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libreoffice-online/loolwsd/LOOLWSD.cpp
Ashod Nakashian 410123e2aa loolwsd: MasterProcessSession splitting: moved dispatchChild 
... and PrisonerSession ctor

Change-Id: I4c3707d71eb308ab739e5c264be1905453f9d719
Reviewed-on: https://gerrit.libreoffice.org/25047
Reviewed-by: Ashod Nakashian <ashnakash@gmail.com>
Tested-by: Ashod Nakashian <ashnakash@gmail.com>
2016-05-17 03:22:10 +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/.
*/
#include "config.h"
// This is the main source for the loolwsd program. LOOL uses several loolwsd processes: one main
// parent process that listens on the TCP port and accepts connections from LOOL clients, and a
// number of child processes, each which handles a viewing (editing) session for one document.
#include <errno.h>
#include <locale.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <time.h>
#include <cassert>
#include <condition_variable>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <map>
#include <mutex>
#include <sstream>
#include <thread>
#include <Poco/DOM/AutoPtr.h>
#include <Poco/DOM/DOMParser.h>
#include <Poco/DOM/DOMWriter.h>
#include <Poco/DOM/Document.h>
#include <Poco/DOM/Element.h>
#include <Poco/DOM/NodeList.h>
#include <Poco/Exception.h>
#include <Poco/File.h>
#include <Poco/FileStream.h>
#include <Poco/Net/AcceptCertificateHandler.h>
#include <Poco/Net/ConsoleCertificateHandler.h>
#include <Poco/Net/Context.h>
#include <Poco/Net/HTMLForm.h>
#include <Poco/Net/HTTPRequest.h>
#include <Poco/Net/HTTPRequestHandler.h>
#include <Poco/Net/HTTPRequestHandlerFactory.h>
#include <Poco/Net/HTTPServer.h>
#include <Poco/Net/HTTPServerParams.h>
#include <Poco/Net/HTTPServerRequest.h>
#include <Poco/Net/HTTPServerResponse.h>
#include <Poco/Net/InvalidCertificateHandler.h>
#include <Poco/Net/KeyConsoleHandler.h>
#include <Poco/Net/MessageHeader.h>
#include <Poco/Net/Net.h>
#include <Poco/Net/NetException.h>
#include <Poco/Net/PartHandler.h>
#include <Poco/Net/PrivateKeyPassphraseHandler.h>
#include <Poco/Net/SSLManager.h>
#include <Poco/Net/SecureServerSocket.h>
#include <Poco/Net/ServerSocket.h>
#include <Poco/Net/SocketAddress.h>
#include <Poco/Net/WebSocket.h>
#include <Poco/Path.h>
#include <Poco/Process.h>
#include <Poco/SAX/InputSource.h>
#include <Poco/StreamCopier.h>
#include <Poco/StringTokenizer.h>
#include <Poco/TemporaryFile.h>
#include <Poco/ThreadPool.h>
#include <Poco/URI.h>
#include <Poco/Util/HelpFormatter.h>
#include <Poco/Util/Option.h>
#include <Poco/Util/OptionException.h>
#include <Poco/Util/OptionSet.h>
#include <Poco/Util/ServerApplication.h>
#include "Admin.hpp"
#include "Auth.hpp"
#include "Common.hpp"
#include "Exceptions.hpp"
#include "FileServer.hpp"
#include "IoUtil.hpp"
#include "LOOLProtocol.hpp"
#include "LOOLSession.hpp"
#include "LOOLWSD.hpp"
#include "ClientSession.hpp"
#include "PrisonerSession.hpp"
#include "MasterProcessSession.hpp"
#include "QueueHandler.hpp"
#include "Storage.hpp"
#include "UserMessages.hpp"
#include "Util.hpp"
#include "Unit.hpp"
#include "UnitHTTP.hpp"
using namespace LOOLProtocol;
using Poco::Exception;
using Poco::File;
using Poco::Net::HTMLForm;
using Poco::Net::HTTPRequest;
using Poco::Net::HTTPRequestHandler;
using Poco::Net::HTTPRequestHandlerFactory;
using Poco::Net::HTTPResponse;
using Poco::Net::HTTPServer;
using Poco::Net::HTTPServerParams;
using Poco::Net::HTTPServerRequest;
using Poco::Net::HTTPServerResponse;
using Poco::Net::MessageHeader;
using Poco::Net::NameValueCollection;
using Poco::Net::PartHandler;
using Poco::Net::SecureServerSocket;
using Poco::Net::ServerSocket;
using Poco::Net::SocketAddress;
using Poco::Net::WebSocket;
using Poco::Path;
using Poco::Process;
using Poco::ProcessHandle;
using Poco::StreamCopier;
using Poco::StringTokenizer;
using Poco::TemporaryFile;
using Poco::Thread;
using Poco::ThreadPool;
using Poco::URI;
using Poco::Util::Application;
using Poco::Util::HelpFormatter;
using Poco::Util::IncompatibleOptionsException;
using Poco::Util::MissingOptionException;
using Poco::Util::Option;
using Poco::Util::OptionSet;
using Poco::Util::ServerApplication;
using Poco::XML::AutoPtr;
using Poco::XML::DOMParser;
using Poco::XML::DOMWriter;
using Poco::XML::Element;
using Poco::XML::InputSource;
using Poco::XML::NodeList;
int ClientPortNumber = DEFAULT_CLIENT_PORT_NUMBER;
int MasterPortNumber = DEFAULT_MASTER_PORT_NUMBER;
/// New LOK child processes ready to host documents.
//TODO: Move to a more sensible namespace.
static bool DisplayVersion = false;
static bool NoCapsForKit = false;
static std::vector<std::shared_ptr<ChildProcess>> newChildren;
static std::mutex newChildrenMutex;
static std::condition_variable newChildrenCV;
static std::chrono::steady_clock::time_point lastForkRequestTime = std::chrono::steady_clock::now();
static std::map<std::string, std::shared_ptr<DocumentBroker>> docBrokers;
static std::mutex docBrokersMutex;
// Sessions to pre-spawned child processes that have connected but are not yet assigned a
// document to work on.
static std::mutex AvailableChildSessionMutex;
static std::condition_variable AvailableChildSessionCV;
static std::map<std::string, std::shared_ptr<PrisonerSession>> AvailableChildSessions;
#if ENABLE_DEBUG
static int careerSpanSeconds = 0;
#endif
static void forkChildren(const int number)
{
Util::assertIsLocked(newChildrenMutex);
if (number > 0)
{
const std::string aMessage = "spawn " + std::to_string(number) + "\n";
Log::debug("MasterToForKit: " + aMessage.substr(0, aMessage.length() - 1));
IoUtil::writeFIFO(LOOLWSD::ForKitWritePipe, aMessage);
lastForkRequestTime = std::chrono::steady_clock::now();
}
}
/// Called on startup only.
static void preForkChildren()
{
std::unique_lock<std::mutex> lock(newChildrenMutex);
int numPreSpawn = LOOLWSD::NumPreSpawnedChildren;
UnitWSD::get().preSpawnCount(numPreSpawn);
--numPreSpawn; // ForKit always spawns one child at startup.
