libreoffice-online/loolwsd/MasterProcessSession.cpp
Tor Lillqvist 5782e0b04c TileCache::lookupTile() already returns non-null only if the stream is open
No need to test at call sites. We can assert() as a sanity check
though.
2016-04-15 14:12:35 +03:00

779 lines
26 KiB
C++

/* -*- 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 <Poco/FileStream.h>
#include <Poco/JSON/Object.h>
#include <Poco/JSON/Parser.h>
#include <Poco/URI.h>
#include <Poco/URIStreamOpener.h>
#include "Common.hpp"
#include "LOOLProtocol.hpp"
#include "LOOLSession.hpp"
#include "LOOLWSD.hpp"
#include "MasterProcessSession.hpp"
#include "Rectangle.hpp"
#include "Storage.hpp"
#include "TileCache.hpp"
#include "IoUtil.hpp"
#include "Util.hpp"
using namespace LOOLProtocol;
using Poco::Path;
using Poco::StringTokenizer;
MasterProcessSession::MasterProcessSession(const std::string& id,
const Kind kind,
std::shared_ptr<Poco::Net::WebSocket> ws,
std::shared_ptr<DocumentBroker> docBroker,
std::shared_ptr<BasicTileQueue> queue) :
LOOLSession(id, kind, ws),
_curPart(0),
_loadPart(-1),
_docBroker(docBroker),
_queue(queue)
{
Log::info("MasterProcessSession ctor [" + getName() + "].");
}
MasterProcessSession::~MasterProcessSession()
{
Log::info("~MasterProcessSession dtor [" + getName() + "].");
try
{
// We could be unwinding because our peer's connection
// died. Handle I/O errors in that case.
disconnect();
}
catch (const std::exception& exc)
{
Log::error(std::string("MasterProcessSession::~MasterProcessSession: Exception: ") + exc.what());
}
}
void MasterProcessSession::disconnect()
{
if (!isDisconnected())
{
LOOLSession::disconnect();
// Release the save-as queue.
_saveAsQueue.put("");
auto peer = _peer.lock();
if (peer)
{
peer->disconnect();
}
}
}
bool MasterProcessSession::handleDisconnect()
{
Log::info("Graceful disconnect on " + getName() + ".");
LOOLSession::handleDisconnect();
auto peer = _peer.lock();
if (peer)
peer->disconnect();
return false;
}
bool MasterProcessSession::_handleInput(const char *buffer, int length)
{
const std::string firstLine = getFirstLine(buffer, length);
StringTokenizer tokens(firstLine, " ", StringTokenizer::TOK_IGNORE_EMPTY | StringTokenizer::TOK_TRIM);
Log::trace(getName() + ": handling [" + firstLine + "].");
if (LOOLProtocol::tokenIndicatesUserInteraction(tokens[0]))
{
// Keep track of timestamps of incoming client messages that indicate user activity.
updateLastActivityTime();
}
if (tokens[0] == "loolclient")
{
const auto versionTuple = ParseVersion(tokens[1]);
if (std::get<0>(versionTuple) != ProtocolMajorVersionNumber ||
std::get<1>(versionTuple) != ProtocolMinorVersionNumber)
{
sendTextFrame("error: cmd=loolclient kind=badversion");
return false;
}
sendTextFrame("loolserver " + GetProtocolVersion());
return true;
}
if (_kind == Kind::ToPrisoner)
{
// Note that this handles both forwarding requests from the client to the child process, and
// forwarding replies from the child process to the client. Or does it?
