How to compile:

pkg-config --libs soup-2.0

Some code examples (async):

1. Evolution:

	MAIL

	while (e_dlist_length(&p->fetch_active) < FETCH_MAX_CONNECTIONS
               && (rd = (struct _remote_data *)e_dlist_remhead(&p->fetch_queue))) {
                                                                                                                             
                ctx = soup_context_get(rd->uri);
                rd->msg = msg =  soup_message_new(ctx, SOUP_METHOD_GET);
                                                                                                                             
                if (ctx)
                        soup_context_unref(ctx);
                                                                                                                             
                soup_message_set_flags(msg, SOUP_MESSAGE_OVERWRITE_CHUNKS);
                soup_message_add_handler(msg, SOUP_HANDLER_BODY_CHUNK, fetch_data, rd);
                e_dlist_addtail(&p->fetch_active, (EDListNode *)rd);
                soup_message_queue(msg, fetch_done, rd);
        }

	WEATHER

	for (w = summary->weather->weathers; w; w = w->next) {
                SoupContext *context;
                char *uri;
                Weather *weather = w->data;
                                                                                                                             
                if (weather->message != NULL) {
                        continue;
                }
                                                                                                                             
                uri = g_strdup_printf ("http://weather.noaa.gov/cgi-bin/mgetmetar.pl?cccc=%s", weather->location);
                context = soup_context_get (uri);
                if (context == NULL) {
                        g_warning ("Invalid URL: %s", uri);
                        soup_context_unref (context);
                        g_free (uri);
                        continue;
                }
                                                                                                                             
                weather->message = soup_message_new (context, SOUP_METHOD_GET);
                soup_context_unref (context);
                soup_message_queue (weather->message, message_finished, weather);
                                                                                                                             
                g_free (uri);
        }

	static void
	message_finished (SoupMessage *msg,
                  	  gpointer userdata)
	{
        	Weather *w = (Weather *) userdata;
        	ESummary *summary;
        	char *html, *metar, *end;
        	char *search_str;
		....
		if (SOUP_MESSAGE_IS_ERROR (msg)) {
		...
		}
		html = g_strdup (msg->response.body);
        	w->message = NULL;
                                                                                                                             
        	/* Find the metar data */
        	search_str = g_strdup_printf ("\n%s", w->location);
		...
	}