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-rw-r--r--lib/libalpm/dload.c408
1 files changed, 408 insertions, 0 deletions
diff --git a/lib/libalpm/dload.c b/lib/libalpm/dload.c
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+/*
+ * download.c
+ *
+ * Copyright (c) 2002-2008 by Judd Vinet <jvinet@zeroflux.org>
+ *
+ * This program 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.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <download.h> /* libdownload */
+
+/* libalpm */
+#include "dload.h"
+#include "alpm_list.h"
+#include "alpm.h"
+#include "log.h"
+#include "util.h"
+#include "error.h"
+#include "handle.h"
+
+/* Return a 'struct url' for this server, for downloading 'filename'. */
+static struct url *url_for_file(const char *url, const char *filename)
+{
+ struct url *ret = NULL;
+ char *buf = NULL;
+ int len;
+
+ /* print url + filename into a buffer */
+ len = strlen(url) + strlen(filename) + 2;
+ CALLOC(buf, len, sizeof(char), RET_ERR(PM_ERR_MEMORY, NULL));
+ snprintf(buf, len, "%s/%s", url, filename);
+
+ ret = downloadParseURL(buf);
+ FREE(buf);
+ if(!ret) {
+ _alpm_log(PM_LOG_ERROR, _("url '%s' is invalid\n"), buf);
+ RET_ERR(PM_ERR_SERVER_BAD_URL, NULL);
+ }
+
+ /* if no URL scheme specified, assume HTTP */
+ if(strlen(ret->scheme) == 0) {
+ _alpm_log(PM_LOG_WARNING, _("url scheme not specified, assuming HTTP\n"));
+ strcpy(ret->scheme, SCHEME_HTTP);
+ }
+ /* add a user & password for anonymous FTP */
+ if(strcmp(ret->scheme,SCHEME_FTP) == 0 && strlen(ret->user) == 0) {
+ strcpy(ret->user, "anonymous");
+ strcpy(ret->pwd, "libalpm@guest");
+ }
+
+ return(ret);
+}
+
+/* TODO temporary private declaration */
+int _alpm_downloadfiles_forreal(alpm_list_t *servers, const char *localpath,
+ alpm_list_t *files, time_t mtime1, time_t *mtime2, int *dl_total,
+ unsigned long totalsize);
+
+
+/* TODO implement these as real functions */
+int _alpm_download_single_file(const char *filename,
+ alpm_list_t *servers, const char *localpath,
+ time_t mtimeold, time_t *mtimenew)
+{
+ alpm_list_t *files = NULL;
+ int ret;
+
+ /* make a temp one element list */
+ files = alpm_list_add(files, (char*)filename);
+
+ ret = _alpm_downloadfiles_forreal(servers, localpath,
+ files, mtimeold, mtimenew, NULL, 0);
+
+ /* free list (data was NOT duplicated) */
+ alpm_list_free(files);
+ return(ret);
+}
+
+int _alpm_download_files(alpm_list_t *files,
+ alpm_list_t *servers, const char *localpath)
+{
+ int ret;
+
+ ret = _alpm_downloadfiles_forreal(servers, localpath,
+ files, 0, NULL, NULL, 0);
+
+ return(ret);
+}
+
+
+/*
+ * This is the real downloadfiles, used directly by sync_synctree() to check
+ * modtimes on remote files.
+ * - if mtime1 is non-NULL, then only download files if they are different
+ * than mtime1.
+ * - if *mtime2 is non-NULL, it will be filled with the mtime of the remote
+ * file.
+ * - if *dl_total is non-NULL, then it will be used as the starting
+ * download amount when TotalDownload is set. It will also be
+ * set to the final download amount for the calling function to use.
+ * - totalsize is the total download size for use when TotalDownload
+ * is set. Use 0 if the total download size is not known.
+ *
+ * RETURN: 0 for successful download
+ * 1 if the mtimes are identical
+ * -1 on error
+ */
+int _alpm_downloadfiles_forreal(alpm_list_t *servers, const char *localpath,
+ alpm_list_t *files, time_t mtime1, time_t *mtime2, int *dl_total,
+ unsigned long totalsize)
+{
+ int dl_thisfile = 0;
+ alpm_list_t *lp;
+ int done = 0;
+ alpm_list_t *complete = NULL;
+ alpm_list_t *i;
+
+ ALPM_LOG_FUNC;
+
+ if(files == NULL) {
+ return(0);
+ }
+
+ for(i = servers; i && !done; i = i->next) {
+ const char *server = i->data;
+
+ /* get each file in the list */
+ for(lp = files; lp; lp = lp->next) {
+ struct url *fileurl = NULL;
+ char realfile[PATH_MAX];
+ char output[PATH_MAX];
+ char *fn = (char *)lp->data;
+ char *pkgname;
+
+ fileurl = url_for_file(server, fn);
+ if(!fileurl) {
+ return(-1);
+ }
+
+ /* pass the raw filename for passing to the callback function */
+ STRDUP(pkgname, fn, (void)0);
+ _alpm_log(PM_LOG_DEBUG, "using '%s' for download progress\n", pkgname);
+
+ snprintf(realfile, PATH_MAX, "%s%s", localpath, fn);
+ snprintf(output, PATH_MAX, "%s%s.part", localpath, fn);
+
+ if(alpm_list_find_str(complete, fn)) {
+ continue;
+ }
+
+ if(!handle->xfercommand
+ || !strcmp(fileurl->scheme, "file")) {
+ FILE *dlf, *localf = NULL;
+ struct url_stat ust;
+ struct stat st;
+ int chk_resume = 0;
+
+ if(stat(output, &st) == 0 && st.st_size > 0) {
+ _alpm_log(PM_LOG_DEBUG, "existing file found, using it\n");
+ fileurl->offset = (off_t)st.st_size;
+ dl_thisfile = st.st_size;
+ if (dl_total != NULL) {
+ *dl_total += st.st_size;
+ }
+ localf = fopen(output, "a");
+ chk_resume = 1;
+ } else {
+ fileurl->offset = (off_t)0;
+ dl_thisfile = 0;
+ }
+
+ /* libdownload does not reset the error code, reset it in
+ * the case of previous errors */
+ downloadLastErrCode = 0;
+
+ /* 10s timeout - TODO make a config option */
+ downloadTimeout = 10000;
+
+ dlf = downloadXGet(fileurl, &ust, (handle->nopassiveftp ? "" : "p"));
+
+ if(downloadLastErrCode != 0 || dlf == NULL) {
+ const char *host = _("disk");
+ if(strcmp(SCHEME_FILE, fileurl->scheme) != 0) {
+ host = fileurl->host;
+ }
+ _alpm_log(PM_LOG_ERROR, _("failed retrieving file '%s' from %s : %s\n"),
+ fn, host, downloadLastErrString);
+ if(localf != NULL) {
+ fclose(localf);
+ }
+ /* try the next server */
+ downloadFreeURL(fileurl);
+ continue;
+ } else {
+ _alpm_log(PM_LOG_DEBUG, "connected to %s successfully\n", fileurl->host);
+ }
+
+ if(ust.mtime && mtime1 && ust.mtime == mtime1) {
+ _alpm_log(PM_LOG_DEBUG, "mtimes are identical, skipping %s\n", fn);
+ complete = alpm_list_add(complete, fn);
+ if(localf != NULL) {
+ fclose(localf);
+ }
+ if(dlf != NULL) {
+ fclose(dlf);
+ }
+ downloadFreeURL(fileurl);
+ return(1);
+ }
+
+ if(ust.mtime && mtime2) {
+ *mtime2 = ust.mtime;
+ }
+
+ if(chk_resume && fileurl->offset == 0) {
+ _alpm_log(PM_LOG_WARNING, _("cannot resume download, starting over\n"));
+ if(localf != NULL) {
+ fclose(localf);
+ localf = NULL;
+ }
+ }
+
+ if(localf == NULL) {
+ _alpm_rmrf(output);
+ fileurl->offset = (off_t)0;
+ dl_thisfile = 0;
+ localf = fopen(output, "w");
+ if(localf == NULL) { /* still null? */
+ _alpm_log(PM_LOG_ERROR, _("cannot write to file '%s'\n"), output);
+ if(dlf != NULL) {
+ fclose(dlf);
+ }
+ downloadFreeURL(fileurl);
+ return(-1);
+ }
+ }
+
+ /* Progress 0 - initialize */
+ if(handle->dlcb) {
+ handle->dlcb(pkgname, 0, ust.size, dl_total ? *dl_total : 0,
+ totalsize);
+ }
+
+ int nread = 0;
+ char buffer[PM_DLBUF_LEN];
+ while((nread = fread(buffer, 1, PM_DLBUF_LEN, dlf)) > 0) {
+ if(ferror(dlf)) {
+ _alpm_log(PM_LOG_ERROR, _("error downloading '%s': %s\n"),
+ fn, downloadLastErrString);
+ fclose(localf);
+ fclose(dlf);
+ downloadFreeURL(fileurl);
+ return(-1);
+ }
+
+ int nwritten = 0;
+ while(nwritten < nread) {
+ nwritten += fwrite(buffer, 1, (nread - nwritten), localf);
+ if(ferror(localf)) {
+ _alpm_log(PM_LOG_ERROR, _("error writing to file '%s': %s\n"),
+ realfile, strerror(errno));
+ fclose(localf);
+ fclose(dlf);
+ downloadFreeURL(fileurl);
+ return(-1);
+ }
+ }
+
+ if(nwritten != nread) {
+
+ }
+ dl_thisfile += nread;
+ if (dl_total != NULL) {
+ *dl_total += nread;
+ }
+
+ if(handle->dlcb) {
+ handle->dlcb(pkgname, dl_thisfile, ust.size,
+ dl_total ? *dl_total : 0, totalsize);
+ }
+ }
+
+ downloadFreeURL(fileurl);
+ fclose(localf);
+ fclose(dlf);
+ rename(output, realfile);
+ complete = alpm_list_add(complete, fn);
+ } else {
+ int ret;
+ int usepart = 0;
+ char *ptr1, *ptr2;
+ char origCmd[PATH_MAX];
+ char parsedCmd[PATH_MAX] = "";
+ char url[PATH_MAX];
+ char cwd[PATH_MAX];
+
+ /* build the full download url */
+ snprintf(url, PATH_MAX, "%s://%s%s", fileurl->scheme,
+ fileurl->host, fileurl->doc);
+ /* we don't need this anymore */
+ downloadFreeURL(fileurl);
+
+ /* replace all occurrences of %o with fn.part */
+ strncpy(origCmd, handle->xfercommand, sizeof(origCmd));
+ ptr1 = origCmd;
+ while((ptr2 = strstr(ptr1, "%o"))) {
+ usepart = 1;
+ ptr2[0] = '\0';
+ strcat(parsedCmd, ptr1);
+ strcat(parsedCmd, output);
+ ptr1 = ptr2 + 2;
+ }
+ strcat(parsedCmd, ptr1);
+ /* replace all occurrences of %u with the download URL */
+ strncpy(origCmd, parsedCmd, sizeof(origCmd));
+ parsedCmd[0] = '\0';
+ ptr1 = origCmd;
+ while((ptr2 = strstr(ptr1, "%u"))) {
+ ptr2[0] = '\0';
+ strcat(parsedCmd, ptr1);
+ strcat(parsedCmd, url);
+ ptr1 = ptr2 + 2;
+ }
+ strcat(parsedCmd, ptr1);
+ /* cwd to the download directory */
+ getcwd(cwd, PATH_MAX);
+ if(chdir(localpath)) {
+ _alpm_log(PM_LOG_WARNING, _("could not chdir to %s\n"), localpath);
+ return(PM_ERR_CONNECT_FAILED);
+ }
+ /* execute the parsed command via /bin/sh -c */
+ _alpm_log(PM_LOG_DEBUG, "running command: %s\n", parsedCmd);
+ ret = system(parsedCmd);
+ if(ret == -1) {
+ _alpm_log(PM_LOG_WARNING, _("running XferCommand: fork failed!\n"));
+ return(PM_ERR_FORK_FAILED);
+ } else if(ret != 0) {
+ /* download failed */
+ _alpm_log(PM_LOG_DEBUG, "XferCommand command returned non-zero status code (%d)\n", ret);
+ } else {
+ /* download was successful */
+ complete = alpm_list_add(complete, fn);
+ if(usepart) {
+ rename(output, realfile);
+ }
+ }
+ chdir(cwd);
+ }
+ FREE(pkgname);
+ }
+
+ if(alpm_list_count(complete) == alpm_list_count(files)) {
+ done = 1;
+ }
+ }
+ alpm_list_free(complete);
+
+ return(done ? 0 : -1);
+}
+
+/** Fetch a remote pkg.
+ * @param url URL of the package to download
+ * @return the downloaded filepath on success, NULL on error
+ * @addtogroup alpm_misc
+ */
+char SYMEXPORT *alpm_fetch_pkgurl(const char *url)
+{
+ /* TODO this method will not work at all right now */
+ char *filename, *filepath;
+ const char *cachedir;
+
+ ALPM_LOG_FUNC;
+
+ filename = NULL;
+
+ /* find a valid cache dir to download to */
+ cachedir = _alpm_filecache_setup();
+
+ /* download the file */
+ if(_alpm_download_single_file(NULL, NULL, cachedir, 0, NULL)) {
+ _alpm_log(PM_LOG_WARNING, _("failed to download %s\n"), url);
+ return(NULL);
+ }
+ _alpm_log(PM_LOG_DEBUG, "successfully downloaded %s\n", url);
+
+ /* we should be able to find the file the second time around */
+ filepath = _alpm_filecache_find(filename);
+ return(filepath);
+}
+
+/* vim: set ts=2 sw=2 noet: */
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