593 lines
22 KiB
C++
593 lines
22 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 "config.h"
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#include <string>
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#include <vector>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <zlib.h>
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#include <Poco/DateTime.h>
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#include <Poco/DateTimeFormat.h>
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#include <Poco/DateTimeFormatter.h>
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#include <Poco/Exception.h>
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#include <Poco/FileStream.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/HTTPResponse.h>
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#include <Poco/Net/HTMLForm.h>
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#include <Poco/Net/HTTPRequest.h>
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#include <Poco/Net/NameValueCollection.h>
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#include <Poco/Net/NetException.h>
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#include <Poco/RegularExpression.h>
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#include <Poco/Runnable.h>
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#include <Poco/StreamCopier.h>
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#include <Poco/StringTokenizer.h>
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#include <Poco/URI.h>
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#include "Auth.hpp"
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#include "Common.hpp"
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#include "FileServer.hpp"
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#include "LOOLWSD.hpp"
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#include "Log.hpp"
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using Poco::FileInputStream;
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using Poco::Net::HTMLForm;
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using Poco::Net::HTTPRequest;
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using Poco::Net::HTTPResponse;
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using Poco::Net::NameValueCollection;
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using Poco::Net::HTTPBasicCredentials;
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using Poco::StreamCopier;
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using Poco::Util::Application;
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std::map<std::string, std::pair<std::string, std::string>> FileServerRequestHandler::FileHash;
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bool FileServerRequestHandler::isAdminLoggedIn(const HTTPRequest& request,
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HTTPResponse &response)
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{
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const auto& config = Application::instance().config();
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const auto sslKeyPath = config.getString("ssl.key_file_path", "");
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NameValueCollection cookies;
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request.getCookies(cookies);
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try
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{
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const std::string jwtToken = cookies.get("jwt");
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LOG_INF("Verifying JWT token: " << jwtToken);
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JWTAuth authAgent(sslKeyPath, "admin", "admin", "admin");
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if (authAgent.verify(jwtToken))
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{
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LOG_TRC("JWT token is valid");
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return true;
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}
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LOG_INF("Invalid JWT token, let the administrator re-login");
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}
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catch (const Poco::Exception& exc)
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{
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LOG_INF("No existing JWT cookie found");
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}
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// If no cookie found, or is invalid, let admin re-login
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const auto user = config.getString("admin_console.username", "");
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const auto pass = config.getString("admin_console.password", "");
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if (user.empty() || pass.empty())
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{
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LOG_ERR("Admin Console credentials missing. Denying access until set.");
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return false;
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}
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HTTPBasicCredentials credentials(request);
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if (credentials.getUsername() == user &&
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credentials.getPassword() == pass)
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{
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const std::string htmlMimeType = "text/html";
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// generate and set the cookie
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JWTAuth authAgent(sslKeyPath, "admin", "admin", "admin");
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const std::string jwtToken = authAgent.getAccessToken();
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Poco::Net::HTTPCookie cookie("jwt", jwtToken);
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// bundlify appears to add an extra /dist -> dist/dist/admin
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cookie.setPath("/loleaflet/dist/");
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cookie.setSecure(LOOLWSD::isSSLEnabled() ||
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LOOLWSD::isSSLTermination());
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response.addCookie(cookie);
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return true;
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}
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LOG_INF("Wrong admin credentials.");
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return false;
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}
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void FileServerRequestHandler::handleRequest(const HTTPRequest& request, Poco::MemoryInputStream& message,
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const std::shared_ptr<StreamSocket>& socket)
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{
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try
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{
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bool noCache = false;
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Poco::Net::HTTPResponse response;
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Poco::URI requestUri(request.getURI());
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LOG_TRC("Fileserver request: " << requestUri.toString());
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requestUri.normalize(); // avoid .'s and ..'s
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std::vector<std::string> requestSegments;
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requestUri.getPathSegments(requestSegments);
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if (requestSegments.size() < 1)
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{
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throw Poco::FileNotFoundException("Invalid URI request: [" + requestUri.toString() + "].");
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}
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const auto& config = Application::instance().config();
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const std::string loleafletHtml = config.getString("loleaflet_html", "loleaflet.html");
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const std::string endPoint = requestSegments[requestSegments.size() - 1];
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if (endPoint == loleafletHtml)
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{
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preprocessFile(request, message, socket);
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return;
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}
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if (request.getMethod() == HTTPRequest::HTTP_GET)
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{
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if (endPoint == "admin.html" ||
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endPoint == "adminSettings.html" ||
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endPoint == "adminAnalytics.html")
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{
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noCache = true;
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if (!FileServerRequestHandler::isAdminLoggedIn(request, response))
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throw Poco::Net::NotAuthenticatedException("Invalid admin login");
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// Ask UAs to block if they detect any XSS attempt
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response.add("X-XSS-Protection", "1; mode=block");
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// No referrer-policy
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response.add("Referrer-Policy", "no-referrer");
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}
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const std::string relPath = getRequestPathname(request);
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// Is this a file we read at startup - if not; its not for serving.
