/*
 * lws-minimal-http-server-tls
 *
 * 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,
 * with three extra lines giving it tls (ssl) capabilities, which in
 * turn allow operation with HTTP/2 if lws was configured for it.
 *
 * To keep it simple, it serves stuff from the subdirectory
 * "./mount-origin" of the directory it was started in.
 *
 * You can change that by changing mount.origin below.
 */

#include <libwebsockets.h>

enum {
	LWS_SW_PORT,
	LWS_SW_H,
	LWS_SW_HELP,
};

static const struct lws_switches switches[] = {
	[LWS_SW_PORT]	= { "-p",          "Port to connect or listen on" },
	[LWS_SW_H]	= { "-h",              "Strict Host Check / Help" },
	[LWS_SW_HELP]	= { "--help",		"Show this help information" },
};

#include <string.h>
#include <signal.h>
#include <errno.h>

static int interrupted;

#if defined(LWS_WITH_PLUGINS)
static const char * const plugin_dirs[] = {
	LWS_PLUGIN_DIR "/",
	NULL
};
#endif

static const struct lws_http_mount
#if defined(LWS_WITH_SYS_METRICS)
	mount_metrics = {
	.mountpoint		= "/metrics",		/* mountpoint URL */
	.origin			= "lws-openmetrics",	/* serve from dir */
	.def			= "x",			/* default filename */
	.protocol		= "lws-openmetrics",
	.origin_protocol	= LWSMPRO_CALLBACK,	/* bind to callback */
	.mountpoint_len		= 8,			/* char count */
	},
#endif
	mount = {
#if defined(LWS_WITH_SYS_METRICS)
	.mount_next		= &mount_metrics,	/* linked-list "next" */
#endif
	.mountpoint		= "/",			/* mountpoint URL */
	.origin			= "./mount-origin",	/* serve from dir */
	.def			= "index.html",		/* default filename */
	.protocol		= "http-only",
	.origin_protocol	= LWSMPRO_FILE,		/* files in a dir */
	.mountpoint_len		= 1,			/* char count */
};

#if !defined(WIN32)
void sigint_handler(int sig, siginfo_t *siginfo, void *context)
{
	pid_t sender_pid = siginfo->si_pid;
	lwsl_err("%s: sig %d from pid %lu\n", __func__, sig, (unsigned long)sender_pid);
	interrupted = 1;
}
#else
void sigint_handler(int sig)
{
	interrupted = 1;
}
#endif

int main(int argc, const char **argv)
{
	struct lws_context_creation_info info;
	struct lws_context *context;
#if !defined(WIN32)
	struct sigaction siga;
#endif
	const char *p;
	int n = 0;

#if !defined(WIN32)
	(void)switches;

	if ((argc == 1) || lws_cmdline_option(argc, argv, switches[LWS_SW_HELP].sw)) {
		lws_switches_print_help(argv[0], switches, LWS_ARRAY_SIZE(switches));
		return 0;
	}

	memset(&siga, 0, sizeof(siga));
	siga.sa_sigaction = sigint_handler;
	siga.sa_flags |= SA_SIGINFO; // get detail info

	    // change signal action,
	if (sigaction(SIGINT, &siga, NULL) != 0) {
	        printf("error sigaction()");
	        return errno;
	    }
#else
	signal(SIGINT, sigint_handler);
#endif
	lws_context_info_defaults(&info, NULL);
	lws_cmdline_option_handle_builtin(argc, argv, &info);
	info.fd_limit_per_thread = 0;
	lwsl_user("LWS minimal http server TLS | visit https://localhost:7681\n");

	if (!info.port)
		info.port = 7681;
	if ((p = lws_cmdline_option(argc, argv, switches[LWS_SW_PORT].sw)))
		{
			int __pt = atoi(p);
			if (__pt < 0 || __pt > 65535) {
				lwsl_err("Port %d is outside valid 16-bit range\n", __pt);
				return 1;
			}
			info.port = __pt;
		}
	info.mounts = &mount;
	info.error_document_404 = "/404.html";
	info.options = LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT |
		LWS_SERVER_OPTION_HTTP_HEADERS_SECURITY_BEST_PRACTICES_ENFORCE;
	info.ssl_cert_filepath = "localhost-100y.cert";
	info.ssl_private_key_filepath = "localhost-100y.key";
	info.fo_listen_queue = 32;

#if defined(LWS_WITH_PLUGINS)
	info.plugin_dirs = plugin_dirs;
#endif

	if (lws_cmdline_option(argc, argv, switches[LWS_SW_H].sw))
		info.options |= LWS_SERVER_OPTION_VHOST_UPG_STRICT_HOST_CHECK;

	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;
}
