/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef WebSocketExtensionParser_h
#define WebSocketExtensionParser_h
#include "wtf/HashMap.h"
#include "wtf/text/StringHash.h"
#include "wtf/text/WTFString.h"
namespace WebCore {
class WebSocketExtensionParser {
public:
WebSocketExtensionParser(const char* start, const char* end)
: m_current(start)
, m_end(end)
{
}
bool finished();
bool parsedSuccessfully();
bool parseExtension(String& extensionToken, HashMap<String, String>& parameters);
private:
class ParserStateBackup {
public:
ParserStateBackup(WebSocketExtensionParser* parser)
: m_parser(parser)
, m_current(parser->m_current)
, m_isDisposed(false) { }
~ParserStateBackup();
void dispose() { m_isDisposed = true; }
private:
WebSocketExtensionParser* m_parser;
const char* m_current;
bool m_isDisposed;
};
const String& currentToken() { return m_currentToken; }
// The following member functions basically follow the grammar defined
// in Section 2.2 of RFC 2616.
bool consumeToken();
bool consumeQuotedString();
bool consumeQuotedStringOrToken();
bool consumeCharacter(char);
void skipSpaces();
const char* m_current;
const char* const m_end;
String m_currentToken;
};
} // namespace WebCore
#endif // WebSocketExtensionParser_h