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if (FileHash.find(relPath) == FileHash.end())
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throw Poco::FileAccessDeniedException("Invalid or forbidden file path: [" + relPath + "].");
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// Do we have an extension.
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const std::size_t extPoint = endPoint.find_last_of('.');
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if (extPoint == std::string::npos)
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throw Poco::FileNotFoundException("Invalid file.");
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const std::string fileType = endPoint.substr(extPoint + 1);
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std::string mimeType;
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if (fileType == "js")
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mimeType = "application/javascript";
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else if (fileType == "css")
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mimeType = "text/css";
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else if (fileType == "html")
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mimeType = "text/html";
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else if (fileType == "png")
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mimeType = "image/png";
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else if (fileType == "svg")
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mimeType = "image/svg+xml";
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else
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mimeType = "text/plain";
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auto it = request.find("If-None-Match");
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if (it != request.end())
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{
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// if ETags match avoid re-sending the file.
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if (!noCache && it->second == "\"" LOOLWSD_VERSION_HASH "\"")
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{
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// TESTME: harder ... - do we even want ETag support ?
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std::ostringstream oss;
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Poco::DateTime now;
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Poco::DateTime later(now.utcTime(), int64_t(1000)*1000 * 60 * 60 * 24 * 128);
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oss << "HTTP/1.1 304 Not Modified\r\n"
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<< "Date: " << Poco::DateTimeFormatter::format(
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now, Poco::DateTimeFormat::HTTP_FORMAT) << "\r\n"
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<< "Expires: " << Poco::DateTimeFormatter::format(
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later, Poco::DateTimeFormat::HTTP_FORMAT) << "\r\n"
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<< "User-Agent: " << WOPI_AGENT_STRING << "\r\n"
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<< "Cache-Control: max-age=11059200\r\n"
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<< "\r\n";
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socket->send(oss.str());
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socket->shutdown();
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return;
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}
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}
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response.set("User-Agent", HTTP_AGENT_STRING);
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response.set("Date", Poco::DateTimeFormatter::format(Poco::Timestamp(), Poco::DateTimeFormat::HTTP_FORMAT));
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bool gzip = request.hasToken("Accept-Encoding", "gzip");
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const std::string *content;
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#if ENABLE_DEBUG
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if (std::getenv("LOOL_SERVE_FROM_FS"))
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{
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// Useful to not serve from memory sometimes especially during loleaflet development
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// Avoids having to restart loolwsd everytime you make a change in loleaflet
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const auto filePath = Poco::Path(LOOLWSD::FileServerRoot, relPath).absolute().toString();
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HttpHelper::sendFile(socket, filePath, mimeType, response, noCache);
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return;
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}
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#endif
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if (gzip)
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{
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response.set("Content-Encoding", "gzip");
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content = getCompressedFile(relPath);
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}
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else
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content = getUncompressedFile(relPath);
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if (!noCache)
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{
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// 60 * 60 * 24 * 128 (days) = 11059200
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response.set("Cache-Control", "max-age=11059200");
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response.set("ETag", "\"" LOOLWSD_VERSION_HASH "\"");
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}
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response.setContentType(mimeType);
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response.add("X-Content-Type-Options", "nosniff");
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std::ostringstream oss;
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response.write(oss);
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const std::string header = oss.str();
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LOG_TRC("#" << socket->getFD() << ": Sending " <<
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(!gzip ? "un":"") << "compressed : file [" << relPath << "]: " << header);
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socket->send(header);
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socket->send(*content);
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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_ERR("FileServerRequestHandler::NotAuthenticated: " << exc.displayText());
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// Unauthorized.
