xref: /third_party/libwebsockets/minimal-examples/ws-server/minimal-ws-server-pmd-bulk/minimal-ws-server-pmd-bulk.c

/*
 * 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 the most minimal http server you can make with lws.
 *
 * 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>

#define LWS_PLUGIN_STATIC
#include "protocol_lws_minimal_pmd_bulk.c"

static struct lws_protocols protocols[] = {
	{ "http", lws_callback_http_dummy, 0, 0, 0, NULL, 0 },
	LWS_PLUGIN_PROTOCOL_MINIMAL_PMD_BULK,
	LWS_PROTOCOL_LIST_TERM
};

static int interrupted, options;

/* pass pointers to shared vars to the protocol */

static const struct lws_protocol_vhost_options pvo_options = {
        NULL,
        NULL,
        "options",              /* pvo name */
        (void *)&options        /* pvo value */
};

static const struct lws_protocol_vhost_options pvo_interrupted = {
        &pvo_options,
        NULL,
        "interrupted",          /* pvo name */
        (void *)&interrupted    /* pvo value */
};

static const struct lws_protocol_vhost_options pvo = {
        NULL,           /* "next" pvo linked-list */
        &pvo_interrupted,       /* "child" pvo linked-list */
        "lws-minimal-pmd-bulk", /* protocol name we belong to on this vhost */
        ""              /* ignored */
};

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,
};

static const struct lws_extension extensions[] = {
	{
		"permessage-deflate",
		lws_extension_callback_pm_deflate,
		"permessage-deflate"
		 "; client_no_context_takeover"
		 "; client_max_window_bits"
	},
	{ NULL, NULL, NULL /* terminator */ }
};

void sigint_handler(int sig)
{
	interrupted = 1;
}

int main(int argc, const char **argv)
{
	struct lws_context_creation_info info;
	struct lws_context *context;
	const char *p;
	int n = 0, logs = LLL_USER | LLL_ERR | LLL_WARN | LLL_NOTICE
			/* for LLL_ verbosity above NOTICE to be built into lws,
			 * lws must have been configured and built with
			 * -DCMAKE_BUILD_TYPE=DEBUG instead of =RELEASE */
			/* | LLL_INFO */ /* | LLL_PARSER */ /* | LLL_HEADER */
			/* | LLL_EXT */ /* | LLL_CLIENT */ /* | LLL_LATENCY */
			/* | LLL_DEBUG */;

	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 + permessage-deflate | visit http://localhost:7681\n");
	lwsl_user("   %s [-n (no exts)] [-c (compressible)] [-b (blob)]\n", argv[0]);

	memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
	info.port = 7681;
	info.mounts = &mount;
	info.protocols = protocols;
	info.pvo = &pvo;
	info.options =
		LWS_SERVER_OPTION_HTTP_HEADERS_SECURITY_BEST_PRACTICES_ENFORCE;

	if (!lws_cmdline_option(argc, argv, "-n"))
		info.extensions = extensions;

	if (lws_cmdline_option(argc, argv, "-c"))
		options |= 1; /* send compressible text */

	if (lws_cmdline_option(argc, argv, "-b"))
		options |= 2; /* send in one giant blob */

	info.pt_serv_buf_size = 32 * 1024;

	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;
}