// Snoop at some messages and manipulate tile cache information as needed
auto peer = _peer.lock();
{
if (!peer)
{
LOOLSession::disconnect();
return false;
}
if (tokens[0] == "unocommandresult:")
{
const std::string stringMsg(buffer, length);
Log::info(getName() + "Command: " + stringMsg);
const auto index = stringMsg.find_first_of('{');
if (index != std::string::npos)
{
const std::string stringJSON = stringMsg.substr(index);
Poco::JSON::Parser parser;
const auto result = parser.parse(stringJSON);
const auto& object = result.extract<Poco::JSON::Object::Ptr>();
if (object->get("commandName").toString() == ".uno:Save" &&
object->get("success").toString() == "true")
{
_docBroker->save();
return true;
}
}
}
if (tokens[0] == "error:")
{
std::string errorCommand;
std::string errorKind;
if (getTokenString(tokens[1], "cmd", errorCommand) &&
getTokenString(tokens[2], "kind", errorKind) )
{
if (errorCommand == "load")
{
if (errorKind == "passwordrequired:to-view" ||
errorKind == "passwordrequired:to-modify" ||
errorKind == "wrongpassword")
{
forwardToPeer(buffer, length);
peer->_bLoadError = true;
return false;
}
}
}
}
if (tokens[0] == "curpart:" &&
tokens.count() == 2 &&
getTokenInteger(tokens[1], "part", _curPart))
{
return true;
}
if (tokens.count() == 2 && tokens[0] == "saveas:")
{
std::string url;
if (!getTokenString(tokens[1], "url", url))
return true;
if (peer)
{
// Save as completed, inform the other (Kind::ToClient)
// MasterProcessSession about it.
const std::string filePrefix("file:///");
if (url.find(filePrefix) == 0)
{
// Rewrite file:// URLs, as they are visible to the outside world.
const Path path(_docBroker->getJailRoot(), url.substr(filePrefix.length()));
url = filePrefix + path.toString().substr(1);
}
peer->_saveAsQueue.put(url);
}
return true;
}
}
if (peer && !_isDocPasswordProtected)
{
if (tokens[0] == "tile:")
{
int part, width, height, tilePosX, tilePosY, tileWidth, tileHeight;
if (tokens.count() < 8 ||
!getTokenInteger(tokens[1], "part", part) ||
!getTokenInteger(tokens[2], "width", width) ||
!getTokenInteger(tokens[3], "height", height) ||
!getTokenInteger(tokens[4], "tileposx", tilePosX) ||
!getTokenInteger(tokens[5], "tileposy", tilePosY) ||
!getTokenInteger(tokens[6], "tilewidth", tileWidth) ||
!getTokenInteger(tokens[7], "tileheight", tileHeight))
assert(false);
assert(firstLine.size() < static_cast<std::string::size_type>(length));
_docBroker->tileCache().saveTile(part, width, height, tilePosX, tilePosY, tileWidth, tileHeight, buffer + firstLine.size() + 1, length - firstLine.size() - 1);
}
else if (tokens[0] == "status:")
{
_docBroker->tileCache().saveTextFile(std::string(buffer, length), "status.txt");
// let clients know if they hold the edit lock
std::string message = "editlock: ";
message += std::to_string(peer->isEditLocked());
forwardToPeer(message.c_str(), message.size());
}
else if (tokens[0] == "commandvalues:")
{
const std::string stringMsg(buffer, length);
const auto index = stringMsg.find_first_of('{');
if (index != std::string::npos)
{
const std::string stringJSON = stringMsg.substr(index);
Poco::JSON::Parser parser;
const auto result = parser.parse(stringJSON);
const auto& object = result.extract<Poco::JSON::Object::Ptr>();
const std::string commandName = object->get("commandName").toString();
if (commandName.find(".uno:CharFontName") != std::string::npos ||
commandName.find(".uno:StyleApply") != std::string::npos)
{
// other commands should not be cached
_docBroker->tileCache().saveTextFile(stringMsg, "cmdValues" + commandName + ".txt");
}
}
}
else if (tokens[0] == "partpagerectangles:")
{
if (tokens.count() > 1 && !tokens[1].empty())
_docBroker->tileCache().saveTextFile(std::string(buffer, length), "partpagerectangles.txt");
}
else if (tokens[0] == "invalidatecursor:")
{
_docBroker->tileCache().setEditing(true);
}
else if (tokens[0] == "invalidatetiles:")
{
// FIXME temporarily, set the editing on the 1st invalidate, TODO extend
// the protocol so that the client can set the editing or view only.
