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 int curl_progress_func(void *clientp, double dltotal, double dlnow, double ultotal, double ulnow)
60 return a_background_testcancel(NULL);
63 static gchar *get_cookie_file(gboolean init)
65 static gchar *cookie_file = NULL;
66 static GMutex *mutex = NULL;
68 if (init) { /* to make sure it's thread safe */
69 mutex = g_mutex_new();
70 static gchar *cookie_fn = "cookies.txt";
71 const gchar *viking_dir = a_get_viking_dir();
72 cookie_file = g_build_filename(viking_dir, cookie_fn, NULL);
73 g_unlink(cookie_file);
77 g_assert(cookie_file != NULL);
80 if (g_file_test(cookie_file, G_FILE_TEST_EXISTS) == FALSE) { /* file not there */
81 gchar * name_tmp = NULL;
82 FILE * out_file = tmpfile();
83 if (out_file == NULL) {
84 // Something wrong with previous call (unsuported?)
85 name_tmp = g_strdup_printf("%s.tmp", cookie_file);
86 out_file = g_fopen(name_tmp, "w+b");
89 CURL *curl = curl_easy_init();
91 curl_easy_setopt ( curl, CURLOPT_VERBOSE, 1 );
92 curl_easy_setopt(curl, CURLOPT_URL, "http://maps.google.com/"); /* google.com sets "PREF" cookie */
93 curl_easy_setopt ( curl, CURLOPT_WRITEDATA, out_file );
94 curl_easy_setopt ( curl, CURLOPT_WRITEFUNCTION, curl_write_func);
95 curl_easy_setopt(curl, CURLOPT_COOKIEJAR, cookie_file);
96 res = curl_easy_perform(curl);
97 if (res != CURLE_OK) {
98 g_warning(_("%s() Curl perform failed: %s"), __PRETTY_FUNCTION__,
99 curl_easy_strerror(res));
100 g_unlink(cookie_file);
102 curl_easy_cleanup(curl);
105 if (name_tmp != NULL) {
111 g_mutex_unlock(mutex);
116 /* This should to be called from main() to make sure thread safe */
117 void curl_download_init()
119 curl_global_init(CURL_GLOBAL_ALL);
120 get_cookie_file(TRUE);
121 curl_download_user_agent = g_strdup_printf ("%s/%s %s", PACKAGE, VERSION, curl_version());
124 int curl_download_uri ( const char *uri, FILE *f, DownloadOptions *options, time_t time_condition, void *handle )
127 CURLcode res = CURLE_FAILED_INIT;
128 const gchar *cookie_file;
130 g_debug("%s: uri=%s", __PRETTY_FUNCTION__, uri);
132 curl = handle ? handle : curl_easy_init ();
134 return DOWNLOAD_ERROR;
137 curl_easy_setopt ( curl, CURLOPT_VERBOSE, 1 );
138 curl_easy_setopt ( curl, CURLOPT_URL, uri );
139 curl_easy_setopt ( curl, CURLOPT_WRITEDATA, f );
140 curl_easy_setopt ( curl, CURLOPT_WRITEFUNCTION, curl_write_func);
141 curl_easy_setopt ( curl, CURLOPT_NOPROGRESS, 0 );
142 curl_easy_setopt ( curl, CURLOPT_PROGRESSDATA, NULL );
143 curl_easy_setopt ( curl, CURLOPT_PROGRESSFUNCTION, curl_progress_func);
144 if (options != NULL) {
145 if(options->referer != NULL)
146 curl_easy_setopt ( curl, CURLOPT_REFERER, options->referer);
147 if(options->follow_location != 0) {
148 curl_easy_setopt ( curl, CURLOPT_FOLLOWLOCATION, 1);
149 curl_easy_setopt ( curl, CURLOPT_MAXREDIRS, options->follow_location);
151 if(options->check_file_server_time && time_condition != 0) {
152 /* if file exists, check against server if file is recent enough */
153 curl_easy_setopt ( curl, CURLOPT_TIMECONDITION, CURL_TIMECOND_IFMODSINCE);
154 curl_easy_setopt ( curl, CURLOPT_TIMEVALUE, time_condition);
157 curl_easy_setopt ( curl, CURLOPT_USERAGENT, curl_download_user_agent );
158 if ((cookie_file = get_cookie_file(FALSE)) != NULL)
159 curl_easy_setopt(curl, CURLOPT_COOKIEFILE, cookie_file);
160 res = curl_easy_perform ( curl );
163 curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &response);
164 if (response == 304) { // 304 = Not Modified
165 res = DOWNLOAD_NO_NEWER_FILE;
166 } else if (response == 200 || // http: 200 = Ok
167 response == 226) { // ftp: 226 = sucess
169 /* verify if curl sends us any data - this is a workaround on using CURLOPT_TIMECONDITION
170 when the server has a (incorrect) time earlier than the time on the file we already have */
171 curl_easy_getinfo(curl, CURLINFO_SIZE_DOWNLOAD, &size);
173 res = DOWNLOAD_ERROR;
175 res = DOWNLOAD_NO_ERROR;
177 g_warning("%s: http response: %ld for uri %s (time_condition = %ld)\n", __FUNCTION__, response, uri, time_condition);
178 res = DOWNLOAD_ERROR;
181 res = DOWNLOAD_ERROR;
184 curl_easy_cleanup ( curl );
188 int curl_download_get_url ( const char *hostname, const char *uri, FILE *f, DownloadOptions *options, gboolean ftp, time_t time_condition, void *handle )
193 /* Compose the full url */
194 full = g_strdup_printf ( "%s://%s%s", (ftp?"ftp":"http"), hostname, uri );
195 ret = curl_download_uri ( full, f, options, time_condition, handle );
202 void * curl_download_handle_init ()
204 return curl_easy_init();
207 void curl_download_handle_cleanup ( void *handle )
209 curl_easy_cleanup(handle);