mirror of
https://github.com/warmcat/libwebsockets.git
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159 lines
4 KiB
C
159 lines
4 KiB
C
/*
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* lws-minimal-http-server-libuv-foreign
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*
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* Copyright (C) 2018 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 the most minimal http server you can make with lws that
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* uses a libuv event loop created outside lws. It shows how lws can
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* participate in someone else's event loop and clean up after itself.
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*
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* To keep it simple, it serves stuff from the subdirectory
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* "./mount-origin" of the directory it was started in.
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* You can change that by changing mount.origin below.
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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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static struct lws_context *context;
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static const struct lws_http_mount mount = {
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/* .mount_next */ NULL, /* linked-list "next" */
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/* .mountpoint */ "/", /* mountpoint URL */
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/* .origin */ "./mount-origin", /* serve from dir */
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/* .def */ "index.html", /* default filename */
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/* .protocol */ NULL,
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/* .cgienv */ NULL,
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/* .extra_mimetypes */ NULL,
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/* .interpret */ NULL,
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/* .cgi_timeout */ 0,
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/* .cache_max_age */ 0,
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/* .auth_mask */ 0,
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/* .cache_reusable */ 0,
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/* .cache_revalidate */ 0,
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/* .cache_intermediaries */ 0,
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/* .origin_protocol */ LWSMPRO_FILE, /* files in a dir */
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/* .mountpoint_len */ 1, /* char count */
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/* .basic_auth_login_file */ NULL,
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};
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void signal_cb(uv_signal_t *watcher, int signum)
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{
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lwsl_notice("Signal %d caught, exiting...\n", watcher->signum);
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switch (watcher->signum) {
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case SIGTERM:
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case SIGINT:
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break;
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default:
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signal(SIGABRT, SIG_DFL);
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abort();
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break;
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}
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lws_libuv_stop(context);
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}
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/* this logs once a second to show that the foreign loop assets are working */
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static void timer_cb(uv_timer_t *t)
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{
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lwsl_user("Foreign 1Hz timer\n");
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}
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static void lws_uv_close_cb(uv_handle_t *handle)
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{
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}
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static void lws_uv_walk_cb(uv_handle_t *handle, void *arg)
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{
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lwsl_info("%s: closing foreign loop asset: %p (type %d)\n",
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__func__, handle, handle->type);
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uv_close(handle, lws_uv_close_cb);
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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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uv_timer_t timer_outer;
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uv_loop_t loop;
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const char *p;
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int 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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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 http server libuv + foreign loop |"
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" visit http://localhost:7681\n");
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memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
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info.port = 7681;
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info.mounts = &mount;
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info.error_document_404 = "/404.html";
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info.options = LWS_SERVER_OPTION_LIBUV;
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uv_loop_init(&loop);
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uv_timer_init(&loop, &timer_outer);
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uv_timer_start(&timer_outer, timer_cb, 0, 1000);
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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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lws_uv_sigint_cfg(context, 1, signal_cb);
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if (lws_uv_initloop(context, &loop, 0)) {
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lwsl_err("lws_uv_initloop failed\n");
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goto bail;
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}
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lws_libuv_run(context, 0);
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bail:
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lwsl_user("%s: starting exit cleanup...\n", __func__);
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/* cleanup the lws part */
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lws_context_destroy(context);
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lws_context_destroy2(context);
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/* cleanup the foreign loop part */
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lwsl_user("%s: lws context destroyed: cleaning the foreign loop\n",
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__func__);
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/*
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* Instead of walking to close all the foreign assets, it's also
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* fine to close them individually instead as below
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*/
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// uv_timer_stop(&timer_outer);
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// uv_close((uv_handle_t*)&timer_outer, NULL);
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/* close every foreign loop asset unconditionally */
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uv_walk(&loop, lws_uv_walk_cb, NULL);
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/* let it run until everything completed close */
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uv_run(&loop, UV_RUN_DEFAULT);
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/* nothing left in the foreign loop, destroy it */
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uv_loop_close(&loop);
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lwsl_user("%s: exiting...\n", __func__);
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return 0;
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}
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