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std::ostringstream oss;
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oss << "HTTP/1.1 401\r\n"
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<< "Date: " << Poco::DateTimeFormatter::format(Poco::Timestamp(), Poco::DateTimeFormat::HTTP_FORMAT) << "\r\n"
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<< "User-Agent: " << WOPI_AGENT_STRING << "\r\n"
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<< "Content-Length: 0\r\n"
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<< "WWW-Authenticate: Basic realm=\"online\"\r\n"
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<< "\r\n";
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socket->send(oss.str());
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}
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catch (const Poco::FileAccessDeniedException& exc)
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{
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LOG_ERR("FileServerRequestHandler: " << exc.displayText());
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// TODO return some 403 page?
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std::ostringstream oss;
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oss << "HTTP/1.1 403\r\n"
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<< "Date: " << Poco::DateTimeFormatter::format(Poco::Timestamp(), Poco::DateTimeFormat::HTTP_FORMAT) << "\r\n"
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<< "User-Agent: " << WOPI_AGENT_STRING << "\r\n"
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<< "Content-Length: 0\r\n"
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<< "\r\n";
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socket->send(oss.str());
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}
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catch (const Poco::FileNotFoundException& exc)
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{
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LOG_ERR("FileServerRequestHandler: " << exc.displayText());
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// 404 not found
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std::ostringstream oss;
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oss << "HTTP/1.1 404\r\n"
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<< "Date: " << Poco::DateTimeFormatter::format(Poco::Timestamp(), Poco::DateTimeFormat::HTTP_FORMAT) << "\r\n"
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<< "User-Agent: " << WOPI_AGENT_STRING << "\r\n"
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<< "Content-Length: 0\r\n"
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<< "\r\n";
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socket->send(oss.str());
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}
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}
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void FileServerRequestHandler::readDirToHash(const std::string &basePath, const std::string &path)
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{
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struct dirent *currentFile;
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struct stat fileStat;
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DIR *workingdir;
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LOG_TRC("Pre-reading directory: " << basePath + path << "\n");
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workingdir = opendir((basePath + path).c_str());
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while ((currentFile = readdir(workingdir)) != NULL)
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{
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if (currentFile->d_name[0] == '.')
