1 /* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
3 * viking -- GPS Data and Topo Analyzer, Explorer, and Manager
5 * Copyright (C) 2003-2005, Evan Battaglia <gtoevan@gmx.net>
6 * Copyright (C) 2007, Guilhem Bonnefille <guilhem.bonnefille@gmail.com>
7 * Copyright (C) 2013, Rob Norris <rw_norris@hotmail.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
33 #ifdef HAVE_SYS_TYPES_H
34 #include <sys/types.h>
40 #include <glib/gstdio.h>
41 #include <glib/gi18n.h>
46 #include "compression.h"
50 #include "curl_download.h"
51 #include "preferences.h"
53 #include "vik_compat.h"
55 static gboolean check_file_first_line(FILE* f, gchar *patterns[])
63 memset(buf, 0, sizeof(buf));
64 if ( !fgetpos(f, &pos) )
67 nr = fread(buf, 1, sizeof(buf) - 1, f);
68 if ( !fgetpos(f, &pos) )
70 for (bp = buf; (bp < (buf + sizeof(buf) - 1)) && (nr > (bp - buf)); bp++) {
74 if ((bp >= (buf + sizeof(buf) -1)) || ((bp - buf) >= nr))
76 for (s = patterns; *s; s++) {
77 if (strncasecmp(*s, bp, strlen(*s)) == 0)
83 gboolean a_check_html_file(FILE* f)
85 gchar * html_str[] = {
93 return check_file_first_line(f, html_str);
96 gboolean a_check_map_file(FILE* f)
98 /* FIXME no more true since a_check_kml_file */
99 return !a_check_html_file(f);
102 gboolean a_check_kml_file(FILE* f)
104 gchar * kml_str[] = {
109 return check_file_first_line(f, kml_str);
112 static GList *file_list = NULL;
113 static GMutex *file_list_mutex = NULL;
115 /* spin button scales */
116 static VikLayerParamScale params_scales[] = {
117 {1, 365, 1, 0}, /* download_tile_age */
120 static VikLayerParamData convert_to_display ( VikLayerParamData value )
122 // From seconds into days
123 return VIK_LPD_UINT ( value.u / 86400 );
126 static VikLayerParamData convert_to_internal ( VikLayerParamData value )
128 // From days into seconds
129 return VIK_LPD_UINT ( 86400 * value.u );
132 static VikLayerParam prefs[] = {
133 { VIK_LAYER_NUM_TYPES, VIKING_PREFERENCES_NAMESPACE "download_tile_age", VIK_LAYER_PARAM_UINT, VIK_LAYER_GROUP_NONE, N_("Tile age (days):"), VIK_LAYER_WIDGET_SPINBUTTON, ¶ms_scales[0], NULL, NULL, NULL, convert_to_display, convert_to_internal },
136 void a_download_init (void)
138 VikLayerParamData tmp;
139 tmp.u = VIK_CONFIG_DEFAULT_TILE_AGE / 86400; // Now in days
140 a_preferences_register(prefs, tmp, VIKING_PREFERENCES_GROUP_KEY);
141 file_list_mutex = vik_mutex_new();
144 void a_download_uninit (void)
146 vik_mutex_free(file_list_mutex);
149 static gboolean lock_file(const char *fn)
151 gboolean locked = FALSE;
152 g_mutex_lock(file_list_mutex);
153 if (g_list_find_custom(file_list, fn, (GCompareFunc)g_strcmp0) == NULL)
155 // The filename is not yet locked
156 file_list = g_list_append(file_list, (gpointer)fn),
159 g_mutex_unlock(file_list_mutex);
163 static void unlock_file(const char *fn)
165 g_mutex_lock(file_list_mutex);
166 file_list = g_list_remove(file_list, (gconstpointer)fn);
167 g_mutex_unlock(file_list_mutex);
171 * Unzip a file - replacing the file with the unzipped contents of the self
173 static void uncompress_zip ( gchar *name )
175 GError *error = NULL;
178 if ((mf = g_mapped_file_new ( name, FALSE, &error )) == NULL) {
179 g_critical(_("Couldn't map file %s: %s"), name, error->message);
183 gchar *file_contents = g_mapped_file_get_contents ( mf );
185 void *unzip_mem = NULL;
188 if ((unzip_mem = unzip_file (file_contents, &ucsize)) == NULL) {
189 g_mapped_file_unref ( mf );
193 // This overwrites any previous file contents
194 if ( ! g_file_set_contents ( name, unzip_mem, ucsize, &error ) ) {
195 g_critical ( "Couldn't write file '%s', because of %s", name, error->message );
196 g_error_free ( error );
201 * a_try_decompress_file:
202 * @name: The potentially compressed filename
204 * Perform magic to decide how which type of decompression to attempt
206 void a_try_decompress_file (gchar *name)
210 // Or magic_version() if available - probably need libmagic 5.18 or so
211 // (can't determine exactly which version the versioning became available)
212 g_debug ("%s: magic version: %d", __FUNCTION__, MAGIC_VERSION );
214 magic_t myt = magic_open ( MAGIC_CONTINUE|MAGIC_ERROR|MAGIC_MIME );
215 gboolean zip = FALSE;
216 gboolean bzip2 = FALSE;
219 // We have to 'package' the magic database ourselves :(
220 // --> %PROGRAM FILES%\Viking\magic.mgc
221 int ml = magic_load ( myt, ".\\magic.mgc" );
223 // Use system default
224 int ml = magic_load ( myt, NULL );
227 const char* magic = magic_file (myt, name);
228 g_debug ("%s: magic output: %s", __FUNCTION__, magic );
230 if ( g_strcmp0 (magic, "application/zip; charset=binary") == 0 )
233 if ( g_strcmp0 (magic, "application/x-bzip2; charset=binary") == 0 )
237 g_critical ("%s: magic load database failure", __FUNCTION__ );
243 if ( !(zip || bzip2) )
247 uncompress_zip ( name );
250 gchar* bz2_name = uncompress_bzip2 ( name );
252 if ( g_remove ( name ) )
253 g_critical ("%s: remove file failed [%s]", __FUNCTION__, name );
254 if ( g_rename (bz2_name, name) )
255 g_critical ("%s: file rename failed [%s] to [%s]", __FUNCTION__, bz2_name, name );
263 static DownloadResult_t download( const char *hostname, const char *uri, const char *fn, DownloadMapOptions *options, gboolean ftp, void *handle)
268 gboolean failure = FALSE;
269 DownloadFileOptions file_options = {0, NULL, NULL};
272 if ( g_file_test ( fn, G_FILE_TEST_EXISTS ) == TRUE )
274 if (options == NULL || (!options->check_file_server_time &&
275 !options->use_etag)) {
276 /* Nothing to do as file already exists and we don't want to check server */
277 return DOWNLOAD_NOT_REQUIRED;
280 time_t tile_age = a_preferences_get(VIKING_PREFERENCES_NAMESPACE "download_tile_age")->u;
281 /* Get the modified time of this file */
283 (void)g_stat ( fn, &buf );
284 time_t file_time = buf.st_mtime;
285 if ( (time(NULL) - file_time) < tile_age ) {
286 /* File cache is too recent, so return */
287 return DOWNLOAD_NOT_REQUIRED;
290 if (options->check_file_server_time) {
291 file_options.time_condition = file_time;
293 if (options->use_etag) {
294 gchar *etag_filename = g_strdup_printf("%s.etag", fn);
295 gsize etag_length = 0;
296 g_file_get_contents (etag_filename, &(file_options.etag), &etag_length, NULL);
297 g_free (etag_filename);
298 etag_filename = NULL;
300 /* check if etag is short enough */
301 if (etag_length > 100) {
302 g_free(file_options.etag);
303 file_options.etag = NULL;
306 /* TODO: should check that etag is a valid string */
310 gchar *dir = g_path_get_dirname ( fn );
311 g_mkdir_with_parents ( dir , 0777 );
315 tmpfilename = g_strdup_printf("%s.tmp", fn);
316 if (!lock_file ( tmpfilename ) )
318 g_debug("%s: Couldn't take lock on temporary file \"%s\"\n", __FUNCTION__, tmpfilename);
319 g_free ( tmpfilename );
320 if (options->use_etag)
321 g_free ( file_options.etag );
322 return DOWNLOAD_FILE_WRITE_ERROR;
