RoadMapSocket roadmap_gpsd2_connect (const char *name) {
RoadMapSocket socket = roadmap_net_connect ("tcp", name, 0, 2947, NULL);
if (ROADMAP_NET_IS_VALID(socket)) {
/* Start watching what happens. */
static const char request[] = "w+\n";
if (roadmap_net_send
(socket, request, sizeof(request)-1, 1) != sizeof(request)-1) {
roadmap_log (ROADMAP_WARNING, "Lost gpsd server session");
roadmap_net_close (socket);
return ROADMAP_INVALID_SOCKET;
}
}
return socket;
}
static int roadmap_httpcopy (RoadMapDownloadCallbacks *callbacks,
const char *source,
const char *destination) {
RoadMapSocket fd;
RoadMapFile file;
int size;
int loaded;
int received;
char buffer[ROADMAP_HTTP_MAX_CHUNK];
fd = roadmap_net_connect("http_get", source, 80, NULL);
if (!ROADMAP_NET_IS_VALID(fd)) return 0;
if (roadmap_net_send(fd, "\r\n", 2, 0) == -1) return 0;
received = sizeof(buffer);
size = roadmap_http_decode_header
(fd, buffer, &received, callbacks->error);
if (size <= 0) {
roadmap_net_close (fd);
return 0; /* We did not get the size. */
}
if (! callbacks->size (size)) {
roadmap_net_close (fd);
return 0;
}
callbacks->progress (received);
roadmap_file_remove (NULL, destination);
file = roadmap_file_open(destination, "w");
if (!ROADMAP_FILE_IS_VALID(file)) {
roadmap_net_close (fd);
return 0;
}
if (received > 0) {
if (roadmap_file_write(file, buffer, received) != received) {
callbacks->error ("Error writing data");
goto cancel_download;
}
}
loaded = received;
while (loaded < size) {
received = roadmap_net_receive (fd, buffer, sizeof(buffer));
if (received <= 0) {
callbacks->error ("Receive error after %d data bytes", loaded);
goto cancel_download;
}
if (roadmap_file_write(file, buffer, received) != received) {
callbacks->error ("Error writing data");
goto cancel_download;
}
loaded += received;
callbacks->progress (loaded);
}
if (loaded != size) {
callbacks->error ("Receive error after %d data bytes", loaded);
goto cancel_download;
}
roadmap_net_close (fd);
roadmap_file_close(file);
return 1;
cancel_download:
roadmap_file_close(file);
roadmap_file_remove (NULL, destination);
roadmap_net_close (fd);
return 0;
}