_docBroker->tileCache().setEditing(true);
assert(firstLine.size() == static_cast<std::string::size_type>(length));
_docBroker->tileCache().invalidateTiles(firstLine);
}
else if (tokens[0] == "renderfont:")
{
std::string font;
if (tokens.count() < 2 ||
!getTokenString(tokens[1], "font", font))
assert(false);
assert(firstLine.size() < static_cast<std::string::size_type>(length));
_docBroker->tileCache().saveRendering(font, "font", buffer + firstLine.size() + 1, length - firstLine.size() - 1);
}
}
forwardToPeer(buffer, length);
return true;
}
if (_kind == Kind::ToPrisoner)
{
// Message from child process to be forwarded to client.
// I think we should never get here
Log::error(getName() + ": Unexpected request [" + tokens[0] + "].");
assert(false);
}
else if (tokens[0] == "takeedit")
{
_docBroker->takeEditLock(getId());
return true;
}
else if (tokens[0] == "load")
{
if (_docURL != "")
{
sendTextFrame("error: cmd=load kind=docalreadyloaded");
return false;
}
return loadDocument(buffer, length, tokens);
}
else if (tokens[0] != "canceltiles" &&
tokens[0] != "clientzoom" &&
tokens[0] != "clientvisiblearea" &&
tokens[0] != "commandvalues" &&
tokens[0] != "downloadas" &&
tokens[0] != "getchildid" &&
tokens[0] != "gettextselection" &&
tokens[0] != "paste" &&
tokens[0] != "insertfile" &&
tokens[0] != "invalidatetiles" &&
tokens[0] != "key" &&
tokens[0] != "mouse" &&
tokens[0] != "partpagerectangles" &&
tokens[0] != "renderfont" &&
tokens[0] != "requestloksession" &&
tokens[0] != "resetselection" &&
tokens[0] != "saveas" &&
tokens[0] != "selectgraphic" &&
tokens[0] != "selecttext" &&
tokens[0] != "setclientpart" &&
tokens[0] != "setpage" &&
tokens[0] != "status" &&
tokens[0] != "tile" &&
tokens[0] != "tilecombine" &&
tokens[0] != "unload" &&
tokens[0] != "uno")
{
sendTextFrame("error: cmd=" + tokens[0] + " kind=unknown");
return false;
}
else if (_docURL == "")
{
sendTextFrame("error: cmd=" + tokens[0] + " kind=nodocloaded");
return false;
}
else if (tokens[0] == "canceltiles")
{
if (!_peer.expired())
forwardToPeer(buffer, length);
}
else if (tokens[0] == "commandvalues")
{
return getCommandValues(buffer, length, tokens);
}
else if (tokens[0] == "partpagerectangles")
{
return getPartPageRectangles(buffer, length);
}
else if (tokens[0] == "invalidatetiles")
{
return invalidateTiles(buffer, length, tokens);
}
else if (tokens[0] == "renderfont")
{
sendFontRendering(buffer, length, tokens);
}
else if (tokens[0] == "status")
{
return getStatus(buffer, length);
}
else if (tokens[0] == "tile")
{
sendTile(buffer, length, tokens);
}
else if (tokens[0] == "tilecombine")
{
sendCombinedTiles(buffer, length, tokens);
}
else
{
// All other commands are such that they always require a
// LibreOfficeKitDocument session, i.e. need to be handled in
// a child process.
