mirror of
https://libwebsockets.org/repo/libwebsockets
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133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/*
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* lws-minimal-ws-client-pmd-bulk
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*
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* Written in 2010-2019 by Andy Green <andy@warmcat.com>
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*
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* This file is made available under the Creative Commons CC0 1.0
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* Universal Public Domain Dedication.
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*
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* This demonstrates a ws client that sends bulk data in multiple
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* ws fragments, in a way compatible with per-message deflate.
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*
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* It shows how to send huge messages without needing a lot of memory.
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*
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* Build and start the minimal-examples/ws-server/minmal-ws-server-pmd-bulk
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* example first. Running this sends a large message to the server and
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* exits.
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*
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* If you give both sides the -n commandline option, it disables permessage-
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* deflate compression extension.
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*/
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#include <libwebsockets.h>
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#include <string.h>
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#include <signal.h>
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#define LWS_PLUGIN_STATIC
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#include "protocol_lws_minimal_pmd_bulk.c"
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static struct lws_protocols protocols[] = {
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{ "http", lws_callback_http_dummy, 0, 0, 0, NULL, 0 },
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LWS_PLUGIN_PROTOCOL_MINIMAL_PMD_BULK,
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LWS_PROTOCOL_LIST_TERM
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};
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static int interrupted, options;
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/* pass pointers to shared vars to the protocol */
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static const struct lws_protocol_vhost_options pvo_options = {
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NULL,
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NULL,
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"options", /* pvo name */
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(void *)&options /* pvo value */
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};
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static const struct lws_protocol_vhost_options pvo_interrupted = {
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&pvo_options,
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NULL,
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"interrupted", /* pvo name */
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(void *)&interrupted /* pvo value */
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};
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static const struct lws_protocol_vhost_options pvo = {
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NULL, /* "next" pvo linked-list */
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&pvo_interrupted, /* "child" pvo linked-list */
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"lws-minimal-pmd-bulk", /* protocol name we belong to on this vhost */
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"" /* ignored */
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};
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static const struct lws_extension extensions[] = {
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{
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"permessage-deflate",
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lws_extension_callback_pm_deflate,
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"permessage-deflate"
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"; client_no_context_takeover"
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"; client_max_window_bits"
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},
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{ NULL, NULL, NULL /* terminator */ }
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};
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void sigint_handler(int sig)
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{
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interrupted = 1;
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}
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int main(int argc, const char **argv)
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{
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struct lws_context_creation_info info;
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struct lws_context *context;
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const char *p;
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int n = 0, logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE
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/* for LLL_ verbosity above NOTICE to be built into lws,
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* lws must have been configured and built with
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* -DCMAKE_BUILD_TYPE=DEBUG instead of =RELEASE */
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/* | LLL_INFO */ /* | LLL_PARSER */ /* | LLL_HEADER */
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/* | LLL_EXT */ /* | LLL_CLIENT */ /* | LLL_LATENCY */
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/* | LLL_DEBUG */;
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signal(SIGINT, sigint_handler);
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if ((p = lws_cmdline_option(argc, argv, "-d")))
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logs = atoi(p);
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lws_set_log_level(logs, NULL);
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lwsl_user("LWS minimal ws client + permessage-deflate + multifragment bulk message\n");
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lwsl_user(" needs minimal-ws-server-pmd-bulk running to communicate with\n");
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lwsl_user(" %s [-n (no exts)] [-c (compressible)]\n", argv[0]);
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memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
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info.port = CONTEXT_PORT_NO_LISTEN;
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info.protocols = protocols;
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info.pvo = &pvo;
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if (!lws_cmdline_option(argc, argv, "-n"))
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info.extensions = extensions;
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info.pt_serv_buf_size = 32 * 1024;
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if (lws_cmdline_option(argc, argv, "-c"))
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options |= 1;
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/*
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* since we know this lws context is only ever going to be used with
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* one client wsis / fds / sockets at a time, let lws know it doesn't
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* have to use the default allocations for fd tables up to ulimit -n.
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* It will just allocate for 1 internal and 1 (+ 1 http2 nwsi) that we
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* will use.
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*/
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info.fd_limit_per_thread = 1 + 1 + 1;
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context = lws_create_context(&info);
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if (!context) {
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lwsl_err("lws init failed\n");
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return 1;
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}
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while (n >= 0 && !interrupted)
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n = lws_service(context, 0);
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lws_context_destroy(context);
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lwsl_user("Completed %s\n", interrupted == 2 ? "OK" : "failed");
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return interrupted != 2;
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}
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