1 /*
2 * lws-minimal-ws-server
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 the most minimal http server you can make with lws.
10 *
11 * To keep it simple, it serves stuff in the subdirectory "./mount-origin" of
12 * the directory it was started in.
13 * You can change that by changing mount.origin.
14 */
15
16 #include <libwebsockets.h>
17 #include <string.h>
18 #include <signal.h>
19
20 #define LWS_PLUGIN_STATIC
21 #include "protocol_lws_minimal_pmd_bulk.c"
22
23 static struct lws_protocols protocols[] = {
24 { "http", lws_callback_http_dummy, 0, 0 },
25 LWS_PLUGIN_PROTOCOL_MINIMAL_PMD_BULK,
26 { NULL, NULL, 0, 0 } /* terminator */
27 };
28
29 static int interrupted, options;
30
31 /* pass pointers to shared vars to the protocol */
32
33 static const struct lws_protocol_vhost_options pvo_options = {
34 NULL,
35 NULL,
36 "options", /* pvo name */
37 (void *)&options /* pvo value */
38 };
39
40 static const struct lws_protocol_vhost_options pvo_interrupted = {
41 &pvo_options,
42 NULL,
43 "interrupted", /* pvo name */
44 (void *)&interrupted /* pvo value */
45 };
46
47 static const struct lws_protocol_vhost_options pvo = {
48 NULL, /* "next" pvo linked-list */
49 &pvo_interrupted, /* "child" pvo linked-list */
50 "lws-minimal-pmd-bulk", /* protocol name we belong to on this vhost */
51 "" /* ignored */
52 };
53
54 static const struct lws_http_mount mount = {
55 /* .mount_next */ NULL, /* linked-list "next" */
56 /* .mountpoint */ "/", /* mountpoint URL */
57 /* .origin */ "./mount-origin", /* serve from dir */
58 /* .def */ "index.html", /* default filename */
59 /* .protocol */ NULL,
60 /* .cgienv */ NULL,
61 /* .extra_mimetypes */ NULL,
62 /* .interpret */ NULL,
63 /* .cgi_timeout */ 0,
64 /* .cache_max_age */ 0,
65 /* .auth_mask */ 0,
66 /* .cache_reusable */ 0,
67 /* .cache_revalidate */ 0,
68 /* .cache_intermediaries */ 0,
69 /* .origin_protocol */ LWSMPRO_FILE, /* files in a dir */
70 /* .mountpoint_len */ 1, /* char count */
71 /* .basic_auth_login_file */ NULL,
72 };
73
74 static const struct lws_extension extensions[] = {
75 {
76 "permessage-deflate",
77 lws_extension_callback_pm_deflate,
78 "permessage-deflate"
79 "; client_no_context_takeover"
80 "; client_max_window_bits"
81 },
82 { NULL, NULL, NULL /* terminator */ }
83 };
84
sigint_handler(int sig)85 void sigint_handler(int sig)
86 {
87 interrupted = 1;
88 }
89
main(int argc,const char ** argv)90 int main(int argc, const char **argv)
91 {
92 struct lws_context_creation_info info;
93 struct lws_context *context;
94 const char *p;
95 int n = 0, logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE
96 /* for LLL_ verbosity above NOTICE to be built into lws,
97 * lws must have been configured and built with
98 * -DCMAKE_BUILD_TYPE=DEBUG instead of =RELEASE */
99 /* | LLL_INFO */ /* | LLL_PARSER */ /* | LLL_HEADER */
100 /* | LLL_EXT */ /* | LLL_CLIENT */ /* | LLL_LATENCY */
101 /* | LLL_DEBUG */;
102
103 signal(SIGINT, sigint_handler);
104
105 if ((p = lws_cmdline_option(argc, argv, "-d")))
106 logs = atoi(p);
107
108 lws_set_log_level(logs, NULL);
109 lwsl_user("LWS minimal ws server + permessage-deflate | visit http://localhost:7681\n");
110 lwsl_user(" %s [-n (no exts)] [-c (compressible)] [-b (blob)]\n", argv[0]);
111
112 memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
113 info.port = 7681;
114 info.mounts = &mount;
115 info.protocols = protocols;
116 info.pvo = &pvo;
117 info.options =
118 LWS_SERVER_OPTION_HTTP_HEADERS_SECURITY_BEST_PRACTICES_ENFORCE;
119
120 if (!lws_cmdline_option(argc, argv, "-n"))
121 info.extensions = extensions;
122
123 if (lws_cmdline_option(argc, argv, "-c"))
124 options |= 1; /* send compressible text */
125
126 if (lws_cmdline_option(argc, argv, "-b"))
127 options |= 2; /* send in one giant blob */
128
129 info.pt_serv_buf_size = 32 * 1024;
130
131 context = lws_create_context(&info);
132 if (!context) {
133 lwsl_err("lws init failed\n");
134 return 1;
135 }
136
137 while (n >= 0 && !interrupted)
138 n = lws_service(context, 0);
139
140 lws_context_destroy(context);
141
142 return 0;
143 }
144