Feature: Allow OPTIONS request for * and web requests

src/acl.c

@@ -101,7 +101,7 @@ acl_t *acl_new(void)
     ret->refcount = 1;
 
     acl_set_method_str(ret, ACL_POLICY_DENY, "*");
-    acl_set_method_str(ret, ACL_POLICY_ALLOW, "get");
+    acl_set_method_str(ret, ACL_POLICY_ALLOW, "get,options");
 
     acl_set_admin_str(ret, ACL_POLICY_DENY, "*");
     acl_set_admin_str(ret, ACL_POLICY_ALLOW, "buildm3u");

src/cfgfile.c

@@ -399,9 +399,9 @@ static void __append_old_style_urlauth(auth_stack_t **stack,
         xmlSetProp(role, XMLSTR("allow-web"), XMLSTR("*"));
         xmlSetProp(role, XMLSTR("allow-admin"), XMLSTR("*"));
     } else {
-        xmlSetProp(role, XMLSTR("method"), XMLSTR("get,post,head"));
+        xmlSetProp(role, XMLSTR("method"), XMLSTR("get,post,head,options"));
         xmlSetProp(role, XMLSTR("deny-method"), XMLSTR("*"));
-        xmlSetProp(role, XMLSTR("allow-method"), XMLSTR("get,post,head"));
+        xmlSetProp(role, XMLSTR("allow-method"), XMLSTR("get,post,head,options"));
         xmlSetProp(role, XMLSTR("allow-web"), XMLSTR("*"));
         xmlSetProp(role, XMLSTR("deny-admin"), XMLSTR("*"));
     }
@@ -1188,7 +1188,7 @@ static void _parse_mount_oldstyle_authentication(mount_proxy    *mount,
          }
 
          __append_old_style_auth(authstack, NULL, AUTH_TYPE_ANONYMOUS,
-             NULL, NULL, "get,head,post", NULL, 0, NULL);
+             NULL, NULL, "get,head,post,options", NULL, 0, NULL);
      } else if (strcmp(type, AUTH_TYPE_URL) == 0) {
          /* This block is super fun! Attention! Super fun ahead! Ladies and Gentlemen take care and watch your children! */
          /* Stuff that was of help:
@@ -1280,7 +1280,7 @@ static void _parse_mount_oldstyle_authentication(mount_proxy    *mount,
              headers, header_prefix);
          if (listener_add)
              __append_old_style_auth(authstack, NULL, AUTH_TYPE_ANONYMOUS, NULL,
-                 NULL, "get,put,head", NULL, 0, NULL);
+                 NULL, "get,put,head,options", NULL, 0, NULL);
          if (stream_auth)
              __append_old_style_auth(authstack, NULL, AUTH_TYPE_ANONYMOUS, NULL,
                  NULL, "source,put", NULL, 0, NULL);
@@ -1841,7 +1841,7 @@ static void _parse_authentication(xmlDocPtr doc, xmlNodePtr node,
 
     if (admin_password && admin_username)
         __append_old_style_auth(&old_style, "legacy-admin", AUTH_TYPE_STATIC,
-            admin_username, admin_password, NULL, "get,post,head,stats", 1, "*");
+            admin_username, admin_password, NULL, "get,post,head,stats,options", 1, "*");
 
     if (relay_password && relay_username)
         __append_old_style_auth(&old_style, "legacy-relay", AUTH_TYPE_STATIC,
@@ -1865,7 +1865,7 @@ static void _parse_authentication(xmlDocPtr doc, xmlNodePtr node,
 
     /* default unauthed anonymous account */
     __append_old_style_auth(&old_style, "anonymous", AUTH_TYPE_ANONYMOUS,
-        NULL, NULL, NULL, "get,post,head", 1, NULL);
+        NULL, NULL, NULL, "get,post,head,options", 1, NULL);
     if (!old_style)
         ICECAST_LOG_ERROR("BAD. old_style=NULL");
 

src/client.c

@@ -319,6 +319,29 @@ void client_send_101(client_t *client, reuse_t reuse)
     fserve_add_client(client, NULL);
 }
 
+void client_send_204(client_t *client)
+{
+    ssize_t ret;
+
+    if (!client)
+        return;
+
+    client->reuse = ICECAST_REUSE_KEEPALIVE;
+
+    ret = util_http_build_header(client->refbuf->data, PER_CLIENT_REFBUF_SIZE, 0,
+                                 0, 204, NULL,
+                                 NULL, NULL,
+                                 NULL, NULL, client);
+
+    snprintf(client->refbuf->data + ret, PER_CLIENT_REFBUF_SIZE - ret,
+             "Content-Length: 0\r\n\r\n");
+
+    client->respcode = 204;
+    client->refbuf->len = strlen(client->refbuf->data);
+
+    fserve_add_client(client, NULL);
+}
+
 void client_send_426(client_t *client, reuse_t reuse)
 {
     ssize_t ret;

src/client.h

@@ -115,6 +115,7 @@ int client_create (client_t **c_ptr, connection_t *con, http_parser_t *parser);
 void client_destroy(client_t *client);
 void client_send_error_by_id(client_t *client, icecast_error_id_t id);
 void client_send_101(client_t *client, reuse_t reuse);
+void client_send_204(client_t *client);
 void client_send_426(client_t *client, reuse_t reuse);
 admin_format_t client_get_admin_format_by_content_negotiation(client_t *client);
 int client_send_bytes (client_t *client, const void *buf, unsigned len);

src/connection.c

@@ -926,6 +926,11 @@ static void _handle_get_request(client_t *client, char *uri) {
         return;
     }
 
+    if (client->parser->req_type == httpp_req_options) {
+        client_send_204(client);
+        return;
+    }
+
     if (util_check_valid_extension(uri) == XSLT_CONTENT) {
         /* If the file exists, then transform it, otherwise, write a 404 */
         ICECAST_LOG_DEBUG("Stats request, sending XSL transformed stats");
@@ -1209,6 +1214,7 @@ static void _handle_authed_client(client_t *client, void *uri, auth_result resul
             _handle_stats_request(client, uri);
         break;
         case httpp_req_get:
+        case httpp_req_options:
             _handle_get_request(client, uri);
         break;
         default:
@@ -1413,6 +1419,11 @@ static void _handle_connection(void)
                     continue;
                 }
 
+                if (strcmp(rawuri, "*") == 0) {
+                    client_send_204(client);
+                    continue;
+                }
+
                 uri = util_normalise_uri(rawuri);
 
                 if (!uri) {

src/util.c

@@ -710,6 +710,7 @@ ssize_t util_http_build_header(char * out, size_t len, ssize_t offset,
                 case 100: statusmsg = "Continue"; http_version = "1.1"; break;
                 case 101: statusmsg = "Switching Protocols"; http_version = "1.1"; break;
                 case 200: statusmsg = "OK"; break;
+                case 204: statusmsg = "No Content"; break;
                 case 206: statusmsg = "Partial Content"; http_version = "1.1"; break;
                 case 400: statusmsg = "Bad Request"; break;
                 case 401: statusmsg = "Authentication Required"; break;