2 * libwebsockets-test-client - libwebsockets test implementation
4 * Copyright (C) 2011 Andy Green <andy@warmcat.com>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation:
9 * version 2.1 of the License.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
29 #include "../lib/libwebsockets.h"
33 * This demo shows how to connect multiple websockets simultaneously to a
34 * websocket server (there is no restriction on their having to be the same
35 * server just it simplifies the demo).
37 * dumb-increment-protocol: we connect to the server and print the number
40 * lws-mirror-protocol: draws random circles, which are mirrored on to every
41 * client (see them being drawn in every browser
42 * session also using the test server)
47 PROTOCOL_DUMB_INCREMENT,
55 /* dumb_increment protocol */
58 callback_dumb_increment(struct libwebsocket *wsi,
59 enum libwebsocket_callback_reasons reason,
60 void *user, void *in, size_t len)
64 case LWS_CALLBACK_CLIENT_RECEIVE:
65 fprintf(stderr, "rx %d '%s'\n", len, in);
76 /* lws-mirror_protocol */
78 /* "how to draw a circle" */
85 static struct coord circle[] = {
212 callback_lws_mirror(struct libwebsocket *wsi,
213 enum libwebsocket_callback_reasons reason,
214 void *user, void *in, size_t len)
218 case LWS_CALLBACK_CLIENT_RECEIVE:
219 // fprintf(stderr, "rx %d '%s'\n", len, in);
230 /* list of supported protocols and callbacks */
232 static struct libwebsocket_protocols protocols[] = {
234 [PROTOCOL_DUMB_INCREMENT] = {
235 .name = "dumb-increment-protocol",
236 .callback = callback_dumb_increment,
238 [PROTOCOL_LWS_MIRROR] = {
239 .name = "lws-mirror-protocol",
240 .callback = callback_lws_mirror,
242 [DEMO_PROTOCOL_COUNT] = { /* end of list */
247 static struct option options[] = {
248 { "help", no_argument, NULL, 'h' },
249 { "port", required_argument, NULL, 'p' },
250 { "ssl", no_argument, NULL, 's' },
255 int main(int argc, char **argv)
260 struct libwebsocket_context *context;
261 const char * address = argv[1];
262 struct libwebsocket *wsi_dumb;
263 struct libwebsocket *wsi_mirror;
264 unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 1024 +
265 LWS_SEND_BUFFER_POST_PADDING];
275 fprintf(stderr, "libwebsockets test client\n"
276 "(C) Copyright 2010 Andy Green <andy@warmcat.com> "
277 "licensed under LGPL2.1\n");
285 n = getopt_long(argc, argv, "hsp:", options, NULL);
301 * create the websockets context. This tracks open connections and
302 * knows how to route any traffic and which protocol version to use,
303 * and if each connection is client or server side.
305 * For this client-only demo, we tell it to not listen on any port.
308 context = libwebsocket_create_context(CONTEXT_PORT_NO_LISTEN,
309 protocols, NULL, NULL, -1, -1);
310 if (context == NULL) {
311 fprintf(stderr, "Creating libwebsocket context failed\n");
316 /* create a client websocket using dumb increment protocol */
318 wsi_dumb = libwebsocket_client_connect(context, address, port, "/",
319 "http://host", "origin",
320 protocols[PROTOCOL_DUMB_INCREMENT].name);
322 if (wsi_dumb == NULL) {
323 fprintf(stderr, "libwebsocket dumb connect failed\n");
327 /* create a client websocket using mirror protocol */
329 wsi_mirror = libwebsocket_client_connect(context, address, port, "/",
330 "http://host", "origin",
331 protocols[PROTOCOL_LWS_MIRROR].name);
333 if (wsi_mirror == NULL) {
334 fprintf(stderr, "libwebsocket dumb connect failed\n");
338 fprintf(stderr, "Websocket connections opened\n");
341 * sit there servicing the websocket context to handle incoming
342 * packets, and drawing random circles on the mirror protocol websocket
350 if (i == sizeof circle / sizeof circle[0])
354 xofs = random() % 500;
355 yofs = random() % 250;
356 scale = random() % 24;
360 oldx = xofs + (circle[i].x / scale);
361 oldy = yofs + (circle[i].y / scale);
362 colour = random() & 0xffffff;
365 len = sprintf(&buf[LWS_SEND_BUFFER_PRE_PADDING],
366 "d #%06X %d %d %d %d", colour, oldx, oldy,
367 xofs + (circle[i].x / scale),
368 yofs + (circle[i].y / scale));
369 oldx = xofs + (circle[i].x / scale);
370 oldy = yofs + (circle[i].y / scale);
373 libwebsocket_write(wsi_mirror,
374 &buf[LWS_SEND_BUFFER_PRE_PADDING], len, LWS_WRITE_TEXT);
377 n = libwebsocket_service(context, 0);
380 libwebsocket_client_close(wsi_dumb);
381 libwebsocket_client_close(wsi_mirror);
383 libwebsocket_context_destroy(context);
388 fprintf(stderr, "Usage: libwebsockets-test-client "
389 "<server address> [--port=<p>] "