324 f = g_fopen ( tmpfilename, "w+b" ); /* truncate file and open it */
326 g_warning("Couldn't open temporary file \"%s\": %s", tmpfilename, g_strerror(errno));
327 g_free ( tmpfilename );
328 if (options->use_etag)
329 g_free ( file_options.etag );
330 return DOWNLOAD_FILE_WRITE_ERROR;
333 /* Call the backend function */
334 ret = curl_download_get_url ( hostname, uri, f, options, ftp, &file_options, handle );
336 DownloadResult_t result = DOWNLOAD_SUCCESS;
338 if (ret != CURL_DOWNLOAD_NO_ERROR && ret != CURL_DOWNLOAD_NO_NEWER_FILE) {
339 g_debug("%s: download failed: curl_download_get_url=%d", __FUNCTION__, ret);
341 result = DOWNLOAD_HTTP_ERROR;
344 if (!failure && options != NULL && options->check_file != NULL && ! options->check_file(f)) {
345 g_debug("%s: file content checking failed", __FUNCTION__);
347 result = DOWNLOAD_CONTENT_ERROR;
355 g_warning(_("Download error: %s"), fn);
356 g_remove ( tmpfilename );
357 unlock_file ( tmpfilename );
358 g_free ( tmpfilename );
359 if (options->use_etag) {
360 g_free ( file_options.etag );
361 g_free ( file_options.new_etag );
366 if ( options->convert_file )
367 options->convert_file ( tmpfilename );
369 if (options->use_etag) {
370 if (file_options.new_etag) {
371 /* server returned an etag value */
372 gchar *etag_filename = g_strdup_printf("%s.etag", fn);
373 g_file_set_contents (etag_filename, file_options.new_etag, -1, NULL);
374 g_free (etag_filename);
375 etag_filename = NULL;
379 if (ret == CURL_DOWNLOAD_NO_NEWER_FILE) {
380 (void)g_remove ( tmpfilename );
381 #if GLIB_CHECK_VERSION(2,18,0)
382 g_utime ( fn, NULL ); /* update mtime of local copy */
384 utimes ( fn, NULL ); /* update mtime of local copy */
387 /* move completely-downloaded file to permanent location */
388 if ( g_rename ( tmpfilename, fn ) )
389 g_warning ("%s: file rename failed [%s] to [%s]", __FUNCTION__, tmpfilename, fn );
391 unlock_file ( tmpfilename );
392 g_free ( tmpfilename );
394 if (options->use_etag) {
395 g_free ( file_options.etag );
396 g_free ( file_options.new_etag );
398 return DOWNLOAD_SUCCESS;
402 * uri: like "/uri.html?whatever"
403 * only reason for the "wrapper" is so we can do redirects.
405 DownloadResult_t a_http_download_get_url ( const char *hostname, const char *uri, const char *fn, DownloadMapOptions *opt, void *handle )
407 return download ( hostname, uri, fn, opt, FALSE, handle );
410 DownloadResult_t a_ftp_download_get_url ( const char *hostname, const char *uri, const char *fn, DownloadMapOptions *opt, void *handle )
412 return download ( hostname, uri, fn, opt, TRUE, handle );
415 void * a_download_handle_init ()
417 return curl_download_handle_init ();
420 void a_download_handle_cleanup ( void *handle )
422 curl_download_handle_cleanup ( handle );
426 * a_download_url_to_tmp_file:
427 * @uri: The URI (Uniform Resource Identifier)
428 * @options: Download options (maybe NULL)
430 * returns name of the temporary file created - NULL if unsuccessful
431 * this string needs to be freed once used
432 * the file needs to be removed once used
434 gchar *a_download_uri_to_tmp_file ( const gchar *uri, DownloadMapOptions *options )
440 if ( (tmp_fd = g_file_open_tmp ("viking-download.XXXXXX", &tmpname, NULL)) == -1 ) {
441 g_critical (_("couldn't open temp file"));
445 tmp_file = fdopen(tmp_fd, "r+");
449 if ( curl_download_uri ( uri, tmp_file, options, NULL, NULL ) ) {
452 (void)g_remove ( tmpname );