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,
28 #include "../lib/libwebsockets.h"
30 static unsigned int opts;
31 static int was_closed;
32 static int deny_deflate;
34 static struct libwebsocket *wsi_mirror;
37 * This demo shows how to connect multiple websockets simultaneously to a
38 * websocket server (there is no restriction on their having to be the same
39 * server just it simplifies the demo).
41 * dumb-increment-protocol: we connect to the server and print the number
44 * lws-mirror-protocol: draws random circles, which are mirrored on to every
45 * client (see them being drawn in every browser
46 * session also using the test server)
51 PROTOCOL_DUMB_INCREMENT,
59 /* dumb_increment protocol */
62 callback_dumb_increment(struct libwebsocket_context *this,
63 struct libwebsocket *wsi,
64 enum libwebsocket_callback_reasons reason,
65 void *user, void *in, size_t len)
69 case LWS_CALLBACK_CLOSED:
70 fprintf(stderr, "LWS_CALLBACK_CLOSED\n");
74 case LWS_CALLBACK_CLIENT_RECEIVE:
75 ((char *)in)[len] = '\0';
76 fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in);
79 /* because we are protocols[0] ... */
81 case LWS_CALLBACK_CLIENT_CONFIRM_EXTENSION_SUPPORTED:
82 if ((strcmp(in, "deflate-stream") == 0) && deny_deflate) {
83 fprintf(stderr, "denied deflate-stream extension\n");
86 if ((strcmp(in, "x-google-mux") == 0) && deny_mux) {
87 fprintf(stderr, "denied x-google-mux extension\n");
101 /* lws-mirror_protocol */
105 callback_lws_mirror(struct libwebsocket_context *this,
106 struct libwebsocket *wsi,
107 enum libwebsocket_callback_reasons reason,
108 void *user, void *in, size_t len)
110 unsigned char buf[LWS_SEND_BUFFER_PRE_PADDING + 4096 +
111 LWS_SEND_BUFFER_POST_PADDING];
116 case LWS_CALLBACK_CLOSED:
117 fprintf(stderr, "mirror: LWS_CALLBACK_CLOSED\n");
121 case LWS_CALLBACK_CLIENT_ESTABLISHED:
124 * start the ball rolling,
125 * LWS_CALLBACK_CLIENT_WRITEABLE will come next service
128 libwebsocket_callback_on_writable(this, wsi);
131 case LWS_CALLBACK_CLIENT_RECEIVE:
132 /* fprintf(stderr, "rx %d '%s'\n", (int)len, (char *)in); */
135 case LWS_CALLBACK_CLIENT_WRITEABLE:
137 l = sprintf((char *)&buf[LWS_SEND_BUFFER_PRE_PADDING],
139 (int)random() & 0xffffff,
144 libwebsocket_write(wsi,
145 &buf[LWS_SEND_BUFFER_PRE_PADDING], l, opts | LWS_WRITE_TEXT);
147 /* get notified as soon as we can write again */
149 libwebsocket_callback_on_writable(this, wsi);
152 * without at least this delay, we choke the browser
153 * and the connection stalls, despite we now take care about
168 /* list of supported protocols and callbacks */
170 static struct libwebsocket_protocols protocols[] = {
172 "dumb-increment-protocol",
173 callback_dumb_increment,
177 "lws-mirror-protocol",
188 static struct option options[] = {
189 { "help", no_argument, NULL, 'h' },
190 { "port", required_argument, NULL, 'p' },
191 { "ssl", no_argument, NULL, 's' },
192 { "killmask", no_argument, NULL, 'k' },
193 { "version", required_argument, NULL, 'v' },
194 { "undeflated", no_argument, NULL, 'u' },
195 { "nomux", no_argument, NULL, 'n' },
200 int main(int argc, char **argv)
205 struct libwebsocket_context *context;
207 struct libwebsocket *wsi_dumb;
208 int ietf_version = -1; /* latest */
209 int mirror_lifetime = 0;
211 fprintf(stderr, "libwebsockets test client\n"
212 "(C) Copyright 2010 Andy Green <andy@warmcat.com> "
213 "licensed under LGPL2.1\n");
219 n = getopt_long(argc, argv, "nuv:khsp:", options, NULL);
224 use_ssl = 2; /* 2 = allow selfsigned */
230 opts = LWS_WRITE_CLIENT_IGNORE_XOR_MASK;
233 ietf_version = atoi(optarg);
249 address = argv[optind];
252 * create the websockets context. This tracks open connections and
253 * knows how to route any traffic and which protocol version to use,
254 * and if each connection is client or server side.
256 * For this client-only demo, we tell it to not listen on any port.
259 context = libwebsocket_create_context(CONTEXT_PORT_NO_LISTEN, NULL,
260 protocols, libwebsocket_internal_extensions,
261 NULL, NULL, -1, -1, 0, NULL);
262 if (context == NULL) {
263 fprintf(stderr, "Creating libwebsocket context failed\n");
268 /* create a client websocket using dumb increment protocol */
270 wsi_dumb = libwebsocket_client_connect(context, address, port, use_ssl,
271 "/", argv[optind], argv[optind],
272 protocols[PROTOCOL_DUMB_INCREMENT].name, ietf_version);
274 if (wsi_dumb == NULL) {
275 fprintf(stderr, "libwebsocket dumb connect failed\n");
279 fprintf(stderr, "Websocket connections opened\n");
282 * sit there servicing the websocket context to handle incoming
283 * packets, and drawing random circles on the mirror protocol websocket
287 while (n >= 0 && !was_closed) {
288 n = libwebsocket_service(context, 1000);
293 if (wsi_mirror == NULL) {
295 /* create a client websocket using mirror protocol */
297 wsi_mirror = libwebsocket_client_connect(context,
298 address, port, use_ssl, "/",
299 argv[optind], argv[optind],
300 protocols[PROTOCOL_LWS_MIRROR].name,
303 if (wsi_mirror == NULL) {
304 fprintf(stderr, "libwebsocket "
305 "dumb connect failed\n");
309 mirror_lifetime = 10 + (random() & 1023);
311 fprintf(stderr, "opened mirror connection with "
312 "%d lifetime\n", mirror_lifetime);
317 if (mirror_lifetime == 0) {
318 fprintf(stderr, "closing mirror session\n");
319 libwebsocket_close_and_free_session(context,
320 wsi_mirror, LWS_CLOSE_STATUS_GOINGAWAY);
323 * wsi_mirror will get set to NULL in
324 * callback when close completes
330 fprintf(stderr, "Exiting\n");
332 libwebsocket_context_destroy(context);
337 fprintf(stderr, "Usage: libwebsockets-test-client "
338 "<server address> [--port=<p>] "
339 "[--ssl] [-k] [-v <ver>]\n");