cca858732a
Change-Id: I30405854e9ebdc56ab3477758e9008963d4b8efa
459 lines
18 KiB
C++
459 lines
18 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#include <cassert>
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#include <mutex>
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#include <sys/poll.h>
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#include <Poco/Net/HTTPCookie.h>
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#include <Poco/Net/HTTPBasicCredentials.h>
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#include <Poco/Net/HTTPRequest.h>
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#include <Poco/Net/HTTPRequestHandler.h>
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#include <Poco/Net/HTTPServerParams.h>
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#include <Poco/Net/HTTPServerRequest.h>
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#include <Poco/Net/HTTPServerResponse.h>
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#include <Poco/Net/NetException.h>
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#include <Poco/Net/SecureServerSocket.h>
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#include <Poco/Net/WebSocket.h>
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#include <Poco/StringTokenizer.h>
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#include <Poco/Util/ServerApplication.h>
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#include <Poco/Util/Timer.h>
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#include "Auth.hpp"
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#include "Admin.hpp"
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#include "AdminModel.hpp"
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#include "Common.hpp"
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#include "FileServer.hpp"
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#include "TileCache.hpp"
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#include "Storage.hpp"
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#include "LOOLProtocol.hpp"
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#include "LOOLWSD.hpp"
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#include "IoUtil.hpp"
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#include "Util.hpp"
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using namespace LOOLProtocol;
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using Poco::StringTokenizer;
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using Poco::Net::HTTPBasicCredentials;
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using Poco::Net::HTTPCookie;
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using Poco::Net::HTTPRequest;
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using Poco::Net::HTTPRequestHandler;
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using Poco::Net::HTTPRequestHandlerFactory;
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using Poco::Net::HTTPResponse;
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using Poco::Net::HTTPServerParams;
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using Poco::Net::HTTPServerRequest;
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using Poco::Net::HTTPServerResponse;
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using Poco::Net::SecureServerSocket;
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using Poco::Net::ServerSocket;
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using Poco::Net::Socket;
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using Poco::Net::WebSocket;
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using Poco::Net::WebSocketException;
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using Poco::Util::Application;
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/// Handle admin requests.
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void AdminRequestHandler::handleWSRequests(HTTPServerRequest& request, HTTPServerResponse& response, int nSessionId)
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{
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try
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{
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auto ws = std::make_shared<WebSocket>(request, response);
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{
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std::unique_lock<std::mutex> modelLock(_admin->getLock());
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// Subscribe the websocket of any AdminModel updates
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AdminModel& model = _admin->getModel();
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model.subscribe(nSessionId, ws);
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}
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const Poco::Timespan waitTime(POLL_TIMEOUT_MS * 1000);
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int flags = 0;
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int n = 0;
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ws->setReceiveTimeout(0);
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do
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{
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char buffer[200000]; //FIXME: Dynamic?
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if (ws->poll(waitTime, Socket::SELECT_READ))
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{
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n = ws->receiveFrame(buffer, sizeof(buffer), flags);
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if ((flags & WebSocket::FRAME_OP_BITMASK) == WebSocket::FRAME_OP_PING)
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{
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// Echo back the ping payload as pong.
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// Technically, we should send back a PONG control frame.
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// However Firefox (probably) or Node.js (possibly) doesn't
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// like that and closes the socket when we do.
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// Echoing the payload as a normal frame works with Firefox.
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ws->sendFrame(buffer, n /*, WebSocket::FRAME_OP_PONG*/);
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}
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else if ((flags & WebSocket::FRAME_OP_BITMASK) == WebSocket::FRAME_OP_PONG)
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{
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// In case we do send pings in the future.
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}
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else if (n <= 0)
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{
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// Connection closed.
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Log::warn() << "Received " << n
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<< " bytes. Connection closed. Flags: "
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<< std::hex << flags << Log::end;
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break;
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}
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else
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{
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assert(n > 0);
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const std::string firstLine = getFirstLine(buffer, n);
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StringTokenizer tokens(firstLine, " ", StringTokenizer::TOK_IGNORE_EMPTY | StringTokenizer::TOK_TRIM);
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Log::trace("Recv: " + firstLine);
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if (tokens.count() < 1)
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continue;
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// Lock the model mutex before interacting with it
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std::unique_lock<std::mutex> modelLock(_admin->getLock());
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AdminModel& model = _admin->getModel();
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if (tokens[0] == "stats")
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{
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//TODO: Collect stats and reply back to admin.