if (_peer.expired())
{
Log::trace("Dispatching child to handle [" + tokens[0] + "].");
dispatchChild();
}
if (tokens[0] == "setclientpart")
{
_docBroker->tileCache().removeFile("status.txt");
}
// Allow 'downloadas' for all kinds of views irrespective of editlock
if (_kind == Kind::ToClient && !isEditLocked() && tokens[0] != "downloadas")
{
std::string dummyFrame = "dummymsg";
forwardToPeer(dummyFrame.c_str(), dummyFrame.size());
}
else if (tokens[0] != "requestloksession")
{
forwardToPeer(buffer, length);
}
}
return true;
}
bool MasterProcessSession::invalidateTiles(const char* /*buffer*/, int /*length*/, StringTokenizer& tokens)
{
int part, tilePosX, tilePosY, tileWidth, tileHeight;
if (tokens.count() != 6 ||
!getTokenInteger(tokens[1], "part", part) ||
!getTokenInteger(tokens[2], "tileposx", tilePosX) ||
!getTokenInteger(tokens[3], "tileposy", tilePosY) ||
!getTokenInteger(tokens[4], "tilewidth", tileWidth) ||
!getTokenInteger(tokens[5], "tileheight", tileHeight))
{
sendTextFrame("error: cmd=invalidatetiles kind=syntax");
return false;
}
// FIXME temporarily, set the editing on the 1st invalidate, TODO extend
// the protocol so that the client can set the editing or view only.
_docBroker->tileCache().setEditing(true);
_docBroker->tileCache().invalidateTiles(_curPart, tilePosX, tilePosY, tileWidth, tileHeight);
return true;
}
bool MasterProcessSession::loadDocument(const char* /*buffer*/, int /*length*/, StringTokenizer& tokens)
{
if (tokens.count() < 2)
{
sendTextFrame("error: cmd=load kind=syntax");
return false;
}
try
{
std::string timestamp;
parseDocOptions(tokens, _loadPart, timestamp);
// Finally, wait for the Child to connect to Master,
// link the document in jail and dispatch load to child.
Log::trace("Dispatching child to handle [load].");
dispatchChild();
return true;
}
catch (const Poco::SyntaxException&)
{
sendTextFrame("error: cmd=load kind=uriinvalid");
}
return false;
}
bool MasterProcessSession::getStatus(const char *buffer, int length)
{
const std::string status = _docBroker->tileCache().getTextFile("status.txt");
if (status.size() > 0)
{
sendTextFrame(status);
// let clients know if they hold the edit lock
std::string message = "editlock: ";
message += std::to_string(isEditLocked());
sendTextFrame(message);
return true;
}
if (_peer.expired())
{
Log::trace("Dispatching child to handle [getStatus].");
dispatchChild();
}
forwardToPeer(buffer, length);
return true;
}
bool MasterProcessSession::getCommandValues(const char *buffer, int length, StringTokenizer& tokens)
{
std::string command;
if (tokens.count() != 2 || !getTokenString(tokens[1], "command", command))
{
sendTextFrame("error: cmd=commandvalues kind=syntax");
return false;
}
const std::string cmdValues = _docBroker->tileCache().getTextFile("cmdValues" + command + ".txt");
if (cmdValues.size() > 0)
{
sendTextFrame(cmdValues);
return true;
}
if (_peer.expired())
dispatchChild();
forwardToPeer(buffer, length);
return true;
}
bool MasterProcessSession::getPartPageRectangles(const char *buffer, int length)
{
const std::string partPageRectangles = _docBroker->tileCache().getTextFile("partpagerectangles.txt");
if (partPageRectangles.size() > 0)
{
sendTextFrame(partPageRectangles);
return true;
}
if (_peer.expired())
dispatchChild();
forwardToPeer(buffer, length);
return true;
}
std::string MasterProcessSession::getSaveAs()
{
const auto payload = _saveAsQueue.get();
return std::string(payload.data(), payload.size());
}
