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libreoffice-online/kit/Kit.cpp
Michael Meeks b1124c05a8 Deltas should be pixel based, add debugging. 
Change-Id: I3b47b738ee71d015911e3d77b59b5f3cb34ecd75
2017-11-22 15:55:03 +00:00

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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/.
*/
/*
* The main entry point for the LibreOfficeKit process serving
* a document editing session.
*/
#include "config.h"
#include <dlfcn.h>
#include <ftw.h>
#include <malloc.h>
#include <sys/capability.h>
#include <unistd.h>
#include <utime.h>
#include <sys/sysmacros.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <atomic>
#include <cassert>
#include <climits>
#include <condition_variable>
#include <cstdlib>
#include <iostream>
#include <memory>
#include <sstream>
#include <thread>
#define LOK_USE_UNSTABLE_API
#include <LibreOfficeKit/LibreOfficeKitInit.h>
#include <LibreOfficeKit/LibreOfficeKit.hxx>
#include <Poco/Exception.h>
#include <Poco/JSON/Object.h>
#include <Poco/JSON/Parser.h>
#include <Poco/Net/HTTPClientSession.h>
#include <Poco/Net/HTTPRequest.h>
#include <Poco/Net/HTTPResponse.h>
#include <Poco/Net/NetException.h>
#include <Poco/Net/Socket.h>
#include <Poco/Process.h>
#include <Poco/Runnable.h>
#include <Poco/StringTokenizer.h>
#include <Poco/Thread.h>
#include <Poco/URI.h>
#include <Poco/Util/Application.h>
#include "ChildSession.hpp"
#include "Common.hpp"
#include "IoUtil.hpp"
#include "KitHelper.hpp"
#include "Kit.hpp"
#include "Protocol.hpp"
#include "LOOLWebSocket.hpp"
#include "Log.hpp"
#include "Png.hpp"
#include "Rectangle.hpp"
#include "TileDesc.hpp"
#include "Unit.hpp"
#include "UserMessages.hpp"
#include "Util.hpp"
#include "common/SigUtil.hpp"
#include "common/Seccomp.hpp"
#ifdef FUZZER
#include <kit/DummyLibreOfficeKit.hpp>
#include <wsd/LOOLWSD.hpp>
#endif
#define LIB_SOFFICEAPP "lib" "sofficeapp" ".so"
#define LIB_MERGED "lib" "mergedlo" ".so"
using Poco::Exception;
using Poco::File;
using Poco::JSON::Array;
using Poco::JSON::Object;
using Poco::JSON::Parser;
using Poco::Net::WebSocket;
using Poco::Runnable;
using Poco::StringTokenizer;
using Poco::Thread;
using Poco::Timestamp;
using Poco::URI;
using Poco::Util::Application;
#ifndef BUILDING_TESTS
using Poco::Net::HTTPClientSession;
using Poco::Net::HTTPRequest;
using Poco::Net::HTTPResponse;
using Poco::Path;
using Poco::Process;
#endif
using namespace LOOLProtocol;
// We only host a single document in our lifetime.
class Document;
static std::shared_ptr<Document> document;
static LokHookFunction2* initFunction = nullptr;
#if ENABLE_DEBUG
# define ADD_DEBUG_RENDERID(s) ((s)+ " renderid=" + Util::UniqueId())
#else
# define ADD_DEBUG_RENDERID(s) (s)
#endif
namespace
{
#ifndef BUILDING_TESTS
enum class LinkOrCopyType { All, LO, NoUsr };
LinkOrCopyType linkOrCopyType;
std::string sourceForLinkOrCopy;
Path destinationForLinkOrCopy;
bool shouldCopyDir(const char *path)
{
switch (linkOrCopyType)
{
case LinkOrCopyType::NoUsr:
// bind mounted.
return strcmp(path,"usr") != 0;
case LinkOrCopyType::LO:
return
strcmp(path, "program/wizards") != 0 &&
strcmp(path, "sdk") != 0 &&
strcmp(path, "share/basic") != 0 &&
strcmp(path, "share/gallery") != 0 &&
strcmp(path, "share/Scripts") != 0 &&
strcmp(path, "share/template") != 0 &&
strcmp(path, "share/config/wizard") != 0 &&
strcmp(path, "share/config/wizard") != 0;
default: // LinkOrCopyType::All
return true;
}
}
int linkOrCopyFunction(const char *fpath,
const struct stat* /*sb*/,
int typeflag,
struct FTW* /*ftwbuf*/)
{
if (strcmp(fpath, sourceForLinkOrCopy.c_str()) == 0)
return 0;
assert(fpath[strlen(sourceForLinkOrCopy.c_str())] == '/');
const char *relativeOldPath = fpath + strlen(sourceForLinkOrCopy.c_str()) + 1;
Path newPath(destinationForLinkOrCopy, Path(relativeOldPath));
switch (typeflag)
{
case FTW_F:
case FTW_SLN:
File(newPath.parent()).createDirectories();
if (link(fpath, newPath.toString().c_str()) == -1)
{
LOG_SYS("link(\"" << fpath << "\", \"" <<
newPath.toString() << "\") failed. Will copy.");
try
{
File(fpath).copyTo(newPath.toString());
}
catch (const std::exception& exc)
{
LOG_ERR("Copying of '" << fpath << "' to " << newPath.toString() <<
" failed: " << exc.what() << ". Exiting.");
std::_Exit(Application::EXIT_SOFTWARE);
}
}
break;
case FTW_D:
{
struct stat st;
if (stat(fpath, &st) == -1)
{
LOG_SYS("stat(\"" << std::string(fpath) << "\") failed.");
return 1;
}
if (!shouldCopyDir(relativeOldPath))
{
LOG_TRC("skip redundant paths " << relativeOldPath);
return FTW_SKIP_SUBTREE;
}
File(newPath).createDirectories();
struct utimbuf ut;
ut.actime = st.st_atime;
ut.modtime = st.st_mtime;
if (utime(newPath.toString().c_str(), &ut) == -1)
{
LOG_SYS("utime(\"" << newPath.toString() << "\") failed.");
return 1;
}
}
break;
case FTW_DNR:
LOG_ERR("Cannot read directory '" << fpath << "'");
return 1;
case FTW_NS:
LOG_ERR("nftw: stat failed for '" << fpath << "'");
return 1;
default:
LOG_FTL("nftw: unexpected type: '" << typeflag);
assert(false);
break;
}
return 0;
}
void linkOrCopy(const std::string& source,
const Path& destination,
LinkOrCopyType type)
{
linkOrCopyType = type;
sourceForLinkOrCopy = source;
if (sourceForLinkOrCopy.back() == '/')
sourceForLinkOrCopy.pop_back();
destinationForLinkOrCopy = destination;
if (nftw(source.c_str(), linkOrCopyFunction, 10, FTW_ACTIONRETVAL) == -1)
{
LOG_ERR("linkOrCopy: nftw() failed for '" << source << "'");
}
}
void dropCapability(cap_value_t capability)
{
cap_t caps;
cap_value_t cap_list[] = { capability };
caps = cap_get_proc();
if (caps == nullptr)
{
LOG_SYS("cap_get_proc() failed.");
std::_Exit(1);
}
char *capText = cap_to_text(caps, nullptr);
LOG_TRC("Capabilities first: " << capText);
cap_free(capText);
if (cap_set_flag(caps, CAP_EFFECTIVE, sizeof(cap_list)/sizeof(cap_list[0]), cap_list, CAP_CLEAR) == -1 ||
cap_set_flag(caps, CAP_PERMITTED, sizeof(cap_list)/sizeof(cap_list[0]), cap_list, CAP_CLEAR) == -1)
{
LOG_SYS("cap_set_flag() failed.");
std::_Exit(1);
}
if (cap_set_proc(caps) == -1)
{
LOG_SYS("cap_set_proc() failed.");
std::_Exit(1);
}
capText = cap_to_text(caps, nullptr);
LOG_TRC("Capabilities now: " << capText);
cap_free(capText);
cap_free(caps);
}
void symlinkPathToJail(const Path& jailPath, const std::string &loTemplate,
const std::string &loSubPath)
{
Path symlinkSource(jailPath, Path(loTemplate.substr(1)));
File(symlinkSource.parent()).createDirectories();
std::string symlinkTarget;
for (auto i = 0; i < Path(loTemplate).depth(); i++)
symlinkTarget += "../";
symlinkTarget += loSubPath;
LOG_DBG("symlink(\"" << symlinkTarget << "\",\"" << symlinkSource.toString() << "\")");
if (symlink(symlinkTarget.c_str(), symlinkSource.toString().c_str()) == -1)
{
LOG_SYS("symlink(\"" << symlinkTarget << "\",\"" << symlinkSource.toString() << "\") failed");
throw Exception("symlink() failed");
}
}
#endif
}
/// A quick and dirty delta generator for last tile changes
struct DeltaGenerator {
struct DeltaData {
TileWireId _wid;
std::shared_ptr<std::vector<uint32_t>> _rawData;
};
std::vector<DeltaData> _deltaEntries;
bool makeDelta(
const DeltaData &prevData,
const DeltaData &curData,
std::vector<char>& output)
{
std::vector<uint32_t> &prev = *prevData._rawData.get();
std::vector<uint32_t> &cur = *curData._rawData.get();
// FIXME: should we split and compress alpha separately ?
if (prev.size() != cur.size())
{
LOG_ERR("mis-sized delta: " << prev.size() << " vs " << cur.size() << "bytes");
return false;
}
output.push_back('D');
LOG_TRC("building delta of " << prev.size() << "bytes");
// FIXME: really lame - some RLE might help etc.