forkChildren(numPreSpawn);
}
static void prespawnChildren()
{
std::unique_lock<std::mutex> lock(newChildrenMutex, std::defer_lock);
if (!lock.try_lock())
{
// We are forking already? Try later.
return;
}
// Do the cleanup first.
for (int i = newChildren.size() - 1; i >= 0; --i)
{
if (!newChildren[i]->isAlive())
{
newChildren.erase(newChildren.begin() + i);
}
}
const auto duration = (std::chrono::steady_clock::now() - lastForkRequestTime);
if (std::chrono::duration_cast<std::chrono::milliseconds>(duration).count() <= CHILD_TIMEOUT_SECS * 1000)
{
// Not enough time passed to balance children.
return;
}
const int available = newChildren.size();
int balance = LOOLWSD::NumPreSpawnedChildren;
balance -= available;
forkChildren(balance);
}
static size_t addNewChild(const std::shared_ptr<ChildProcess>& child)
{
std::unique_lock<std::mutex> lock(newChildrenMutex);
newChildren.emplace_back(child);
const auto count = newChildren.size();
Log::info() << "Have " << count << " "
<< (count == 1 ? "child" : "children")
<< "." << Log::end;
newChildrenCV.notify_one();
return count;
}
static std::shared_ptr<ChildProcess> getNewChild()
{
std::unique_lock<std::mutex> lock(newChildrenMutex);
namespace chrono = std::chrono;
const auto startTime = chrono::steady_clock::now();
do
{
const int available = newChildren.size();
int balance = LOOLWSD::NumPreSpawnedChildren;
if (available == 0)
{
Log::error("getNewChild: No available child. Sending spawn request to forkit and failing.");
}
else
{
balance -= available - 1; // Minus the one we'll dispatch just now.
balance = std::max(balance, 0);
}
Log::debug("getNewChild: Have " + std::to_string(available) + " children, forking " + std::to_string(balance));
forkChildren(balance);
const auto timeout = chrono::milliseconds(CHILD_TIMEOUT_SECS * 1000);
if (newChildrenCV.wait_for(lock, timeout, [](){ return !newChildren.empty(); }))
{
auto child = newChildren.back();
newChildren.pop_back();
// Validate before returning.
if (child && child->isAlive())
{
Log::debug("getNewChild: Returning new child [" + std::to_string(child->getPid()) + "].");
return child;
}
}
Log::debug("getNewChild: No live child, forking more.");
}
while (chrono::duration_cast<chrono::milliseconds>(chrono::steady_clock::now() - startTime).count() < CHILD_TIMEOUT_SECS * 4000);
Log::debug("getNewChild: Timed out while waiting for new child.");
return nullptr;
}
/// Handles the filename part of the convert-to POST request payload.
class ConvertToPartHandler : public PartHandler
{
std::string& _filename;
public:
ConvertToPartHandler(std::string& filename)
: _filename(filename)
{
}
virtual void handlePart(const MessageHeader& header, std::istream& stream) override
{
// Extract filename and put it to a temporary directory.
std::string disp;
NameValueCollection params;
if (header.has("Content-Disposition"))
{
std::string cd = header.get("Content-Disposition");
MessageHeader::splitParameters(cd, disp, params);
}
if (!params.has("filename"))
return;
Path tempPath = Path::forDirectory(TemporaryFile().tempName() + "/");
File(tempPath).createDirectories();
tempPath.setFileName(params.get("filename"));
_filename = tempPath.toString();
// Copy the stream to _filename.
std::ofstream fileStream;
fileStream.open(_filename);
StreamCopier::copyStream(stream, fileStream);
fileStream.close();
}
};
/// Handle a public connection from a client.
class ClientRequestHandler: public HTTPRequestHandler
{
private:
static void waitBridgeCompleted(const std::shared_ptr<MasterProcessSession>& session)
{
bool isFound = false;
std::unique_lock<std::mutex> lock(AvailableChildSessionMutex);
Log::debug() << "Waiting for client session [" << session->getId() << "] to connect." << Log::end;
AvailableChildSessionCV.wait_for(
lock,
std::chrono::milliseconds(COMMAND_TIMEOUT_MS),
[&isFound, &session]
{
return (isFound = AvailableChildSessions.find(session->getId()) != AvailableChildSessions.end());
});
if (!isFound)
{
// Let the client know we can't serve now.
Log::error(session->getName() + ": Failed to connect to lokit process. Client cannot serve now.");
throw WebSocketErrorMessageException(SERVICE_UNAVALABLE_INTERNAL_ERROR);
}
Log::debug("Waiting child session permission, done!");
AvailableChildSessions.erase(session->getId());
}
/// Handle POST requests.
/// Always throw on error, do not set response status here.
/// Returns true if a response has been sent.
static bool handlePostRequest(HTTPServerRequest& request, HTTPServerResponse& response, const std::string& id)
{
Log::info("Post request: [" + request.getURI() + "]");
StringTokenizer tokens(request.getURI(), "/?");
if (tokens.count() >= 2 && tokens[1] == "convert-to")
{
std::string fromPath;
ConvertToPartHandler handler(fromPath);
HTMLForm form(request, request.stream(), handler);
const std::string format = (form.has("format") ? form.get("format") : "");
bool sent = false;
if (!fromPath.empty())
{
if (!format.empty())
{
Log::info("Conversion request for URI [" + fromPath + "].");
// Request a kit process for this doc.
auto child = getNewChild();
if (!child)
{
// Let the client know we can't serve now.
throw std::runtime_error("Failed to spawn lokit child.");
}
auto uriPublic = DocumentBroker::sanitizeURI(fromPath);
const auto docKey = DocumentBroker::getDocKey(uriPublic);
auto docBroker = std::make_shared<DocumentBroker>(uriPublic, docKey, LOOLWSD::ChildRoot, child);
// This lock could become a bottleneck.
// In that case, we can use a pool and index by publicPath.
std::unique_lock<std::mutex> lock(docBrokersMutex);
//FIXME: What if the same document is already open? Need a fake dockey here?
Log::debug("New DocumentBroker for docKey [" + docKey + "].");
docBrokers.emplace(docKey, docBroker);
// Load the document.
std::shared_ptr<WebSocket> ws;
auto session = std::make_shared<ClientSession>(id, ws, docBroker, nullptr);
// Request the child to connect to us and add this session.
auto sessionsCount = docBroker->addSession(session);
Log::trace(docKey + ", ws_sessions++: " + std::to_string(sessionsCount));
lock.unlock();
Log::trace(docKey + ", ws_sessions++: " + std::to_string(sessionsCount));
// Wait until the client has connected with a prison socket.
waitBridgeCompleted(session);
// Now the bridge between the client and kit processes is connected
// Let messages flow
std::string encodedFrom;
URI::encode(docBroker->getPublicUri().getPath(), "", encodedFrom);
const std::string load = "load url=" + encodedFrom;
session->handleInput(load.data(), load.size());
// Convert it to the requested format.
