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Merge branch 'download'

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This commit is contained in:
Dan McGee 2011-03-16 19:25:35 -05:00
commit cff36093f3
8 changed files with 168 additions and 219 deletions
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31
configure.ac
View File

@ -93,10 +93,10 @@ AC_ARG_WITH(openssl,
AS_HELP_STRING([--with-openssl], [use OpenSSL crypto implementations instead of internal routines]),
[], [with_openssl=check])
# Help line for libfetch
AC_ARG_WITH(fetch,
AS_HELP_STRING([--with-fetch], [use libfetch as an internal downloader]),
[], [with_fetch=check])
# Help line for libcurl
AC_ARG_WITH(curl,
AS_HELP_STRING([--with-curl], [use libcurl as an internal downloader]),
[], [with_curl=check])
# Help line for documentation
AC_ARG_ENABLE(doc,
@ -149,24 +149,17 @@ AS_IF([test "x$with_openssl" != "xno"],
AC_MSG_RESULT(no))
AM_CONDITIONAL([HAVE_LIBSSL], [test "x$ac_cv_lib_ssl_MD5_Final" = "xyes"])
# Enable or disable usage of libfetch
AC_MSG_CHECKING(whether to link with libfetch)
AS_IF([test "x$with_fetch" != "xno"],
# Enable or disable usage of libcurl
AC_MSG_CHECKING(whether to link with libcurl)
AS_IF([test "x$with_curl" != "xno"],
[AC_MSG_RESULT(yes)
AC_CHECK_LIB([fetch], [fetchParseURL], ,
[if test "x$with_fetch" != "xcheck"; then
AC_MSG_FAILURE([--with-fetch was given, but -lfetch was not found])
AC_CHECK_LIB([curl], [curl_easy_perform], ,
[if test "x$with_curl" != "xcheck"; then
AC_MSG_FAILURE([--with-curl was given, but -lcurl was not found])
fi],
[-lcrypto -ldl])
# Check if libfetch supports connnection caching which we use
AS_IF([test "x$ac_cv_lib_fetch_fetchParseURL" = "xyes"],
[AC_CHECK_DECL(fetchConnectionCacheInit, ,
AC_MSG_ERROR([libfetch must be version 2.28 or greater]),
[#include <fetch.h>])
])
],
[-lcurl])],
AC_MSG_RESULT(no))
AM_CONDITIONAL([HAVE_LIBFETCH], [test "x$ac_cv_lib_fetch_fetchParseURL" = "xyes"])
AM_CONDITIONAL([HAVE_LIBCURL], [test "x$ac_cv_lib_curl_curl_easy_perform" = "xyes"])
# Checks for header files.
AC_CHECK_HEADERS([fcntl.h glob.h libintl.h locale.h mntent.h string.h \

14
lib/libalpm/alpm.c
View File

@ -23,9 +23,8 @@
#include "config.h"
/* connection caching setup */
#ifdef HAVE_LIBFETCH
#include <fetch.h>
#ifdef HAVE_LIBCURL
#include <curl/curl.h>
#endif
/* libalpm */
@ -65,8 +64,9 @@ int SYMEXPORT alpm_initialize(void)
bindtextdomain("libalpm", LOCALEDIR);
#endif
#ifdef HAVE_LIBFETCH
fetchConnectionCacheInit(5, 1);
#ifdef HAVE_LIBCURL
curl_global_init(CURL_GLOBAL_SSL);
handle->curl = curl_easy_init();
#endif
return(0);
@ -88,8 +88,8 @@ int SYMEXPORT alpm_release(void)
_alpm_handle_free(handle);
handle = NULL;
#ifdef HAVE_LIBFETCH
fetchConnectionCacheClose();
#ifdef HAVE_LIBCURL
curl_global_cleanup();
#endif
return(0);

