minimal-examples/http-server/minimal-http-server-eventlib-smp/minimal-http-server-eventlib-smp.c

   1 /*
   2  * lws-minimal-http-server-eventlib-smp
   3  *
   4  * Written in 2010-2019 by Andy Green <andy@warmcat.com>
   5  *
   6  * This file is made available under the Creative Commons CC0 1.0
   7  * Universal Public Domain Dedication.
   8  *
   9  * This demonstrates a minimal http[s] server that can work with any of the
  10  * supported event loop backends, or the default poll() one.
  11  *
  12  * To keep it simple, it serves stuff from the subdirectory
  13  * "./mount-origin" of the directory it was started in.
  14  * You can change that by changing mount.origin below.
  15  */
  16
  17 #include <libwebsockets.h>
  18 #include <string.h>
  19 #include <signal.h>
  20
  21 #include <pthread.h>
  22
  23 #define COUNT_THREADS 8
  24
  25 static struct lws_context *context;
  26 static volatile int interrupted;
  27
  28 static const struct lws_http_mount mount = {
  29         /* .mount_next */               NULL,           /* linked-list "next" */
  30         /* .mountpoint */               "/",            /* mountpoint URL */
  31         /* .origin */                   "./mount-origin", /* serve from dir */
  32         /* .def */                      "index.html",   /* default filename */
  33         /* .protocol */                 NULL,
  34         /* .cgienv */                   NULL,
  35         /* .extra_mimetypes */          NULL,
  36         /* .interpret */                NULL,
  37         /* .cgi_timeout */              0,
  38         /* .cache_max_age */            0,
  39         /* .auth_mask */                0,
  40         /* .cache_reusable */           0,
  41         /* .cache_revalidate */         0,
  42         /* .cache_intermediaries */     0,
  43         /* .origin_protocol */          LWSMPRO_FILE,   /* files in a dir */
  44         /* .mountpoint_len */           1,              /* char count */
  45         /* .basic_auth_login_file */    NULL,
  46 };
  47
  48 void *thread_service(void *threadid)
  49 {
  50         while (lws_service_tsi(context, 10000,
  51                                (int)(lws_intptr_t)threadid) >= 0 &&
  52                !interrupted)
  53                 ;
  54
  55         pthread_exit(NULL);
  56
  57         return NULL;
  58 }
  59
  60 void signal_cb(void *handle, int signum)
  61 {
  62         interrupted = 1;
  63
  64         switch (signum) {
  65         case SIGTERM:
  66         case SIGINT:
  67                 break;
  68         default:
  69                 lwsl_err("%s: signal %d\n", __func__, signum);
  70                 break;
  71         }
  72         lws_context_destroy(context);
  73 }
  74
  75 void sigint_handler(int sig)
  76 {
  77         signal_cb(NULL, sig);
  78 }
  79
  80 int main(int argc, const char **argv)
  81 {
  82         pthread_t pthread_service[COUNT_THREADS];
  83         struct lws_context_creation_info info;
  84         const char *p;
  85         void *retval;
  86         int n, logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE
  87                         /* for LLL_ verbosity above NOTICE to be built into lws,
  88                          * lws must have been configured and built with
  89                          * -DCMAKE_BUILD_TYPE=DEBUG instead of =RELEASE */
  90                         /* | LLL_INFO */ /* | LLL_PARSER */ /* | LLL_HEADER */
  91                         /* | LLL_EXT */ /* | LLL_CLIENT */ /* | LLL_LATENCY */
  92                         /* | LLL_DEBUG */;
  93
  94         if ((p = lws_cmdline_option(argc, argv, "-d")))
  95                 logs = atoi(p);
  96
  97         lws_set_log_level(logs, NULL);
  98         lwsl_user("LWS minimal http server eventlib SMP | visit http://localhost:7681\n");
  99         lwsl_user(" [-s (ssl)] [--uv (libuv)] [--ev (libev)] [--event (libevent)]\n");
 100         lwsl_user("WARNING: Not stable, under development!\n");
 101
 102         memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
 103         info.port = 7681;
 104         info.mounts = &mount;
 105         info.error_document_404 = "/404.html";
 106         info.pcontext = &context;
 107         info.signal_cb = signal_cb;
 108         info.options =
 109                 LWS_SERVER_OPTION_HTTP_HEADERS_SECURITY_BEST_PRACTICES_ENFORCE;
 110
 111         if ((p = lws_cmdline_option(argc, argv, "-t"))) {
 112                 info.count_threads = atoi(p);
 113                 if (info.count_threads < 1 || info.count_threads > LWS_MAX_SMP)
 114                         return 1;
 115         } else
 116                 info.count_threads = COUNT_THREADS;
 117
 118         if (lws_cmdline_option(argc, argv, "-s")) {
 119                 info.options |= LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT;
 120                 info.ssl_cert_filepath = "localhost-100y.cert";
 121                 info.ssl_private_key_filepath = "localhost-100y.key";
 122         }
 123
 124         if (lws_cmdline_option(argc, argv, "--uv"))
 125                 info.options |= LWS_SERVER_OPTION_LIBUV;
 126         else
 127                 if (lws_cmdline_option(argc, argv, "--event"))
 128                         info.options |= LWS_SERVER_OPTION_LIBEVENT;
 129                 else
 130                         if (lws_cmdline_option(argc, argv, "--ev"))
 131                                 info.options |= LWS_SERVER_OPTION_LIBEV;
 132                         else
 133                                 signal(SIGINT, sigint_handler);
 134
 135         context = lws_create_context(&info);
 136         if (!context) {
 137                 lwsl_err("lws init failed\n");
 138                 return 1;
 139         }
 140
 141         lwsl_notice("  Service threads: %d\n", lws_get_count_threads(context));
 142
 143         /* start all the service threads */
 144
 145         for (n = 0; n < lws_get_count_threads(context); n++)
 146                 if (pthread_create(&pthread_service[n], NULL, thread_service,
 147                                    (void *)(lws_intptr_t)n))
 148                         lwsl_err("Failed to start service thread\n");
 149
 150         /* wait for all the service threads to exit */
 151
 152         while ((--n) >= 0)
 153                 pthread_join(pthread_service[n], &retval);
 154
 155         lwsl_notice("%s: calling external context destroy\n", __func__);
 156         lws_context_destroy(context);
 157
 158         return 0;
 159 }