WebSocketExtensionParser.cpp [plain text]
#include "config.h"
#include "WebSocketExtensionParser.h"
#include <wtf/ASCIICType.h>
#include <wtf/text/CString.h>
namespace WebCore {
bool WebSocketExtensionParser::finished()
{
return m_current >= m_end;
}
bool WebSocketExtensionParser::parsedSuccessfully()
{
return m_current == m_end;
}
static bool isSeparator(char character)
{
static const char* separatorCharacters = "()<>@,;:\\\"/[]?={} \t";
const char* p = strchr(separatorCharacters, character);
return p && *p;
}
void WebSocketExtensionParser::skipSpaces()
{
while (m_current < m_end && (*m_current == ' ' || *m_current == '\t'))
++m_current;
}
bool WebSocketExtensionParser::consumeToken()
{
skipSpaces();
const char* start = m_current;
while (m_current < m_end && isASCIIPrintable(*m_current) && !isSeparator(*m_current))
++m_current;
if (start < m_current) {
m_currentToken = String(start, m_current - start);
return true;
}
return false;
}
bool WebSocketExtensionParser::consumeQuotedString()
{
skipSpaces();
if (m_current >= m_end || *m_current != '"')
return false;
Vector<char> buffer;
++m_current;
while (m_current < m_end && *m_current != '"') {
if (*m_current == '\\' && ++m_current >= m_end)
return false;
buffer.append(*m_current);
++m_current;
}
if (m_current >= m_end || *m_current != '"')
return false;
m_currentToken = String::fromUTF8(buffer.data(), buffer.size());
if (m_currentToken.isNull())
return false;
++m_current;
return true;
}
bool WebSocketExtensionParser::consumeQuotedStringOrToken()
{
return consumeQuotedString() || consumeToken();
}
bool WebSocketExtensionParser::consumeCharacter(char character)
{
skipSpaces();
if (m_current < m_end && *m_current == character) {
++m_current;
return true;
}
return false;
}
bool WebSocketExtensionParser::parseExtension(String& extensionToken, HashMap<String, String>& extensionParameters)
{
if (!consumeToken())
return false;
extensionToken = currentToken();
while (consumeCharacter(';')) {
if (!consumeToken())
return false;
String parameterToken = currentToken();
if (consumeCharacter('=')) {
if (consumeQuotedStringOrToken())
extensionParameters.add(parameterToken, currentToken());
else
return false;
} else
extensionParameters.add(parameterToken, String());
}
if (!finished() && !consumeCharacter(','))
return false;
return true;
}
}