1
lib/libalpm/alpm.h
View File

@ -535,6 +535,7 @@ enum _pmerrno_t {
/* External library errors */
PM_ERR_LIBARCHIVE,
PM_ERR_LIBFETCH,
PM_ERR_LIBCURL,
PM_ERR_EXTERNAL_DOWNLOAD
};

310
lib/libalpm/dload.c
View File

@ -35,8 +35,8 @@
#include <sys/param.h> /* MAXHOSTNAMELEN */
#endif
#ifdef HAVE_LIBFETCH
#include <fetch.h>
#ifdef HAVE_LIBCURL
#include <curl/curl.h>
#endif
/* libalpm */
@ -55,7 +55,7 @@ static char *get_filename(const char *url) {
return(filename);
}
#ifdef HAVE_LIBFETCH
#ifdef HAVE_LIBCURL
static char *get_destfile(const char *path, const char *filename) {
char *destfile;
/* len = localpath len + filename len + null */
@ -76,14 +76,8 @@ static char *get_tempfile(const char *path, const char *filename) {
return(tempfile);
}
static const char *gethost(struct url *fileurl)
{
const char *host = _("disk");
if(strcmp(SCHEME_FILE, fileurl->scheme) != 0) {
host = fileurl->host;
}
return(host);
}
#define check_stop() if(dload_interrupted) { ret = -1; goto cleanup; }
enum sighandlers { OLD = 0, NEW = 1 };
int dload_interrupted;
static void inthandler(int signum)
@ -91,59 +85,107 @@ static void inthandler(int signum)
dload_interrupted = 1;
}
#define check_stop() if(dload_interrupted) { ret = -1; goto cleanup; }
enum sighandlers { OLD = 0, NEW = 1 };
static int curl_progress(void *filename, double dltotal, double dlnow,
double ultotal, double ulnow) {
static int download_internal(const char *url, const char *localpath,
int force) {
FILE *localf = NULL;
struct stat st;
int ret = 0;
off_t dl_thisfile = 0;
ssize_t nread = 0;
char *tempfile, *destfile, *filename;
struct sigaction sig_pipe[2], sig_int[2];
/* unused parameters */
(void)ultotal;
(void)ulnow;
off_t local_size = 0;
time_t local_time = 0;
struct url *fileurl;
struct url_stat ust;
fetchIO *dlf = NULL;
char buffer[PM_DLBUF_LEN];
filename = get_filename(url);
if(!filename) {
_alpm_log(PM_LOG_ERROR, _("url '%s' is invalid\n"), url);
RET_ERR(PM_ERR_SERVER_BAD_URL, -1);
if(dltotal == 0) {
return(0);
}
fileurl = fetchParseURL(url);
if(!fileurl) {
if(dload_interrupted) {
return(1);
}
handle->dlcb((const char*)filename, (long)dlnow, (long)dltotal);
return(0);
}
static int curl_gethost(const char *url, char *buffer) {
int hostlen;
char *p;
if(strncmp(url, "file://", 7) == 0) {
strcpy(buffer, _("disk"));
} else {
p = strstr(url, "//");
if(!p) {
return(1);
}
p += 2; /* jump over the found // */
hostlen = strcspn(p, "/");
if(hostlen > 255) {
/* buffer overflow imminent */
_alpm_log(PM_LOG_ERROR, _("buffer overflow detected"));
return(1);
}
snprintf(buffer, hostlen + 1, "%s", p);
}
return(0);
}
static int curl_download_internal(const char *url, const char *localpath,
int force) {
int ret = -1;
FILE *localf = NULL;
char *destfile, *filename, *tempfile;
char hostname[256]; /* RFC1123 states applications should support this length */
struct stat st;
long httpresp, timecond, remote_time, local_time;
double remote_size, bytes_dl;
struct sigaction sig_pipe[2], sig_int[2];
filename = get_filename(url);
if(!filename || curl_gethost(url, hostname) != 0) {
_alpm_log(PM_LOG_ERROR, _("url '%s' is invalid\n"), url);
RET_ERR(PM_ERR_LIBFETCH, -1);
RET_ERR(PM_ERR_SERVER_BAD_URL, -1);
}
destfile = get_destfile(localpath, filename);
tempfile = get_tempfile(localpath, filename);