Path toPath(docBroker->getPublicUri().getPath());
toPath.setExtension(format);
const std::string toJailURL = "file://" + std::string(JAILED_DOCUMENT_ROOT) + toPath.getFileName();
std::string encodedTo;
URI::encode(toJailURL, "", encodedTo);
std::string saveas = "saveas url=" + encodedTo + " format=" + format + " options=";
session->handleInput(saveas.data(), saveas.size());
// Send it back to the client.
//TODO: Should have timeout to avoid waiting forever.
Poco::URI resultURL(session->getSaveAsUrl());
if (!resultURL.getPath().empty())
{
const std::string mimeType = "application/octet-stream";
response.sendFile(resultURL.getPath(), mimeType);
sent = true;
}
lock.lock();
sessionsCount = docBroker->removeSession(id);
if (sessionsCount == 0)
{
Log::debug("Removing DocumentBroker for docKey [" + docKey + "].");
docBrokers.erase(docKey);
}
}
// Clean up the temporary directory the HTMLForm ctor created.
Path tempDirectory(fromPath);
tempDirectory.setFileName("");
Util::removeFile(tempDirectory, /*recursive=*/true);
}
if (!sent)
{
//TODO: We should differentiate between bad request and failed conversion.
throw BadRequestException("Failed to convert and send file.");
}
return true;
}
else if (tokens.count() >= 2 && tokens[1] == "insertfile")
{
Log::info("Insert file request.");
response.set("Access-Control-Allow-Origin", "*");
response.set("Access-Control-Allow-Methods", "GET, POST, OPTIONS");
response.set("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
std::string tmpPath;
ConvertToPartHandler handler(tmpPath);
HTMLForm form(request, request.stream(), handler);
if (form.has("childid") && form.has("name"))
{
const std::string formChildid(form.get("childid"));
const std::string formName(form.get("name"));
// protect against attempts to inject something funny here
if (formChildid.find('/') == std::string::npos && formName.find('/') == std::string::npos)
{
Log::info() << "Perform insertfile: " << formChildid << ", " << formName << Log::end;
const std::string dirPath = LOOLWSD::ChildRoot + formChildid
+ JAILED_DOCUMENT_ROOT + "insertfile";
File(dirPath).createDirectories();
std::string fileName = dirPath + "/" + form.get("name");
File(tmpPath).moveTo(fileName);
return false;
}
}
}
else if (tokens.count() >= 4)
{
Log::info("File download request.");
// The user might request a file to download
//TODO: Check that the user in question has access to this file!
const std::string dirPath = LOOLWSD::ChildRoot + tokens[1]
+ JAILED_DOCUMENT_ROOT + tokens[2];
std::string fileName;
URI::decode(tokens[3], fileName);
const std::string filePath = dirPath + "/" + fileName;
Log::info("HTTP request for: " + filePath);
File file(filePath);
if (file.exists())
{
response.set("Access-Control-Allow-Origin", "*");
HTMLForm form(request);
const std::string mimeType = form.has("mime_type")
? form.get("mime_type")
: "application/octet-stream";
response.sendFile(filePath, mimeType);
//TODO: Cleanup on error.
Util::removeFile(dirPath, true);
return true;
}
}
throw BadRequestException("Invalid or unknown request.");
}
/// Handle GET requests.
static void handleGetRequest(HTTPServerRequest& request, std::shared_ptr<WebSocket>& ws, const std::string& id)
{
Log::info("Starting GET request handler for session [" + id + "].");
// indicator to the client that document broker is searching
std::string status("statusindicator: find");
Log::trace("Sending to Client [" + status + "].");
ws->sendFrame(status.data(), (int) status.size());
// Remove the leading '/' in the GET URL.
std::string uri = request.getURI();
if (uri.size() > 0 && uri[0] == '/')
{
uri.erase(0, 1);
}
const auto uriPublic = DocumentBroker::sanitizeURI(uri);
const auto docKey = DocumentBroker::getDocKey(uriPublic);
std::shared_ptr<DocumentBroker> docBroker;
// scope the docBrokersLock
{
std::unique_lock<std::mutex> docBrokersLock(docBrokersMutex);
// Lookup this document.
auto it = docBrokers.find(docKey);
if (it != docBrokers.end())
{
// Get the DocumentBroker from the Cache.
Log::debug("Found DocumentBroker for docKey [" + docKey + "].");
docBroker = it->second;
assert(docBroker);
}
}
if (docBroker)
{
// If this document is going out, wait.
if (docBroker->isMarkedToDestroy())
{
Log::debug("Document [" + docKey + "] is marked to destroy, waiting to reload.");
const auto timeout = POLL_TIMEOUT_MS / 2;
for (size_t i = 0; i < COMMAND_TIMEOUT_MS / timeout; ++i)
{
std::this_thread::sleep_for(std::chrono::milliseconds(timeout));
std::unique_lock<std::mutex> lock(docBrokersMutex);
if (docBrokers.find(docKey) == docBrokers.end())
{
docBroker.reset();
break;
}
}
if (docBroker)
{
// Still here, but marked to destroy. Proceed and hope to recover.
Log::error("Timed out while waiting for document to unload before loading.");
}
}
}
bool newDoc = false;
if (!docBroker)
{
newDoc = true;
// Request a kit process for this doc.
auto child = getNewChild();
if (!child)
{
// Let the client know we can't serve now.
Log::error("Failed to get new child. Service Unavailable.");
throw WebSocketErrorMessageException(SERVICE_UNAVALABLE_INTERNAL_ERROR);
}
// Set one we just created.
Log::debug("New DocumentBroker for docKey [" + docKey + "].");
docBroker = std::make_shared<DocumentBroker>(uriPublic, docKey, LOOLWSD::ChildRoot, child);
child->setDocumentBroker(docBroker);
}
// Validate the broker.
if (!docBroker || !docBroker->isAlive())
{
Log::error("DocBroker is invalid or child had SDS. Service Unavailable.");
if (!newDoc)
{
// Remove.
std::unique_lock<std::mutex> lock(docBrokersMutex);
docBrokers.erase(docKey);
}
throw WebSocketErrorMessageException(SERVICE_UNAVALABLE_INTERNAL_ERROR);
}
// Validate the URI and Storage before moving on.
docBroker->validate(uriPublic);
Log::debug("Validated [" + uriPublic.toString() + "].");
if (newDoc)
{
std::unique_lock<std::mutex> lock(docBrokersMutex);
docBrokers.emplace(docKey, docBroker);
}
// Above this point exceptions are safe and will auto-cleanup.
// Below this, we need to cleanup internal references.
std::shared_ptr<ClientSession> session;
try
{
// For ToClient sessions, we store incoming messages in a queue and have a separate
// thread to pump them. This is to empty the queue when we get a "canceltiles" message.
auto queue = std::make_shared<BasicTileQueue>();
session = std::make_shared<ClientSession>(id, ws, docBroker, queue);
// Request the child to connect to us and add this session.
auto sessionsCount = docBroker->addSession(session);
Log::trace(docKey + ", ws_sessions++: " + std::to_string(sessionsCount));
// indicator to a client that is waiting to connect to lokit process
status = "statusindicator: connect";
Log::trace("Sending to Client [" + status + "].");
ws->sendFrame(status.data(), (int) status.size());
// Wait until the client has connected with a prison socket.
waitBridgeCompleted(session);
// Now the bridge beetween the client and kit process is connected
// Let messages flow
status = "statusindicator: ready";
Log::trace("Sending to Client [" + status + "].");
ws->sendFrame(status.data(), (int) status.size());
QueueHandler handler(queue, session, "wsd_queue_" + session->getId());
Thread queueHandlerThread;
queueHandlerThread.start(handler);
IoUtil::SocketProcessor(ws,
[&queue](const std::vector<char>& payload)
{
queue->put(payload);
return true;
},
[&session]() { session->closeFrame(); },
[&queueHandlerThread]() { return TerminationFlag || !queueHandlerThread.isRunning(); });
{
std::unique_lock<std::mutex> docBrokersLock(docBrokersMutex);
// We can destory if this is the last session.
// If not, we have to remove the session and check again.
// Otherwise, we may end up removing the one and only session.
bool removedSession = false;
auto canDestroy = docBroker->canDestroy();
sessionsCount = docBroker->getSessionsCount();
if (sessionsCount > 1)
{
sessionsCount = docBroker->removeSession(id);
removedSession = true;
Log::trace(docKey + ", ws_sessions--: " + std::to_string(sessionsCount));
canDestroy = docBroker->canDestroy();
}
// If we are the last, we must wait for the save to complete.
if (canDestroy)
{
Log::info("Shutdown of the last session, saving the document before tearing down.");
}
// We need to wait until the save notification reaches us
// and Storage persists the document.
if (!docBroker->autoSave(canDestroy, COMMAND_TIMEOUT_MS))
{
Log::error("Auto-save before closing failed.");
}
if (!removedSession)
{
sessionsCount = docBroker->removeSession(id);
Log::trace(docKey + ", ws_sessions--: " + std::to_string(sessionsCount));
}
}
if (session->isLoadFailed())
{
Log::info("Clearing the queue.");
queue->clear();
}
if (sessionsCount == 0)
{
std::unique_lock<std::mutex> docBrokersLock(docBrokersMutex);
Log::debug("Removing DocumentBroker for docKey [" + docKey + "].");
docBrokers.erase(docKey);
Log::info("Removing complete doc [" + docKey + "] from Admin.");
Admin::instance().rmDoc(docKey);
}
Log::info("Finishing GET request handler for session [" + id + "]. Joining the queue.");
queue->put("eof");
queueHandlerThread.join();
}
catch (const std::exception& exc)
{
Log::error("Error in client request handler: " + std::string(exc.what()));
}
if (session->isCloseFrame())
{
Log::trace("Normal close handshake.");
if (session->shutdownPeer(WebSocket::WS_NORMAL_CLOSE, ""))
{
// Client initiated close handshake
// respond close frame
ws->shutdown();
}
}
else
{
// something wrong, with internal exceptions
Log::trace("Abnormal close handshake.");
session->closeFrame();
ws->shutdown(WebSocket::WS_ENDPOINT_GOING_AWAY, SERVICE_UNAVALABLE_INTERNAL_ERROR);
session->shutdownPeer(WebSocket::WS_ENDPOINT_GOING_AWAY, SERVICE_UNAVALABLE_INTERNAL_ERROR);
}
}
/// Sends back the WOPI Discovery XML.
/// The XML needs to be preprocessed to stamp the correct URL etc.
/// Returns true if a response has been sent.
static bool handleGetWOPIDiscovery(HTTPServerRequest& request, HTTPServerResponse& response)
{
std::string discoveryPath = Path(Application::instance().commandPath()).parent().toString() + "discovery.xml";
if (!File(discoveryPath).exists())
{
discoveryPath = LOOLWSD_DATADIR "/discovery.xml";
}
const std::string mediaType = "text/xml";
const std::string action = "action";
const std::string urlsrc = "urlsrc";
const auto& config = Application::instance().config();
const std::string loleafletHtml = config.getString("loleaflet_html", "loleaflet.html");
const std::string uriValue = (LOOLWSD::SSLEnabled ? "https://" : "http://") +
(LOOLWSD::ServerName.empty() ? request.getHost() : LOOLWSD::ServerName) +
"/loleaflet/" LOOLWSD_VERSION_HASH "/" + loleafletHtml + "?";
InputSource inputSrc(discoveryPath);
DOMParser parser;
AutoPtr<Poco::XML::Document> docXML = parser.parse(&inputSrc);
AutoPtr<NodeList> listNodes = docXML->getElementsByTagName(action);
for (unsigned long it = 0; it < listNodes->length(); ++it)
{
static_cast<Element*>(listNodes->item(it))->setAttribute(urlsrc, uriValue);
}
std::ostringstream ostrXML;
DOMWriter writer;
writer.writeNode(ostrXML, docXML);
response.set("User-Agent", "LOOLWSD WOPI Agent");
response.setContentLength(ostrXML.str().length());
response.setContentType(mediaType);
response.setChunkedTransferEncoding(false);
std::ostream& ostr = response.send();
ostr << ostrXML.str();
Log::debug("Sent discovery.xml successfully.");
return true;
}
public:
void handleRequest(HTTPServerRequest& request, HTTPServerResponse& response) override
{
if (UnitWSD::get().filterHandleRequest(
UnitWSD::TestRequest::TEST_REQ_CLIENT,
request, response))
return;
handleClientRequest(request,response);
}
static void handleClientRequest(HTTPServerRequest& request, HTTPServerResponse& response)
{
const auto id = LOOLWSD::GenSessionId();
Util::setThreadName("client_ws_" + id);
Log::debug("Thread started.");
bool responded = false;
try
{
if (request.getMethod() == HTTPRequest::HTTP_GET && request.getURI() == "/hosting/discovery")
{
// http://server/hosting/discovery
responded = handleGetWOPIDiscovery(request, response);
}
else if (!(request.find("Upgrade") != request.end() && Poco::icompare(request["Upgrade"], "websocket") == 0))
{
responded = handlePostRequest(request, response, id);
}
else
{
auto ws = std::make_shared<WebSocket>(request, response);
try
{
responded = true; // After upgrading to WS we should not set HTTP response.
handleGetRequest(request, ws, id);
}
catch (const WebSocketErrorMessageException& exc)
{
// Internal error that should be passed on to the client.
Log::error(std::string("ClientRequestHandler::handleRequest: WebSocketErrorMessageException: ") + exc.what());
try
{
const std::string msg = std::string("error: ") + exc.what();
ws->sendFrame(msg.data(), msg.size());
// abnormal close frame handshake
ws->shutdown(WebSocket::WS_ENDPOINT_GOING_AWAY, msg);
}
catch (const std::exception& exc2)
{
Log::error(std::string("ClientRequestHandler::handleRequest: exception while sending WS error message: ") + exc2.what());
}
}
}
}
catch (const Exception& exc)
{
Log::error() << "ClientRequestHandler::handleRequest: PocoException: " << exc.displayText()
<< (exc.nested() ? " (" + exc.nested()->displayText() + ")" : "")
<< Log::end;
response.setStatusAndReason(HTTPResponse::HTTP_SERVICE_UNAVAILABLE);
}
catch (const UnauthorizedRequestException& exc)
{
Log::error(std::string("ClientRequestHandler::handleRequest: UnauthorizedException: ") + exc.what());
response.setStatusAndReason(HTTPResponse::HTTP_UNAUTHORIZED);
}
catch (const BadRequestException& exc)
{
Log::error(std::string("ClientRequestHandler::handleRequest: BadRequestException: ") + exc.what());
response.setStatusAndReason(HTTPResponse::HTTP_BAD_REQUEST);
}
catch (const std::exception& exc)
{
Log::error(std::string("ClientRequestHandler::handleRequest: Exception: ") + exc.what());
response.setStatusAndReason(HTTPResponse::HTTP_SERVICE_UNAVAILABLE);
}
catch (...)
{
Log::error("ClientRequestHandler::handleRequest:: Unexpected exception");
}
if (!responded)
{
response.setContentLength(0);
response.send();
}
Log::debug("Thread finished.");
}
};
/// Handle requests from prisoners (internal).
class PrisonerRequestHandler: public HTTPRequestHandler
{
public:
void handleRequest(HTTPServerRequest& request, HTTPServerResponse& response) override
{
if (UnitWSD::get().filterHandleRequest(
UnitWSD::TestRequest::TEST_REQ_PRISONER,
request, response))
return;
handlePrisonerRequest(request, response);
}
static void handlePrisonerRequest(HTTPServerRequest& request, HTTPServerResponse& response)
{
Util::setThreadName("prison_ws");
Log::debug("Child connection with URI [" + request.getURI() + "].");
assert(request.serverAddress().port() == MasterPortNumber);
if (request.getURI().find(NEW_CHILD_URI) == 0)
{
// New Child is spawned.
const auto params = Poco::URI(request.getURI()).getQueryParameters();
Poco::Process::PID pid = -1;
for (const auto& param : params)
{
if (param.first == "pid")
{
pid = std::stoi(param.second);
}
}
if (pid <= 0)
{
Log::error("Invalid PID in child URI [" + request.getURI() + "].");
return;
}
Log::info("New child [" + std::to_string(pid) + "].");
auto ws = std::make_shared<WebSocket>(request, response);
UnitWSD::get().newChild(ws);
addNewChild(std::make_shared<ChildProcess>(pid, ws));
return;
}
if (request.getURI().find(CHILD_URI) != 0)
{
Log::error("Invalid request URI: [" + request.getURI() + "].");
return;
}
std::string sessionId;
std::string jailId;
std::string docKey;
try
{
const auto params = Poco::URI(request.getURI()).getQueryParameters();
for (const auto& param : params)
{
if (param.first == "sessionId")
{
sessionId = param.second;
}
else if (param.first == "jailId")
{
jailId = param.second;
}
else if (param.first == "docKey")
{
docKey = param.second;
}
}
Util::setThreadName("prison_ws_" + sessionId);
// Misleading debug message, we obviously started already a while ago and have done lots
// of stuff already.
Log::debug("Thread started.");
Log::debug("Child socket for SessionId: " + sessionId + ", jailId: " + jailId +
", docKey: " + docKey + " connected.");
// Jail id should be the PID, beacuse Admin need it to calculate the memory
const Poco::Process::PID pid = std::stoi(jailId);
std::shared_ptr<DocumentBroker> docBroker;
{
// This lock could become a bottleneck.
// In that case, we can use a pool and index by publicPath.
std::unique_lock<std::mutex> lock(docBrokersMutex);
// Lookup this document.
auto it = docBrokers.find(docKey);
if (it != docBrokers.end())
{
// Get the DocumentBroker from the Cache.
docBroker = it->second;
assert(docBroker);
}
else
{
// The client closed before we started,
// or some early failure happened.
Log::error("Failed to find DocumentBroker for docKey [" + docKey +
"] while handling child connection for session [" + sessionId + "].");
throw std::runtime_error("Invalid docKey.");
}
}
docBroker->load(jailId);
auto ws = std::make_shared<WebSocket>(request, response);
auto session = std::make_shared<PrisonerSession>(sessionId, ws, docBroker);
// Connect the prison session to the client.
docBroker->connectPeers(session);
std::unique_lock<std::mutex> lock(AvailableChildSessionMutex);
AvailableChildSessions.emplace(sessionId, session);
Log::info() << " mapped " << session << " jailId=" << jailId << ", id=" << sessionId
<< " into _availableChildSessions, size=" << AvailableChildSessions.size() << Log::end;
lock.unlock();
AvailableChildSessionCV.notify_one();
Log::info("Adding doc " + docKey + " to Admin");
Admin::instance().addDoc(docKey, pid, docBroker->getFilename(), sessionId);
UnitWSD::get().onChildConnected(pid, sessionId);
IoUtil::SocketProcessor(ws,
[&session](const std::vector<char>& payload)
{
return session->handleInput(payload.data(), payload.size());
},
[&session]() { session->closeFrame(); },
[]() { return TerminationFlag; });
if (session->isCloseFrame())
{
Log::trace("Normal close handshake.");
if (session->shutdownPeer(WebSocket::WS_NORMAL_CLOSE, ""))
{
// LOKit initiated close handshake
// respond close frame
ws->shutdown();
}
}
else
{
// something wrong, with internal exceptions
Log::trace("Abnormal close handshake.");
session->closeFrame();
ws->shutdown(WebSocket::WS_ENDPOINT_GOING_AWAY, SERVICE_UNAVALABLE_INTERNAL_ERROR);
session->shutdownPeer(WebSocket::WS_ENDPOINT_GOING_AWAY, SERVICE_UNAVALABLE_INTERNAL_ERROR);
}
}
catch (const Exception& exc)
{
Log::error() << "PrisonerRequestHandler::handleRequest: Exception: " << exc.displayText()
<< (exc.nested() ? " (" + exc.nested()->displayText() + ")" : "")
<< Log::end;
}
catch (const std::exception& exc)
{
Log::error(std::string("PrisonerRequestHandler::handleRequest: Exception: ") + exc.what());
}
catch (...)
{
Log::error("PrisonerRequestHandler::handleRequest:: Unexpected exception");
}
if (!jailId.empty())
{
Log::info("Removing doc " + docKey + " from Admin");
Admin::instance().rmDoc(docKey, sessionId);
}
Log::debug("Thread finished.");
}
};
class ClientRequestHandlerFactory: public HTTPRequestHandlerFactory
{
public:
ClientRequestHandlerFactory(FileServer& fileServer)
: _fileServer(fileServer)
{ }
HTTPRequestHandler* createRequestHandler(const HTTPServerRequest& request) override
{
Util::setThreadName("client_req_hdl");
auto logger = Log::info();
logger << "Request from " << request.clientAddress().toString() << ": "
<< request.getMethod() << " " << request.getURI() << " "
<< request.getVersion();
for (const auto& it : request)
{
logger << " / " << it.first << ": " << it.second;
}
logger << Log::end;
// Routing
// FIXME: Some browsers (all?) hit for /favicon.ico. Create a nice favicon and add to routes
Poco::URI requestUri(request.getURI());
std::vector<std::string> reqPathSegs;
requestUri.getPathSegments(reqPathSegs);
HTTPRequestHandler* requestHandler;
// File server
if (reqPathSegs.size() >= 1 && reqPathSegs[0] == "loleaflet")
{
requestHandler = _fileServer.createRequestHandler();
}
// Admin WebSocket Connections
else if (reqPathSegs.size() >= 1 && reqPathSegs[0] == "adminws")
{
requestHandler = Admin::createRequestHandler();
}
// Client post and websocket connections
else
{
requestHandler = new ClientRequestHandler();
}
return requestHandler;
}
private:
FileServer& _fileServer;
};
class PrisonerRequestHandlerFactory: public HTTPRequestHandlerFactory
{
public:
HTTPRequestHandler* createRequestHandler(const HTTPServerRequest& request) override
{
Util::setThreadName("prsnr_req_hdl");
auto logger = Log::info();
logger << "Request from " << request.clientAddress().toString() << ": "
<< request.getMethod() << " " << request.getURI() << " "
<< request.getVersion();
for (const auto& it : request)
{
logger << " / " << it.first << ": " << it.second;
}
logger << Log::end;
return new PrisonerRequestHandler();
}
};
std::atomic<unsigned> LOOLWSD::NextSessionId;
int LOOLWSD::ForKitWritePipe = -1;
std::string LOOLWSD::Cache = LOOLWSD_CACHEDIR;
std::string LOOLWSD::SysTemplate;
std::string LOOLWSD::LoTemplate;
std::string LOOLWSD::ChildRoot;
std::string LOOLWSD::LoSubPath = "lo";
std::string LOOLWSD::ServerName;
std::string LOOLWSD::FileServerRoot;
std::string LOOLWSD::AdminCreds;
bool LOOLWSD::AllowLocalStorage = false;
bool LOOLWSD::SSLEnabled =
#if ENABLE_SSL
true;
#else
false;
#endif
static std::string UnitTestLibrary;
unsigned int LOOLWSD::NumPreSpawnedChildren = 0;
LOOLWSD::LOOLWSD()
{
}
LOOLWSD::~LOOLWSD()
{
}
void LOOLWSD::initialize(Application& self)
{
Log::initialize("wsd");
if (geteuid() == 0)
{
throw std::runtime_error("Do not run as root. Please run as lool user.");
}
if (!UnitWSD::init(UnitWSD::UnitType::TYPE_WSD,
UnitTestLibrary))
{
throw std::runtime_error("Failed to load wsd unit test library.");
}
// Load default configuration files, if present.
if (loadConfiguration() == 0)
{
// Fallback to the default path.
const std::string configPath = LOOLWSD_CONFIGDIR "/loolwsd.xml";
loadConfiguration(configPath);
}
// This overrides whatever is in the config file,
// which forces admins to set this flag on the command-line.
config().setBool("storage.filesystem[@allow]", AllowLocalStorage);
if (!AdminCreds.empty())
{
// Set the Admin Console credentials, if provided.
StringTokenizer tokens(AdminCreds, "/", StringTokenizer::TOK_IGNORE_EMPTY | StringTokenizer::TOK_TRIM);
if (tokens.count() == 2)
{
config().setString("admin_console_username", tokens[0]);
config().setString("admin_console_password", tokens[1]);
}
}
// Allow UT to manipulate before using configuration values.
UnitWSD::get().configure(config());
if (Cache.empty())
{
Cache = getPathFromConfig("tile_cache_path");
}
if (SysTemplate.empty())
{
SysTemplate = getPathFromConfig("sys_template_path");
}
if (LoTemplate.empty())
{
LoTemplate = getPathFromConfig("lo_template_path");
}
if (ChildRoot.empty())
{
ChildRoot = getPathFromConfig("child_root_path");
}
if (LoSubPath.empty())
{
LoSubPath = getPathFromConfig("lo_jail_subpath");
}
if (ServerName.empty())
{
ServerName = config().getString("server_name");
}
if (FileServerRoot.empty())
{
FileServerRoot = getPathFromConfig("file_server_root_path");
}
if (NumPreSpawnedChildren == 0)
{
// Default to 1 child.
NumPreSpawnedChildren = config().getUInt("num_prespawn_children", 1);
}
StorageBase::initialize();
ServerApplication::initialize(self);
}
#if ENABLE_SSL
void LOOLWSD::initializeSSL()
{
const auto ssl_cert_file_path = getPathFromConfig("ssl.cert_file_path");
Log::info("SSL Cert file: " + ssl_cert_file_path);
const auto ssl_key_file_path = getPathFromConfig("ssl.key_file_path");
Log::info("SSL Key file: " + ssl_key_file_path);
const auto ssl_ca_file_path = getPathFromConfig("ssl.ca_file_path");
Log::info("SSL CA file: " + ssl_ca_file_path);
Poco::Crypto::initializeCrypto();
Poco::Net::initializeSSL();
Poco::Net::Context::Params sslParams;
sslParams.certificateFile = ssl_cert_file_path;
sslParams.privateKeyFile = ssl_key_file_path;
sslParams.caLocation = ssl_ca_file_path;
// Don't ask clients for certificate
sslParams.verificationMode = Poco::Net::Context::VERIFY_NONE;
Poco::SharedPtr<Poco::Net::PrivateKeyPassphraseHandler> consoleHandler = new Poco::Net::KeyConsoleHandler(true);
Poco::SharedPtr<Poco::Net::InvalidCertificateHandler> invalidCertHandler = new Poco::Net::ConsoleCertificateHandler(true);
Poco::Net::Context::Ptr sslContext = new Poco::Net::Context(Poco::Net::Context::SERVER_USE, sslParams);
Poco::Net::SSLManager::instance().initializeServer(consoleHandler, invalidCertHandler, sslContext);
// Init client
Poco::Net::Context::Params sslClientParams;
// TODO: Be more strict and setup SSL key/certs for owncloud server and us
sslClientParams.verificationMode = Poco::Net::Context::VERIFY_NONE;
Poco::SharedPtr<Poco::Net::PrivateKeyPassphraseHandler> consoleClientHandler = new Poco::Net::KeyConsoleHandler(false);
Poco::SharedPtr<Poco::Net::InvalidCertificateHandler> invalidClientCertHandler = new Poco::Net::AcceptCertificateHandler(false);
Poco::Net::Context::Ptr sslClientContext = new Poco::Net::Context(Poco::Net::Context::CLIENT_USE, sslClientParams);
Poco::Net::SSLManager::instance().initializeClient(consoleClientHandler, invalidClientCertHandler, sslClientContext);
}
#endif
void LOOLWSD::uninitialize()
{
ServerApplication::uninitialize();
}
void LOOLWSD::defineOptions(OptionSet& optionSet)
{
ServerApplication::defineOptions(optionSet);
optionSet.addOption(Option("help", "", "Display help information on command line arguments.")
.required(false)
.repeatable(false));
optionSet.addOption(Option("version", "", "Display version information.")
.required(false)
.repeatable(false));
optionSet.addOption(Option("port", "", "Port number to listen to (default: " + std::to_string(DEFAULT_CLIENT_PORT_NUMBER) + "),"
" must not be " + std::to_string(MasterPortNumber) + ".")
.required(false)
.repeatable(false)
.argument("port number"));
optionSet.addOption(Option("cache", "", "Path to a directory where to keep the tile cache (default: " + std::string(LOOLWSD_CACHEDIR) + ").")
.required(false)
.repeatable(false)
.argument("directory"));
optionSet.addOption(Option("systemplate", "", "Path to a template tree with shared libraries etc to be used as source for chroot jails for child processes.")
.required(false)
.repeatable(false)
.argument("directory"));
optionSet.addOption(Option("lotemplate", "", "Path to a LibreOffice installation tree to be copied (linked) into the jails for child processes. Should be on the same file system as systemplate.")
.required(false)
.repeatable(false)
.argument("directory"));
optionSet.addOption(Option("childroot", "", "Path to the directory under which the chroot jails for the child processes will be created. Should be on the same file system as systemplate and lotemplate.")
.required(false)
.repeatable(false)
.argument("directory"));
optionSet.addOption(Option("losubpath", "", "Relative path where the LibreOffice installation will be copied inside a jail (default: '" + LoSubPath + "').")
.required(false)
.repeatable(false)
.argument("relative path"));
optionSet.addOption(Option("fileserverroot", "", "Path to the directory that should be considered root for the file server (default: '../loleaflet/').")
.required(false)
.repeatable(false)
.argument("directory"));
optionSet.addOption(Option("numprespawns", "", "Number of child processes to keep started in advance and waiting for new clients.")
.required(false)
.repeatable(false)
.argument("number"));
optionSet.addOption(Option("admincreds", "", "Admin 'username/password' used to access the admin console.")
.required(false)
.repeatable(false)
.argument("credentials"));
optionSet.addOption(Option("allowlocalstorage", "", "When true will allow highly insecure loading of files from local storage.")
.required(false)
.repeatable(false));
#if ENABLE_DEBUG
optionSet.addOption(Option("unitlib", "", "Unit testing library path.")
.required(false)
.repeatable(false)
.argument("unitlib"));
optionSet.addOption(Option("nocaps", "", "Use a non-privileged forkit for valgrinding.")
.required(false)
.repeatable(false));
optionSet.addOption(Option("careerspan", "", "How many seconds to run.")
.required(false)
.repeatable(false)
.argument("seconds"));
#endif
}
void LOOLWSD::handleOption(const std::string& optionName,
const std::string& value)
{
ServerApplication::handleOption(optionName, value);
if (optionName == "help")
{
displayHelp();
std::exit(Application::EXIT_OK);
}
else if (optionName == "version")
DisplayVersion = true;
else if (optionName == "port")
ClientPortNumber = std::stoi(value);
else if (optionName == "cache")
Cache = value;
else if (optionName == "systemplate")
SysTemplate = value;
else if (optionName == "lotemplate")
LoTemplate = value;
else if (optionName == "childroot")
ChildRoot = value;
else if (optionName == "losubpath")
LoSubPath = value;
else if (optionName == "fileserverroot")
FileServerRoot = value;
else if (optionName == "numprespawns")
NumPreSpawnedChildren = std::stoi(value);
else if (optionName == "admincreds")
AdminCreds = value;
else if (optionName == "allowlocalstorage")
AllowLocalStorage = true;
#if ENABLE_DEBUG
else if (optionName == "unitlib")
UnitTestLibrary = value;
else if (optionName == "nocaps")
NoCapsForKit = true;
else if (optionName == "careerspan")
careerSpanSeconds = std::stoi(value);
static const char* clientPort = getenv("LOOL_TEST_CLIENT_PORT");
if (clientPort)
ClientPortNumber = std::stoi(clientPort);
static const char* masterPort = getenv("LOOL_TEST_MASTER_PORT");
if (masterPort)
MasterPortNumber = std::stoi(masterPort);
#endif
}
void LOOLWSD::displayHelp()
{
HelpFormatter helpFormatter(options());
helpFormatter.setCommand(commandName());
helpFormatter.setUsage("OPTIONS");
helpFormatter.setHeader("LibreOffice On-Line WebSocket server.");
helpFormatter.format(std::cout);
}
Process::PID LOOLWSD::createForKit()
{
Process::Args args;
args.push_back("--losubpath=" + LOOLWSD::LoSubPath);
args.push_back("--systemplate=" + SysTemplate);
args.push_back("--lotemplate=" + LoTemplate);
args.push_back("--childroot=" + ChildRoot);
args.push_back("--clientport=" + std::to_string(ClientPortNumber));
if (UnitWSD::get().hasKitHooks())
args.push_back("--unitlib=" + UnitTestLibrary);
if (DisplayVersion)
args.push_back("--version");
std::string forKitPath = Path(Application::instance().commandPath()).parent().toString() + "loolforkit";
if (NoCapsForKit)
{
forKitPath = forKitPath + std::string("-nocaps");
args.push_back("--nocaps");
}
Log::info("Launching forkit process: " + forKitPath + " " +
Poco::cat(std::string(" "), args.begin(), args.end()));
lastForkRequestTime = std::chrono::steady_clock::now();
ProcessHandle child = Process::launch(forKitPath, args);
return child.id();
}
int LOOLWSD::main(const std::vector<std::string>& /*args*/)
{
if (DisplayVersion)
Util::displayVersionInfo("loolwsd");
#if ENABLE_SSL
initializeSSL();
#endif
char *locale = setlocale(LC_ALL, nullptr);
if (locale == nullptr || std::strcmp(locale, "C") == 0)
setlocale(LC_ALL, "en_US.utf8");
Util::setTerminationSignals();
Util::setFatalSignals();
if (access(Cache.c_str(), R_OK | W_OK | X_OK) != 0)
{
Log::syserror("Unable to access cache [" + Cache +
"] please make sure it exists, and has write permission for this user.");
return Application::EXIT_SOFTWARE;
}
// We use the same option set for both parent and child loolwsd,
// so must check options required in the parent (but not in the
// child) separately now. Also check for options that are
// meaningless for the parent.
if (SysTemplate.empty())
throw MissingOptionException("systemplate");
if (LoTemplate.empty())
throw MissingOptionException("lotemplate");
if (ChildRoot.empty())
throw MissingOptionException("childroot");
else if (ChildRoot[ChildRoot.size() - 1] != '/')
ChildRoot += '/';
if (FileServerRoot.empty())
FileServerRoot = Path(Application::instance().commandPath()).parent().parent().toString();
FileServerRoot = Poco::Path(FileServerRoot).absolute().toString();
Log::debug("FileServerRoot: " + FileServerRoot);
if (ClientPortNumber == MasterPortNumber)
throw IncompatibleOptionsException("port");
if (AdminCreds.empty())
{
Log::warn("No admin credentials set via 'admincreds' command-line argument. Admin Console will be disabled.");
}
// Create the directory where the fifo pipe with ForKit will be.
const Path pipePath = Path::forDirectory(ChildRoot + "/" + FIFO_PATH);
if (!File(pipePath).exists() && !File(pipePath).createDirectory())
{
Log::error("Failed to create pipe directory [" + pipePath.toString() + "].");
return Application::EXIT_SOFTWARE;
}
// Create the fifo with ForKit.
const std::string pipeLoolwsd = Path(pipePath, FIFO_LOOLWSD).toString();
Log::debug("mkfifo(" + pipeLoolwsd + ")");
if (mkfifo(pipeLoolwsd.c_str(), 0666) < 0 && errno != EEXIST)
{
Log::syserror("Failed to create fifo [" + pipeLoolwsd + "].");
return Application::EXIT_SOFTWARE;
}
// Init the file server
FileServer fileServer;
// Configure the Server.
// Note: TCPServer internally uses a ThreadPool to
// dispatch connections (the default if not given).
// The capacity of the ThreadPool is increased here to
// match MAX_SESSIONS. The pool must have sufficient available
// threads to dispatch new connections, otherwise will deadlock.
auto params1 = new HTTPServerParams();
params1->setMaxThreads(MAX_SESSIONS);
auto params2 = new HTTPServerParams();
params2->setMaxThreads(MAX_SESSIONS);
// Start a server listening on the port for clients
#if ENABLE_SSL
SecureServerSocket svs(ClientPortNumber);
#else
ServerSocket svs(ClientPortNumber);
#endif
ThreadPool threadPool(NumPreSpawnedChildren*6, MAX_SESSIONS * 2);
HTTPServer srv(new ClientRequestHandlerFactory(fileServer), threadPool, svs, params1);
Log::info("Starting master server listening on " + std::to_string(ClientPortNumber));
srv.start();
// And one on the port for child processes
SocketAddress addr2("127.0.0.1", MasterPortNumber);
ServerSocket svs2(addr2);
HTTPServer srv2(new PrisonerRequestHandlerFactory(), threadPool, svs2, params2);
Log::info("Starting prisoner server listening on " + std::to_string(MasterPortNumber));
srv2.start();
// Fire the ForKit process; we are ready.
const Process::PID forKitPid = createForKit();
if (forKitPid < 0)
{
Log::error("Failed to spawn loolforkit.");
return Application::EXIT_SOFTWARE;
}
// Open write fifo pipe with ForKit.
if ( (ForKitWritePipe = open(pipeLoolwsd.c_str(), O_WRONLY) ) < 0 )
{
Log::syserror("Failed to open pipe [" + pipeLoolwsd + "] for writing.");
return Application::EXIT_SOFTWARE;
}
Log::debug("open(" + pipeLoolwsd + ", WRONLY) = " + std::to_string(ForKitWritePipe));
// Init the Admin manager
Admin::instance().setForKitPid(forKitPid);
// Spawn some children, if necessary.
preForkChildren();
time_t last30SecCheck = time(NULL);
#if ENABLE_DEBUG
time_t startTimeSpan = last30SecCheck;
#endif
int status = 0;
while (!TerminationFlag)
{
UnitWSD::get().invokeTest();
const pid_t pid = waitpid(forKitPid, &status, WUNTRACED | WNOHANG);
if (pid > 0)
{
if (forKitPid == pid)
{
if (WIFEXITED(status))
{
Log::info() << "Child process [" << pid << "] exited with code: "
<< WEXITSTATUS(status) << "." << Log::end;
break;
}
else
if (WIFSIGNALED(status))
{
std::string fate = "died";
if (WCOREDUMP(status))
fate = "core-dumped";
Log::error() << "Child process [" << pid << "] " << fate
<< " with " << Util::signalName(WTERMSIG(status))
<< Log::end;
break;
}
else if (WIFSTOPPED(status))
{
Log::info() << "Child process [" << pid << "] stopped with "
<< Util::signalName(WSTOPSIG(status))
<< Log::end;
}
else if (WIFCONTINUED(status))
{
Log::info() << "Child process [" << pid << "] resumed with SIGCONT."
<< Log::end;
}
else
{
Log::warn() << "Unknown status returned by waitpid: "
<< std::hex << status << "." << Log::end;
}
}
else
{
Log::error("An unknown child process died, pid: " + std::to_string(pid));
}
}
else if (pid < 0)
{
Log::syserror("waitpid failed.");
// No child processes
if (errno == ECHILD)
{
TerminationFlag = true;
continue;
}
}
else // pid == 0, no children have died
{
if (!std::getenv("LOOL_NO_AUTOSAVE"))
{
if (time(nullptr) >= last30SecCheck + 30)
{
try
{
std::unique_lock<std::mutex> docBrokersLock(docBrokersMutex);
for (auto& brokerIt : docBrokers)
{
brokerIt.second->autoSave(false, 0);
}
}
catch (const std::exception& exc)
{
Log::error("Exception: " + std::string(exc.what()));
}
last30SecCheck = time(nullptr);
}
}
sleep(WSD_SLEEP_SECS);
// Make sure we have sufficient reserves.
prespawnChildren();
}
#if ENABLE_DEBUG
if (careerSpanSeconds > 0 && time(nullptr) > startTimeSpan + careerSpanSeconds)
{
Log::info(std::to_string(time(nullptr) - startTimeSpan) + " seconds gone, finishing as requested.");
TerminationFlag = true;
}
#endif
}
// stop the service, no more request
srv.stop();
srv2.stop();
// close all websockets
threadPool.joinAll();
// Terminate child processes
Log::info("Requesting child process " + std::to_string(forKitPid) + " to terminate");
Util::requestTermination(forKitPid);
for (auto& child : newChildren)
{
child->close(true);
}
// Wait for forkit process finish
waitpid(forKitPid, &status, WUNTRACED);
close(ForKitWritePipe);
Log::info("Cleaning up childroot directory [" + ChildRoot + "].");
std::vector<std::string> jails;
File(ChildRoot).list(jails);
for (auto& jail : jails)
{
const auto path = ChildRoot + jail;
Log::info("Removing jail [" + path + "].");
Util::removeFile(path, true);
}
#if ENABLE_SSL
Poco::Net::uninitializeSSL();
Poco::Crypto::uninitializeCrypto();
#endif
Log::info("Process [loolwsd] finished.");
int returnValue = Application::EXIT_OK;
UnitWSD::get().returnValue(returnValue);
return returnValue;
}
void UnitWSD::testHandleRequest(TestRequest type, UnitHTTPServerRequest& request, UnitHTTPServerResponse& response)
{
switch (type)
{
case TestRequest::TEST_REQ_CLIENT:
ClientRequestHandler::handleClientRequest(request, response);
break;
case TestRequest::TEST_REQ_PRISONER:
PrisonerRequestHandler::handlePrisonerRequest(request, response);
break;
default:
assert(false);
break;
}
}
POCO_SERVER_MAIN(LOOLWSD)
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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