Support parsing a Sec-WebSocket-Extensions header with multiple elements

net/websockets/websocket_extension_parser.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/websockets/websocket_extension_parser.h"
 
 #include "base/strings/string_util.h"
 
 namespace net {
 
 WebSocketExtensionParser::WebSocketExtensionParser() {}
 
 WebSocketExtensionParser::~WebSocketExtensionParser() {}
 
 void WebSocketExtensionParser::Parse(const char* data, size_t size) {
   current_ = data;
   end_ = data + size;
   has_error_ = false;
+  extensions_.clear();
 
-  ConsumeExtension(&extension_);
-  if (has_error_) return;
-  ConsumeSpaces();
-  has_error_ = has_error_ || (current_ != end_);
+  while (true) {
+    WebSocketExtension extension;
+    ConsumeExtension(&extension);
+    if (has_error_)
+      break;
+    extensions_.push_back(extension);
+
+    ConsumeSpaces();
+    DCHECK(!has_error_);
+
+    if (!ConsumeIfMatch(',')) {
+      break;
+    }
+  }
+
+  has_error_ = has_error_ || current_ != end_;
+  if (has_error_)
+    extensions_.clear();
 }
 
 void WebSocketExtensionParser::Consume(char c) {
   DCHECK(!has_error_);
   ConsumeSpaces();
   DCHECK(!has_error_);
   if (current_ == end_ || c != current_[0]) {
     has_error_ = true;
     return;
   }
@@ skipping 115 matching lines @@
   return (0 <= c && c <= 31) || c == 127;
 }
 
 // static
 bool WebSocketExtensionParser::IsSeparator(char c) {
   const char separators[] = "()<>@,;:\\\"/[]?={} \t";
   return strchr(separators, c) != NULL;
 }
 
 }  // namespace net