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// We need to ask ForKit to give us some numbers on docs/clients/etc.
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// But we can also collect some memory info using system calls.
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std::string statsResponse;
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const auto cmd = "pstree -a -c -h -A -p " + std::to_string(getpid());
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FILE* fp = popen(cmd.c_str(), "r");
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if (fp == nullptr)
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{
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statsResponse = "error: failed to collect stats.";
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ws->sendFrame(statsResponse.data(), statsResponse.size());
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continue;
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}
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char treeBuffer[1024];
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while (fgets(treeBuffer, sizeof(treeBuffer)-1, fp) != nullptr &&
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!TerminationFlag)
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{
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statsResponse += treeBuffer;
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statsResponse += "</ BR>\n";
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}
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pclose(fp);
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ws->sendFrame(statsResponse.data(), statsResponse.size());
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}
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else if (tokens[0] == "subscribe" && tokens.count() > 1)
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{
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for (unsigned i = 0; i < tokens.count() - 1; i++)
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{
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model.subscribe(nSessionId, tokens[i + 1]);
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}
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}
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else if (tokens[0] == "unsubscribe" && tokens.count() > 1)
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{
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for (unsigned i = 0; i < tokens.count() - 1; i++)
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{
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model.unsubscribe(nSessionId, tokens[i + 1]);
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}
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}
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else if (tokens[0] == "documents")
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{
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std::string responseString = "documents " + model.query("documents");
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ws->sendFrame(responseString.data(), responseString.size());
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}
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else if (tokens[0] == "total_mem")
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{
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unsigned totalMem = _admin->getTotalMemoryUsage(model);
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std::string responseFrame = "total_mem " + std::to_string(totalMem);
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ws->sendFrame(responseFrame.data(), responseFrame.size());
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}
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else if (tokens[0] == "active_users_count")
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{
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std::string responseFrame = tokens[0] + " " + model.query(tokens[0]);
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ws->sendFrame(responseFrame.data(), responseFrame.size());
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}
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else if (tokens[0] == "active_docs_count")
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{
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std::string responseFrame = tokens[0] + " " + model.query(tokens[0]);
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ws->sendFrame(responseFrame.data(), responseFrame.size());
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}
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else if (tokens[0] == "kill" && tokens.count() == 2)
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{
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try
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{
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const auto pid = std::stoi(tokens[1]);
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if (kill(pid, SIGINT) != 0 && kill(pid, 0) !=0)
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{
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Log::syserror("Cannot terminate PID: " + tokens[0]);
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}
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}
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catch(std::invalid_argument& exc)
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{
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Log::warn() << "Invalid PID to kill: " << tokens[0] << Log::end;
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}
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}
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else if (tokens[0] == "mem_stats")
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{
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std::ostringstream oss;
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oss << tokens[0] << " "
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<< model.query(tokens[0]);
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std::string responseFrame = oss.str();
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ws->sendFrame(responseFrame.data(), responseFrame.size());
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}
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else if (tokens[0] == "cpu_stats")
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{
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std::ostringstream oss;
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oss << tokens[0] << " "
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<< model.query(tokens[0]);
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std::string responseFrame = oss.str();
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ws->sendFrame(responseFrame.data(), responseFrame.size());
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}
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else if (tokens[0] == "settings")
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{
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// for now, we have only these settings
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std::ostringstream oss;
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oss << tokens[0] << " "
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<< "mem_stats_size=" << model.query("mem_stats_size") << " "
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<< "mem_stats_interval=" << std::to_string(_admin->getMemStatsInterval()) << " "
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<< "cpu_stats_size=" << model.query("cpu_stats_size") << " "
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<< "cpu_stats_interval=" << std::to_string(_admin->getCpuStatsInterval());
