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/*
* lws-minimal-raw-fallback http-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 from the subdirectory
* "./mount-origin" of the directory it was started in.
* You can change that by changing mount.origin below.
*
* In addition, if the connection does to seem to be talking http, then it
* falls back to a raw echo protocol.
*/
#include <libwebsockets.h>
#include <string.h>
#include <signal.h>
struct pss__raw_echo {
uint8_t buf[2048];
int len;
};
static int interrupted;
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 int
callback_raw_echo(struct lws *wsi, enum lws_callback_reasons reason, void *user,
void *in, size_t len)
{
struct pss__raw_echo *pss = (struct pss__raw_echo *)user;
switch (reason) {
case LWS_CALLBACK_RAW_ADOPT:
lwsl_notice("LWS_CALLBACK_RAW_ADOPT\n");
break;
case LWS_CALLBACK_RAW_RX:
lwsl_notice("LWS_CALLBACK_RAW_RX %ld\n", (long)len);
if (len > sizeof(pss->buf))
len = sizeof(pss->buf);
memcpy(pss->buf, in, len);
pss->len = (int)len;
lws_callback_on_writable(wsi);
break;
case LWS_CALLBACK_RAW_CLOSE:
lwsl_notice("LWS_CALLBACK_RAW_CLOSE\n");
break;
case LWS_CALLBACK_RAW_WRITEABLE:
lwsl_notice("LWS_CALLBACK_RAW_WRITEABLE\n");
lws_write(wsi, pss->buf, (unsigned int)pss->len, LWS_WRITE_HTTP);
break;
default:
break;
}
return lws_callback_http_dummy(wsi, reason, user, in, len);
}
static const struct lws_protocols protocols[] = {
{ "raw-echo", callback_raw_echo, sizeof(struct pss__raw_echo), 2048, 0, NULL, 0 },
LWS_PROTOCOL_LIST_TERM
};
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;
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 raw fallback http server | "
"visit http://localhost:7681\n");
memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
info.port = 7681;
info.protocols = protocols;
info.mounts = &mount;
info.error_document_404 = "/404.html";
info.options =
LWS_SERVER_OPTION_HTTP_HEADERS_SECURITY_BEST_PRACTICES_ENFORCE |
LWS_SERVER_OPTION_FALLBACK_TO_APPLY_LISTEN_ACCEPT_CONFIG;
info.listen_accept_role = "raw-skt";
info.listen_accept_protocol = "raw-echo";
#if defined(LWS_WITH_TLS)
if (lws_cmdline_option(argc, argv, "-s")) {
info.options |= LWS_SERVER_OPTION_DO_SSL_GLOBAL_INIT |
LWS_SERVER_OPTION_ALLOW_NON_SSL_ON_SSL_PORT;
info.ssl_cert_filepath = "localhost-100y.cert";
info.ssl_private_key_filepath = "localhost-100y.key";
if (lws_cmdline_option(argc, argv, "-u"))
info.options |= LWS_SERVER_OPTION_REDIRECT_HTTP_TO_HTTPS;
if (lws_cmdline_option(argc, argv, "-h"))
info.options |= LWS_SERVER_OPTION_ALLOW_HTTP_ON_HTTPS_LISTENER;
}
#endif
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;
}
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