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continue;
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std::string relPath = path + "/" + currentFile->d_name;
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stat ((basePath + relPath).c_str(), &fileStat);
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if (S_ISDIR(fileStat.st_mode))
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readDirToHash(basePath, relPath);
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else if (S_ISREG(fileStat.st_mode))
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{
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LOG_TRC("Reading file: '" << (basePath + relPath) << " as '" << relPath << "'\n");
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std::ifstream file(basePath + relPath, std::ios::binary);
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z_stream strm;
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strm.zalloc = Z_NULL;
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strm.zfree = Z_NULL;
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strm.opaque = Z_NULL;
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deflateInit2(&strm, Z_DEFAULT_COMPRESSION, Z_DEFLATED, 31, 8, Z_DEFAULT_STRATEGY);
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auto buf = std::unique_ptr<char[]>(new char[fileStat.st_size]);
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std::string compressedFile = "";
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std::string uncompressedFile = "";
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do {
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file.read(&buf[0], fileStat.st_size);
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const long unsigned int size = file.gcount();
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if (size == 0)
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break;
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long unsigned int haveComp;
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long unsigned int compSize = compressBound(size);
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char *cbuf;
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cbuf = (char *)calloc(compSize, sizeof(char));
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strm.next_in = (unsigned char *)&buf[0];
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strm.avail_in = size;
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strm.avail_out = compSize;
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strm.next_out = (unsigned char *)&cbuf[0];
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deflate(&strm, Z_FINISH);
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haveComp = compSize - strm.avail_out;
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std::string partialcompFile(cbuf, haveComp);
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std::string partialuncompFile(buf.get(), size);
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compressedFile = compressedFile + partialcompFile;
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uncompressedFile = uncompressedFile + partialuncompFile;
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} while(true);
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std::pair<std::string, std::string> FilePair(uncompressedFile, compressedFile);
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FileHash.emplace(relPath, FilePair);
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}
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}
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closedir(workingdir);
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}
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void FileServerRequestHandler::initialize()
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{
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static const std::vector<std::string> subdirs = { "/loleaflet/dist" };
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for(const auto& subdir: subdirs)
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{
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try {
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readDirToHash(LOOLWSD::FileServerRoot, subdir);
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} catch (...) {
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LOG_ERR("Failed to read from directory " << subdir);
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}
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}
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}
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const std::string *FileServerRequestHandler::getCompressedFile(const std::string &path)
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{
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return &FileHash[path].second;
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}
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const std::string *FileServerRequestHandler::getUncompressedFile(const std::string &path)
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{
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return &FileHash[path].first;
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}
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std::string FileServerRequestHandler::getRequestPathname(const HTTPRequest& request)
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{
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Poco::URI requestUri(request.getURI());
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// avoid .'s and ..'s
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requestUri.normalize();
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std::string path(requestUri.getPath());
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// Convert version back to a real file name.
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Poco::replaceInPlace(path, std::string("/loleaflet/" LOOLWSD_VERSION_HASH "/"), std::string("/loleaflet/dist/"));
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return path;
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}
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void FileServerRequestHandler::preprocessFile(const HTTPRequest& request, Poco::MemoryInputStream& message, const std::shared_ptr<StreamSocket>& socket)
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{
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const auto host = ((LOOLWSD::isSSLEnabled() || LOOLWSD::isSSLTermination()) ? "wss://" : "ws://") + (LOOLWSD::ServerName.empty() ? request.getHost() : LOOLWSD::ServerName);
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const auto params = Poco::URI(request.getURI()).getQueryParameters();
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// Is this a file we read at startup - if not; its not for serving.
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const std::string relPath = getRequestPathname(request);
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LOG_DBG("Preprocessing file: " << relPath);
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if (FileHash.find(relPath) == FileHash.end())
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{
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LOG_ERR("File [" << relPath << "] does not exist.");
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// 404 not found
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std::ostringstream oss;
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oss << "HTTP/1.1 404\r\n"
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<< "Date: " << Poco::DateTimeFormatter::format(Poco::Timestamp(), Poco::DateTimeFormat::HTTP_FORMAT) << "\r\n"
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<< "User-Agent: " << WOPI_AGENT_STRING << "\r\n"
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<< "Content-Length: 0\r\n"
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<< "\r\n";
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socket->send(oss.str());
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return;
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}
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std::string preprocess = *getUncompressedFile(relPath);
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HTMLForm form(request, message);
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const std::string& accessToken = form.get("access_token", "");
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const std::string& accessTokenTtl = form.get("access_token_ttl", "");
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LOG_TRC("access_token=" << accessToken << ", access_token_ttl=" << accessTokenTtl);
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// Escape bad characters in access token.
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// This is placed directly in javascript in loleaflet.html, we need to make sure
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// that no one can do anything nasty with their clever inputs.
