?');
if (qm)
{
const char *from = file;
char *to, *newname;
/* qm * 2 because we replace each question mark with "%3F",
i.e. replace one char with three, hence two more. */
int fsqlen = strlen (file) + qm * 2;
to = newname = (char *)alloca (fsqlen + 1);
for (; *from; from++)
{
if (*from != '?')
*to++ = *from;
else
{
*to++ = '%';
*to++ = '3';
*to++ = 'F';
}
}
assert (to - newname == fsqlen);
*to = '\0';
file_sans_qmark = newname;
}
else
file_sans_qmark = file;
return html_quote_string (file_sans_qmark);
}
/* We're storing "modes" of type downloaded_file_t in the hash table.
However, our hash tables only accept pointers for keys and values.
So when we need a pointer, we use the address of a
downloaded_file_t variable of static storage. */
static downloaded_file_t *
downloaded_mode_to_ptr (downloaded_file_t mode)
{
static downloaded_file_t
v1 = FILE_NOT_ALREADY_DOWNLOADED,
v2 = FILE_DOWNLOADED_NORMALLY,
v3 = FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED,
v4 = CHECK_FOR_FILE;
switch (mode)
{
case FILE_NOT_ALREADY_DOWNLOADED:
return &v1;
case FILE_DOWNLOADED_NORMALLY:
return &v2;
case FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED:
return &v3;
case CHECK_FOR_FILE:
return &v4;
}
return NULL;
}
/* This should really be merged with dl_file_url_map and
downloaded_html_files in recur.c. This was originally a list, but
I changed it to a hash table beause it was actually taking a lot of
time to find things in it. */
static struct hash_table *downloaded_files_hash;
/* Remembers which files have been downloaded. In the standard case, should be
called with mode == FILE_DOWNLOADED_NORMALLY for each file we actually
download successfully (i.e. not for ones we have failures on or that we skip
due to -N).
When we've downloaded a file and tacked on a ".html" extension due to -E,
call this function with FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED rather than
FILE_DOWNLOADED_NORMALLY.
If you just want to check if a file has been previously added without adding
it, call with mode == CHECK_FOR_FILE. Please be sure to call this function
with local filenames, not remote URLs. */
downloaded_file_t
downloaded_file (downloaded_file_t mode, const char *file)
{
downloaded_file_t *ptr;
if (mode == CHECK_FOR_FILE)
{
if (!downloaded_files_hash)
return FILE_NOT_ALREADY_DOWNLOADED;
ptr = hash_table_get (downloaded_files_hash, file);
if (!ptr)
return FILE_NOT_ALREADY_DOWNLOADED;
return *ptr;
}
if (!downloaded_files_hash)
downloaded_files_hash = make_string_hash_table (0);
ptr = hash_table_get (downloaded_files_hash, file);
if (ptr)
return *ptr;
ptr = downloaded_mode_to_ptr (mode);
hash_table_put (downloaded_files_hash, xstrdup (file), &ptr);
return FILE_NOT_ALREADY_DOWNLOADED;
}
static int
df_free_mapper (void *key, void *value, void *ignored)
{
xfree (key);
return 0;
}
void
downloaded_files_free (void)
{
if (downloaded_files_hash)
{
hash_table_map (downloaded_files_hash, df_free_mapper, NULL);
hash_table_destroy (downloaded_files_hash);
downloaded_files_hash = NULL;
}
}
/* Return non-zero if scheme a is similar to scheme b.
Schemes are similar if they are equal. If SSL is supported, schemes

72
src/url.h
View File

@ -71,63 +71,6 @@ struct url
char *passwd;
};
enum convert_options {
CO_NOCONVERT = 0, /* don't convert this URL */
CO_CONVERT_TO_RELATIVE, /* convert to relative, e.g. to
"../../otherdir/foo.gif" */
CO_CONVERT_TO_COMPLETE, /* convert to absolute, e.g. to
"http://orighost/somedir/bar.jpg". */
CO_NULLIFY_BASE /* change to empty string. */
};
/* A structure that defines the whereabouts of a URL, i.e. its
position in an HTML document, etc. */
struct urlpos {
struct url *url; /* the URL of the link, after it has
been merged with the base */
char *local_name; /* local file to which it was saved
(used by convert_links) */
/* reserved for special links such as <base href="..."> which are
used when converting links, but ignored when downloading. */
unsigned int ignore_when_downloading :1;
/* Information about the original link: */
unsigned int link_relative_p :1; /* was the link relative? */
unsigned int link_complete_p :1; /* was the link complete (with the
host name, etc.) */
unsigned int link_base_p :1; /* was the link <base href=...> */
unsigned int link_inline_p :1; /* needed to render the page. */
unsigned int link_refresh_p :1; /* link was received from
<meta http-equiv=refresh content=...> */
int refresh_timeout; /* for reconstructing the refresh. */
/* Conversion requirements: */
enum convert_options convert; /* is conversion required? */
/* URL's position in the buffer. */
int pos, size;
struct urlpos *next; /* next list element */
};
/* downloaded_file() takes a parameter of this type and returns this type. */
typedef enum
{
/* Return enumerators: */
FILE_NOT_ALREADY_DOWNLOADED = 0,
/* Return / parameter enumerators: */
FILE_DOWNLOADED_NORMALLY,
FILE_DOWNLOADED_AND_HTML_EXTENSION_ADDED,
/* Parameter enumerators: */
CHECK_FOR_FILE
} downloaded_file_t;
/* Function declarations */
char *url_escape PARAMS ((const char *));
@ -145,26 +88,13 @@ int scheme_default_port PARAMS ((enum url_scheme));
void scheme_disable PARAMS ((enum url_scheme));
char *url_string PARAMS ((const struct url *, int));
struct urlpos *get_urls_file PARAMS ((const char *));
struct urlpos *get_urls_html PARAMS ((const char *, const char *, int *));
void free_urlpos PARAMS ((struct urlpos *));
char *url_file_name PARAMS ((const struct url *));
char *uri_merge PARAMS ((const char *, const char *));
void rotate_backups PARAMS ((const char *));
int mkalldirs PARAMS ((const char *));
char *url_file_name PARAMS ((const struct url *));
char *getproxy PARAMS ((struct url *));
int no_proxy_match PARAMS ((const char *, const char **));
void convert_links PARAMS ((const char *, struct urlpos *));
downloaded_file_t downloaded_file PARAMS ((downloaded_file_t, const char *));
char *rewrite_shorthand_url PARAMS ((const char *));
int schemes_are_similar_p PARAMS ((enum url_scheme a, enum url_scheme b));
#endif /* URL_H */