for (size_t i = 0; i < prev.size();)
{
int sameCount = 0;
while (i + sameCount < prev.size() &&
prev[i+sameCount] == cur[i+sameCount])
{
++sameCount;
}
if (sameCount > 0)
{
#if 0
if (sameCount < 64)
output.push_back(sameCount);
else
#endif
{
output.push_back(0x80 | 0x00); // long-same
output.push_back(sameCount & 0xff);
output.push_back(sameCount >> 8);
}
i += sameCount;
LOG_TRC("identical " << sameCount << "pixels");
}
int diffCount = 0;
while (i + diffCount < prev.size() &&
(prev[i+diffCount] != cur[i+diffCount]))
{
++diffCount;
}
if (diffCount > 0)
{
#if 0
if (diffCount < 64)
output.push_back(0x40 & diffCount);
else
#endif
{
output.push_back(0x80 | 0x40); // long-diff
output.push_back(diffCount & 0xff);
output.push_back(diffCount >> 8);
}
output.insert(output.end(), (char *)&cur[i], (char *)&cur[i+diffCount]);
LOG_TRC("different " << diffCount << "pixels");
i += diffCount;
}
}
return true;
}
std::shared_ptr<std::vector<uint32_t>> dataToVector(
unsigned char* pixmap, size_t startX, size_t startY,
int width, int height,
int bufferWidth, int bufferHeight)
{
assert (startX + width <= (size_t)bufferWidth);
assert (startY + height <= (size_t)bufferHeight);
auto vector = std::make_shared<std::vector<uint32_t>>();
LOG_TRC("Converting data to vector of size "
<< (width * height * 4) << " width " << width
<< " height " << height);
vector->resize(width * height);
for (int y = 0; y < height; ++y)
{
size_t position = ((startY + y) * bufferWidth * 4) + (startX * 4);
memcpy(&(*vector)[y * width], pixmap + position, width * 4);
}
return vector;
}
// Creates a bespoke delta file-format ...
bool createDelta(
unsigned char* pixmap, size_t startX, size_t startY,
int width, int height,
int bufferWidth, int bufferHeight,
std::vector<char>& output,
TileWireId wid, TileWireId oldWid)
{
// First store a copy for later:
if (_deltaEntries.size() > 6) // FIXME: hard-coded ...
_deltaEntries.erase(_deltaEntries.begin());
// FIXME: assuming width etc. are all constant & so on.
DeltaData reference;
reference._wid = wid;
reference._rawData = dataToVector(pixmap, startX, startY, width, height,
bufferWidth, bufferHeight);
_deltaEntries.push_back(reference);
for (auto &it : _deltaEntries)
{
if (oldWid == it._wid)
return makeDelta(reference, it, output);
}
return false;
}
};
/// A quick & dirty cache of the last few PNGs
/// and their hashes to avoid re-compression
/// wherever possible.
class PngCache
{
typedef std::shared_ptr< std::vector< char > > CacheData;
struct CacheEntry {
size_t _hitCount;
TileWireId _wireId;
CacheData _data;
CacheEntry(size_t defaultSize, TileWireId id) :
_hitCount(1), // Every entry is used at least once; prevent removal at birth.
_wireId(id),
_data( new std::vector< char >() )
{
_data->reserve( defaultSize );
}
} ;
size_t _cacheSize;
static const size_t CacheSizeSoftLimit = (1024 * 4 * 32); // 128k of cache
static const size_t CacheSizeHardLimit = CacheSizeSoftLimit * 2;
size_t _cacheHits;
size_t _cacheTests;
TileWireId _nextId;
DeltaGenerator _deltaGen;
std::map< TileBinaryHash, CacheEntry > _cache;
std::map< TileWireId, TileBinaryHash > _wireToHash;
void clearCache(bool logStats = false)
{
if (logStats)
LOG_DBG("cache clear " << _cache.size() << " items total size " <<
_cacheSize << " current hits " << _cacheHits);
_cache.clear();
_cacheSize = 0;
_cacheHits = 0;
_cacheTests = 0;
_nextId = 1;
}
// Keep these ids small and wrap them.
TileWireId createNewWireId()
{
TileWireId id = ++_nextId;
// FIXME: if we wrap - we should flush the clients too really ...
if (id < 1)
clearCache(true);
return id;
}
void balanceCache()
{
// A normalish PNG image size for text in a writer document is
// around 4k for a content tile, and sub 1k for a background one.
if (_cacheSize > CacheSizeHardLimit)
{
size_t avgHits = 0;
for (auto it = _cache.begin(); it != _cache.end(); ++it)
avgHits += it->second._hitCount;
LOG_DBG("cache " << _cache.size() << " items total size " <<
_cacheSize << " current hits " << avgHits << ", total hit rate " <<
(_cacheHits * 100. / _cacheTests) << "% at balance start");
avgHits /= _cache.size();
for (auto it = _cache.begin(); it != _cache.end();)
{
if ((_cacheSize > CacheSizeSoftLimit && it->second._hitCount == 0) ||
(_cacheSize > CacheSizeHardLimit && it->second._hitCount > 0 && it->second._hitCount <= avgHits))
{
// Shrink cache when we exceed the size to maximize
// the chance of hitting these entries in the future.
_cacheSize -= it->second._data->size();
auto wIt = _wireToHash.find(it->second._wireId);
assert(wIt != _wireToHash.end());
_wireToHash.erase(wIt);
it = _cache.erase(it);
}
else
{
if (it->second._hitCount > 0)
it->second._hitCount--;
++it;
}
}
LOG_DBG("cache " << _cache.size() << " items total size " <<
_cacheSize << " after balance");
}
}
/// Lookup an entry in the cache and store the data in output.
/// Returns true on success, otherwise false.
bool cacheTest(const uint64_t hash, std::vector<char>& output)
{
if (hash)
{
++_cacheTests;
auto it = _cache.find(hash);
if (it != _cache.end())
{
++_cacheHits;
LOG_DBG("PNG cache with hash " << hash << " hit.");
output.insert(output.end(),
it->second._data->begin(),
it->second._data->end());
it->second._hitCount++;
return true;
}
}
return false;
}
bool cacheEncodeSubBufferToPNG(unsigned char* pixmap, size_t startX, size_t startY,
int width, int height,
int bufferWidth, int bufferHeight,
std::vector<char>& output, LibreOfficeKitTileMode mode,
TileBinaryHash hash, TileWireId wid, TileWireId oldWid)
{
LOG_DBG("PNG cache with hash " << hash << " missed.");
if (_deltaGen.createDelta(pixmap, startX, startY, width, height,
bufferWidth, bufferHeight,
output, wid, oldWid))
return true;
LOG_DBG("Encode a new png for this tile.");
CacheEntry newEntry(bufferWidth * bufferHeight * 1, wid);
if (Png::encodeSubBufferToPNG(pixmap, startX, startY, width, height,
bufferWidth, bufferHeight,
*newEntry._data, mode))
{
if (hash)
{
newEntry._data->shrink_to_fit();
_cache.emplace(hash, newEntry);
_cacheSize += newEntry._data->size();
}
output.insert(output.end(),
newEntry._data->begin(),
newEntry._data->end());
balanceCache();
return true;
}
else
return false;
}
public:
PngCache()
{
clearCache();
}
TileWireId hashToWireId(TileBinaryHash id)
{
TileWireId wid;
if (id == 0)
return 0;
auto it = _cache.find(id);
if (it != _cache.end())
wid = it->second._wireId;
else
{
wid = createNewWireId();
_wireToHash.emplace(wid, id);
}
return wid;
}
bool encodeBufferToPNG(unsigned char* pixmap, int width, int height,
std::vector<char>& output, LibreOfficeKitTileMode mode,
TileBinaryHash hash, TileWireId wid, TileWireId oldWid)
{
if (cacheTest(hash, output))
return true;
return cacheEncodeSubBufferToPNG(pixmap, 0, 0, width, height,
width, height, output, mode,
hash, wid, oldWid);
}
bool encodeSubBufferToPNG(unsigned char* pixmap, size_t startX, size_t startY,
int width, int height,
int bufferWidth, int bufferHeight,
std::vector<char>& output, LibreOfficeKitTileMode mode,
TileBinaryHash hash, TileWireId wid, TileWireId oldWid)
{
if (cacheTest(hash, output))
return true;
return cacheEncodeSubBufferToPNG(pixmap, startX, startY, width, height,
bufferWidth, bufferHeight, output, mode,
hash, wid, oldWid);
}
};
class Watermark
{
public:
Watermark(const std::shared_ptr<lok::Document>& loKitDoc, const std::string& text)
: _loKitDoc(loKitDoc)
, _text(text)
, _font("Liberation Sans")
, _width(0)
, _height(0)
, _color{64, 64, 64}
, _alphaLevel(0.2)
, _pixmap(nullptr)
{
}
~Watermark()
{
if (_pixmap)
std::free(_pixmap);
}
void blending(unsigned char* tilePixmap,
int offsetX, int offsetY,
int tilesPixmapWidth, int tilesPixmapHeight,
int tileWidth, int tileHeight,
LibreOfficeKitTileMode mode)
{
// set requested watermark size a little bit smaller than tile size
int width = tileWidth * 0.9;
int height = tileHeight * 0.9;
const unsigned char* pixmap = getPixmap(width, height);
if (pixmap && tilePixmap)
{
unsigned int pixmapSize = tilesPixmapWidth * tilesPixmapHeight * 4;
int maxX = std::min(tileWidth, _width);
int maxY = std::min(tileHeight, _height);
// center watermark
offsetX += (tileWidth - maxX) / 2;
offsetY += (tileHeight - maxY) / 2;
for (int y = 0; y < maxY; ++y)
{
for (int x = 0; x < maxX; ++x)
{
unsigned int i = (y * _width + x) * 4;
unsigned int alpha = pixmap[i + 3];
if (alpha)
{
for (int h = 0; h < 3; ++h)
{
unsigned int j = ((y + offsetY) * tilesPixmapWidth + (x + offsetX)) * 4 + h;
if (j < pixmapSize)
{
unsigned int color = (mode == LOK_TILEMODE_BGRA) ? _color[2 - h] : _color[h];
// original alpha blending for smoothing text edges
color = ((color * alpha) + tilePixmap[j] * (255 - alpha)) / 255;
// blending between document tile and watermark
tilePixmap[j] = color * _alphaLevel + tilePixmap[j] * (1 - _alphaLevel);
}
}
}
}
}
}
}
private:
const unsigned char* getPixmap(int width, int height)
{
if (_pixmap && width == _width && height == _height)
return _pixmap;
if (_pixmap)
std::free(_pixmap);
_width = width;
_height = height;
if (!_loKitDoc)
{
LOG_ERR("Watermark rendering requested without a valid document.");
return nullptr;
}
// renderFont returns a buffer based on RGBA mode, where r, g, b
// are always set to 0 (black) and the alpha level is 0 everywhere
// except on the text area; the alpha level take into account of
// performing anti-aliasing over the text edges.
_pixmap = _loKitDoc->renderFont(_font.c_str(), _text.c_str(), &_width, &_height);
if (!_pixmap)
{
LOG_ERR("Watermark: rendering failed.");
}
return _pixmap;
}
private:
std::shared_ptr<lok::Document> _loKitDoc;
std::string _text;
std::string _font;
int _width;
int _height;
unsigned char _color[3];
double _alphaLevel;
unsigned char* _pixmap;
};
static FILE* ProcSMapsFile = nullptr;
/// A document container.
/// Owns LOKitDocument instance and connections.
/// Manages the lifetime of a document.
/// Technically, we can host multiple documents
/// per process. But for security reasons don't.
/// However, we could have a loolkit instance
/// per user or group of users (a trusted circle).
class Document : public Runnable, public IDocumentManager
{
public:
/// We have two types of password protected documents
/// 1) Documents which require password to view
/// 2) Document which require password to modify
enum class PasswordType { ToView, ToModify };
public:
Document(const std::shared_ptr<lok::Office>& loKit,
const std::string& jailId,
const std::string& docKey,
const std::string& docId,
const std::string& url,
std::shared_ptr<TileQueue> tileQueue,
const std::shared_ptr<LOOLWebSocket>& ws)
: _loKit(loKit),
_jailId(jailId),
_docKey(docKey),
_docId(docId),
_url(url),
_tileQueue(std::move(tileQueue)),
_ws(ws),
_docPassword(""),
_haveDocPassword(false),
_isDocPasswordProtected(false),
_docPasswordType(PasswordType::ToView),
_stop(false),
_isLoading(0),
_editorId(-1),
_editorChangeWarning(false)
{
LOG_INF("Document ctor for [" << _docKey <<
"] url [" << _url << "] on child [" << _jailId <<
"] and id [" << _docId << "].");
assert(_loKit);
_callbackThread.start(*this);
}
~Document()
{
LOG_INF("~Document dtor for [" << _docKey <<
"] url [" << _url << "] on child [" << _jailId <<
"] and id [" << _docId << "]. There are " <<
_sessions.size() << " views.");
// Wait for the callback worker to finish.
_stop = true;
_tileQueue->put("eof");
_callbackThread.join();
}
const std::string& getUrl() const { return _url; }
bool createSession(const std::string& sessionId)
{
std::unique_lock<std::mutex> lock(_mutex);
try
{
if (_sessions.find(sessionId) != _sessions.end())
{
LOG_WRN("Session [" << sessionId << "] on url [" << _url << "] already exists.");
return true;
}
LOG_INF("Creating " << (_sessions.empty() ? "first" : "new") <<
" session for url: " << _url << " for sessionId: " <<
sessionId << " on jailId: " << _jailId);
auto session = std::make_shared<ChildSession>(sessionId, _jailId, *this);
_sessions.emplace(sessionId, session);
int viewId = session->getViewId();
_lastUpdatedAt[viewId] = std::chrono::steady_clock::now();
_speedCount[viewId] = 0;
LOG_DBG("Sessions: " << _sessions.size());
return true;
}
catch (const std::exception& ex)
{
LOG_ERR("Exception while creating session [" << sessionId <<
"] on url [" << _url << "] - '" << ex.what() << "'.");
return false;
}
}
/// Purges dead connections and returns
/// the remaining number of clients.
/// Returns -1 on failure.
size_t purgeSessions()
{
std::vector<std::shared_ptr<ChildSession>> deadSessions;
size_t num_sessions = 0;
{
std::unique_lock<std::mutex> lock(_mutex, std::defer_lock);
if (!lock.try_lock())
{
// Not a good time, try later.
return -1;
}
// If there are no live sessions, we don't need to do anything at all and can just
// bluntly exit, no need to clean up our own data structures. Also, there is a bug that
// causes the deadSessions.clear() call below to crash in some situations when the last
// session is being removed.
for (auto it = _sessions.cbegin(); it != _sessions.cend(); )
{
if (it->second->isCloseFrame())
{
deadSessions.push_back(it->second);
it = _sessions.erase(it);
}
else
{
++it;
}
}
num_sessions = _sessions.size();
if (num_sessions == 0)
{
LOG_INF("Document [" << _url << "] has no more views, exiting bluntly.");
std::_Exit(Application::EXIT_OK);
}
}
// Don't destroy sessions while holding our lock.
// We may deadlock if a session is waiting on us
// during callback initiated while handling a command
// and the dtor tries to take its lock (which is taken).
deadSessions.clear();
return num_sessions;
}
/// Set Document password for given URL
void setDocumentPassword(int passwordType)
{
LOG_INF("setDocumentPassword: passwordProtected=" << _isDocPasswordProtected <<
" passwordProvided=" << _haveDocPassword <<
" password='" << _docPassword << "'");
Util::assertIsLocked(_documentMutex);
if (_isDocPasswordProtected && _haveDocPassword)
{
// it means this is the second attempt with the wrong password; abort the load operation
_loKit->setDocumentPassword(_jailedUrl.c_str(), nullptr);
return;
}
// One thing for sure, this is a password protected document
_isDocPasswordProtected = true;
if (passwordType == LOK_CALLBACK_DOCUMENT_PASSWORD)
_docPasswordType = PasswordType::ToView;
else if (passwordType == LOK_CALLBACK_DOCUMENT_PASSWORD_TO_MODIFY)
_docPasswordType = PasswordType::ToModify;
LOG_INF("Calling _loKit->setDocumentPassword");
if (_haveDocPassword)
_loKit->setDocumentPassword(_jailedUrl.c_str(), _docPassword.c_str());
else
_loKit->setDocumentPassword(_jailedUrl.c_str(), nullptr);
LOG_INF("setDocumentPassword returned");
}
void renderTile(const std::vector<std::string>& tokens, const std::shared_ptr<LOOLWebSocket>& ws)
{
assert(ws && "Expected a non-null websocket.");
auto tile = TileDesc::parse(tokens);
size_t pixmapDataSize = 4 * tile.getWidth() * tile.getHeight();
std::vector<unsigned char> pixmap;
pixmap.resize(pixmapDataSize);
std::unique_lock<std::mutex> lock(_documentMutex);
if (!_loKitDocument)
{
LOG_ERR("Tile rendering requested before loading document.");
return;
}
if (_loKitDocument->getViewsCount() <= 0)
{
LOG_ERR("Tile rendering requested without views.");
return;
}
const double area = tile.getWidth() * tile.getHeight();
Timestamp timestamp;
_loKitDocument->paintPartTile(pixmap.data(), tile.getPart(),
tile.getWidth(), tile.getHeight(),
tile.getTilePosX(), tile.getTilePosY(),
tile.getTileWidth(), tile.getTileHeight());
const auto elapsed = timestamp.elapsed();
LOG_TRC("paintTile at (" << tile.getPart() << ',' << tile.getTilePosX() << ',' << tile.getTilePosY() <<
") " << "ver: " << tile.getVersion() << " rendered in " << (elapsed/1000.) <<
" ms (" << area / elapsed << " MP/s).");
const auto mode = static_cast<LibreOfficeKitTileMode>(_loKitDocument->getTileMode());
const TileBinaryHash hash = Png::hashBuffer(pixmap.data(), tile.getWidth(), tile.getHeight());
TileWireId wid = _pngCache.hashToWireId(hash);
TileWireId oldWireId = tile.getOldWireId();
tile.setWireId(wid);
if (hash != 0 && oldWireId == wid)
{
// The tile content is identical to what the client already has, so skip it
LOG_TRC("Match oldWireId==wid (" << wid << " for hash " << hash << "); unchanged");
return;
}
// Send back the request with all optional parameters given in the request.
std::string response = ADD_DEBUG_RENDERID(tile.serialize("tile:")) + "\n";
int pixelWidth = tile.getWidth();
int pixelHeight = tile.getHeight();
if (_docWatermark)
_docWatermark->blending(pixmap.data(), 0, 0, pixelWidth, pixelHeight, pixelWidth, pixelHeight, mode);
std::vector<char> output;
output.reserve(response.size() + pixmapDataSize);
output.resize(response.size());
std::memcpy(output.data(), response.data(), response.size());
if (!_pngCache.encodeBufferToPNG(pixmap.data(), tile.getWidth(), tile.getHeight(), output, mode, hash, wid, oldWireId))
{
//FIXME: Return error.
//sendTextFrame("error: cmd=tile kind=failure");
LOG_ERR("Failed to encode tile into PNG.");
return;
}
LOG_TRC("Sending render-tile response (" << output.size() << " bytes) for: " << response);
ws->sendFrame(output.data(), output.size(), WebSocket::FRAME_BINARY);
}
void renderDialog(const std::vector<std::string>& tokens, const std::shared_ptr<LOOLWebSocket>& ws)
{
assert(ws && "Expected a non-null websocket.");
const bool child = tokens[0] == "dialogchild";
std::unique_lock<std::mutex> lock(_documentMutex);
if (!_loKitDocument)
{
LOG_ERR("Dialog rendering requested before loading document.");
return;
}
if (_loKitDocument->getViewsCount() <= 0)
{
LOG_ERR("Dialog rendering requested without views.");
return;
}
int startX = 0, startY = 0;
int bufferWidth = 800, bufferHeight = 600; // hopefully, this is big enough
std::string paintRectangle;
// find the rectangle to paint, if specified
if (tokens.size() >= 3 && getTokenString(tokens[2], "rectangle", paintRectangle))
{
const std::vector<std::string> rectParts = LOOLProtocol::tokenize(paintRectangle.c_str(), paintRectangle.length(), ',');
startX = std::atoi(rectParts[0].c_str());
startY = std::atoi(rectParts[1].c_str());
bufferWidth = std::atoi(rectParts[2].c_str());
bufferHeight = std::atoi(rectParts[3].c_str());
}
size_t pixmapDataSize = 4 * bufferWidth * bufferHeight;
std::vector<unsigned char> pixmap(pixmapDataSize);
char* pDialogTitle = nullptr;
int width = bufferWidth;
int height = bufferHeight;
std::string response;
if (child)
{
Timestamp timestamp;
_loKitDocument->paintActiveFloatingWindow(tokens[1].c_str(), pixmap.data(), width, height);
const auto elapsed = timestamp.elapsed();
const double area = width * height;
LOG_TRC("paintActiveFloatingWindow for " << tokens[1] << " returned floating window "
<< width << "X" << height << " "
<< "rendered in " << (elapsed/1000.)
<< "ms (" << area / elapsed << " MP/s).");
response = "dialogchildpaint: id=" + tokens[1] + " width=" + std::to_string(width) + " height=" + std::to_string(height) + "\n";
}
else
{
Timestamp timestamp;
_loKitDocument->paintDialog(tokens[1].c_str(), pixmap.data(), startX, startY, width, height);
const auto elapsed = timestamp.elapsed();
int dialogWidth = 0;
int dialogHeight = 0;
_loKitDocument->getDialogInfo(tokens[1].c_str(), &pDialogTitle, dialogWidth, dialogHeight);
std::string encodedDialogTitle;
if (pDialogTitle)
{
std::string aDialogTitle(pDialogTitle);
URI::encode(aDialogTitle, "", encodedDialogTitle);
free(pDialogTitle);
}
// rendered width, height cannot be less than the dialog width, height
width = std::min(width, dialogWidth);
height = std::min(height, dialogHeight);
const double area = width * height;
LOG_TRC("paintDialog for " << tokens[1] << " returned " << width << "X" << height
<< "@(" << startX << "," << startY << ")"
<< "and rendered in " << (elapsed/1000.)
<< "ms (" << area / elapsed << " MP/s).");
response = "dialogpaint: id=" + tokens[1] + " title=" + encodedDialogTitle +
" dialogwidth=" + std::to_string(dialogWidth) + " dialogheight=" + std::to_string(dialogHeight);
if (!paintRectangle.empty())
response += " rectangle=" + paintRectangle;
response += "\n";
}
std::vector<char> output;
output.reserve(response.size() + pixmapDataSize);
output.resize(response.size());
std::memcpy(output.data(), response.data(), response.size());
// TODO: use png cache for dialogs too
if (!Png::encodeSubBufferToPNG(pixmap.data(), 0, 0, width, height, bufferWidth, bufferHeight, output, LOK_TILEMODE_RGBA))
{
LOG_ERR("Failed to encode into PNG.");
return;
}
LOG_TRC("Sending response (" << output.size() << " bytes) for: " << response);
ws->sendFrame(output.data(), output.size(), WebSocket::FRAME_BINARY);
}
void renderCombinedTiles(const std::vector<std::string>& tokens, const std::shared_ptr<LOOLWebSocket>& ws)
{
assert(ws && "Expected a non-null websocket.");
auto tileCombined = TileCombined::parse(tokens);
auto& tiles = tileCombined.getTiles();
Util::Rectangle renderArea;
std::vector<Util::Rectangle> tileRecs;
tileRecs.reserve(tiles.size());
for (auto& tile : tiles)
{
Util::Rectangle rectangle(tile.getTilePosX(), tile.getTilePosY(),
tileCombined.getTileWidth(), tileCombined.getTileHeight());
if (tileRecs.empty())
{
renderArea = rectangle;
}
else
{
renderArea.extend(rectangle);
}
tileRecs.push_back(rectangle);
}
const size_t tilesByX = renderArea.getWidth() / tileCombined.getTileWidth();
const size_t tilesByY = renderArea.getHeight() / tileCombined.getTileHeight();
const size_t pixmapWidth = tilesByX * tileCombined.getWidth();
const size_t pixmapHeight = tilesByY * tileCombined.getHeight();
const size_t pixmapSize = 4 * pixmapWidth * pixmapHeight;
std::vector<unsigned char> pixmap(pixmapSize, 0);
std::unique_lock<std::mutex> lock(_documentMutex);
if (!_loKitDocument)
{
LOG_ERR("Tile rendering requested before loading document.");
return;
}
if (_loKitDocument->getViewsCount() <= 0)
{
LOG_ERR("Tile rendering requested without views.");
return;
}
const double area = pixmapWidth * pixmapHeight;
Timestamp timestamp;
_loKitDocument->paintPartTile(pixmap.data(), tileCombined.getPart(),
pixmapWidth, pixmapHeight,
renderArea.getLeft(), renderArea.getTop(),
renderArea.getWidth(), renderArea.getHeight());
Timestamp::TimeDiff elapsed = timestamp.elapsed();
LOG_DBG("paintTile (combined) at (" << renderArea.getLeft() << ", " << renderArea.getTop() << "), (" <<
renderArea.getWidth() << ", " << renderArea.getHeight() << ") " <<
" rendered in " << (elapsed/1000.) << " ms (" << area / elapsed << " MP/s).");
const auto mode = static_cast<LibreOfficeKitTileMode>(_loKitDocument->getTileMode());
std::vector<char> output;
output.reserve(pixmapSize);
size_t tileIndex = 0;
for (Util::Rectangle& tileRect : tileRecs)
{
const size_t positionX = (tileRect.getLeft() - renderArea.getLeft()) / tileCombined.getTileWidth();
const size_t positionY = (tileRect.getTop() - renderArea.getTop()) / tileCombined.getTileHeight();
const auto oldSize = output.size();
const auto pixelWidth = tileCombined.getWidth();
const auto pixelHeight = tileCombined.getHeight();
const uint64_t hash = Png::hashSubBuffer(pixmap.data(), positionX * pixelWidth, positionY * pixelHeight,
pixelWidth, pixelHeight, pixmapWidth, pixmapHeight);
TileWireId wireId = _pngCache.hashToWireId(hash);
TileWireId oldWireId = tiles[tileIndex].getOldWireId();
if (hash != 0 && oldWireId == wireId)
{
// The tile content is identical to what the client already has, so skip it
LOG_TRC("Match for tile #" << tileIndex << " at (" << positionX << "," <<
positionY << ") oldhash==hash (" << hash << "), wireId: " << wireId << " skipping");
tiles.erase(tiles.begin() + tileIndex);
continue;
}
int offsetX = positionX * pixelWidth;
int offsetY = positionY * pixelHeight;
if (_docWatermark)
_docWatermark->blending(pixmap.data(), offsetX, offsetY,
pixmapWidth, pixmapHeight,
tileCombined.getWidth(), tileCombined.getHeight(),
mode);
if (!_pngCache.encodeSubBufferToPNG(pixmap.data(), positionX * pixelWidth, positionY * pixelHeight,
pixelWidth, pixelHeight, pixmapWidth, pixmapHeight, output, mode,
hash, wireId, oldWireId))
{
//FIXME: Return error.
//sendTextFrame("error: cmd=tile kind=failure");
LOG_ERR("Failed to encode tile into PNG.");
return;
}
const auto imgSize = output.size() - oldSize;
LOG_TRC("Encoded tile #" << tileIndex << " at (" << positionX << "," << positionY << ") with oldWireId=" <<
tiles[tileIndex].getOldWireId() << ", hash=" << hash << " wireId: " << wireId << " in " << imgSize << " bytes.");
tiles[tileIndex].setWireId(wireId);
tiles[tileIndex].setImgSize(imgSize);
tileIndex++;
}
elapsed = timestamp.elapsed();
LOG_DBG("renderCombinedTiles at (" << renderArea.getLeft() << ", " << renderArea.getTop() << "), (" <<
renderArea.getWidth() << ", " << renderArea.getHeight() << ") " <<
" took " << (elapsed/1000.) << " ms (including the paintTile).");
const auto tileMsg = ADD_DEBUG_RENDERID(tileCombined.serialize("tilecombine:")) + "\n";
LOG_TRC("Sending back painted tiles for " << tileMsg);
std::vector<char> response;
response.resize(tileMsg.size() + output.size());
std::copy(tileMsg.begin(), tileMsg.end(), response.begin());
std::copy(output.begin(), output.end(), response.begin() + tileMsg.size());
ws->sendFrame(response.data(), response.size(), WebSocket::FRAME_BINARY);
}
bool sendTextFrame(const std::string& message) override
{
try
{
if (!_ws || _ws->poll(Poco::Timespan(0), Poco::Net::Socket::SelectMode::SELECT_ERROR))
{
LOG_ERR("Child Doc: Bad socket while sending [" << getAbbreviatedMessage(message) << "].");
return false;
}
_ws->sendFrame(message.data(), message.size());
return true;
}
catch (const Exception& exc)
{
LOG_ERR("Document::sendTextFrame: Exception: " << exc.displayText() <<
(exc.nested() ? "( " + exc.nested()->displayText() + ")" : ""));
}
return false;
}
static void GlobalCallback(const int type, const char* p, void* data)
{
if (TerminationFlag)
{
return;
}
const std::string payload = p ? p : "(nil)";
LOG_TRC("Document::GlobalCallback " << LOKitHelper::kitCallbackTypeToString(type) <<
" [" << payload << "].");
Document* self = static_cast<Document*>(data);
if (type == LOK_CALLBACK_DOCUMENT_PASSWORD_TO_MODIFY ||
type == LOK_CALLBACK_DOCUMENT_PASSWORD)
{
// Mark the document password type.
self->setDocumentPassword(type);
return;
}
// Broadcast leftover status indicator callbacks to all clients
self->broadcastCallbackToClients(type, payload);
}
static void ViewCallback(const int type, const char* p, void* data)
{
if (TerminationFlag)
{
return;
}
CallbackDescriptor* descriptor = static_cast<CallbackDescriptor*>(data);
assert(descriptor && "Null callback data.");
assert(descriptor->Doc && "Null Document instance.");
auto tileQueue = descriptor->Doc->getTileQueue();
assert(tileQueue && "Null TileQueue.");
const std::string payload = p ? p : "(nil)";
LOG_TRC("Document::ViewCallback [" << descriptor->ViewId <<
"] [" << LOKitHelper::kitCallbackTypeToString(type) <<
"] [" << payload << "].");
// when we examine the content of the JSON
std::string targetViewId;
if (type == LOK_CALLBACK_INVALIDATE_VISIBLE_CURSOR ||
type == LOK_CALLBACK_CELL_CURSOR)
{
Poco::StringTokenizer tokens(payload, ",", Poco::StringTokenizer::TOK_IGNORE_EMPTY | Poco::StringTokenizer::TOK_TRIM);
// Payload may be 'EMPTY'.
if (tokens.count() == 4)
{
auto cursorX = std::stoi(tokens[0]);
auto cursorY = std::stoi(tokens[1]);
auto cursorWidth = std::stoi(tokens[2]);
auto cursorHeight = std::stoi(tokens[3]);
tileQueue->updateCursorPosition(0, 0, cursorX, cursorY, cursorWidth, cursorHeight);
}
}
else if (type == LOK_CALLBACK_INVALIDATE_VIEW_CURSOR ||
type == LOK_CALLBACK_CELL_VIEW_CURSOR)
{
Poco::JSON::Parser parser;
const auto result = parser.parse(payload);
const auto& command = result.extract<Poco::JSON::Object::Ptr>();
targetViewId = command->get("viewId").toString();
auto part = command->get("part").toString();
auto text = command->get("rectangle").toString();
Poco::StringTokenizer tokens(text, ",", Poco::StringTokenizer::TOK_IGNORE_EMPTY | Poco::StringTokenizer::TOK_TRIM);
// Payload may be 'EMPTY'.
if (tokens.count() == 4)
{
auto cursorX = std::stoi(tokens[0]);
auto cursorY = std::stoi(tokens[1]);
auto cursorWidth = std::stoi(tokens[2]);
auto cursorHeight = std::stoi(tokens[3]);
tileQueue->updateCursorPosition(std::stoi(targetViewId), std::stoi(part), cursorX, cursorY, cursorWidth, cursorHeight);
}
}
// merge various callback types together if possible
if (type == LOK_CALLBACK_INVALIDATE_TILES ||
type == LOK_CALLBACK_DOCUMENT_SIZE_CHANGED)
{
// no point in handling invalidations or page resizes per-view,
// all views have to be in sync
tileQueue->put("callback all " + std::to_string(type) + ' ' + payload);
}
else if (type == LOK_CALLBACK_INVALIDATE_VIEW_CURSOR ||
type == LOK_CALLBACK_CELL_VIEW_CURSOR)
{
// these should go to all views but the one that that triggered it
tileQueue->put("callback except-" + targetViewId + ' ' + std::to_string(type) + ' ' + payload);
}
else
tileQueue->put("callback " + std::to_string(descriptor->ViewId) + ' ' + std::to_string(type) + ' ' + payload);
}
private:
/// Helper method to broadcast callback and its payload to all clients
void broadcastCallbackToClients(const int type, const std::string& payload)
{
// "-1" means broadcast
_tileQueue->put("callback all " + std::to_string(type) + ' ' + payload);
}
/// Load a document (or view) and register callbacks.
bool onLoad(const std::string& sessionId,
const std::string& uri,
const std::string& userName,
const std::string& docPassword,
const std::string& renderOpts,
const bool haveDocPassword,
const std::string& lang,
const std::string& watermarkText) override
{
std::unique_lock<std::mutex> lock(_mutex);
LOG_INF("Loading url [" << uri << "] for session [" << sessionId <<
"] which has " << (_sessions.size() - 1) <<
" sessions. Another load in progress: " << _isLoading);
while (_isLoading)
{
_cvLoading.wait(lock);
}
// This shouldn't happen, but for sanity.
const auto it = _sessions.find(sessionId);
if (it == _sessions.end() || !it->second)
{
LOG_ERR("Cannot find session [" << sessionId << "] to load view for.");
return false;
}
auto session = it->second;
// Flag and release lock.
++_isLoading;
lock.unlock();
try
{
if (!load(session, uri, userName, docPassword, renderOpts, haveDocPassword, lang, watermarkText))
{
return false;
}
}
catch (const std::exception& exc)
{
LOG_ERR("Exception while loading url [" << uri <<
"] for session [" << sessionId << "]: " << exc.what());
return false;
}
--_isLoading;
_cvLoading.notify_one();
return true;
}
void onUnload(const ChildSession& session) override
{
const auto& sessionId = session.getId();
LOG_INF("Unloading session [" << sessionId << "] on url [" << _url << "].");
const auto viewId = session.getViewId();
_tileQueue->removeCursorPosition(viewId);
std::unique_lock<std::mutex> lockLokDoc(_documentMutex);
if (_loKitDocument == nullptr)
{
LOG_ERR("Unloading session [" << sessionId << "] without loKitDocument.");
return;
}
_loKitDocument->setView(viewId);
_loKitDocument->registerCallback(nullptr, nullptr);
int viewCount = _loKitDocument->getViewsCount();
if (viewCount == 1)
{
std::unique_lock<std::mutex> lock(_mutex);
if (_sessions.empty())
{
LOG_INF("Document [" << _url << "] has no more views, exiting bluntly.");
std::_Exit(Application::EXIT_OK);
}
LOG_INF("Document [" << _url << "] has no more views, but has " <<
_sessions.size() << " sessions still. Destroying the document.");
_loKitDocument.reset();
LOG_INF("Document [" << _url << "] session [" << sessionId << "] unloaded Document.");
return;
}
else
{
_loKitDocument->destroyView(viewId);
}
// Since callback messages are processed on idle-timer,
// we could recieve callbacks after destroying a view.
// Retain the CallbackDescriptor object, which is shared with Core.
// _viewIdToCallbackDescr.erase(viewId);
viewCount = _loKitDocument->getViewsCount();
LOG_INF("Document [" << _url << "] session [" <<
sessionId << "] unloaded view [" << viewId << "]. Have " <<
viewCount << " view" << (viewCount != 1 ? "s." : "."));
if (viewCount > 0)
{
// Broadcast updated view info
notifyViewInfo();
}
}
std::map<int, UserInfo> getViewInfo() override
{
std::unique_lock<std::mutex> lock(_mutex);
return _sessionUserInfo;
}
std::mutex& getMutex() override
{
return _mutex;
}
std::shared_ptr<TileQueue>& getTileQueue() override
{
return _tileQueue;
}
int getEditorId() override
{
return _editorId;
}
/// Notify all views of viewId and their associated usernames
void notifyViewInfo() override
{
Util::assertIsLocked(_documentMutex);
// Get the list of view ids from the core
const int viewCount = getLOKitDocument()->getViewsCount();
std::vector<int> viewIds(viewCount);
getLOKitDocument()->getViewIds(viewIds.data(), viewCount);
const std::map<int, UserInfo> viewInfoMap = _sessionUserInfo;
const std::map<std::string, int> viewColorsMap = getViewColors();
// Double check if list of viewids from core and our list matches,
// and create an array of JSON objects containing id and username
std::ostringstream oss;
oss << "viewinfo: [";
for (const auto& viewId : viewIds)
{
oss << "{\"id\":" << viewId << ",";
int color = 0;
const auto itView = viewInfoMap.find(viewId);
if (itView == viewInfoMap.end())
{
LOG_ERR("No username found for viewId [" << viewId << "].");
oss << "\"username\":\"Unknown\",";
}
else
{
oss << "\"userid\":\"" << itView->second.UserId << "\",";
const auto username = itView->second.Username;
oss << "\"username\":\"" << username << "\",";
if (!itView->second.UserExtraInfo.empty())
oss << "\"userextrainfo\":" << itView->second.UserExtraInfo << ",";
const auto readonly = itView->second.IsReadOnly;
oss << "\"readonly\":\"" << readonly << "\",";
const auto it = viewColorsMap.find(username);
if (it != viewColorsMap.end())
{
color = it->second;
}
}
oss << "\"color\":" << color << "},";
}
oss.seekp(-1, std::ios_base::cur); // Remove last comma.
oss << "]";
const auto msg = oss.str();
// Broadcast updated viewinfo to all clients.
sendTextFrame("client-all " + msg);
}
void updateEditorSpeeds(int id, int speed) override
{
int maxSpeed = -1, fastestUser = -1;
auto now = std::chrono::steady_clock::now();
_lastUpdatedAt[id] = now;
_speedCount[id] = speed;
for (const auto& it : _sessions)
{
const auto session = it.second;
int sessionId = session->getViewId();
auto duration = (_lastUpdatedAt[id] - now);
auto durationInMs = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count();
if (_speedCount[sessionId] != 0 && durationInMs > 5000)
{
_speedCount[sessionId] = session->getSpeed();
_lastUpdatedAt[sessionId] = now;
}
if (_speedCount[sessionId] > maxSpeed)
{
maxSpeed = _speedCount[sessionId];
fastestUser = sessionId;
}
}
// 0 for preventing selection of the first always
// 1 for preventing the new users from directly beoming the editors
if (_editorId != fastestUser && (maxSpeed != 0 && maxSpeed != 1)) {
if (!_editorChangeWarning && _editorId != -1)
{
_editorChangeWarning = true;
}
else
{
_editorChangeWarning = false;
_editorId = fastestUser;
for (const auto& it : _sessions)
it.second->sendTextFrame("editor: " + std::to_string(_editorId));
}
}
else
_editorChangeWarning = false;
}
private:
// Get the color value for all author names from the core
std::map<std::string, int> getViewColors()
{
Util::assertIsLocked(_documentMutex);
char* values = _loKitDocument->getCommandValues(".uno:TrackedChangeAuthors");
const std::string colorValues = std::string(values == nullptr ? "" : values);
std::free(values);
std::map<std::string, int> viewColors;
try
{
if (!colorValues.empty())
{
Poco::JSON::Parser parser;
auto root = parser.parse(colorValues).extract<Poco::JSON::Object::Ptr>();
if (root->get("authors").type() == typeid(Poco::JSON::Array::Ptr))
{
auto authorsArray = root->get("authors").extract<Poco::JSON::Array::Ptr>();
for (auto& authorVar: *authorsArray)
{
auto authorObj = authorVar.extract<Poco::JSON::Object::Ptr>();
auto authorName = authorObj->get("name").convert<std::string>();
auto colorValue = authorObj->get("color").convert<int>();
viewColors[authorName] = colorValue;
}
}
}
}
catch(const Exception& exc)
{
LOG_ERR("Poco Exception: " << exc.displayText() <<
(exc.nested() ? " (" + exc.nested()->displayText() + ")" : ""));
}
return viewColors;
}
std::shared_ptr<lok::Document> load(const std::shared_ptr<ChildSession>& session,
const std::string& uri,
const std::string& userName,
const std::string& docPassword,
const std::string& renderOpts,
const bool haveDocPassword,
const std::string& lang,
const std::string& watermarkText)
{
const std::string sessionId = session->getId();
std::unique_lock<std::mutex> lock(_documentMutex);
if (!_loKitDocument)
{
// This is the first time we are loading the document
LOG_INF("Loading new document from URI: [" << uri << "] for session [" << sessionId << "].");
_loKit->registerCallback(GlobalCallback, this);
const auto flags = LOK_FEATURE_DOCUMENT_PASSWORD
| LOK_FEATURE_DOCUMENT_PASSWORD_TO_MODIFY
| LOK_FEATURE_PART_IN_INVALIDATION_CALLBACK
| LOK_FEATURE_NO_TILED_ANNOTATIONS;
_loKit->setOptionalFeatures(flags);
// Save the provided password with us and the jailed url
_haveDocPassword = haveDocPassword;
_docPassword = docPassword;
_jailedUrl = uri;
_isDocPasswordProtected = false;
std::string options;
if (!lang.empty())
options = "Language=" + lang;
LOG_DBG("Calling lokit::documentLoad(" << uri << ", \"" << options << "\").");
Timestamp timestamp;
_loKitDocument.reset(_loKit->documentLoad(uri.c_str(), options.c_str()));
LOG_DBG("Returned lokit::documentLoad(" << uri << ") in " << (timestamp.elapsed() / 1000.) << "ms.");
if (!_loKitDocument || !_loKitDocument->get())
{
LOG_ERR("Failed to load: " << uri << ", error: " << _loKit->getError());
// Checking if wrong password or no password was reason for failure.
if (_isDocPasswordProtected)
{
LOG_INF("Document [" << uri << "] is password protected.");
if (!_haveDocPassword)
{
LOG_INF("No password provided for password-protected document [" << uri << "].");
std::string passwordFrame = "passwordrequired:";
if (_docPasswordType == PasswordType::ToView)
passwordFrame += "to-view";
else if (_docPasswordType == PasswordType::ToModify)
passwordFrame += "to-modify";
session->sendTextFrame("error: cmd=load kind=" + passwordFrame);
}
else
{
LOG_INF("Wrong password for password-protected document [" << uri << "].");
session->sendTextFrame("error: cmd=load kind=wrongpassword");
}
}
return nullptr;
}
// Only save the options on opening the document.
// No support for changing them after opening a document.
_renderOpts = renderOpts;
if (!watermarkText.empty())
_docWatermark.reset(new Watermark(_loKitDocument, watermarkText));
}
else
{
LOG_INF("Document with url [" << uri << "] already loaded. Need to create new view for session [" << sessionId << "].");
// Check if this document requires password
if (_isDocPasswordProtected)
{
if (!haveDocPassword)
{
std::string passwordFrame = "passwordrequired:";
if (_docPasswordType == PasswordType::ToView)
passwordFrame += "to-view";
else if (_docPasswordType == PasswordType::ToModify)
passwordFrame += "to-modify";
session->sendTextFrame("error: cmd=load kind=" + passwordFrame);
return nullptr;
}
else if (docPassword != _docPassword)
{
session->sendTextFrame("error: cmd=load kind=wrongpassword");
return nullptr;
}
}
LOG_INF("Creating view to url [" << uri << "] for session [" << sessionId << "].");
_loKitDocument->createView();
LOG_TRC("View to url [" << uri << "] created.");
}
const std::string renderParams = makeRenderParams(userName);
LOG_INF("Initializing for rendering session [" << sessionId << "] on document url [" <<
_url << "] with: [" << renderParams << "].");
// initializeForRendering() should be called before
// registerCallback(), as the previous creates a new view in Impress.
_loKitDocument->initializeForRendering(renderParams.c_str());
const int viewId = _loKitDocument->getView();
session->setViewId(viewId);
_sessionUserInfo[viewId] = UserInfo(session->getViewUserId(), session->getViewUserName(),
session->getViewUserExtraInfo(), session->isReadOnly());
_viewIdToCallbackDescr.emplace(viewId,
std::unique_ptr<CallbackDescriptor>(new CallbackDescriptor({ this, viewId })));
_loKitDocument->registerCallback(ViewCallback, _viewIdToCallbackDescr[viewId].get());
const int viewCount = _loKitDocument->getViewsCount();
LOG_INF("Document url [" << _url << "] for session [" <<
sessionId << "] loaded view [" << viewId << "]. Have " <<
viewCount << " view" << (viewCount != 1 ? "s." : "."));
return _loKitDocument;
}
bool forwardToChild(const std::string& prefix, const std::vector<char>& payload)
{
assert(payload.size() > prefix.size());
// Remove the prefix and trim.
size_t index = prefix.size();
for ( ; index < payload.size(); ++index)
{
if (payload[index] != ' ')
{
break;
}
}
auto data = payload.data() + index;
auto size = payload.size() - index;
std::string name;
std::string sessionId;
if (LOOLProtocol::parseNameValuePair(prefix, name, sessionId, '-') && name == "child")
{
std::unique_lock<std::mutex> lock(_mutex);
const auto it = _sessions.find(sessionId);
if (it != _sessions.end())
{
auto session = it->second;
static const std::string disconnect("disconnect");
if (size == disconnect.size() &&
strncmp(data, disconnect.data(), disconnect.size()) == 0)
{
if(session->getViewId() == _editorId) {
_editorId = -1;
}
LOG_DBG("Removing ChildSession [" << sessionId << "].");
_sessions.erase(it);
const auto count = _sessions.size();
LOG_DBG("Have " << count << " child" << (count == 1 ? "" : "ren") <<
" after removing ChildSession [" << sessionId << "].");
// No longer needed, and allow session dtor to take it.
lock.unlock();
session.reset();
return true;
}
// No longer needed, and allow the handler to take it.
lock.unlock();
if (session)
{
std::vector<char> vect(size);
vect.assign(data, data + size);
// TODO loolnb - this is probably wrong...
session->handleMessage(/* fin = */ false, WSOpCode::Binary, vect);
return true;
}
}
const auto abbrMessage = getAbbreviatedMessage(data, size);
LOG_WRN("Child session [" << sessionId << "] not found to forward message: " << abbrMessage);
}
else
{
LOG_ERR("Failed to parse prefix of forward-to-child message: " << prefix);
}
return false;
}
std::string makeRenderParams(const std::string& userName)
{
Object::Ptr renderOptsObj;
// Fill the object with renderoptions, if any
if (!_renderOpts.empty())
{
Parser parser;
Poco::Dynamic::Var var = parser.parse(_renderOpts);
renderOptsObj = var.extract<Object::Ptr>();
}
else if (!userName.empty())
{
renderOptsObj = new Object();
}
// Append name of the user, if any, who opened the document to rendering options
if (!userName.empty())
{
Object::Ptr authorObj = new Object();
authorObj->set("type", "string");
std::string decodedUserName;
URI::decode(userName, decodedUserName);
authorObj->set("value", decodedUserName);
renderOptsObj->set(".uno:Author", authorObj);
}
std::string renderParams;
if (renderOptsObj)
{
std::ostringstream ossRenderOpts;
renderOptsObj->stringify(ossRenderOpts);
renderParams = ossRenderOpts.str();
}
return renderParams;
}
void run() override
{
Util::setThreadName("lokit_" + _docId);
LOG_DBG("Thread started.");
// Update memory stats and editor every 5 seconds.
const auto memStatsPeriodMs = 5000;
auto lastMemStatsTime = std::chrono::steady_clock::now();
sendTextFrame(Util::getMemoryStats(ProcSMapsFile));
try
{
while (!_stop && !TerminationFlag)
{
const TileQueue::Payload input = _tileQueue->get(POLL_TIMEOUT_MS * 2);
if (input.empty())
{
auto duration = (std::chrono::steady_clock::now() - lastMemStatsTime);
auto durationMs = std::chrono::duration_cast<std::chrono::milliseconds>(duration).count();
if (durationMs > memStatsPeriodMs)
{
sendTextFrame(Util::getMemoryStats(ProcSMapsFile));
lastMemStatsTime = std::chrono::steady_clock::now();
}
continue;
}
LOG_TRC("Kit Recv " << LOOLProtocol::getAbbreviatedMessage(input));
if (_stop || TerminationFlag)
{
LOG_INF("Kit: Stop flagged.");
break;
}
const auto tokens = LOOLProtocol::tokenize(input.data(), input.size());
if (tokens[0] == "eof")
{
LOG_INF("Received EOF. Finishing.");
break;
}
if (tokens[0] == "tile")
{
renderTile(tokens, _ws);
}
else if (tokens[0] == "tilecombine")
{
renderCombinedTiles(tokens, _ws);
}
else if (tokens[0] == "dialog" || tokens[0] == "dialogchild")
{
renderDialog(tokens, _ws);
}
else if (LOOLProtocol::getFirstToken(tokens[0], '-') == "child")
{
forwardToChild(tokens[0], input);
}
else if (tokens[0] == "callback")
{
if (tokens.size() >= 3)
{
bool broadcast = false;
int viewId = -1;
int exceptViewId = -1;
const std::string& target = tokens[1];
if (target == "all")
{
broadcast = true;
}
else if (LOOLProtocol::matchPrefix("except-", target))
{
exceptViewId = std::stoi(target.substr(7));
broadcast = true;
}
else
{
viewId = std::stoi(target);
}
const int type = std::stoi(tokens[2]);
// payload is the rest of the message
const auto offset = tokens[0].length() + tokens[1].length() + tokens[2].length() + 3; // + delims
const std::string payload(input.data() + offset, input.size() - offset);
// Forward the callback to the same view, demultiplexing is done by the LibreOffice core.
// TODO: replace with a map to be faster.
bool isFound = false;
for (auto& it : _sessions)
{
auto session = it.second;
if (session && ((broadcast && (session->getViewId() != exceptViewId)) || (!broadcast && (session->getViewId() == viewId))))
{
if (!it.second->isCloseFrame())
{
isFound = true;
session->loKitCallback(type, payload);
}
else
{
LOG_ERR("Session-thread of session [" << session->getId() << "] for view [" <<
viewId << "] is not running. Dropping [" << LOKitHelper::kitCallbackTypeToString(type) <<
"] payload [" << payload << "].");
}
if (!broadcast)
{
break;
}
}
}
if (!isFound)
{
LOG_WRN("Document::ViewCallback. Session [" << viewId <<
"] is no longer active to process [" << LOKitHelper::kitCallbackTypeToString(type) <<
"] [" << payload << "] message to Master Session.");
}
}
else
{
LOG_ERR("Invalid callback message: [" << LOOLProtocol::getAbbreviatedMessage(input) << "].");
}
}
else
{
LOG_ERR("Unexpected request: [" << LOOLProtocol::getAbbreviatedMessage(input) << "].");
}
}
}
catch (const std::exception& exc)
{
LOG_ERR("QueueHandler::run: Exception: " << exc.what());
}
catch (...)
{
LOG_FTL("QueueHandler::run: Unknown exception");
}
LOG_DBG("Thread finished.");
}
/// Return access to the lok::Document instance.
std::shared_ptr<lok::Document> getLOKitDocument() override
{
if (!_loKitDocument)
{
LOG_ERR("Document [" << _docKey << "] is not loaded.");
throw std::runtime_error("Document " + _docKey + " is not loaded.");
}
return _loKitDocument;
}
/// Return access to the lok::Document instance.
std::mutex& getDocumentMutex() override
{
return _documentMutex;
}
private:
std::shared_ptr<lok::Office> _loKit;
const std::string _jailId;
/// URL-based key. May be repeated during the lifetime of WSD.
const std::string _docKey;
/// Short numerical ID. Unique during the lifetime of WSD.
const std::string _docId;
const std::string _url;
std::string _jailedUrl;
std::string _renderOpts;
std::shared_ptr<lok::Document> _loKitDocument;
std::shared_ptr<TileQueue> _tileQueue;
std::shared_ptr<LOOLWebSocket> _ws;
PngCache _pngCache;
// Document password provided
std::string _docPassword;
// Whether password was provided or not
bool _haveDocPassword;
// Whether document is password protected
bool _isDocPasswordProtected;
// Whether password is required to view the document, or modify it
PasswordType _docPasswordType;
// Document watermark
std::unique_ptr<Watermark> _docWatermark;
std::atomic<bool> _stop;
mutable std::mutex _mutex;
/// Mutex guarding the lok::Document so that we can lock operations
/// like setting a view followed by a tile render, etc.
std::mutex _documentMutex;
std::condition_variable _cvLoading;
std::atomic_size_t _isLoading;
int _editorId;
bool _editorChangeWarning;
std::map<int, std::unique_ptr<CallbackDescriptor>> _viewIdToCallbackDescr;
std::map<std::string, std::shared_ptr<ChildSession>> _sessions;
std::map<int, std::chrono::steady_clock::time_point> _lastUpdatedAt;
std::map<int, int> _speedCount;
/// For showing disconnected user info in the doc repair dialog.
std::map<int, UserInfo> _sessionUserInfo;
Poco::Thread _callbackThread;
};
void documentViewCallback(const int type, const char* payload, void* data)
{
Document::ViewCallback(type, payload, data);
}
#ifndef BUILDING_TESTS
void lokit_main(const std::string& childRoot,
const std::string& jailId,
const std::string& sysTemplate,
const std::string& loTemplate,
const std::string& loSubPath,
bool noCapabilities,
bool queryVersion,
bool displayVersion)
{
#ifndef FUZZER
SigUtil::setFatalSignals();
SigUtil::setTerminationSignals();
#endif
Util::setThreadName("loolkit");
// Reinitialize logging when forked.
const bool logToFile = std::getenv("LOOL_LOGFILE");
const char* logFilename = std::getenv("LOOL_LOGFILENAME");
const char* logLevel = std::getenv("LOOL_LOGLEVEL");
const char* logColor = std::getenv("LOOL_LOGCOLOR");
std::map<std::string, std::string> logProperties;
if (logToFile && logFilename)
{
logProperties["path"] = std::string(logFilename);
}
Log::initialize("kit", logLevel ? logLevel : "", logColor != nullptr, logToFile, logProperties);
Util::rng::reseed();
assert(!childRoot.empty());
assert(!sysTemplate.empty());
assert(!loTemplate.empty());
assert(!loSubPath.empty());
LOG_DBG("Process started.");
std::string userdir_url;
std::string instdir_path;
// lokit's destroy typically throws from
// framework/source/services/modulemanager.cxx:198
// So we insure it lives until std::_Exit is called.
std::shared_ptr<lok::Office> loKit;
Path jailPath;
bool bRunInsideJail = !noCapabilities;
try
{
jailPath = Path::forDirectory(childRoot + "/" + jailId);
LOG_INF("Jail path: " << jailPath.toString());
File(jailPath).createDirectories();
if (bRunInsideJail)
{
userdir_url = "file:///user";
instdir_path = "/" + loSubPath + "/program";
// Create a symlink inside the jailPath so that the absolute pathname loTemplate, when
// interpreted inside a chroot at jailPath, points to loSubPath (relative to the chroot).
symlinkPathToJail(jailPath, loTemplate, loSubPath);
// Font paths can end up as realpaths so match that too.
char *resolved = realpath(loTemplate.c_str(), nullptr);
if (resolved)
{
if (strcmp(loTemplate.c_str(), resolved) != 0)
symlinkPathToJail(jailPath, std::string(resolved), loSubPath);
free (resolved);
}
Path jailLOInstallation(jailPath, loSubPath);
jailLOInstallation.makeDirectory();
File(jailLOInstallation).createDirectory();
// Copy (link) LO installation and other necessary files into it from the template.
bool bLoopMounted = false;
if (std::getenv("LOOL_BIND_MOUNT"))
{
Path usrSrcPath(sysTemplate, "usr");
Path usrDestPath(jailPath, "usr");
File(usrDestPath).createDirectory();
std::string mountCommand =
std::string("loolmount ") +
usrSrcPath.toString() +
std::string(" ") +
usrDestPath.toString();
LOG_DBG("Initializing jail bind mount.");
bLoopMounted = !system(mountCommand.c_str());
LOG_DBG("Initialized jail bind mount.");
}
linkOrCopy(sysTemplate, jailPath,
bLoopMounted ? LinkOrCopyType::NoUsr : LinkOrCopyType::All);
linkOrCopy(loTemplate, jailLOInstallation, LinkOrCopyType::LO);
// We need this because sometimes the hostname is not resolved
const auto networkFiles = {"/etc/host.conf", "/etc/hosts", "/etc/nsswitch.conf", "/etc/resolv.conf"};
for (const auto& filename : networkFiles)
{
const auto etcPath = Path(jailPath, filename);
const auto etcPathString = etcPath.toString();
if (File(filename).exists() && !File(etcPathString).exists() )
{
linkOrCopy( filename, etcPath, LinkOrCopyType::LO );
}
}
LOG_DBG("Initialized jail files.");
// Create the urandom and random devices
File(Path(jailPath, "/dev")).createDirectory();
if (mknod((jailPath.toString() + "/dev/random").c_str(),
S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH,
makedev(1, 8)) != 0)
{
LOG_SYS("mknod(" << jailPath.toString() << "/dev/random) failed.");
}
if (mknod((jailPath.toString() + "/dev/urandom").c_str(),
S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH,
makedev(1, 9)) != 0)
{
LOG_SYS("mknod(" << jailPath.toString() << "/dev/urandom) failed.");
}
ProcSMapsFile = fopen("/proc/self/smaps", "r");
if (ProcSMapsFile == nullptr)
{
LOG_SYS("Failed to symlink /proc/self/smaps. Memory stats will be missing.");
}
LOG_INF("chroot(\"" << jailPath.toString() << "\")");
if (chroot(jailPath.toString().c_str()) == -1)
{
LOG_SYS("chroot(\"" << jailPath.toString() << "\") failed.");
std::_Exit(Application::EXIT_SOFTWARE);
}
if (chdir("/") == -1)
{
LOG_SYS("chdir(\"/\") in jail failed.");
std::_Exit(Application::EXIT_SOFTWARE);
}
dropCapability(CAP_SYS_CHROOT);
dropCapability(CAP_MKNOD);
dropCapability(CAP_FOWNER);
LOG_DBG("Initialized jail nodes, dropped caps.");
}
else // noCapabilities set
{
LOG_INF("Using template " << loTemplate << " as install subpath - skipping jail setup");
userdir_url = "file:///" + jailPath.toString() + "/user";
instdir_path = "/" + loTemplate + "/program";
}
{
const char *instdir = instdir_path.c_str();
const char *userdir = userdir_url.c_str();
#ifndef KIT_IN_PROCESS
LibreOfficeKit* kit = UnitKit::get().lok_init(instdir, userdir);
#else
LibreOfficeKit* kit = nullptr;
#ifdef FUZZER
if (LOOLWSD::DummyLOK)
kit = dummy_lok_init_2(instdir, userdir);
#endif
#endif
if (!kit)
{
kit = (initFunction ? initFunction(instdir, userdir) : lok_init_2(instdir, userdir));
}
loKit = std::make_shared<lok::Office>(kit);
if (!loKit)
{
LOG_FTL("LibreOfficeKit initialization failed. Exiting.");
std::_Exit(Application::EXIT_SOFTWARE);
}
}
// Lock down the syscalls that can be used
if (!Seccomp::lockdown(Seccomp::Type::KIT))
{
LOG_ERR("LibreOfficeKit security lockdown failed. Exiting.");
std::_Exit(Application::EXIT_SOFTWARE);
}
rlimit rlim = { 0, 0 };
if (getrlimit(RLIMIT_AS, &rlim) == 0)
LOG_INF("RLIMIT_AS is " << rlim.rlim_max << " bytes.");
else
LOG_SYS("Failed to get RLIMIT_AS.");
if (getrlimit(RLIMIT_STACK, &rlim) == 0)
LOG_INF("RLIMIT_STACK is " << rlim.rlim_max << " bytes.");
else
LOG_SYS("Failed to get RLIMIT_STACK.");
if (getrlimit(RLIMIT_FSIZE, &rlim) == 0)
LOG_INF("RLIMIT_FSIZE is " << rlim.rlim_max << " bytes.");
else
LOG_SYS("Failed to get RLIMIT_FSIZE.");
if (getrlimit(RLIMIT_NOFILE, &rlim) == 0)
LOG_INF("RLIMIT_NOFILE is " << rlim.rlim_max << " files.");
else
LOG_SYS("Failed to get RLIMIT_NOFILE.");
assert(loKit);
LOG_INF("Process is ready.");
static const std::string pid = std::to_string(Process::id());
std::string requestUrl = NEW_CHILD_URI;
requestUrl += "pid=" + pid + "&jailid=" + jailId;
if (queryVersion)
{
char* versionInfo = loKit->getVersionInfo();
std::string versionString(versionInfo);
if (displayVersion)
std::cout << "office version details: " << versionString << std::endl;
std::string encodedVersionStr;
URI::encode(versionString, "", encodedVersionStr);
requestUrl += "&version=" + encodedVersionStr;
free(versionInfo);
}
// Open websocket connection between the child process and WSD.
HTTPClientSession cs("127.0.0.1", MasterPortNumber);
cs.setTimeout(Poco::Timespan(10, 0)); // 10 second
LOG_DBG("Connecting to Master " << cs.getHost() << ':' << cs.getPort());
HTTPRequest request(HTTPRequest::HTTP_GET, requestUrl);
HTTPResponse response;
auto ws = std::make_shared<LOOLWebSocket>(cs, request, response);
ws->setReceiveTimeout(0);
auto queue = std::make_shared<TileQueue>();
const std::string socketName = "child_ws_" + pid;
IoUtil::SocketProcessor(ws, socketName,
[&socketName, &ws, &loKit, &jailId, &queue](const std::vector<char>& data)
{
std::string message(data.data(), data.size());
#ifndef KIT_IN_PROCESS
if (UnitKit::get().filterKitMessage(ws, message))
{
return true;
}
#endif
LOG_DBG(socketName << ": recv [" << LOOLProtocol::getAbbreviatedMessage(message) << "].");
std::vector<std::string> tokens = LOOLProtocol::tokenize(message);
// Note: Syntax or parsing errors here are unexpected and fatal.
if (TerminationFlag)
{
LOG_DBG("Too late, we're going down");
}
else if (tokens[0] == "session")
{
const std::string& sessionId = tokens[1];
const std::string& docKey = tokens[2];
const std::string& docId = tokens[3];
std::string url;
URI::decode(docKey, url);
LOG_INF("New session [" << sessionId << "] request on url [" << url << "].");
if (!document)
{
document = std::make_shared<Document>(loKit, jailId, docKey, docId, url, queue, ws);
}
// Validate and create session.
if (!(url == document->getUrl() &&
document->createSession(sessionId)))
{
LOG_DBG("CreateSession failed.");
}
}
else if (tokens[0] == "exit")
{
LOG_TRC("Setting TerminationFlag due to 'exit' command from parent.");
TerminationFlag = true;
}
else if (tokens[0] == "tile" || tokens[0] == "tilecombine" || tokens[0] == "canceltiles" ||
tokens[0] == "dialog" || tokens[0] == "dialogchild" ||
LOOLProtocol::getFirstToken(tokens[0], '-') == "child")
{
if (document)
{
queue->put(message);
}
else
{
LOG_WRN("No document while processing " << tokens[0] << " request.");
}
}
else if (tokens.size() == 3 && tokens[0] == "setconfig")
{
// Currently onlly rlimit entries are supported.
if (!Rlimit::handleSetrlimitCommand(tokens))
{
LOG_ERR("Unknown setconfig command: " << message);
}
}
else
{
LOG_ERR("Bad or unknown token [" << tokens[0] << "]");
}
return true;
},
[]() {},
[]()
{
if (document && document->purgeSessions() == 0)
{
LOG_INF("Last session discarded. Terminating.");
TerminationFlag = true;
}
return TerminationFlag.load();
});
#if 0
std::string uri = "file://$HOME/docs/basic-presentation.pptx";
std::shared_ptr<lok::Document> loKitDoc;
const auto flags = LOK_FEATURE_DOCUMENT_PASSWORD
| LOK_FEATURE_DOCUMENT_PASSWORD_TO_MODIFY
| LOK_FEATURE_PART_IN_INVALIDATION_CALLBACK
| LOK_FEATURE_NO_TILED_ANNOTATIONS;
loKit->setOptionalFeatures(flags);
loKitDoc.reset(loKit->documentLoad(uri.c_str()));
if (!loKitDoc || !loKitDoc->get())
{
LOG_ERR("Failed to load: " << uri << ", error: " << loKit->getError());
std::_Exit(Application::EXIT_OK);
}
// specific case to debug
// ...
#endif
// Let forkit handle the jail cleanup.
}
catch (const Exception& exc)
{
LOG_ERR("Poco Exception: " << exc.displayText() <<
(exc.nested() ? " (" + exc.nested()->displayText() + ")" : ""));
}
catch (const std::exception& exc)
{
LOG_ERR("Exception: " << exc.what());
}
// Trap the signal handler, if invoked,
// to prevent exiting.
LOG_INF("Process finished.");
std::unique_lock<std::mutex> lock(SigHandlerTrap);
std::_Exit(Application::EXIT_OK);
}
#endif
/// Initializes LibreOfficeKit for cross-fork re-use.
bool globalPreinit(const std::string &loTemplate)
{
#ifdef FUZZER
if (LOOLWSD::DummyLOK)
return true;
#endif
const std::string libSofficeapp = loTemplate + "/program/" LIB_SOFFICEAPP;
const std::string libMerged = loTemplate + "/program/" LIB_MERGED;
std::string loadedLibrary;
void *handle;
if (File(libMerged).exists())
{
LOG_TRC("dlopen(" << libMerged << ", RTLD_GLOBAL|RTLD_NOW)");
handle = dlopen(libMerged.c_str(), RTLD_GLOBAL|RTLD_NOW);
if (!handle)
{
LOG_FTL("Failed to load " << libMerged << ": " << dlerror());
return false;
}
loadedLibrary = libMerged;
}
else
{
if (File(libSofficeapp).exists())
{
LOG_TRC("dlopen(" << libSofficeapp << ", RTLD_GLOBAL|RTLD_NOW)");
handle = dlopen(libSofficeapp.c_str(), RTLD_GLOBAL|RTLD_NOW);
if (!handle)
{
LOG_FTL("Failed to load " << libSofficeapp << ": " << dlerror());
return false;
}
loadedLibrary = libSofficeapp;
}
else
{
LOG_FTL("Neither " << libSofficeapp << " or " << libMerged << " exist.");
return false;
}
}
LokHookPreInit* preInit = reinterpret_cast<LokHookPreInit *>(dlsym(handle, "lok_preinit"));
if (!preInit)
{
LOG_FTL("No lok_preinit symbol in " << loadedLibrary << ": " << dlerror());
return false;
}
initFunction = reinterpret_cast<LokHookFunction2 *>(dlsym(handle, "libreofficekit_hook_2"));
if (!initFunction)
{
LOG_FTL("No libreofficekit_hook_2 symbol in " << loadedLibrary << ": " << dlerror());
}
LOG_TRC("Invoking lok_preinit(" << loTemplate << "/program\", \"file:///user\")");
const auto start = std::chrono::steady_clock::now();
if (preInit((loTemplate + "/program").c_str(), "file:///user") != 0)
{
LOG_FTL("lok_preinit() in " << loadedLibrary << " failed");
return false;
}
LOG_TRC("Finished lok_preinit(" << loTemplate << "/program\", \"file:///user\") in " <<
std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::steady_clock::now() - start).count() <<
" ms.");
return true;
}
#if !defined(BUILDING_TESTS) && !defined(KIT_IN_PROCESS)
namespace Util
{
void alertAllUsers(const std::string& msg)
{
document->sendTextFrame(msg);
}
void alertAllUsers(const std::string& cmd, const std::string& kind)
{
alertAllUsers("errortoall: cmd=" + cmd + " kind=" + kind);
}
}
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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