blob: e49e0cb3afe3e8052fc4de0a477604c921e9e01e [file] [log] [blame]
/*
* Copyright (C) 2020 Sony Interactive Entertainment Inc.
*
* 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 APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 "HTTPParser.h"
#include <wtf/text/StringToIntegerConversion.h>
namespace WebDriver {
HTTPParser::Phase HTTPParser::parse(Vector<uint8_t>&& data)
{
if (!data.isEmpty()) {
m_buffer.appendVector(WTFMove(data));
while (true) {
if (handlePhase() == Process::Suspend)
break;
}
}
return m_phase;
}
HTTPParser::Process HTTPParser::handlePhase()
{
switch (m_phase) {
case Phase::Idle: {
String line;
if (!readLine(line))
return Process::Suspend;
if (!parseFirstLine(WTFMove(line)))
return abortProcess("Client error: invalid request line.");
ASSERT(!m_message.method.isEmpty());
ASSERT(!m_message.path.isEmpty());
ASSERT(!m_message.version.isEmpty());
m_phase = Phase::Header;
return Process::Continue;
}
case Phase::Header: {
String line;
if (!readLine(line))
return Process::Suspend;
if (!line.isEmpty())
m_message.requestHeaders.append(WTFMove(line));
else {
m_bodyLength = expectedBodyLength();
m_phase = Phase::Body;
}
return Process::Continue;
}
case Phase::Body:
if (m_buffer.size() > m_bodyLength)
return abortProcess("Client error: don't send data after request and before response.");
if (m_buffer.size() < m_bodyLength)
return Process::Suspend;
m_message.requestBody = WTFMove(m_buffer);
m_phase = Phase::Complete;
return Process::Suspend;
case Phase::Complete:
return abortProcess("Client error: don't send data after request and before response.");
case Phase::Error:
return abortProcess();
}
}
HTTPParser::Process HTTPParser::abortProcess(const char* message)
{
if (message)
LOG_ERROR(message);
m_phase = Phase::Error;
if (!m_buffer.isEmpty())
m_buffer.resize(0);
return Process::Suspend;
}
bool HTTPParser::parseFirstLine(String&& line)
{
auto components = line.split(' ');
if (components.size() != 3)
return false;
m_message.method = WTFMove(components[0]);
m_message.path = WTFMove(components[1]);
m_message.version = WTFMove(components[2]);
return true;
}
bool HTTPParser::readLine(String& line)
{
auto length = m_buffer.size();
auto position = m_buffer.find(0x0d);
if (position == notFound || position + 1 == length || m_buffer[position + 1] != 0x0a)
return false;
line = String::fromUTF8(m_buffer.data(), position);
if (line.isNull())
LOG_ERROR("Client error: invalid encoding in HTTP header.");
m_buffer.remove(0, position + 2);
return true;
}
size_t HTTPParser::expectedBodyLength() const
{
if (m_message.method == "HEAD"_s)
return 0;
constexpr auto name = "content-length:"_s;
const size_t nameLength = name.length();
for (const auto& header : m_message.requestHeaders) {
if (header.startsWithIgnoringASCIICase(name))
return parseIntegerAllowingTrailingJunk<size_t>(StringView { header }.substring(nameLength)).value_or(0);
}
return 0;
}
} // namespace WebDriver