ubus: add CORS header support
[project/uhttpd.git] / client.c
index 6faa21c..9b8fb07 100644 (file)
--- a/client.c
+++ b/client.c
@@ -1,20 +1,20 @@
 /*
  * uhttpd - Tiny single-threaded httpd
  *
- *   Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
- *   Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *   Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
+ *   Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
  *
- *  Licensed under the Apache License, Version 2.0 (the "License");
- *  you may not use this file except in compliance with the License.
- *  You may obtain a copy of the License at
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
  *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- *  Unless required by applicable law or agreed to in writing, software
- *  distributed under the License is distributed on an "AS IS" BASIS,
- *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- *  See the License for the specific language governing permissions and
- *  limitations under the License.
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 
 #include <libubox/blobmsg.h>
@@ -24,6 +24,7 @@
 #include "tls.h"
 
 static LIST_HEAD(clients);
+static bool client_done = false;
 
 int n_clients = 0;
 struct config conf = {};
@@ -38,24 +39,29 @@ const char * const http_methods[] = {
        [UH_HTTP_MSG_GET] = "GET",
        [UH_HTTP_MSG_POST] = "POST",
        [UH_HTTP_MSG_HEAD] = "HEAD",
+       [UH_HTTP_MSG_OPTIONS] = "OPTIONS",
 };
 
 void uh_http_header(struct client *cl, int code, const char *summary)
 {
+       struct http_request *r = &cl->request;
        const char *enc = "Transfer-Encoding: chunked\r\n";
        const char *conn;
 
        if (!uh_use_chunked(cl))
                enc = "";
 
-       if (cl->request.version != UH_HTTP_VER_1_1)
+       if (r->connection_close)
                conn = "Connection: close";
        else
-               conn = "Connection: keep-alive";
+               conn = "Connection: Keep-Alive";
 
        ustream_printf(cl->us, "%s %03i %s\r\n%s\r\n%s",
                http_versions[cl->request.version],
                code, summary, conn, enc);
+
+       if (!r->connection_close)
+               ustream_printf(cl->us, "Keep-Alive: timeout=%d\r\n", conf.http_keepalive);
 }
 
 static void uh_connection_close(struct client *cl)
@@ -69,22 +75,51 @@ static void uh_dispatch_done(struct client *cl)
 {
        if (cl->dispatch.free)
                cl->dispatch.free(cl);
+       if (cl->dispatch.req_free)
+               cl->dispatch.req_free(cl);
+}
+
+static void client_timeout(struct uloop_timeout *timeout)
+{
+       struct client *cl = container_of(timeout, struct client, timeout);
+
+       cl->state = CLIENT_STATE_CLOSE;
+       uh_connection_close(cl);
+}
+
+static void uh_set_client_timeout(struct client *cl, int timeout)
+{
+       cl->timeout.cb = client_timeout;
+       uloop_timeout_set(&cl->timeout, timeout * 1000);
+}
+
+static void uh_keepalive_poll_cb(struct uloop_timeout *timeout)
+{
+       struct client *cl = container_of(timeout, struct client, timeout);
+       int sec = cl->requests > 0 ? conf.http_keepalive : conf.network_timeout;
+
+       uh_set_client_timeout(cl, sec);
+       cl->us->notify_read(cl->us, 0);
+}
+
+static void uh_poll_connection(struct client *cl)
+{
+       cl->timeout.cb = uh_keepalive_poll_cb;
+       uloop_timeout_set(&cl->timeout, 1);
 }
 
 void uh_request_done(struct client *cl)
 {
        uh_chunk_eof(cl);
        uh_dispatch_done(cl);
-       cl->us->notify_write = NULL;
        memset(&cl->dispatch, 0, sizeof(cl->dispatch));
 
-       if (cl->request.version != UH_HTTP_VER_1_1 || !conf.http_keepalive) {
-               uh_connection_close(cl);
-               return;
-       }
+       if (!conf.http_keepalive || cl->request.connection_close)
+               return uh_connection_close(cl);
 
        cl->state = CLIENT_STATE_INIT;
-       uloop_timeout_set(&cl->timeout, conf.http_keepalive * 1000);
+       cl->requests++;
+       uh_poll_connection(cl);
 }
 
 void __printf(4, 5)
@@ -112,14 +147,6 @@ static void uh_header_error(struct client *cl, int code, const char *summary)
        uh_connection_close(cl);
 }
 
-static void client_timeout(struct uloop_timeout *timeout)
-{
-       struct client *cl = container_of(timeout, struct client, timeout);
-
-       cl->state = CLIENT_STATE_CLOSE;
-       uh_connection_close(cl);
-}
-
 static int find_idx(const char * const *list, int max, const char *str)
 {
        int i;
@@ -155,6 +182,9 @@ static int client_parse_request(struct client *cl, char *data)
 
        req->method = h_method;
        req->version = h_version;
+       if (req->version < UH_HTTP_VER_1_1 || req->method == UH_HTTP_MSG_POST ||
+           !conf.http_keepalive)
+               req->connection_close = true;
 
        return CLIENT_STATE_HEADER;
 }
@@ -167,6 +197,11 @@ static bool client_init_cb(struct client *cl, char *buf, int len)
        if (!newline)
                return false;
 
