Implement WebSocketExtensionParser
Implement WebSocketExtensionParser, which parses Sec-WebSocket-Extension
header value as specified in RFC6455.
BUG=280910
Review URL: https://chromiumcodereview.appspot.com/23872029
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@224102 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/net/websockets/websocket_extension_parser.h b/net/websockets/websocket_extension_parser.h
new file mode 100644
index 0000000..ef7fe03
--- /dev/null
+++ b/net/websockets/websocket_extension_parser.h
@@ -0,0 +1,59 @@
+// 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.
+
+#ifndef NET_WEBSOCKETS_WEBSOCKET_EXTENSION_PARSER_H_
+#define NET_WEBSOCKETS_WEBSOCKET_EXTENSION_PARSER_H_
+
+#include <string>
+
+#include "base/strings/string_piece.h"
+#include "net/base/net_export.h"
+#include "net/websockets/websocket_extension.h"
+
+namespace net {
+
+class NET_EXPORT_PRIVATE WebSocketExtensionParser {
+ public:
+ WebSocketExtensionParser();
+ ~WebSocketExtensionParser();
+
+ // Parses the given string as a WebSocket extension header value.
+ // This parser assumes some preprocesses are made.
+ // - The parser parses single extension at a time. This means that
+ // the parser parses |extension| in RFC6455 9.1, not |extension-list|.
+ // - There is no newline characters in the input. LWS-concatenation must
+ // have already been done.
+ void Parse(const char* data, size_t size);
+ void Parse(const std::string& data) {
+ Parse(data.data(), data.size());
+ }
+
+ bool has_error() const { return has_error_; }
+ const WebSocketExtension& extension() const { return extension_; }
+
+ private:
+ void Consume(char c);
+ void ConsumeExtension(WebSocketExtension* extension);
+ void ConsumeExtensionParameter(WebSocketExtension::Parameter* parameter);
+ void ConsumeToken(base::StringPiece* token);
+ void ConsumeQuotedToken(std::string* token);
+ void ConsumeSpaces();
+ bool Lookahead(char c);
+ bool ConsumeIfMatch(char c);
+ size_t UnconsumedBytes() const { return end_ - current_; }
+
+ static bool IsControl(char c);
+ static bool IsSeparator(char c);
+
+ const char* current_;
+ const char* end_;
+ bool has_error_;
+ WebSocketExtension extension_;
+
+ DISALLOW_COPY_AND_ASSIGN(WebSocketExtensionParser);
+};
+
+} // namespace net
+
+#endif // NET_WEBSOCKETS_WEBSOCKET_EXTENSION_PARSER_H_