void MasterProcessSession::sendFontRendering(const char *buffer, int length, StringTokenizer& tokens)
{
std::string font;
if (tokens.count() < 2 ||
!getTokenString(tokens[1], "font", font))
{
sendTextFrame("error: cmd=renderfont kind=syntax");
return;
}
const std::string response = "renderfont: " + Poco::cat(std::string(" "), tokens.begin() + 1, tokens.end()) + "\n";
std::vector<char> output;
output.resize(response.size());
std::memcpy(output.data(), response.data(), response.size());
std::unique_ptr<std::fstream> cachedRendering = _docBroker->tileCache().lookupRendering(font, "font");
if (cachedRendering && cachedRendering->is_open())
{
cachedRendering->seekg(0, std::ios_base::end);
size_t pos = output.size();
std::streamsize size = cachedRendering->tellg();
output.resize(pos + size);
cachedRendering->seekg(0, std::ios_base::beg);
cachedRendering->read(output.data() + pos, size);
cachedRendering->close();
sendBinaryFrame(output.data(), output.size());
return;
}
if (_peer.expired())
dispatchChild();
forwardToPeer(buffer, length);
}
void MasterProcessSession::sendTile(const char *buffer, int length, StringTokenizer& tokens)
{
int part, width, height, tilePosX, tilePosY, tileWidth, tileHeight;
if (tokens.count() < 8 ||
!getTokenInteger(tokens[1], "part", part) ||
!getTokenInteger(tokens[2], "width", width) ||
!getTokenInteger(tokens[3], "height", height) ||
!getTokenInteger(tokens[4], "tileposx", tilePosX) ||
!getTokenInteger(tokens[5], "tileposy", tilePosY) ||
!getTokenInteger(tokens[6], "tilewidth", tileWidth) ||
!getTokenInteger(tokens[7], "tileheight", tileHeight))
{
sendTextFrame("error: cmd=tile kind=syntax");
return;
}
if (part < 0 ||
width <= 0 ||
height <= 0 ||
tilePosX < 0 ||
tilePosY < 0 ||
tileWidth <= 0 ||
tileHeight <= 0)
{
sendTextFrame("error: cmd=tile kind=invalid");
return;
}
const std::string response = "tile: " + Poco::cat(std::string(" "), tokens.begin() + 1, tokens.end()) + "\n";
std::vector<char> output;
output.reserve(4 * width * height);
output.resize(response.size());
std::memcpy(output.data(), response.data(), response.size());
std::unique_ptr<std::fstream> cachedTile = _docBroker->tileCache().lookupTile(part, width, height, tilePosX, tilePosY, tileWidth, tileHeight);
if (cachedTile)
{
assert(cachedTile->is_open());
cachedTile->seekg(0, std::ios_base::end);
size_t pos = output.size();
std::streamsize size = cachedTile->tellg();
output.resize(pos + size);
cachedTile->seekg(0, std::ios_base::beg);
cachedTile->read(output.data() + pos, size);
cachedTile->close();
sendBinaryFrame(output.data(), output.size());
return;
}
if (_peer.expired())
dispatchChild();
forwardToPeer(buffer, length);
}
void MasterProcessSession::sendCombinedTiles(const char* /*buffer*/, int /*length*/, StringTokenizer& tokens)
{
int part, pixelWidth, pixelHeight, tileWidth, tileHeight;
std::string tilePositionsX, tilePositionsY;
if (tokens.count() < 8 ||
!getTokenInteger(tokens[1], "part", part) ||
!getTokenInteger(tokens[2], "width", pixelWidth) ||
!getTokenInteger(tokens[3], "height", pixelHeight) ||
!getTokenString (tokens[4], "tileposx", tilePositionsX) ||
!getTokenString (tokens[5], "tileposy", tilePositionsY) ||
!getTokenInteger(tokens[6], "tilewidth", tileWidth) ||
!getTokenInteger(tokens[7], "tileheight", tileHeight))
{
sendTextFrame("error: cmd=tilecombine kind=syntax");
return;
}
if (part < 0 || pixelWidth <= 0 || pixelHeight <= 0 ||
tileWidth <= 0 || tileHeight <= 0 ||
tilePositionsX.empty() || tilePositionsY.empty())
{
sendTextFrame("error: cmd=tilecombine kind=invalid");
