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