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std::string responseFrame = oss.str();
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ws->sendFrame(responseFrame.data(), responseFrame.size());
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}
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else if (tokens[0] == "set" && tokens.count() > 1)
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{
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for (unsigned i = 1; i < tokens.count(); i++)
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{
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StringTokenizer setting(tokens[i], "=", StringTokenizer::TOK_IGNORE_EMPTY | StringTokenizer::TOK_TRIM);
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unsigned settingVal = 0;
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try
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{
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settingVal = std::stoi(setting[1]);
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}
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catch (const std::exception& exc)
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{
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Log::warn() << "Invalid setting value: "
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<< setting[1] << " for "
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<< setting[0] << Log::end;
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continue;
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}
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if (setting[0] == "mem_stats_size")
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{
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if (settingVal != static_cast<unsigned>(std::stoi(model.query(setting[0]))))
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{
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model.setMemStatsSize(settingVal);
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}
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}
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else if (setting[0] == "mem_stats_interval")
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{
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if (settingVal != _admin->getMemStatsInterval())
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{
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_admin->rescheduleMemTimer(settingVal);
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model.clearMemStats();
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model.notify("settings mem_stats_interval=" + std::to_string(settingVal));
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}
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}
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else if (setting[0] == "cpu_stats_size")
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{
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if (settingVal != static_cast<unsigned>(std::stoi(model.query(setting[0]))))
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{
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model.setCpuStatsSize(settingVal);
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}
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}
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else if (setting[0] == "cpu_stats_interval")
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{
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if (settingVal != _admin->getCpuStatsInterval())
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{
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_admin->rescheduleCpuTimer(settingVal);
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model.clearCpuStats();
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model.notify("settings cpu_stats_interval=" + std::to_string(settingVal));
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}
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}
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}
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}
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}
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}
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}
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while (!TerminationFlag &&
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(flags & WebSocket::FRAME_OP_BITMASK) != WebSocket::FRAME_OP_CLOSE);
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Log::debug() << "Finishing AdminProcessor. TerminationFlag: " << TerminationFlag
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<< ", payload size: " << n
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<< ", flags: " << std::hex << flags << Log::end;
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}
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catch (const WebSocketException& exc)
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{
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Log::error("AdminRequestHandler::handleRequest: WebSocketException: " + exc.message());
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switch (exc.code())
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{
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case WebSocket::WS_ERR_HANDSHAKE_UNSUPPORTED_VERSION:
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response.set("Sec-WebSocket-Version", WebSocket::WEBSOCKET_VERSION);
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// fallthrough
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case WebSocket::WS_ERR_NO_HANDSHAKE:
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case WebSocket::WS_ERR_HANDSHAKE_NO_VERSION:
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case WebSocket::WS_ERR_HANDSHAKE_NO_KEY:
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response.setStatusAndReason(HTTPResponse::HTTP_BAD_REQUEST);
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response.setContentLength(0);
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response.send();
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break;
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}
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}
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catch (const Poco::Net::NotAuthenticatedException& exc)
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{
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Log::info("NotAuthenticatedException");
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response.set("WWW-Authenticate", "Basic realm=\"ws-online\"");
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response.setStatus(HTTPResponse::HTTP_UNAUTHORIZED);
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response.setContentLength(0);
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response.send();
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}
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catch (const std::exception& exc)
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{
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Log::error(std::string("AdminRequestHandler::handleRequest: Exception: ") + exc.what());
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}
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}
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AdminRequestHandler::AdminRequestHandler(Admin* adminManager)
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: _admin(adminManager)
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{ }
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void AdminRequestHandler::handleRequest(HTTPServerRequest& request, HTTPServerResponse& response)
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{
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// Different session id pool for admin sessions (?)
