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/*
* lws-minimal-ws-server
*
* 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 minimal ws server that can cooperate with
* other threads cleanly. Two other threads are started, which fill
* a ringbuffer with strings at 10Hz.
*
* The actual work and thread spawning etc are done in the protocol
* implementation in protocol_lws_minimal.c.
*
* To keep it simple, it serves stuff in the subdirectory "./mount-origin" of
* the directory it was started in.
* You can change that by changing mount.origin.
*/
#include <libwebsockets.h>
#include <string.h>
#include <signal.h>
#if defined(WIN32)
#define HAVE_STRUCT_TIMESPEC
#if defined(pid_t)
#undef pid_t
#endif
#endif
#include <pthread.h>
#define LWS_PLUGIN_STATIC
#include "protocol_lws_minimal.c"
#define COUNT_THREADS 2
static struct lws_protocols protocols[] = {
{ "http", lws_callback_http_dummy, 0, 0, 0, NULL, 0 },
LWS_PLUGIN_PROTOCOL_MINIMAL,
LWS_PROTOCOL_LIST_TERM
};
static struct lws_context *context;
static int interrupted, started;
static pthread_t pthread_service[COUNT_THREADS];
static const struct lws_http_mount mount = {
/* .mount_next */ NULL, /* linked-list "next" */
/* .mountpoint */ "/", /* mountpoint URL */
/* .origin */ "./mount-origin", /* serve from dir */
/* .def */ "index.html", /* default filename */
/* .protocol */ NULL,
/* .cgienv */ NULL,
/* .extra_mimetypes */ NULL,
/* .interpret */ NULL,
/* .cgi_timeout */ 0,
/* .cache_max_age */ 0,
/* .auth_mask */ 0,
/* .cache_reusable */ 0,
/* .cache_revalidate */ 0,
/* .cache_intermediaries */ 0,
/* .origin_protocol */ LWSMPRO_FILE, /* files in a dir */
/* .mountpoint_len */ 1, /* char count */
/* .basic_auth_login_file */ NULL,
};
/*
* This demonstrates how to pass a pointer into a specific protocol handler
* running on a specific vhost. In this case, it's our default vhost and
* we pass the pvo named "config" with the value a const char * "myconfig".
*
* This is the preferred way to pass configuration into a specific vhost +
* protocol instance.
*/
static const struct lws_protocol_vhost_options pvo_ops = {
NULL,
NULL,
"config", /* pvo name */
(void *)"myconfig" /* pvo value */
};
static const struct lws_protocol_vhost_options pvo = {
NULL, /* "next" pvo linked-list */
&pvo_ops, /* "child" pvo linked-list */
"lws-minimal", /* protocol name we belong to on this vhost */
"" /* ignored */
};
void *thread_service(void *threadid)
{
while (lws_service_tsi(context, 1000,
(int)(lws_intptr_t)threadid) >= 0 &&
!interrupted)
;
pthread_exit(NULL);
return NULL;
}
static int
system_notify_cb(lws_state_manager_t *mgr, lws_state_notify_link_t *link,
int current, int target)
{
struct lws_context *context = mgr->parent;
void *retval;
if (current != target)
return 0;
switch (current) {
case LWS_SYSTATE_OPERATIONAL:
lwsl_notice(" Service threads: %d\n",
lws_get_count_threads(context));
/* start all the service threads */
for (started = 1; started < lws_get_count_threads(context);
started++)
if (pthread_create(&pthread_service[started], NULL,
thread_service,
(void *)(lws_intptr_t)started))
lwsl_err("Failed to start service thread\n");
break;
case LWS_SYSTATE_CONTEXT_DESTROYING:
/* wait for all the service threads to exit */
while ((--started) >= 1)
pthread_join(pthread_service[started], &retval);
break;
}
return 0;
}
lws_state_notify_link_t notifier = { { NULL, NULL, NULL },
system_notify_cb, "app" };
lws_state_notify_link_t *na[] = { ¬ifier, NULL };
void sigint_handler(int sig)
{
interrupted = 1;
lws_cancel_service(context);
}
int main(int argc, const char **argv)
{
int logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE;
struct lws_context_creation_info info;
const char *p;
int n = 0;
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 server + threads + smp | visit http://localhost:7681\n");
memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
info.port = 7681;
info.mounts = &mount;
info.protocols = protocols;
info.pvo = &pvo; /* per-vhost options */
info.count_threads = COUNT_THREADS;
info.register_notifier_list = na;
info.options =
LWS_SERVER_OPTION_HTTP_HEADERS_SECURITY_BEST_PRACTICES_ENFORCE;
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);
return 0;
}
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