2 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
4 * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
33 #include <glib/gstdio.h>
34 #include <glib/gi18n.h>
35 #include <glib/gprintf.h>
38 #include <curl/curl.h>
40 #include "background.h"
43 #include "curl_download.h"
45 gchar *curl_download_user_agent;
48 * Even if writing to FILE* is supported by libcurl by default,
49 * it seems that it is non-portable (win32 DLL specific).
51 * So, we provide our own trivial CURLOPT_WRITEFUNCTION.
53 static size_t curl_write_func(void *ptr, size_t size, size_t nmemb, FILE *stream)
55 return fwrite(ptr, size, nmemb, stream);
58 static size_t curl_get_etag_func(void *ptr, size_t size, size_t nmemb, gchar **stream)
60 size_t len = size*nmemb;
61 char *str = g_strstr_len(ptr, len, "ETag:");
63 char *etag_str = str + strlen("ETag: ");
64 char *end_str = g_strstr_len(etag_str, len, "\n");
65 if (etag_str && end_str) {
67 *stream = g_strndup(etag_str, len);
73 static int curl_progress_func(void *clientp, double dltotal, double dlnow, double ultotal, double ulnow)
75 return a_background_testcancel(NULL);
78 static gchar *get_cookie_file(gboolean init)
80 static gchar *cookie_file = NULL;
81 static GMutex *mutex = NULL;
83 if (init) { /* to make sure it's thread safe */
84 mutex = g_mutex_new();
85 static gchar *cookie_fn = "cookies.txt";
86 const gchar *viking_dir = a_get_viking_dir();
87 cookie_file = g_build_filename(viking_dir, cookie_fn, NULL);
88 g_unlink(cookie_file);
92 g_assert(cookie_file != NULL);
95 if (g_file_test(cookie_file, G_FILE_TEST_EXISTS) == FALSE) { /* file not there */
96 gchar * name_tmp = NULL;
97 FILE * out_file = tmpfile();
98 if (out_file == NULL) {
99 // Something wrong with previous call (unsuported?)
100 name_tmp = g_strdup_printf("%s.tmp", cookie_file);
101 out_file = g_fopen(name_tmp, "w+b");
104 CURL *curl = curl_easy_init();
106 curl_easy_setopt ( curl, CURLOPT_VERBOSE, 1 );
107 curl_easy_setopt(curl, CURLOPT_URL, "http://maps.google.com/"); /* google.com sets "PREF" cookie */
108 curl_easy_setopt ( curl, CURLOPT_WRITEDATA, out_file );
109 curl_easy_setopt ( curl, CURLOPT_WRITEFUNCTION, curl_write_func);
110 curl_easy_setopt(curl, CURLOPT_COOKIEJAR, cookie_file);
111 res = curl_easy_perform(curl);
112 if (res != CURLE_OK) {
113 g_warning(_("%s() Curl perform failed: %s"), __PRETTY_FUNCTION__,
114 curl_easy_strerror(res));
115 g_unlink(cookie_file);
117 curl_easy_cleanup(curl);
120 if (name_tmp != NULL) {
126 g_mutex_unlock(mutex);
131 /* This should to be called from main() to make sure thread safe */
132 void curl_download_init()
134 curl_global_init(CURL_GLOBAL_ALL);
135 get_cookie_file(TRUE);
136 curl_download_user_agent = g_strdup_printf ("%s/%s %s", PACKAGE, VERSION, curl_version());
139 int curl_download_uri ( const char *uri, FILE *f, DownloadMapOptions *options, DownloadFileOptions *file_options, void *handle )
142 struct curl_slist *curl_send_headers = NULL;
143 CURLcode res = CURLE_FAILED_INIT;
144 const gchar *cookie_file;
146 g_debug("%s: uri=%s", __PRETTY_FUNCTION__, uri);
148 curl = handle ? handle : curl_easy_init ();
150 return DOWNLOAD_ERROR;
153 curl_easy_setopt ( curl, CURLOPT_VERBOSE, 1 );
154 curl_easy_setopt ( curl, CURLOPT_URL, uri );
155 curl_easy_setopt ( curl, CURLOPT_WRITEDATA, f );
156 curl_easy_setopt ( curl, CURLOPT_WRITEFUNCTION, curl_write_func);
157 curl_easy_setopt ( curl, CURLOPT_NOPROGRESS, 0 );
158 curl_easy_setopt ( curl, CURLOPT_PROGRESSDATA, NULL );
159 curl_easy_setopt ( curl, CURLOPT_PROGRESSFUNCTION, curl_progress_func);
160 if (options != NULL) {
161 if(options->referer != NULL)
162 curl_easy_setopt ( curl, CURLOPT_REFERER, options->referer);
163 if(options->follow_location != 0) {
164 curl_easy_setopt ( curl, CURLOPT_FOLLOWLOCATION, 1);
165 curl_easy_setopt ( curl, CURLOPT_MAXREDIRS, options->follow_location);
167 if (file_options != NULL) {
168 if(options->check_file_server_time && file_options->time_condition != 0) {
169 /* if file exists, check against server if file is recent enough */
170 curl_easy_setopt ( curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
171 curl_easy_setopt ( curl, CURLOPT_TIMEVALUE, file_options->time_condition);
173 if (options->use_etag) {
174 if (file_options->etag != NULL) {
175 /* add an header on the HTTP request */
177 g_snprintf(str, 50, "If-None-Match: %s", file_options->etag);
178 curl_send_headers = curl_slist_append(curl_send_headers, str);
179 curl_easy_setopt ( curl, CURLOPT_HTTPHEADER , curl_send_headers);
181 /* store the new etag from the server in an option value */
182 curl_easy_setopt ( curl, CURLOPT_WRITEHEADER, &(file_options->new_etag));
183 curl_easy_setopt ( curl, CURLOPT_HEADERFUNCTION, curl_get_etag_func);
187 curl_easy_setopt ( curl, CURLOPT_USERAGENT, curl_download_user_agent );
188 if ((cookie_file = get_cookie_file(FALSE)) != NULL)
189 curl_easy_setopt(curl, CURLOPT_COOKIEFILE, cookie_file);
190 res = curl_easy_perform ( curl );
194 curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response);
195 if (response == 304) { // 304 = Not Modified
196 res = DOWNLOAD_NO_NEWER_FILE;
197 } else if (response == 200 || // http: 200 = Ok
198 response == 226) { // ftp: 226 = sucess
200 /* verify if curl sends us any data - this is a workaround on using CURLOPT_TIMECONDITION
201 when the server has a (incorrect) time earlier than the time on the file we already have */
202 curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD, &size);
204 res = DOWNLOAD_ERROR;
206 res = DOWNLOAD_NO_ERROR;
208 g_warning("%s: http response: %ld for uri %s (time_condition = %ld)\n", __FUNCTION__, response, uri, file_options->time_condition);
209 res = DOWNLOAD_ERROR;
212 res = DOWNLOAD_ERROR;
215 curl_easy_cleanup ( curl );
216 if (curl_send_headers)
217 curl_slist_free_all(curl_send_headers);
221 int curl_download_get_url ( const char *hostname, const char *uri, FILE *f, DownloadMapOptions *options, gboolean ftp, DownloadFileOptions *file_options, void *handle )
226 /* Compose the full url */
227 full = g_strdup_printf ( "%s://%s%s", (ftp?"ftp":"http"), hostname, uri );
228 ret = curl_download_uri ( full, f, options, file_options, handle );
235 void * curl_download_handle_init ()
237 return curl_easy_init();
240 void curl_download_handle_cleanup ( void *handle )
242 curl_easy_cleanup(handle);