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/*
* Copyright 2017 The Chromium Authors. All rights reserved.
* Copyright (C) 2018 Akamai Technologies 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:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* 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.
*/
#include "config.h"
#include "HeaderFieldTokenizer.h"
#include "RFC7230.h"
#include <wtf/text/StringBuilder.h>
namespace WebCore {
HeaderFieldTokenizer::HeaderFieldTokenizer(const String& headerField)
: m_input(headerField)
{
skipSpaces();
}
bool HeaderFieldTokenizer::consume(UChar c)
{
ASSERT(!isTabOrSpace(c));
if (isConsumed() || m_input[m_index] != c)
return false;
++m_index;
skipSpaces();
return true;
}
String HeaderFieldTokenizer::consumeQuotedString()
{
StringBuilder builder;
ASSERT(m_input[m_index] == '"');
++m_index;
while (!isConsumed()) {
if (m_input[m_index] == '"') {
String output = builder.toString();
++m_index;
skipSpaces();
return output;
}
if (m_input[m_index] == '\\') {
++m_index;
if (isConsumed())
return String();
}
builder.append(m_input[m_index]);
++m_index;
}
return String();
}
String HeaderFieldTokenizer::consumeToken()
{
auto start = m_index;
while (!isConsumed() && RFC7230::isTokenCharacter(m_input[m_index]))
++m_index;
if (start == m_index)
return String();
String output = m_input.substring(start, m_index - start);
skipSpaces();
return output;
}
String HeaderFieldTokenizer::consumeTokenOrQuotedString()
{
if (isConsumed())
return String();
if (m_input[m_index] == '"')
return consumeQuotedString();
return consumeToken();
}
void HeaderFieldTokenizer::skipSpaces()
{
while (!isConsumed() && isTabOrSpace(m_input[m_index]))
++m_index;
}
void HeaderFieldTokenizer::consumeBeforeAnyCharMatch(const Vector<UChar>& chars)
{
ASSERT(chars.size() > 0U && chars.size() < 3U);
while (!isConsumed()) {
for (const auto& c : chars) {
if (c == m_input[m_index])
return;
}
++m_index;
}
}
} // namespace WebCore
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