return;
}
std::string reqTimestamp;
if (tokens.count() > 8)
getTokenString(tokens[8], "timestamp", reqTimestamp);
StringTokenizer positionXtokens(tilePositionsX, ",", StringTokenizer::TOK_IGNORE_EMPTY | StringTokenizer::TOK_TRIM);
StringTokenizer positionYtokens(tilePositionsY, ",", StringTokenizer::TOK_IGNORE_EMPTY | StringTokenizer::TOK_TRIM);
size_t numberOfPositions = positionYtokens.count();
// check that number of positions for X and Y is the same
if (numberOfPositions != positionXtokens.count())
{
sendTextFrame("error: cmd=tilecombine kind=invalid");
return;
}
std::string forwardTileX;
std::string forwardTileY;
for (size_t i = 0; i < numberOfPositions; ++i)
{
int x = 0;
if (!stringToInteger(positionXtokens[i], x))
{
sendTextFrame("error: cmd=tilecombine kind=syntax");
return;
}
int y = 0;
if (!stringToInteger(positionYtokens[i], y))
{
sendTextFrame("error: cmd=tilecombine kind=syntax");
return;
}
std::unique_ptr<std::fstream> cachedTile = _docBroker->tileCache().lookupTile(part, pixelWidth, pixelHeight, x, y, tileWidth, tileHeight);
if (cachedTile)
{
assert(cachedTile->is_open());
std::ostringstream oss;
oss << "tile: part=" << part
<< " width=" << pixelWidth
<< " height=" << pixelHeight
<< " tileposx=" << x
<< " tileposy=" << y
<< " tilewidth=" << tileWidth
<< " tileheight=" << tileHeight;
if (!reqTimestamp.empty())
{
oss << " timestamp=" << reqTimestamp;
}
oss << "\n";
const std::string response = oss.str();
std::vector<char> output;
output.reserve(4 * pixelWidth * pixelHeight);
output.resize(response.size());
std::memcpy(output.data(), response.data(), response.size());
cachedTile->seekg(0, std::ios_base::end);
const size_t pos = output.size();
const std::streamsize size = cachedTile->tellg();
output.resize(pos + size);
cachedTile->seekg(0, std::ios_base::beg);
cachedTile->read(output.data() + pos, size);
cachedTile->close();
sendBinaryFrame(output.data(), output.size());
}
else
{
if (!forwardTileX.empty())
forwardTileX += ",";
forwardTileX += std::to_string(x);
if (!forwardTileY.empty())
forwardTileY += ",";
forwardTileY += std::to_string(y);
}
}
if (forwardTileX.empty() && forwardTileY.empty())
return;
if (_peer.expired())
dispatchChild();
std::string forward = "tilecombine part=" + std::to_string(part) +
" width=" + std::to_string(pixelWidth) +
" height=" + std::to_string(pixelHeight) +
" tileposx=" + forwardTileX +
" tileposy=" + forwardTileY +
" tilewidth=" + std::to_string(tileWidth) +
" tileheight=" + std::to_string(tileHeight);
if (!reqTimestamp.empty())
forward += " timestamp=" + reqTimestamp;
forwardToPeer(forward.c_str(), forward.size());
}
void MasterProcessSession::dispatchChild()
{
std::ostringstream oss;
oss << "load";
oss << " url=" << _docBroker->getPublicUri().toString();
oss << " jail=" << _docBroker->getJailedUri().toString();
if (_loadPart >= 0)
oss << " part=" + std::to_string(_loadPart);
if (_isDocPasswordProvided)
oss << " password=" << _docPassword;
if (!_docOptions.empty())
oss << " options=" << _docOptions;
const auto loadRequest = oss.str();
forwardToPeer(loadRequest.c_str(), loadRequest.size());
}
void MasterProcessSession::forwardToPeer(const char *buffer, int length)
{
const auto message = getAbbreviatedMessage(buffer, length);
Log::trace(getName() + " Forward: " + message);
auto peer = _peer.lock();
if (!peer)
{
Log::error(getName() + ": no peer to forward to.");
return;
}
peer->sendBinaryFrame(buffer, length);
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */