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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include "config.h"
#include <stdio.h>
#include <ctype.h>
#include <iomanip>
#include <Poco/DateTime.h>
#include <Poco/DateTimeFormat.h>
#include <Poco/DateTimeFormatter.h>
#include "SigUtil.hpp"
#include "Socket.hpp"
#include "ServerSocket.hpp"
#include "WebSocketHandler.hpp"
int SocketPoll::DefaultPollTimeoutMs = 5000;
// help with initialization order
namespace {
std::vector<int> &getWakeupsArray()
{
static std::vector<int> pollWakeups;
return pollWakeups;
}
std::mutex &getPollWakeupsMutex()
{
static std::mutex pollWakeupsMutex;
return pollWakeupsMutex;
}
}
SocketPoll::SocketPoll(const std::string& threadName)
: _name(threadName),
_stop(false),
_threadStarted(false),
_threadFinished(false)
{
// Create the wakeup fd.
if (::pipe2(_wakeup, O_CLOEXEC | O_NONBLOCK) == -1)
{
throw std::runtime_error("Failed to allocate pipe for SocketPoll [" + threadName + "] waking.");
}
{
std::lock_guard<std::mutex> lock(getPollWakeupsMutex());
getWakeupsArray().push_back(_wakeup[1]);
}
_owner = std::this_thread::get_id();
}
SocketPoll::~SocketPoll()
{
stop();
if (_threadStarted && _thread.joinable())
{
if (_thread.get_id() == std::this_thread::get_id())
LOG_ERR("DEADLOCK PREVENTED: joining own thread!");
else
_thread.join();
}
{
std::lock_guard<std::mutex> lock(getPollWakeupsMutex());
auto it = std::find(getWakeupsArray().begin(),
getWakeupsArray().end(),
_wakeup[1]);
if (it != getWakeupsArray().end())
getWakeupsArray().erase(it);
}
::close(_wakeup[0]);
::close(_wakeup[1]);
_wakeup[0] = -1;
_wakeup[1] = -1;
}
void SocketPoll::startThread()
{
if (!_threadStarted)
{
_threadStarted = true;
try
{
_thread = std::thread(&SocketPoll::pollingThreadEntry, this);
_owner = _thread.get_id();
}
catch (const std::exception& exc)
{
LOG_ERR("Failed to start poll thread: " << exc.what());
_threadStarted = false;
}
}
}
void SocketPoll::wakeupWorld()
{
for (const auto& fd : getWakeupsArray())
wakeup(fd);
}
void ServerSocket::dumpState(std::ostream& os)
{
os << "\t" << getFD() << "\t<accept>\n";
}
namespace {
void dump_hex (const char *legend, const char *prefix, std::vector<char> buffer)
{
unsigned int i, j;
fprintf (stderr, "%s", legend);
for (j = 0; j < buffer.size() + 15; j += 16)
{
fprintf (stderr, "%s0x%.4x ", prefix, j);
for (i = 0; i < 16; i++)
{
if ((j + i) < buffer.size())
fprintf (stderr, "%.2x ", (unsigned char)buffer[j+i]);
else
fprintf (stderr, " ");
if (i == 8)
fprintf (stderr, " ");
}
fprintf (stderr, " | ");
for (i = 0; i < 16; i++)
if ((j + i) < buffer.size() && ::isprint(buffer[j+i]))
fprintf (stderr, "%c", buffer[j+i]);
else
fprintf (stderr, ".");
fprintf (stderr, "\n");
}
}
} // namespace
void WebSocketHandler::dumpState(std::ostream& os)
{
os << (_shuttingDown ? "shutd " : "alive ")
<< std::setw(5) << 1.0*_pingTimeUs/1000 << "ms ";
if (_wsPayload.size() > 0)
dump_hex("\t\tws queued payload:\n", "\t\t", _wsPayload);
}
void StreamSocket::dumpState(std::ostream& os)
{
int timeoutMaxMs = SocketPoll::DefaultPollTimeoutMs;
int events = getPollEvents(std::chrono::steady_clock::now(), timeoutMaxMs);
os << "\t" << getFD() << "\t" << events << "\t"
<< _inBuffer.size() << "\t" << _outBuffer.size() << "\t";
_socketHandler->dumpState(os);
if (_inBuffer.size() > 0)
dump_hex("\t\tinBuffer:\n", "\t\t", _inBuffer);
if (_outBuffer.size() > 0)
dump_hex("\t\toutBuffer:\n", "\t\t", _inBuffer);
}
void SocketPoll::dumpState(std::ostream& os)
{
// FIXME: NOT thread-safe! _pollSockets is modified from the polling thread!
os << " Poll [" << _pollSockets.size() << "] - wakeup r: "
<< _wakeup[0] << " w: " << _wakeup[1] << "\n";
if (_newCallbacks.size() > 0)
os << "\tcallbacks: " << _newCallbacks.size() << "\n";
os << "\tfd\tevents\trsize\twsize\n";
for (auto &i : _pollSockets)
i->dumpState(os);
}
namespace HttpHelper
{
void sendFile(const std::shared_ptr<StreamSocket>& socket, const std::string& path,
Poco::Net::HTTPResponse& response, bool noCache)
{
struct stat st;
if (stat(path.c_str(), &st) != 0)
{
LOG_WRN("#" << socket->getFD() << ": Failed to stat [" << path << "]. File will not be sent.");
throw Poco::FileNotFoundException("Failed to stat [" + path + "]. File will not be sent.");
return;
}
int bufferSize = std::min(st.st_size, (off_t)Socket::MaximumSendBufferSize);
if (st.st_size >= socket->getSendBufferSize())
{
socket->setSocketBufferSize(bufferSize);
bufferSize = socket->getSendBufferSize();
}
response.setContentLength(st.st_size);
response.set("User-Agent", HTTP_AGENT_STRING);
response.set("Date", Poco::DateTimeFormatter::format(Poco::Timestamp(), Poco::DateTimeFormat::HTTP_FORMAT));
if (!noCache)
{
// 60 * 60 * 24 * 128 (days) = 11059200
response.set("Cache-Control", "max-age=11059200");
response.set("ETag", "\"" LOOLWSD_VERSION_HASH "\"");
}
std::ostringstream oss;
response.write(oss);
const std::string header = oss.str();
LOG_TRC("#" << socket->getFD() << ": Sending file [" << path << "]: " << header);
socket->send(header);
std::ifstream file(path, std::ios::binary);
bool flush = true;
do
{
char buf[bufferSize];
file.read(buf, sizeof(buf));
const int size = file.gcount();
if (size > 0)
socket->send(buf, size, flush);
else
break;
flush = false;
}
while (file);
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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