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std::string escapedAccessToken;
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Poco::URI::encode(accessToken, "'", escapedAccessToken);
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unsigned long tokenTtl = 0;
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if (accessToken != "")
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{
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if (accessTokenTtl != "")
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{
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try
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{
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tokenTtl = std::stoul(accessTokenTtl);
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}
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catch(const std::exception& exc)
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{
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LOG_ERR("access_token_ttl must be represented as the number of milliseconds since January 1, 1970 UTC, when the token will expire");
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}
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}
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else
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{
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LOG_WRN("WOPI host did not pass optional access_token_ttl");
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}
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}
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Poco::replaceInPlace(preprocess, std::string("%ACCESS_TOKEN%"), escapedAccessToken);
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Poco::replaceInPlace(preprocess, std::string("%ACCESS_TOKEN_TTL%"), std::to_string(tokenTtl));
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Poco::replaceInPlace(preprocess, std::string("%HOST%"), host);
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Poco::replaceInPlace(preprocess, std::string("%VERSION%"), std::string(LOOLWSD_VERSION_HASH));
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const auto& config = Application::instance().config();
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const auto loleafletLogging = config.getString("loleaflet_logging", "false");
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Poco::replaceInPlace(preprocess, std::string("%LOLEAFLET_LOGGING%"), loleafletLogging);
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const auto outOfFocusTimeoutSecs= config.getString("per_view.out_of_focus_timeout_secs", "60");
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Poco::replaceInPlace(preprocess, std::string("%OUT_OF_FOCUS_TIMEOUT_SECS%"), outOfFocusTimeoutSecs);
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const auto idleTimeoutSecs= config.getString("per_view.idle_timeout_secs", "900");
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Poco::replaceInPlace(preprocess, std::string("%IDLE_TIMEOUT_SECS%"), idleTimeoutSecs);
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const std::string mimeType = "text/html";
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std::ostringstream oss;
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oss << "HTTP/1.1 200 OK\r\n"
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<< "Date: " << Poco::DateTimeFormatter::format(Poco::Timestamp(), Poco::DateTimeFormat::HTTP_FORMAT) << "\r\n"
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<< "Last-Modified: " << Poco::DateTimeFormatter::format(Poco::Timestamp(), Poco::DateTimeFormat::HTTP_FORMAT) << "\r\n"
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<< "User-Agent: " << WOPI_AGENT_STRING << "\r\n"
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<< "Cache-Control:max-age=11059200\r\n"
|
|
<< "ETag: \"" LOOLWSD_VERSION_HASH "\"\r\n"
|
|
<< "Content-Length: " << preprocess.size() << "\r\n"
|
|
<< "Content-Type: " << mimeType << "\r\n"
|
|
<< "X-Content-Type-Options: nosniff\r\n"
|
|
<< "X-XSS-Protection: 1; mode=block\r\n"
|
|
<< "Referrer-Policy: no-referrer\r\n";
|
|
|
|
std::ostringstream cspOss;
|
|
cspOss << "Content-Security-Policy: default-src 'none'; "
|
|
<< "frame-src 'self' blob:; "
|
|
<< "connect-src 'self' " << host << "; "
|
|
<< "script-src 'unsafe-inline' 'self'; "
|
|
<< "style-src 'self' 'unsafe-inline'; "
|
|
<< "font-src 'self' data:; "
|
|
<< "img-src 'self' data:; ";
|
|
|
|
std::string frameAncestor;
|
|
const auto it = request.find("Referer"); // Referer[sic]
|
|
if (it != request.end())
|
|
{
|
|
frameAncestor = it->second;
|
|
LOG_TRC("Picking frame ancestor from HTTP Referer header: " << frameAncestor);
|
|
}
|
|
else // Use WOPISrc value if Referer is absent
|
|
{
|
|
for (const auto& param : params)
|
|
{
|
|
if (param.first == "WOPISrc")
|
|
{
|
|
Poco::URI::decode(param.second, frameAncestor);
|
|
LOG_TRC("Picking frame ancestor from WOPISrc: " << frameAncestor);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Keep only the origin, reject everything else
|
|
Poco::URI uriFrameAncestor(frameAncestor);
|
|
if (!frameAncestor.empty() && !uriFrameAncestor.getScheme().empty() && !uriFrameAncestor.getHost().empty())
|
|
{
|
|
frameAncestor = uriFrameAncestor.getScheme() + "://" + uriFrameAncestor.getHost() + ":" + std::to_string(uriFrameAncestor.getPort());
|
|
|
|
LOG_TRC("Final frame ancestor: " << frameAncestor);
|
|
|
|
// Replaced by frame-ancestors in CSP but some oldies don't know about that
|
|
oss << "X-Frame-Options: allow-from " << frameAncestor << "\r\n";
|
|
cspOss << "frame-ancestors " << frameAncestor;
|
|
}
|
|
else
|
|
{
|
|
LOG_TRC("Denied frame ancestor: " << frameAncestor);
|
|
|
|
oss << "X-Frame-Options: deny\r\n";
|
|
}
|
|
|
|
cspOss << "\r\n";
|
|
// Append CSP to response headers too
|
|
oss << cspOss.str();
|
|
|
|
// Setup HTTP Public key pinning
|
|
if (LOOLWSD::isSSLEnabled() && config.getBool("ssl.hpkp[@enable]", false))
|
|
{
|
|
size_t i = 0;
|
|
std::string pinPath = "ssl.hpkp.pins.pin[" + std::to_string(i) + "]";
|
|
std::ostringstream hpkpOss;
|
|
bool keysPinned = false;
|
|
while (config.has(pinPath))
|
|
{
|
|
const auto pin = config.getString(pinPath, "");
|
|
if (!pin.empty())
|
|
{
|
|
hpkpOss << "pin-sha256=\"" << pin << "\"; ";
|
|
keysPinned = true;
|
|
}
|
|
pinPath = "ssl.hpkp.pins.pin[" + std::to_string(++i) + "]";
|
|
}
|
|
|
|
if (keysPinned && config.getBool("ssl.hpkp.max_age[@enable]", false))
|
|
{
|
|
int maxAge = 1000; // seconds
|
|
try
|
|
{
|
|
maxAge = config.getInt("ssl.hpkp.max_age", maxAge);
|
|
}
|
|
catch (Poco::SyntaxException& exc)
|
|
{
|
|
LOG_WRN("Invalid value of HPKP's max-age directive found in config file. Defaulting to "
|
|
<< maxAge);
|
|
}
|
|
hpkpOss << "max-age=" << maxAge << "; ";
|
|
}
|
|
|
|
if (keysPinned && config.getBool("ssl.hpkp.report_uri[@enable]", false))
|
|
{
|
|
const std::string reportUri = config.getString("ssl.hpkp.report_uri", "");
|
|
if (!reportUri.empty())
|
|
{
|
|
hpkpOss << "report-uri=" << reportUri << "; ";
|
|
}
|
|
}
|
|
|
|
if (!hpkpOss.str().empty())
|
|
{
|
|
if (config.getBool("ssl.hpkp[@report_only]", false))
|
|
{
|
|
// Only send validation failure reports to reportUri while still allowing UAs to
|
|
// connect to the server
|
|
oss << "Public-Key-Pins-Report-Only: " << hpkpOss.str() << "\r\n";
|
|
}
|
|
else
|
|
{
|
|
oss << "Public-Key-Pins: " << hpkpOss.str() << "\r\n";
|
|
}
|
|
}
|
|
}
|
|
|
|
oss << "\r\n"
|
|
<< preprocess;
|
|
|
|
socket->send(oss.str());
|
|
LOG_DBG("Sent file: " << relPath << ": " << preprocess);
|
|
}
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|