if(stat(tempfile, &st) == 0 && S_ISREG(st.st_mode) && st.st_size > 0) {
_alpm_log(PM_LOG_DEBUG, "tempfile found, attempting continuation\n");
local_time = fileurl->last_modified = st.st_mtime;
local_size = fileurl->offset = (off_t)st.st_size;
dl_thisfile = st.st_size;
/* the curl_easy handle is initialized with the alpm handle, so we only need
* to reset the curl handle set parameters for each time it's used. */
curl_easy_reset(handle->curl);
curl_easy_setopt(handle->curl, CURLOPT_URL, url);
curl_easy_setopt(handle->curl, CURLOPT_FAILONERROR, 1L);
curl_easy_setopt(handle->curl, CURLOPT_ENCODING, "deflate, gzip");
curl_easy_setopt(handle->curl, CURLOPT_CONNECTTIMEOUT, 10L);
curl_easy_setopt(handle->curl, CURLOPT_FILETIME, 1L);
curl_easy_setopt(handle->curl, CURLOPT_NOPROGRESS, 0L);
curl_easy_setopt(handle->curl, CURLOPT_FOLLOWLOCATION, 1L);
curl_easy_setopt(handle->curl, CURLOPT_PROGRESSFUNCTION, curl_progress);
curl_easy_setopt(handle->curl, CURLOPT_PROGRESSDATA, filename);
if(!force && stat(destfile, &st) == 0) {
/* assume its a sync, so we're starting from scratch. but, only download
* our local is out of date. */
local_time = (long)st.st_mtime;
curl_easy_setopt(handle->curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
curl_easy_setopt(handle->curl, CURLOPT_TIMEVALUE, local_time);
} else if(stat(tempfile, &st) == 0 && st.st_size > 0) {
/* assume its a partial package download. we do not support resuming of
* transfers on partially downloaded sync DBs. */
localf = fopen(tempfile, "ab");
} else if(!force && stat(destfile, &st) == 0 && S_ISREG(st.st_mode) && st.st_size > 0) {
_alpm_log(PM_LOG_DEBUG, "destfile found, using mtime only\n");
local_time = fileurl->last_modified = st.st_mtime;
local_size = /* no fu->off here */ (off_t)st.st_size;
} else {
_alpm_log(PM_LOG_DEBUG, "no file found matching criteria, starting from scratch\n");
curl_easy_setopt(handle->curl, CURLOPT_RESUME_FROM, (long)st.st_size);
_alpm_log(PM_LOG_DEBUG, "tempfile found, attempting continuation");
}
/* pass the raw filename for passing to the callback function */
_alpm_log(PM_LOG_DEBUG, "using '%s' for download progress\n", filename);
/* no destfile and no tempfile. start from scratch */
if(localf == NULL) {
localf = fopen(tempfile, "wb");
if(localf == NULL) {
goto cleanup;
}
}
/* this has to be set _after_ figuring out which file we're opening */
curl_easy_setopt(handle->curl, CURLOPT_WRITEDATA, localf);
/* print proxy info for debug purposes */
_alpm_log(PM_LOG_DEBUG, "HTTP_PROXY: %s\n", getenv("HTTP_PROXY"));
@ -151,9 +193,6 @@ static int download_internal(const char *url, const char *localpath,
_alpm_log(PM_LOG_DEBUG, "FTP_PROXY: %s\n", getenv("FTP_PROXY"));
_alpm_log(PM_LOG_DEBUG, "ftp_proxy: %s\n", getenv("ftp_proxy"));
/* 10s timeout */
fetchTimeout = 10;
/* ignore any SIGPIPE signals- these may occur if our FTP socket dies or
* something along those lines. Store the old signal handler first. */
sig_pipe[NEW].sa_handler = SIG_IGN;
@ -169,146 +208,60 @@ static int download_internal(const char *url, const char *localpath,
sigaction(SIGINT, NULL, &sig_int[OLD]);
sigaction(SIGINT, &sig_int[NEW], NULL);
/* NOTE: libfetch does not reset the error code, be sure to do it before
* calls into the library */
