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libwebsockets/lwsws/http.c

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lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
/*
* libwebsockets web server application
*
* Copyright (C) 2010-2016 Andy Green <andy@warmcat.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation:
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301 USA
*/
#include "lwsws.h"
/* http server gets files from this path */
#define LOCAL_RESOURCE_PATH INSTALL_DATADIR"/libwebsockets-test-server"
char *resource_path = LOCAL_RESOURCE_PATH;
/*
* We take a strict whitelist approach to stop ../ attacks
*/
struct serveable {
const char *urlpath;
const char *mimetype;
};
const char * get_mimetype(const char *file)
{
int n = strlen(file);
if (n < 5)
return NULL;
if (!strcmp(&file[n - 4], ".ico"))
return "image/x-icon";
if (!strcmp(&file[n - 4], ".png"))
return "image/png";
plugins This adds support for dynamically loaded plugins at runtime, which can expose their own protocols or extensions transparently. With these changes lwsws defaults to OFF in cmake, and if enabled it automatically enables plugins and libuv support. Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-06 16:15:40 +08:00
if (!strcmp(&file[n - 4], ".jpg"))
return "image/jpeg";
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
if (!strcmp(&file[n - 5], ".html"))
return "text/html";
if (!strcmp(&file[n - 4], ".css"))
return "text/css";
return NULL;
}
/* this protocol server (always the first one) handles HTTP,
*
* Some misc callbacks that aren't associated with a protocol also turn up only
* here on the first protocol server.
*/
int callback_http(struct lws *wsi, enum lws_callback_reasons reason, void *user,
void *in, size_t len)
{
struct per_session_data__http *pss =
(struct per_session_data__http *)user;
unsigned char buffer[4096 + LWS_PRE];
char leaf_path[1024];
const char *mimetype;
char *other_headers;
post example in test server https://github.com/warmcat/libwebsockets/issues/501 This demonstrates how to do a 303 redirect on POST and provide the results there, in both libwebsockets-test-server and the plugin version. Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-25 10:04:49 +08:00
unsigned char *end, *start;
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
struct timeval tv;
unsigned char *p;
#ifndef LWS_NO_CLIENT
struct per_session_data__http *pss1;
struct lws *wsi1;
#endif
char buf[256];
char b64[64];
int n, m;
#ifdef EXTERNAL_POLL
struct lws_pollargs *pa = (struct lws_pollargs *)in;
#endif
// lwsl_err("%s: reason %d\n", __func__, reason);
switch (reason) {
case LWS_CALLBACK_HTTP:
{
char name[100], rip[50];
lws_get_peer_addresses(wsi, lws_get_socket_fd(wsi), name,
sizeof(name), rip, sizeof(rip));
sprintf(buf, "%s (%s)", name, rip);
lwsl_notice("HTTP connect from %s\n", buf);
}
if (len < 1) {
lws_return_http_status(wsi,
HTTP_STATUS_BAD_REQUEST, NULL);
goto try_to_reuse;
}
#ifndef LWS_NO_CLIENT
if (!strncmp(in, "/proxytest", 10)) {
struct lws_client_connect_info i;
char *rootpath = "/";
const char *p = (const char *)in;
if (lws_get_child(wsi))
break;
pss->client_finished = 0;
memset(&i,0, sizeof(i));
i.context = lws_get_context(wsi);
i.address = "git.libwebsockets.org";
i.port = 80;
i.ssl_connection = 0;
if (p[10])
i.path = (char *)in + 10;
else
i.path = rootpath;
i.host = "git.libwebsockets.org";
i.origin = NULL;
i.method = "GET";
i.parent_wsi = wsi;
i.uri_replace_from = "git.libwebsockets.org/";
i.uri_replace_to = "/proxytest/";
if (!lws_client_connect_via_info(&i)) {
lwsl_err("proxy connect fail\n");
break;
}
break;
}
#endif
post example in test server https://github.com/warmcat/libwebsockets/issues/501 This demonstrates how to do a 303 redirect on POST and provide the results there, in both libwebsockets-test-server and the plugin version. Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-25 10:04:49 +08:00
