--- /dev/null
+/*
+ * Copyright (C) 2009 Andy Spencer <spenceal@rose-hulman.edu>
+ *
+ * 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 3 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 <stdio.h>
+#include <glib.h>
+#include <libsoup/soup.h>
+
+#include "gis-data.h"
+
+typedef struct {
+ gchar *uri;
+ gchar *local;
+ FILE *fp;
+ GisDataCacheDoneCallback user_done_cb;
+ GisDataCacheChunkCallback user_chunk_cb;
+ gpointer user_data;
+} cache_file_end_t;
+
+/*
+ * Open a file, creating parent directories if needed
+ */
+static FILE *fopen_p(const gchar *path, const gchar *mode)
+{
+ gchar *parent = g_path_get_dirname(path);
+ if (!g_file_test(parent, G_FILE_TEST_EXISTS))
+ g_mkdir_with_parents(parent, 0755);
+ g_free(parent);
+ return fopen(path, mode);
+}
+
+static void done_cb(SoupSession *session, SoupMessage *message, gpointer _info)
+{
+ cache_file_end_t *info = _info;
+ g_debug("data: done_cb");
+
+ if (message->status_code == 416)
+ /* Range unsatisfiable, file already complete */
+ info->user_done_cb(info->local, FALSE, info->user_data);
+ else if (SOUP_STATUS_IS_SUCCESSFUL(message->status_code))
+ info->user_done_cb(info->local, TRUE, info->user_data);
+ else
+ g_warning("data: done_cb - error copying file, status=%d\n"
+ "\tsrc=%s\n"
+ "\tdst=%s",
+ message->status_code, info->uri, info->local);
+ g_free(info->uri);
+ g_free(info->local);
+ fclose(info->fp);
+ g_free(info);
+ //g_object_unref(session); This is probably leaking
+}
+
+void chunk_cb(SoupMessage *message, SoupBuffer *chunk, gpointer _info)
+{
+ cache_file_end_t *info = _info;
+ if (!SOUP_STATUS_IS_SUCCESSFUL(message->status_code))
+ return;
+
+ if (!fwrite(chunk->data, chunk->length, 1, info->fp))
+ g_error("data: chunk_cb - Unable to write data");
+ goffset cur = ftell(info->fp);
+ //goffset total = soup_message_headers_get_range(message->response_headers);
+ goffset start=0, end=0, total=0;
+ soup_message_headers_get_content_range(message->response_headers,
+ &start, &end, &total);
+
+ if (info->user_chunk_cb)
+ info->user_chunk_cb(info->local, cur, total, info->user_data);
+}
+
+static SoupSession *do_cache(cache_file_end_t *info, gboolean truncate, gchar *reason)
+{
+ char *name = g_path_get_basename(info->uri);
+ g_debug("data: do_cache - Caching file %s: %s", name, reason);
+ g_free(name);
+
+ /* TODO: move this to callback so we don't end up with 0 byte files
+ * Then change back to check for valid file after download */
+ if (truncate) info->fp = fopen_p(info->local, "w");
+ else info->fp = fopen_p(info->local, "a");
+ long bytes = ftell(info->fp);
+
+ SoupSession *session = soup_session_async_new();
+ g_object_set(session, "user-agent", PACKAGE_STRING, NULL);
+ SoupMessage *message = soup_message_new("GET", info->uri);
+ if (message == NULL)
+ g_error("message is null, cannot parse uri");
+ g_signal_connect(message, "got-chunk", G_CALLBACK(chunk_cb), info);
+ soup_message_headers_set_range(message->request_headers, bytes, -1);
+ soup_session_queue_message(session, message, done_cb, info);
+ return session;
+}
+
+/*
+ * Cache a image from Ridge to the local disk
+ * \param path Path to the Ridge file, starting after /ridge/
+ * \return The local path to the cached image
+ */
+SoupSession *cache_file(char *base, char *path, GisDataCacheType update,
+ GisDataCacheChunkCallback user_chunk_cb,
+ GisDataCacheDoneCallback user_done_cb,
+ gpointer user_data)
+{
+ g_debug("GisData: cache_file - base=%s, path=%s", base, path);
+ if (base == NULL) {
+ g_warning("GisData: cache_file - base is null");
+ return NULL;
+ }
+ if (path == NULL) {
+ g_warning("GisData: cache_file - base is null");
+ return NULL;
+ }
+ cache_file_end_t *info = g_malloc0(sizeof(cache_file_end_t));
+ info->uri = g_strconcat(base, path, NULL);
+ info->local = g_build_filename(g_get_user_cache_dir(), PACKAGE, path, NULL);
+ info->fp = NULL;
+ info->user_chunk_cb = user_chunk_cb;
+ info->user_done_cb = user_done_cb;
+ info->user_data = user_data;
+
+ if (update == GIS_REFRESH)
+ return do_cache(info, TRUE, "cache forced");
+
+ if (update == GIS_UPDATE)
+ return do_cache(info, FALSE, "attempting updating");
+
+ if (update == GIS_ONCE && !g_file_test(info->local, G_FILE_TEST_EXISTS))
+ return do_cache(info, TRUE, "local does not exist");
+
+ /* No nead to cache, run the callback now and clean up */
+ user_done_cb(info->local, FALSE, user_data);
+ g_free(info->uri);
+ g_free(info->local);
+ g_free(info);
+ return NULL;
+}
projects / grits / blobdiff