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const auto nSessionId = Util::decodeId(LOOLWSD::GenSessionId());
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Util::setThreadName("admin_ws_" + std::to_string(nSessionId));
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Log::debug("Thread started.");
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try
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{
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std::string requestURI = request.getURI();
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StringTokenizer pathTokens(requestURI, "/", StringTokenizer::TOK_IGNORE_EMPTY | StringTokenizer::TOK_TRIM);
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if (request.find("Upgrade") != request.end() && Poco::icompare(request["Upgrade"], "websocket") == 0)
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{
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if (!FileServerRequestHandler::isAdminLoggedIn(request, response))
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throw Poco::Net::NotAuthenticatedException("Invalid admin login");
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handleWSRequests(request, response, nSessionId);
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}
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}
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catch(const Poco::Net::NotAuthenticatedException& exc)
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{
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Log::info("Admin::NotAuthenticated");
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response.set("WWW-Authenticate", "Basic realm=\"online\"");
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response.setStatus(HTTPResponse::HTTP_UNAUTHORIZED);
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response.setContentLength(0);
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response.send();
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}
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catch (const std::exception& exc)
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{
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Log::info("Unknown Exception caught");
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response.setStatusAndReason(HTTPResponse::HTTP_BAD_REQUEST);
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response.setContentLength(0);
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response.send();
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}
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Log::debug("Thread finished.");
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}
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/// An admin command processor.
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Admin::Admin() :
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_model(AdminModel())
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{
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Log::info("Admin ctor.");
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_memStatsTask = new MemoryStats(this);
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_memStatsTimer.schedule(_memStatsTask, _memStatsTaskInterval, _memStatsTaskInterval);
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_cpuStatsTask = new CpuStats(this);
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_cpuStatsTimer.schedule(_cpuStatsTask, _cpuStatsTaskInterval, _cpuStatsTaskInterval);
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}
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Admin::~Admin()
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{
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Log::info("~Admin dtor.");
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_memStatsTask->cancel();
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_cpuStatsTask->cancel();
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}
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void Admin::addDoc(const std::string& docKey, Poco::Process::PID pid, const std::string& filename, const int sessionId)
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{
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std::unique_lock<std::mutex> modelLock(_modelMutex);
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_model.addDocument(docKey, pid, filename, sessionId);
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}
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void Admin::rmDoc(const std::string& docKey, const int sessionId)
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{
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std::unique_lock<std::mutex> modelLock(_modelMutex);
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_model.removeDocument(docKey, sessionId);
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}
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void MemoryStats::run()
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{
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std::unique_lock<std::mutex> modelLock(_admin->getLock());
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AdminModel& model = _admin->getModel();
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unsigned totalMem = _admin->getTotalMemoryUsage(model);
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Log::info("Total memory used: " + std::to_string(totalMem));
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model.addMemStats(totalMem);
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}
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void CpuStats::run()
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{
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//TODO: Implement me
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//std::unique_lock<std::mutex> modelLock(_admin->getLock());
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//model.addCpuStats(totalMem);
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}
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void Admin::rescheduleMemTimer(unsigned interval)
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{
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_memStatsTask->cancel();
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_memStatsTaskInterval = interval;
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_memStatsTask = new MemoryStats(this);
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_memStatsTimer.schedule(_memStatsTask, _memStatsTaskInterval, _memStatsTaskInterval);
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Log::info("Memory stats interval changed - New interval: " + std::to_string(interval));
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}
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void Admin::rescheduleCpuTimer(unsigned interval)
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{
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_cpuStatsTask->cancel();
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_cpuStatsTaskInterval = interval;
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_cpuStatsTask = new CpuStats(this);
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_cpuStatsTimer.schedule(_cpuStatsTask, _cpuStatsTaskInterval, _cpuStatsTaskInterval);
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Log::info("CPU stats interval changed - New interval: " + std::to_string(interval));
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}
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unsigned Admin::getTotalMemoryUsage(AdminModel& model)
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{
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unsigned totalMem = Util::getMemoryUsage(_forKitPid);
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totalMem += model.getTotalMemoryUsage();
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totalMem += Util::getMemoryUsage(Poco::Process::id());
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return totalMem;
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}
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unsigned Admin::getMemStatsInterval()
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{
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return _memStatsTaskInterval;
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}
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unsigned Admin::getCpuStatsInterval()
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{
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return _cpuStatsTaskInterval;
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}
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AdminModel& Admin::getModel()
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{
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return _model;
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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