#if 0
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
/* this example server has no concept of directories */
if (strchr((const char *)in + 1, '/')) {
lws_return_http_status(wsi, HTTP_STATUS_FORBIDDEN, NULL);
goto try_to_reuse;
}
#endif
post example in test server https://github.com/warmcat/libwebsockets/issues/501 This demonstrates how to do a 303 redirect on POST and provide the results there, in both libwebsockets-test-server and the plugin version. Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-25 10:04:49 +08:00
if (strlen(in) >= 12 &&
!strncmp(in + strlen(in) - 12, "/postresults", 12)) {
m = sprintf(buf, "<html><body>Form results: '%s'<br>"
"</body></html>", pss->post_string);
p = buffer + LWS_PRE;
start = p;
end = p + sizeof(buffer) - LWS_PRE;
if (lws_add_http_header_status(wsi, 200, &p, end))
return 1;
if (lws_add_http_header_by_token(wsi,
WSI_TOKEN_HTTP_CONTENT_TYPE,
(unsigned char *)"text/html",
9, &p, end))
return 1;
if (lws_add_http_header_content_length(wsi, m, &p,
end))
return 1;
if (lws_finalize_http_header(wsi, &p, end))
return 1;
n = lws_write(wsi, start, p - start,
LWS_WRITE_HTTP_HEADERS);
if (n < 0)
return 1;
n = lws_write(wsi, (unsigned char *)buf, m, LWS_WRITE_HTTP);
if (n < 0)
return 1;
goto try_to_reuse;
}
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
/* if a legal POST URL, let it continue and accept data */
if (lws_hdr_total_length(wsi, WSI_TOKEN_POST_URI))
return 0;
coverity 160167 resource_path set at cmake may overflow buffer resource_path is configured at cmake time (it's like /usr/share/libwebsockets-test-server) it's true if you gave a >255 char path there it would blow up. It's fixed but again not network-accessible. Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-23 07:40:34 +08:00
strncpy(buf, resource_path, sizeof(buf) - 1);
buf[sizeof(buf) - 1] = '\0';
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
if (strcmp(in, "/")) {
if (*((const char *)in) != '/')
strcat(buf, "/");
strncat(buf, in, sizeof(buf) - strlen(buf) - 1);
} else /* default file to serve */
strcat(buf, "/test.html");
buf[sizeof(buf) - 1] = '\0';
/* refuse to serve files we don't understand */
mimetype = get_mimetype(buf);
if (!mimetype) {
lwsl_err("Unknown mimetype for %s\n", buf);
lws_return_http_status(wsi,
HTTP_STATUS_UNSUPPORTED_MEDIA_TYPE, NULL);
return -1;
}
/* demonstrates how to set a cookie on / */
other_headers = leaf_path;
p = (unsigned char *)leaf_path;
if (!strcmp((const char *)in, "/") &&
!lws_hdr_total_length(wsi, WSI_TOKEN_HTTP_COOKIE)) {
/* this isn't very unguessable but it'll do for us */
gettimeofday(&tv, NULL);
n = sprintf(b64, "test=LWS_%u_%u_COOKIE;Max-Age=360000",
(unsigned int)tv.tv_sec,
(unsigned int)tv.tv_usec);
if (lws_add_http_header_by_name(wsi,
(unsigned char *)"set-cookie:",
(unsigned char *)b64, n, &p,
(unsigned char *)leaf_path + sizeof(leaf_path)))
return 1;
}
if (lws_is_ssl(wsi) && lws_add_http_header_by_name(wsi,
(unsigned char *)
"Strict-Transport-Security:",
(unsigned char *)
"max-age=15768000 ; "
"includeSubDomains", 36, &p,
(unsigned char *)leaf_path +
sizeof(leaf_path)))
return 1;
n = (char *)p - leaf_path;
n = lws_serve_http_file(wsi, buf, mimetype, other_headers, n);
if (n < 0 || ((n > 0) && lws_http_transaction_completed(wsi)))
return -1; /* error or can't reuse connection: close the socket */
/*
* notice that the sending of the file completes asynchronously,
* we'll get a LWS_CALLBACK_HTTP_FILE_COMPLETION callback when
* it's done
*/
break;
case LWS_CALLBACK_HTTP_BODY:
post example in test server https://github.com/warmcat/libwebsockets/issues/501 This demonstrates how to do a 303 redirect on POST and provide the results there, in both libwebsockets-test-server and the plugin version. Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-25 10:04:49 +08:00