+       if (newline == buf) {
+               ustream_consume(cl->us, 2);
+               return true;
+       }
+
        *newline = 0;
        blob_buf_init(&cl->hdr, 0);
        cl->state = client_parse_request(cl, buf);
@@ -193,12 +228,27 @@ static bool rfc1918_filter_check(struct client *cl)
 
 static void client_header_complete(struct client *cl)
 {
+       struct http_request *r = &cl->request;
+
        if (!rfc1918_filter_check(cl))
                return;
 
-       if (cl->request.expect_cont)
+       if (r->expect_cont)
                ustream_printf(cl->us, "HTTP/1.1 100 Continue\r\n\r\n");
 
+       switch(r->ua) {
+       case UH_UA_MSIE_OLD:
+               if (r->method != UH_HTTP_MSG_POST)
+                       break;
+
+               /* fall through */
+       case UH_UA_SAFARI:
+               r->connection_close = true;
+               break;
+       default:
+               break;
+       }
+
        uh_handle_request(cl);
 }
 
@@ -242,6 +292,37 @@ static void client_parse_header(struct client *cl, char *data)
        } else if (!strcmp(data, "transfer-encoding")) {
                if (!strcmp(val, "chunked"))
                        r->transfer_chunked = true;
+       } else if (!strcmp(data, "connection")) {
+               if (!strcasecmp(val, "close"))
+                       r->connection_close = true;
+       } else if (!strcmp(data, "user-agent")) {
+               char *str;
+
+               if (strstr(val, "Opera"))
+                       r->ua = UH_UA_OPERA;
+               else if ((str = strstr(val, "MSIE ")) != NULL) {
+                       r->ua = UH_UA_MSIE_NEW;
+                       if (str[5] && str[6] == '.') {
+                               switch (str[5]) {
+                               case '6':
+                                       if (strstr(str, "SV1"))
+                                               break;
+                                       /* fall through */
+                               case '5':
+                               case '4':
+                                       r->ua = UH_UA_MSIE_OLD;
+                                       break;
+                               }
+                       }
+               }
+               else if (strstr(val, "Chrome/"))
+                       r->ua = UH_UA_CHROME;
+               else if (strstr(val, "Safari/") && strstr(val, "Mac OS X"))
+                       r->ua = UH_UA_SAFARI;
+               else if (strstr(val, "Gecko/"))
+                       r->ua = UH_UA_GECKO;
+               else if (strstr(val, "Konqueror"))
+                       r->ua = UH_UA_KONQUEROR;
        }
 
 
@@ -363,6 +444,7 @@ void uh_client_read_cb(struct client *cl)
        char *str;
        int len;
 
+       client_done = false;
        do {
                str = ustream_get_read_buf(us, &len);
                if (!str || !len)
@@ -377,11 +459,17 @@ void uh_client_read_cb(struct client *cl)
                                uh_header_error(cl, 413, "Request Entity Too Large");
                        break;
                }
-       } while(1);
+       } while (!client_done);
 }
 
 static void client_close(struct client *cl)
 {
+       if (cl->refcount) {
+               cl->state = CLIENT_STATE_CLEANUP;
+               return;
+       }
+
+       client_done = true;
        n_clients--;
        uh_dispatch_done(cl);
        uloop_timeout_cancel(&cl->timeout);
@@ -400,7 +488,7 @@ void uh_client_notify_state(struct client *cl)
 {
        struct ustream *s = cl->us;
 
-       if (!s->write_error) {
+       if (!s->write_error && cl->state != CLIENT_STATE_CLEANUP) {
                if (cl->state == CLIENT_STATE_DATA)
                        return;
 
@@ -413,14 +501,14 @@ void uh_client_notify_state(struct client *cl)
 
 static void client_ustream_read_cb(struct ustream *s, int bytes)
 {
-       struct client *cl = container_of(s, struct client, sfd);
+       struct client *cl = container_of(s, struct client, sfd.stream);
 
        uh_client_read_cb(cl);
 }
 
 static void client_ustream_write_cb(struct ustream *s, int bytes)
 {
-       struct client *cl = container_of(s, struct client, sfd);
+       struct client *cl = container_of(s, struct client, sfd.stream);
 
        if (cl->dispatch.write_cb)
                cl->dispatch.write_cb(cl);
@@ -428,7 +516,7 @@ static void client_ustream_write_cb(struct ustream *s, int bytes)
 
 static void client_notify_state(struct ustream *s)
 {
-       struct client *cl = container_of(s, struct client, sfd);
+       struct client *cl = container_of(s, struct client, sfd.stream);
 
        uh_client_notify_state(cl);
 }
@@ -484,14 +572,13 @@ bool uh_accept_client(int fd, bool tls)
        cl->us->string_data = true;
        ustream_fd_init(&cl->sfd, sfd);
 
-       cl->timeout.cb = client_timeout;
-       uloop_timeout_set(&cl->timeout, conf.network_timeout * 1000);
-
+       uh_poll_connection(cl);
        list_add_tail(&cl->list, &clients);
 
        next_client = NULL;
        n_clients++;
        cl->id = client_id++;
+       cl->tls = tls;
 
        return true;
 }