Pileus Git - grits/blob - src/data/gis-http.c

   1 /*
   2  * Copyright (C) 2009-2010 Andy Spencer <andy753421@gmail.com>
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <config.h>
  19 #include <glib.h>
  20 #include <glib/gstdio.h>
  21 #include <libsoup/soup.h>
  22
  23 #include "gis-http.h"
  24
  25 GisHttp *gis_http_new(const gchar *prefix)
  26 {
  27         g_debug("GisHttp: new - %s", prefix);
  28         GisHttp *http = g_new0(GisHttp, 1);
  29         http->soup = soup_session_sync_new();
  30         http->prefix = g_strdup(prefix);
  31         g_object_set(http->soup, "user-agent", PACKAGE_STRING, NULL);
  32         return http;
  33 }
  34
  35 void gis_http_free(GisHttp *http)
  36 {
  37         g_debug("GisHttp: free - %s", http->prefix);
  38         soup_session_abort(http->soup);
  39         g_object_unref(http->soup);
  40         g_free(http->prefix);
  41         g_free(http);
  42 }
  43
  44 /* For passing data to the chunck callback */
  45 struct _cache_info {
  46         FILE  *fp;
  47         gchar *path;
  48         GisChunkCallback callback;
  49         gpointer user_data;
  50 };
  51
  52 /**
  53  * Append data to the file and call the users callback if they supplied one.
  54  */
  55 static void _chunk_cb(SoupMessage *message, SoupBuffer *chunk, gpointer _info)
  56 {
  57         struct _cache_info *info = _info;
  58
  59         if (!SOUP_STATUS_IS_SUCCESSFUL(message->status_code)) {
  60                 g_warning("GisHttp: _chunk_cb - soup failed with %d",
  61                                 message->status_code);
  62                 return;
  63         }
  64
  65         if (!fwrite(chunk->data, chunk->length, 1, info->fp))
  66                 g_error("GisHttp: _chunk_cb - Unable to write data");
  67
  68         if (info->callback) {
  69                 goffset cur = ftell(info->fp);
  70                 goffset st=0, end=0, total=0;
  71                 soup_message_headers_get_content_range(message->response_headers,
  72                                 &st, &end, &total);
  73                 info->callback(info->path, cur, total, info->user_data);
  74         }
  75 }
  76
  77 /* TODO: use .part extentions and continue even when using GIS_ONCE */
  78 gchar *gis_http_fetch(GisHttp *http, const gchar *uri, const char *local,
  79                 GisCacheType mode, GisChunkCallback callback, gpointer user_data)
  80 {
  81         g_debug("GisHttp: fetch - %.20s... >> %s/%s  mode=%d",
  82                         uri, http->prefix, local, mode);
  83
  84         gchar *path = g_build_filename(g_get_user_cache_dir(), PACKAGE,
  85                         http->prefix, local, NULL);
  86
  87         /* Unlink the file if we're refreshing it */
  88         if (mode == GIS_REFRESH)
  89                 g_remove(path);
  90
  91         /* Do the cache if necessasairy */
  92         if (!(mode == GIS_ONCE && g_file_test(path, G_FILE_TEST_EXISTS)) &&
  93                         mode != GIS_LOCAL) {
  94                 g_debug("GisHttp: do_cache - Caching file %s", local);
  95
  96                 /* Open the file for writting */
  97                 FILE *fp = fopen_p(path, "a");
  98
  99                 /* Make temp data */
 100                 struct _cache_info info = {
 101                         .fp        = fp,
 102                         .path      = path,
 103                         .callback  = callback,
 104                         .user_data = user_data,
 105                 };
 106
 107                 /* Download the file */
 108                 SoupMessage *message = soup_message_new("GET", uri);
 109                 if (message == NULL)
 110                         g_error("message is null, cannot parse uri");
 111                 g_signal_connect(message, "got-chunk", G_CALLBACK(_chunk_cb), &info);
 112                 soup_message_headers_set_range(message->request_headers, ftell(fp), -1);
 113                 soup_session_send_message(http->soup, message);
 114
 115                 /* Finished */
 116                 if (message->status_code == 416) {
 117                         /* Range unsatisfiable, file already complete */
 118                 } else if (!SOUP_STATUS_IS_SUCCESSFUL(message->status_code))
 119                         g_warning("GisHttp: done_cb - error copying file, status=%d\n"
 120                                         "\tsrc=%s\n"
 121                                         "\tdst=%s",
 122                                         message->status_code, uri, path);
 123         }
 124
 125         /* TODO: free everything.. */
 126         return path;
 127 }