lwsl_notice("LWS_CALLBACK_HTTP_BODY: len %d\n", (int)len);
strncpy(pss->post_string, in, sizeof (pss->post_string) -1);
pss->post_string[sizeof(pss->post_string) - 1] = '\0';
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
break;
case LWS_CALLBACK_HTTP_BODY_COMPLETION:
lwsl_notice("LWS_CALLBACK_HTTP_BODY_COMPLETION\n");
post example in test server https://github.com/warmcat/libwebsockets/issues/501 This demonstrates how to do a 303 redirect on POST and provide the results there, in both libwebsockets-test-server and the plugin version. Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-25 10:04:49 +08:00
/*
* the whole of the sent body arrived,
* respond to the client with a redirect to show the
* results
*/
p = (unsigned char *)buf + LWS_PRE;
n = lws_http_redirect(wsi,
HTTP_STATUS_SEE_OTHER, /* 303 */
(unsigned char *)"postresults", 12, /* location + len */
&p, /* temp buffer to use */
p + sizeof(buf) - 1 - LWS_PRE /* buffer len */
);
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
goto try_to_reuse;
case LWS_CALLBACK_HTTP_FILE_COMPLETION:
goto try_to_reuse;
case LWS_CALLBACK_HTTP_WRITEABLE:
cgi post Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-13 11:42:53 +08:00
// lwsl_notice("LWS_CALLBACK_HTTP_WRITEABLE\n");
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
#ifdef LWS_WITH_CGI
if (pss->reason_bf & 1) {
cgi post Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-13 11:42:53 +08:00
if (lws_cgi_write_split_stdout_headers(wsi) < 0) {
lwsl_debug("lws_cgi_write_split_stdout_headers says close\n");
return -1;
}
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
pss->reason_bf &= ~1;
break;
}
client http Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-18 17:26:14 +08:00
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
#endif
#ifndef LWS_NO_CLIENT
if (pss->reason_bf & 2) {
char *px = buf + LWS_PRE;
int lenx = sizeof(buf) - LWS_PRE;
/*
* our sink is writeable and our source has something
* to read. So read a lump of source material of
* suitable size to send or what's available, whichever
* is the smaller.
*/
pss->reason_bf &= ~2;
wsi1 = lws_get_child(wsi);
if (!wsi1)
break;
if (lws_http_client_read(wsi1, &px, &lenx) < 0)
cgi post Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-13 11:42:53 +08:00
return -1;
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
if (pss->client_finished)
return -1;
break;
}
cgi post Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-13 11:42:53 +08:00
#endif
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
break;
#ifndef LWS_NO_CLIENT
client http Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-18 17:26:14 +08:00
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
case LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP: {
char ctype[64], ctlen = 0;
lwsl_err("LWS_CALLBACK_ESTABLISHED_CLIENT_HTTP\n");
p = buffer + LWS_PRE;
end = p + sizeof(buffer) - LWS_PRE;
if (lws_add_http_header_status(lws_get_parent(wsi), 200, &p, end))
return 1;
if (lws_add_http_header_by_token(lws_get_parent(wsi),
WSI_TOKEN_HTTP_SERVER,
(unsigned char *)"libwebsockets",
13, &p, end))
return 1;
ctlen = lws_hdr_copy(wsi, ctype, sizeof(ctype), WSI_TOKEN_HTTP_CONTENT_TYPE);
if (ctlen > 0) {
if (lws_add_http_header_by_token(lws_get_parent(wsi),
WSI_TOKEN_HTTP_CONTENT_TYPE,
(unsigned char *)ctype, ctlen, &p, end))
return 1;
}
#if 0
if (lws_add_http_header_content_length(lws_get_parent(wsi),
file_len, &p, end))
return 1;
#endif
if (lws_finalize_http_header(lws_get_parent(wsi), &p, end))
return 1;
*p = '\0';
lwsl_info("%s\n", buffer + LWS_PRE);
n = lws_write(lws_get_parent(wsi), buffer + LWS_PRE,
p - (buffer + LWS_PRE),
LWS_WRITE_HTTP_HEADERS);
if (n < 0)
return -1;
break; }
case LWS_CALLBACK_CLOSED_CLIENT_HTTP:
//lwsl_err("LWS_CALLBACK_CLOSED_CLIENT_HTTP\n");
return -1;
break;
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP:
//lwsl_err("LWS_CALLBACK_RECEIVE_CLIENT_HTTP: wsi %p\n", wsi);
assert(lws_get_parent(wsi));
if (!lws_get_parent(wsi))
break;
// lwsl_err("LWS_CALLBACK_RECEIVE_CLIENT_HTTP: wsi %p: sock: %d, parent_wsi: %p, parent_sock:%d, len %d\n",
// wsi, lws_get_socket_fd(wsi),
// lws_get_parent(wsi),
// lws_get_socket_fd(lws_get_parent(wsi)), len);
pss1 = lws_wsi_user(lws_get_parent(wsi));
pss1->reason_bf |= 2;
lws_callback_on_writable(lws_get_parent(wsi));
break;
case LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ:
//lwsl_err("LWS_CALLBACK_RECEIVE_CLIENT_HTTP_READ len %d\n", len);
assert(lws_get_parent(wsi));
m = lws_write(lws_get_parent(wsi), (unsigned char *)in,
len, LWS_WRITE_HTTP);
if (m < 0)
return -1;
break;
case LWS_CALLBACK_COMPLETED_CLIENT_HTTP:
//lwsl_err("LWS_CALLBACK_COMPLETED_CLIENT_HTTP\n");
assert(lws_get_parent(wsi));
if (!lws_get_parent(wsi))
break;
pss1 = lws_wsi_user(lws_get_parent(wsi));
pss1->client_finished = 1;
break;
#endif
#ifdef LWS_WITH_CGI
/* CGI IO events (POLLIN/OUT) appear here our demo user code policy is
*
* - POST data goes on subprocess stdin
* - subprocess stdout goes on http via writeable callback
* - subprocess stderr goes to the logs
*/
case LWS_CALLBACK_CGI:
pss->args = *((struct lws_cgi_args *)in);
//lwsl_notice("LWS_CALLBACK_CGI: ch %d\n", pss->args.ch);
switch (pss->args.ch) { /* which of stdin/out/err ? */
case LWS_STDIN:
/* TBD stdin rx flow control */
break;
cgi post Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-13 11:42:53 +08:00
case LWS_STDOUT:;
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
pss->reason_bf |= 1;
/* when writing to MASTER would not block */
lws_callback_on_writable(wsi);
break;
case LWS_STDERR:
n = read(lws_get_socket_fd(pss->args.stdwsi[LWS_STDERR]),
buf, 127);
//lwsl_notice("stderr reads %d\n", n);
if (n > 0) {
if (buf[n - 1] != '\n')
buf[n++] = '\n';
buf[n] = '\0';
lwsl_notice("CGI-stderr: %s\n", buf);
}
break;
}
break;
case LWS_CALLBACK_CGI_TERMINATED:
//lwsl_notice("LWS_CALLBACK_CGI_TERMINATED\n");
/* because we sent on openended http, close the connection */
return -1;
case LWS_CALLBACK_CGI_STDIN_DATA: /* POST body for stdin */
cgi post Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-13 11:42:53 +08:00
lwsl_notice("LWS_CALLBACK_CGI_STDIN_DATA\n");
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
pss->args = *((struct lws_cgi_args *)in);
cgi post Signed-off-by: Andy Green <andy@warmcat.com>
2016-04-13 11:42:53 +08:00
pss->args.data[pss->args.len] = '\0';
//lwsl_err("(stdin fd = %d) %s\n", lws_get_socket_fd(pss->args.stdwsi[LWS_STDIN]), pss->args.data);
lwsws Libwebsockets Web Server This makes a start on the LibWebSockets WebServer. The app cmake build support and JSON config parsing are implemented and the app can start, create the vhosts, listen and serve file:// mounts on them. Signed-off-by: Andy Green <andy@warmcat.com>
2016-03-28 10:12:37 +08:00
n = write(lws_get_socket_fd(pss->args.stdwsi[LWS_STDIN]),
pss->args.data, pss->args.len);
//lwsl_notice("LWS_CALLBACK_CGI_STDIN_DATA: write says %d", n);
if (n < pss->args.len)
lwsl_notice("LWS_CALLBACK_CGI_STDIN_DATA: sent %d only %d went",
n, pss->args.len);
return n;
#endif
/*
* callbacks for managing the external poll() array appear in
* protocol 0 callback
*/
case LWS_CALLBACK_LOCK_POLL:
test_server_lock(len);
break;
case LWS_CALLBACK_UNLOCK_POLL:
test_server_unlock(len);
break;
case LWS_CALLBACK_GET_THREAD_ID:
/* return pthread_getthreadid_np(); */
break;
default:
break;
}
return 0;
/* if we're on HTTP1.1 or 2.0, will keep the idle connection alive */
try_to_reuse:
if (lws_http_transaction_completed(wsi))
return -1;
return 0;
}
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