158 lines
4.5 KiB
C++
158 lines
4.5 KiB
C++
/*
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* Copyright (C) 2020 Sony Interactive Entertainment Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "HTTPParser.h"
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#include <wtf/text/StringToIntegerConversion.h>
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namespace WebDriver {
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HTTPParser::Phase HTTPParser::parse(Vector<uint8_t>&& data)
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{
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if (!data.isEmpty()) {
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m_buffer.appendVector(WTFMove(data));
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while (true) {
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if (handlePhase() == Process::Suspend)
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break;
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}
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}
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return m_phase;
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}
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HTTPParser::Process HTTPParser::handlePhase()
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{
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switch (m_phase) {
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case Phase::Idle: {
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String line;
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if (!readLine(line))
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return Process::Suspend;
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if (!parseFirstLine(WTFMove(line)))
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return abortProcess("Client error: invalid request line.");
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ASSERT(!m_message.method.isEmpty());
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ASSERT(!m_message.path.isEmpty());
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ASSERT(!m_message.version.isEmpty());
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m_phase = Phase::Header;
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return Process::Continue;
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}
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case Phase::Header: {
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String line;
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if (!readLine(line))
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return Process::Suspend;
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if (!line.isEmpty())
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m_message.requestHeaders.append(WTFMove(line));
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else {
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m_bodyLength = expectedBodyLength();
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m_phase = Phase::Body;
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}
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return Process::Continue;
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}
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case Phase::Body:
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if (m_buffer.size() > m_bodyLength)
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return abortProcess("Client error: don't send data after request and before response.");
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if (m_buffer.size() < m_bodyLength)
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return Process::Suspend;
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m_message.requestBody = WTFMove(m_buffer);
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m_phase = Phase::Complete;
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return Process::Suspend;
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case Phase::Complete:
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return abortProcess("Client error: don't send data after request and before response.");
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case Phase::Error:
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return abortProcess();
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}
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}
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HTTPParser::Process HTTPParser::abortProcess(const char* message)
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{
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if (message)
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LOG_ERROR(message);
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m_phase = Phase::Error;
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if (!m_buffer.isEmpty())
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m_buffer.resize(0);
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return Process::Suspend;
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}
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bool HTTPParser::parseFirstLine(String&& line)
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{
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auto components = line.split(' ');
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if (components.size() != 3)
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return false;
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m_message.method = WTFMove(components[0]);
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m_message.path = WTFMove(components[1]);
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m_message.version = WTFMove(components[2]);
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return true;
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}
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bool HTTPParser::readLine(String& line)
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{
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auto length = m_buffer.size();
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auto position = m_buffer.find(0x0d);
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if (position == notFound || position + 1 == length || m_buffer[position + 1] != 0x0a)
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return false;
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line = String::fromUTF8(m_buffer.data(), position);
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if (line.isNull())
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LOG_ERROR("Client error: invalid encoding in HTTP header.");
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m_buffer.remove(0, position + 2);
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return true;
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}
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size_t HTTPParser::expectedBodyLength() const
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{
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if (m_message.method == "HEAD")
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return 0;
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const char* name = "content-length:";
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const size_t nameLength = std::strlen(name);
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for (const auto& header : m_message.requestHeaders) {
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if (header.startsWithIgnoringASCIICase(name))
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return parseIntegerAllowingTrailingJunk<size_t>(StringView { header }.substring(nameLength)).value_or(0);
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}
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return 0;
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}
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} // namespace WebDriver
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