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
23static struct lws_protocols protocols[] = {
24	{ "http", lws_callback_http_dummy, 0, 0, 0, NULL, 0 },
25	LWS_PLUGIN_PROTOCOL_MINIMAL_PMD_BULK,
26	LWS_PROTOCOL_LIST_TERM
27};
28
29static int interrupted, options;
30
31/* pass pointers to shared vars to the protocol */
32
33static const struct lws_protocol_vhost_options pvo_options = {
34        NULL,
35        NULL,
36        "options",              /* pvo name */
37        (void *)&options        /* pvo value */
38};
39
40static const struct lws_protocol_vhost_options pvo_interrupted = {
41        &pvo_options,
42        NULL,
43        "interrupted",          /* pvo name */
44        (void *)&interrupted    /* pvo value */
45};
46
47static 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
54static 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
74static 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
85void sigint_handler(int sig)
86{
87	interrupted = 1;
88}
89
90int 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