mirror of
https://libwebsockets.org/repo/libwebsockets
synced 2024-12-25 23:00:12 +00:00
149 lines
3.8 KiB
C
149 lines
3.8 KiB
C
/*
|
|
* lws-minimal-http-server-form-get
|
|
*
|
|
* 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 a minimal http server that performs a form GET with a couple
|
|
* of parameters. It dumps the parameters to the console log and redirects
|
|
* to another page.
|
|
*/
|
|
|
|
#include <libwebsockets.h>
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
|
|
static int interrupted;
|
|
|
|
static const char * param_names[] = {
|
|
"text1",
|
|
"send"
|
|
};
|
|
|
|
static int
|
|
callback_http(struct lws *wsi, enum lws_callback_reasons reason, void *user,
|
|
void *in, size_t len)
|
|
{
|
|
uint8_t buf[LWS_PRE + LWS_RECOMMENDED_MIN_HEADER_SPACE],
|
|
*start = &buf[LWS_PRE], *p = start,
|
|
*end = &buf[sizeof(buf) - 1];
|
|
int n;
|
|
|
|
switch (reason) {
|
|
case LWS_CALLBACK_HTTP:
|
|
|
|
if (!lws_hdr_total_length(wsi, WSI_TOKEN_GET_URI))
|
|
/* not a GET */
|
|
break;
|
|
lwsl_err("%s: %s\n", __func__, (const char *)in);
|
|
if (strcmp((const char *)in, "/form1"))
|
|
/* not our form URL */
|
|
break;
|
|
|
|
/* we just dump the decoded things to the log */
|
|
|
|
for (n = 0; n < (int)LWS_ARRAY_SIZE(param_names); n++) {
|
|
int rv = lws_get_urlarg_by_name_safe(wsi, param_names[n],
|
|
(char *)buf, sizeof(buf));
|
|
if (rv < 0)
|
|
lwsl_user("%s: undefined\n", param_names[n]);
|
|
else
|
|
lwsl_user("%s: (len %d) '%s'\n", param_names[n],
|
|
(int)rv, buf);
|
|
}
|
|
|
|
/*
|
|
* Our response is to redirect to a static page. We could
|
|
* have generated a dynamic html page here instead.
|
|
*/
|
|
|
|
if (lws_http_redirect(wsi, HTTP_STATUS_MOVED_PERMANENTLY,
|
|
(unsigned char *)"after-form1.html",
|
|
16, &p, end) < 0)
|
|
return -1;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return lws_callback_http_dummy(wsi, reason, user, in, len);
|
|
}
|
|
|
|
static struct lws_protocols protocols[] = {
|
|
{ "http", callback_http, 0, 0, 0, NULL, 0 },
|
|
LWS_PROTOCOL_LIST_TERM
|
|
};
|
|
|
|
/* default mount serves the URL space from ./mount-origin */
|
|
|
|
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,
|
|
/* .cache_no */ 0,
|
|
/* .origin_protocol */ LWSMPRO_FILE, /* files in a dir */
|
|
/* .mountpoint_len */ 1, /* char count */
|
|
/* .basic_auth_login_file */ NULL,
|
|
};
|
|
|
|
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 http server GET | visit http://localhost:7681\n");
|
|
|
|
memset(&info, 0, sizeof info); /* otherwise uninitialized garbage */
|
|
info.port = 7681;
|
|
info.protocols = protocols;
|
|
info.mounts = &mount;
|
|
info.options =
|
|
LWS_SERVER_OPTION_HTTP_HEADERS_SECURITY_BEST_PRACTICES_ENFORCE;
|
|
|
|
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;
|
|
}
|