327 lines
9.6 KiB
C++
327 lines
9.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#include "config.h"
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#include <stdio.h>
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#include <ctype.h>
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#include <iomanip>
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#include <zlib.h>
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#include <Poco/DateTime.h>
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#include <Poco/DateTimeFormat.h>
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#include <Poco/DateTimeFormatter.h>
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#include <Poco/Net/HTTPResponse.h>
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#include "SigUtil.hpp"
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#include "Socket.hpp"
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#include "ServerSocket.hpp"
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#include "WebSocketHandler.hpp"
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int SocketPoll::DefaultPollTimeoutMs = 5000;
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std::atomic<bool> SocketPoll::InhibitThreadChecks(false);
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std::atomic<bool> Socket::InhibitThreadChecks(false);
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// help with initialization order
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namespace {
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std::vector<int> &getWakeupsArray()
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{
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static std::vector<int> pollWakeups;
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return pollWakeups;
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}
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std::mutex &getPollWakeupsMutex()
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{
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static std::mutex pollWakeupsMutex;
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return pollWakeupsMutex;
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}
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}
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SocketPoll::SocketPoll(const std::string& threadName)
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: _name(threadName),
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_stop(false),
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_threadStarted(false),
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_threadFinished(false),
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_owner(std::this_thread::get_id())
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{
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// Create the wakeup fd.
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if (::pipe2(_wakeup, O_CLOEXEC | O_NONBLOCK) == -1)
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{
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throw std::runtime_error("Failed to allocate pipe for SocketPoll [" + threadName + "] waking.");
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}
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std::lock_guard<std::mutex> lock(getPollWakeupsMutex());
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getWakeupsArray().push_back(_wakeup[1]);
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}
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SocketPoll::~SocketPoll()
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{
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joinThread();
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{
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std::lock_guard<std::mutex> lock(getPollWakeupsMutex());
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auto it = std::find(getWakeupsArray().begin(),
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getWakeupsArray().end(),
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_wakeup[1]);
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if (it != getWakeupsArray().end())
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getWakeupsArray().erase(it);
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}
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::close(_wakeup[0]);
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::close(_wakeup[1]);
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_wakeup[0] = -1;
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_wakeup[1] = -1;
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}
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void SocketPoll::startThread()
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{
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if (!_threadStarted)
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{
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_threadStarted = true;
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try
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{
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_thread = std::thread(&SocketPoll::pollingThreadEntry, this);
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}
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catch (const std::exception& exc)
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{
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LOG_ERR("Failed to start poll thread: " << exc.what());
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_threadStarted = false;
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}
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}
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}
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void SocketPoll::joinThread()
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{
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addCallback([this](){ removeSockets(); });
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stop();
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if (_threadStarted && _thread.joinable())
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{
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if (_thread.get_id() == std::this_thread::get_id())
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LOG_ERR("DEADLOCK PREVENTED: joining own thread!");
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else
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{
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_thread.join();
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_threadStarted = false;
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}
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}
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}
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void SocketPoll::wakeupWorld()
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{
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for (const auto& fd : getWakeupsArray())
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wakeup(fd);
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}
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void ServerSocket::dumpState(std::ostream& os)
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{
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os << "\t" << getFD() << "\t<accept>\n";
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}
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void SocketDisposition::execute()
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{
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// We should have hard ownership of this socket.
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assert(_socket->getThreadOwner() == std::this_thread::get_id());
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if (_socketMove)
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{
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// Drop pretentions of ownership before _socketMove.
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_socket->setThreadOwner(std::thread::id(0));
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_socketMove(_socket);
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}
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_socketMove = nullptr;
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}
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namespace {
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void dump_hex (std::ostream &os, const char *legend, const char *prefix, std::vector<char> buffer)
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{
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unsigned int i, j;
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char scratch[64];
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os << legend;
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for (j = 0; j < buffer.size() + 15; j += 16)
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{
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sprintf (scratch, "%s0x%.4x ", prefix, j);
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os << scratch;
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for (i = 0; i < 16; i++)
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{
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if ((j + i) < buffer.size())
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sprintf (scratch, "%.2x ", (unsigned char)buffer[j+i]);
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else
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sprintf (scratch, " ");
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os << scratch;
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if (i == 8)
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os << " ";
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}
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os << " | ";
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for (i = 0; i < 16; i++)
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{
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if ((j + i) < buffer.size() && ::isprint(buffer[j+i]))
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sprintf (scratch, "%c", buffer[j+i]);
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else
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sprintf (scratch, ".");
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os << scratch;
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}
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os << "\n";
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}
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}
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} // namespace
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void WebSocketHandler::dumpState(std::ostream& os)
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{
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os << (_shuttingDown ? "shutd " : "alive ")
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<< std::setw(5) << 1.0*_pingTimeUs/1000 << "ms ";
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if (_wsPayload.size() > 0)
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dump_hex(os, "\t\tws queued payload:\n", "\t\t", _wsPayload);
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os << "\n";
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}
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void StreamSocket::dumpState(std::ostream& os)
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{
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int timeoutMaxMs = SocketPoll::DefaultPollTimeoutMs;
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int events = getPollEvents(std::chrono::steady_clock::now(), timeoutMaxMs);
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os << "\t" << getFD() << "\t" << events << "\t"
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<< _inBuffer.size() << "\t" << _outBuffer.size() << "\t"
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<< " r: " << _bytesRecvd << "\t w: " << _bytesSent << "\t";
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_socketHandler->dumpState(os);
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if (_inBuffer.size() > 0)
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dump_hex(os, "\t\tinBuffer:\n", "\t\t", _inBuffer);
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if (_outBuffer.size() > 0)
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dump_hex(os, "\t\toutBuffer:\n", "\t\t", _inBuffer);
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}
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void StreamSocket::send(Poco::Net::HTTPResponse& response)
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{
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response.set("User-Agent", HTTP_AGENT_STRING);
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response.set("Date", Poco::DateTimeFormatter::format(Poco::Timestamp(), Poco::DateTimeFormat::HTTP_FORMAT));
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std::ostringstream oss;
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response.write(oss);
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send(oss.str());
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}
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void SocketPoll::dumpState(std::ostream& os)
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{
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// FIXME: NOT thread-safe! _pollSockets is modified from the polling thread!
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os << " Poll [" << _pollSockets.size() << "] - wakeup r: "
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<< _wakeup[0] << " w: " << _wakeup[1] << "\n";
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if (_newCallbacks.size() > 0)
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os << "\tcallbacks: " << _newCallbacks.size() << "\n";
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os << "\tfd\tevents\trsize\twsize\n";
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for (auto &i : _pollSockets)
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i->dumpState(os);
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}
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namespace HttpHelper
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{
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void sendUncompressedFileContent(const std::shared_ptr<StreamSocket>& socket,
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const std::string& path,
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const int bufferSize)
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{
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std::ifstream file(path, std::ios::binary);
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std::unique_ptr<char[]> buf(new char[bufferSize]);
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do
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{
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file.read(&buf[0], bufferSize);
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const int size = file.gcount();
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if (size > 0)
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socket->send(&buf[0], size, true);
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else
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break;
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}
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while (file);
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}
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void sendDeflatedFileContent(const std::shared_ptr<StreamSocket>& socket,
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const std::string& path,
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const int fileSize)
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{
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// FIXME: Should compress once ahead of time
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// compression of bundle.js takes significant time:
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// 200's ms for level 9 (468k), 72ms for level 1(587k)
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// down from 2Mb.
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if (fileSize > 0)
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{
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std::ifstream file(path, std::ios::binary);
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std::unique_ptr<char[]> buf(new char[fileSize]);
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file.read(&buf[0], fileSize);
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static const unsigned int Level = 1;
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const long unsigned int size = file.gcount();
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long unsigned int compSize = compressBound(size);
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std::unique_ptr<char[]> cbuf(new char[compSize]);
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compress2((Bytef *)&cbuf[0], &compSize, (Bytef *)&buf[0], size, Level);
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if (size > 0)
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socket->send(&cbuf[0], compSize, true);
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}
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}
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void sendFile(const std::shared_ptr<StreamSocket>& socket,
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const std::string& path,
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const std::string& mediaType,
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Poco::Net::HTTPResponse& response,
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const bool noCache,
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const bool deflate,
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const bool headerOnly)
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{
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struct stat st;
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if (stat(path.c_str(), &st) != 0)
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{
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LOG_WRN("#" << socket->getFD() << ": Failed to stat [" << path << "]. File will not be sent.");
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throw Poco::FileNotFoundException("Failed to stat [" + path + "]. File will not be sent.");
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}
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if (!noCache)
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{
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// 60 * 60 * 24 * 128 (days) = 11059200
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response.set("Cache-Control", "max-age=11059200");
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response.set("ETag", "\"" LOOLWSD_VERSION_HASH "\"");
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}
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response.setContentType(mediaType);
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response.add("X-Content-Type-Options", "nosniff");
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int bufferSize = std::min(st.st_size, (off_t)Socket::MaximumSendBufferSize);
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if (st.st_size >= socket->getSendBufferSize())
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{
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socket->setSocketBufferSize(bufferSize);
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bufferSize = socket->getSendBufferSize();
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}
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// Disable deflate for now - until we can cache deflated data.
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// FIXME: IE/Edge doesn't work well with deflate, so check with
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// IE/Edge before enabling the deflate again
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if (!deflate || true)
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{
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response.setContentLength(st.st_size);
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LOG_TRC("#" << socket->getFD() << ": Sending " <<
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(headerOnly ? "header for " : "") << " file [" << path << "].");
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socket->send(response);
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if (!headerOnly)
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sendUncompressedFileContent(socket, path, bufferSize);
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}
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else
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{
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response.set("Content-Encoding", "deflate");
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LOG_TRC("#" << socket->getFD() << ": Sending " <<
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(headerOnly ? "header for " : "") << " file [" << path << "].");
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socket->send(response);
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if (!headerOnly)
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sendDeflatedFileContent(socket, path, st.st_size);
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}
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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