/* TODO: if we call fetchStat() and get a redirect (disabling automagic
* redirect following), we should repeat the file locator stuff and get a new
* filename rather than only base if off the first URL, and then verify
* get_filename() didn't return ''. Of course, libfetch might not even allow
* us to even get that URL...FS#22645. This would allow us to download things
* without totally puking like
* http://www.archlinux.org/packages/community/x86_64/exim/download/ */
/* find out the remote size *and* mtime in one go. there is a lot of
* trouble in trying to do both size and "if-modified-since" logic in a
* non-stat request, so avoid it. */
fetchLastErrCode = 0;
if(fetchStat(fileurl, &ust, "") == -1) {
pm_errno = PM_ERR_LIBFETCH;
_alpm_log(PM_LOG_ERROR, _("failed retrieving file '%s' from %s : %s\n"),
filename, gethost(fileurl), fetchLastErrString);
ret = -1;
goto cleanup;
}
check_stop();
_alpm_log(PM_LOG_DEBUG, "ust.mtime: %ld local_time: %ld compare: %ld\n",
ust.mtime, local_time, local_time - ust.mtime);
_alpm_log(PM_LOG_DEBUG, "ust.size: %jd local_size: %jd compare: %jd\n",
(intmax_t)ust.size, (intmax_t)local_size, (intmax_t)(local_size - ust.size));
if(!force && ust.mtime && ust.mtime == local_time
&& ust.size && ust.size == local_size) {
/* the remote time and size values agreed with what we have, so move on
* because there is nothing more to do. */
_alpm_log(PM_LOG_DEBUG, "files are identical, skipping %s\n", filename);
ret = 1;
goto cleanup;
}
if(!ust.mtime || ust.mtime != local_time) {
_alpm_log(PM_LOG_DEBUG, "mtimes were different or unavailable, downloading %s from beginning\n", filename);
fileurl->offset = 0;
}
fetchLastErrCode = 0;
dlf = fetchGet(fileurl, "");
check_stop();
if(fetchLastErrCode != 0 || dlf == NULL) {
pm_errno = PM_ERR_LIBFETCH;
_alpm_log(PM_LOG_ERROR, _("failed retrieving file '%s' from %s : %s\n"),
filename, gethost(fileurl), fetchLastErrString);
ret = -1;
goto cleanup;
} else {
_alpm_log(PM_LOG_DEBUG, "connected to %s successfully\n", fileurl->host);
}
if(localf && fileurl->offset == 0) {
_alpm_log(PM_LOG_WARNING, _("resuming download of %s not possible; starting over\n"), filename);
fclose(localf);
localf = NULL;
} else if(fileurl->offset) {
_alpm_log(PM_LOG_DEBUG, "resuming download at position %jd\n", (intmax_t)fileurl->offset);
}
if(localf == NULL) {
_alpm_rmrf(tempfile);
fileurl->offset = (off_t)0;
dl_thisfile = 0;
localf = fopen(tempfile, "wb");
if(localf == NULL) { /* still null? */
pm_errno = PM_ERR_RETRIEVE;
_alpm_log(PM_LOG_ERROR, _("error writing to file '%s': %s\n"),
tempfile, strerror(errno));
ret = -1;
goto cleanup;
}
}
/* Progress 0 - initialize */
if(handle->dlcb) {
handle->dlcb(filename, 0, ust.size);
handle->dlcb(filename, 0, 1);
}
while((nread = fetchIO_read(dlf, buffer, PM_DLBUF_LEN)) > 0) {
check_stop();
size_t nwritten = 0;
nwritten = fwrite(buffer, 1, (size_t)nread, localf);
if((nwritten != (size_t)nread) || ferror(localf)) {
pm_errno = PM_ERR_RETRIEVE;
_alpm_log(PM_LOG_ERROR, _("error writing to file '%s': %s\n"),
tempfile, strerror(errno));
ret = -1;
goto cleanup;
}
dl_thisfile += nread;
/* perform transfer */
handle->curlerr = curl_easy_perform(handle->curl);
if(handle->dlcb) {
handle->dlcb(filename, dl_thisfile, ust.size);
}
}
/* retrieve info about the state of the transfer */
curl_easy_getinfo(handle->curl, CURLINFO_HTTP_CODE, &httpresp);
curl_easy_getinfo(handle->curl, CURLINFO_FILETIME, &remote_time);
curl_easy_getinfo(handle->curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &remote_size);
curl_easy_getinfo(handle->curl, CURLINFO_SIZE_DOWNLOAD, &bytes_dl);
curl_easy_getinfo(handle->curl, CURLINFO_CONDITION_UNMET, &timecond);
/* did the transfer complete normally? */
if (nread == -1) {
/* not PM_ERR_LIBFETCH here because libfetch error string might be empty */
pm_errno = PM_ERR_RETRIEVE;
_alpm_log(PM_LOG_ERROR, _("failed retrieving file '%s' from %s\n"),
filename, gethost(fileurl));
ret = -1;
/* time condition was met and we didn't download anything. we need to
* clean up the 0 byte .part file that's left behind. */
if(bytes_dl == 0 && timecond == 1) {
ret = 1;
unlink(tempfile);
goto cleanup;
}
if (ust.size != -1 && dl_thisfile < ust.size) {
if(handle->curlerr == CURLE_ABORTED_BY_CALLBACK) {
goto cleanup;
} else if(handle->curlerr != CURLE_OK) {
pm_errno = PM_ERR_LIBCURL;
_alpm_log(PM_LOG_ERROR, _("failed retrieving file '%s' from %s : %s\n"),
filename, hostname, curl_easy_strerror(handle->curlerr));
unlink(tempfile);
goto cleanup;
}
/* remote_size isn't necessarily the full size of the file, just what the
* server reported as remaining to download. compare it to what curl reported
* as actually being transferred during curl_easy_perform() */
if((remote_size != -1 && bytes_dl != -1) && bytes_dl != remote_size) {
pm_errno = PM_ERR_RETRIEVE;
_alpm_log(PM_LOG_ERROR, _("%s appears to be truncated: %jd/%jd bytes\n"),
filename, (intmax_t)dl_thisfile, (intmax_t)ust.size);
ret = -1;
filename, (intmax_t)bytes_dl, (intmax_t)remote_size);
goto cleanup;
}
/* probably safer to close the file descriptors now before renaming the file,
* for example to make sure the buffers are flushed.
*/
fclose(localf);
localf = NULL;
fetchIO_close(dlf);
dlf = NULL;
/* set the times on the file to the same as that of the remote file */
if(ust.mtime) {
if(remote_time != -1) {
struct timeval tv[2];
memset(&tv, 0, sizeof(tv));
tv[0].tv_sec = ust.atime;
tv[1].tv_sec = ust.mtime;
tv[0].tv_sec = tv[1].tv_sec = remote_time;
utimes(tempfile, tv);
}
if(rename(tempfile, destfile)) {
_alpm_log(PM_LOG_ERROR, _("could not rename %s to %s (%s)\n"),
tempfile, destfile, strerror(errno));
ret = -1;
}
rename(tempfile, destfile);
ret = 0;
cleanup:
@ -318,19 +271,14 @@ cleanup:
/* if we still had a local file open, we got interrupted. set the mtimes on
* the file accordingly. */
fflush(localf);
if(ust.mtime) {
if(remote_time != -1) {
struct timeval tv[2];
memset(&tv, 0, sizeof(tv));
tv[0].tv_sec = ust.atime;
tv[1].tv_sec = ust.mtime;
tv[0].tv_sec = tv[1].tv_sec = remote_time;
futimes(fileno(localf), tv);
}
fclose(localf);
}
if(dlf != NULL) {
fetchIO_close(dlf);
}
fetchFreeURL(fileurl);
/* restore the old signal handlers */
sigaction(SIGINT, &sig_int[OLD], NULL);
@ -347,8 +295,8 @@ cleanup:
static int download(const char *url, const char *localpath,
int force) {
if(handle->fetchcb == NULL) {
#ifdef HAVE_LIBFETCH
return(download_internal(url, localpath, force));
#ifdef HAVE_LIBCURL
return(curl_download_internal(url, localpath, force));
#else
RET_ERR(PM_ERR_EXTERNAL_DOWNLOAD, -1);
#endif

2
lib/libalpm/dload.h
View File

@ -25,8 +25,6 @@
#include <time.h>
#define PM_DLBUF_LEN (1024 * 16)
int _alpm_download_single_file(const char *filename,
alpm_list_t *servers, const char *localpath,
int force);

19
lib/libalpm/error.c
View File

@ -20,21 +20,14 @@
#include "config.h"
/* TODO: needed for the libfetch stuff, unfortunately- we should kill it */
#include <stdio.h>
/* the following two are needed for FreeBSD's libfetch */
#include <limits.h> /* PATH_MAX */
#if defined(HAVE_SYS_PARAM_H)
#include <sys/param.h> /* MAXHOSTNAMELEN */
#endif
#ifdef HAVE_LIBFETCH
#include <fetch.h> /* fetchLastErrString */
#ifdef HAVE_LIBCURL
#include <curl/curl.h>
#endif
/* libalpm */
#include "util.h"
#include "alpm.h"
#include "handle.h"
const char SYMEXPORT *alpm_strerrorlast(void)
{
@ -147,9 +140,9 @@ const char SYMEXPORT *alpm_strerror(int err)
* requires the archive struct, so we can't. Just use a generic
* error string instead. */
return _("libarchive error");
case PM_ERR_LIBFETCH:
#ifdef HAVE_LIBFETCH
return fetchLastErrString;
case PM_ERR_LIBCURL:
#ifdef HAVE_LIBCURL
return(curl_easy_strerror(handle->curlerr));
#else
/* obviously shouldn't get here... */
return _("download library error");

6
lib/libalpm/handle.c
View File

@ -71,6 +71,11 @@ void _alpm_handle_free(pmhandle_t *handle)
closelog();
}
#ifdef HAVE_LIBCURL
/* release curl handle */
curl_easy_cleanup(handle->curl);
#endif
/* free memory */
_alpm_trans_free(handle->trans);
FREE(handle->root);
@ -85,6 +90,7 @@ void _alpm_handle_free(pmhandle_t *handle)
FREELIST(handle->ignorepkg);
FREELIST(handle->ignoregrp);
FREE(handle);
}
alpm_cb_log SYMEXPORT alpm_option_get_logcb()

10
lib/libalpm/handle.h
View File

@ -29,6 +29,10 @@
#include "alpm.h"
#include "trans.h"
#ifdef HAVE_LIBCURL
#include <curl/curl.h>
#endif
typedef struct _pmhandle_t {
/* internal usage */
pmdb_t *db_local; /* local db pointer */
@ -37,6 +41,12 @@ typedef struct _pmhandle_t {
FILE *lckstream; /* lock file stream pointer if one exists */
pmtrans_t *trans;
#ifdef HAVE_LIBCURL
/* libcurl handle */
CURL *curl; /* reusable curl_easy handle */
CURLcode curlerr; /* last error produced by curl */
#endif
/* callback functions */
alpm_cb_log logcb; /* Log callback function */
alpm_cb_download dlcb; /* Download callback function */