ba96b95954
We act as a client when we communicate with owncloud server. For time being, just accept whatever certificates owncloud server gives us. We might want to get more strict here in future. Change-Id: I4813d19412b66ecf57d6cdef9c3ac94fbbaa521f
376 lines
13 KiB
C++
376 lines
13 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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// Storage abstraction.
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#ifndef INCLUDED_STORAGE_HPP
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#define INCLUDED_STORAGE_HPP
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#include <cassert>
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#include <string>
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#include <fstream>
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#include <Poco/Net/HTTPResponse.h>
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#include <Poco/Net/HTTPSClientSession.h>
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#include <Poco/Net/SSLManager.h>
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#include <Poco/StreamCopier.h>
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#include <Poco/JSON/Object.h>
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#include <Poco/JSON/Parser.h>
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#include "Common.hpp"
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#include "Auth.hpp"
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#include "Util.hpp"
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/// Base class of all Storage abstractions.
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class StorageBase
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{
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public:
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class FileInfo
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{
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public:
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std::string Filename;
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Poco::Timestamp ModifiedTime;
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size_t Size;
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};
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/// localStorePath the absolute root path of the chroot.
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/// jailPath the path within the jail that the child uses.
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StorageBase(const std::string& localStorePath,
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const std::string& jailPath,
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const std::string& uri) :
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_localStorePath(localStorePath),
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_jailPath(jailPath),
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_uri(uri)
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{
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Log::debug("Storage ctor: " + uri);
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}
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std::string getLocalRootPath() const
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{
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auto localPath = _jailPath;
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if (localPath[0] == '/')
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{
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// Remove the leading /
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localPath.erase(0, 1);
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}
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// /chroot/jailId/user/doc/childId
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const auto rootPath = Poco::Path(_localStorePath, localPath);
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Poco::File(rootPath).createDirectories();
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return rootPath.toString();
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}
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const std::string& getUri() const { return _uri; }
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/// Returns information about the file.
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virtual FileInfo getFileInfo(const Poco::URI& uri) = 0;
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/// Returns a local file path for the given URI.
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/// If necessary copies the file locally first.
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virtual std::string loadStorageFileToLocal() = 0;
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/// Writes the contents of the file back to the source.
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/// TODO: Should we save to the specific client's URI?
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/// The advantage is that subseqent views (to the first)
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/// will not depend on the token of the first.
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virtual bool saveLocalFileToStorage() = 0;
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static
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size_t getFileSize(const std::string& filename)
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{
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return std::ifstream(filename, std::ifstream::ate | std::ifstream::binary).tellg();
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}
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protected:
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const std::string _localStorePath;
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const std::string _jailPath;
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const std::string _uri;
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std::string _jailedFilePath;
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FileInfo _fileInfo;
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};
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/// Trivial implementation of local storage that does not need do anything.
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class LocalStorage : public StorageBase
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{
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public:
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LocalStorage(const std::string& localStorePath,
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const std::string& jailPath,
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const std::string& uri) :
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StorageBase(localStorePath, jailPath, uri),
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_isCopy(false)
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{
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}
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FileInfo getFileInfo(const Poco::URI& uri) override
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{
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const auto path = uri.getPath();
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Log::debug("Getting info for local uri [" + uri.toString() + "], path [" + path + "].");
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const auto filename = Poco::Path(path).getFileName();
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const auto lastModified = Poco::File(path).getLastModified();
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const auto size = Poco::File(path).getSize();
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return FileInfo({filename, lastModified, size});
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}
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std::string loadStorageFileToLocal() override
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{
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const auto rootPath = getLocalRootPath();
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// /chroot/jailId/user/doc/childId/file.ext
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const auto filename = Poco::Path(_uri).getFileName();
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_jailedFilePath = Poco::Path(rootPath, filename).toString();
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Log::info("Public URI [" + _uri +
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"] jailed to [" + _jailedFilePath + "].");
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const auto publicFilePath = _uri;
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Log::info("Linking " + publicFilePath + " to " + _jailedFilePath);
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if (!Poco::File(_jailedFilePath).exists() && link(publicFilePath.c_str(), _jailedFilePath.c_str()) == -1)
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{
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// Failed
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Log::warn("link(\"" + publicFilePath + "\", \"" + _jailedFilePath + "\") failed. Will copy.");
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}
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try
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{
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// Fallback to copying.
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if (!Poco::File(_jailedFilePath).exists())
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{
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Log::info("Copying " + publicFilePath + " to " + _jailedFilePath);
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Poco::File(publicFilePath).copyTo(_jailedFilePath);
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_isCopy = true;
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}
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}
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catch (const Poco::Exception& exc)
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{
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Log::error("copyTo(\"" + publicFilePath + "\", \"" + _jailedFilePath + "\") failed: " + exc.displayText());
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throw;
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}
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// Now return the jailed path.
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return Poco::Path(_jailPath, filename).toString();
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}
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bool saveLocalFileToStorage() override
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{
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try
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{
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// Copy the file back.
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if (_isCopy && Poco::File(_jailedFilePath).exists())
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{
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Log::info("Copying " + _jailedFilePath + " to " + _uri);
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Poco::File(_jailedFilePath).copyTo(_uri);
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}
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}
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catch (const Poco::Exception& exc)
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{
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Log::error("copyTo(\"" + _jailedFilePath + "\", \"" + _uri + "\") failed: " + exc.displayText());
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throw;
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}
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return true;
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}
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private:
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/// True if the jailed file is not linked but copied.
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bool _isCopy;
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};
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class WopiStorage : public StorageBase
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{
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public:
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WopiStorage(const std::string& localStorePath,
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const std::string& jailPath,
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const std::string& uri) :
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StorageBase(localStorePath, jailPath, uri)
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{
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}
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FileInfo getFileInfo(const Poco::URI& uri) override
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{
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Log::debug("Getting info for wopi uri [" + uri.toString() + "].");
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Poco::URI uriObject(uri);
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Poco::Net::HTTPSClientSession session(uriObject.getHost(), uriObject.getPort(), Poco::Net::SSLManager::instance().defaultClientContext());
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Poco::Net::HTTPRequest request(Poco::Net::HTTPRequest::HTTP_GET, uriObject.getPathAndQuery(), Poco::Net::HTTPMessage::HTTP_1_1);
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request.set("User-Agent", "LOOLWSD WOPI Agent");
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session.sendRequest(request);
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Poco::Net::HTTPResponse response;
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std::istream& rs = session.receiveResponse(response);
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auto logger = Log::trace();
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logger << "WOPI::CheckFileInfo header for URI [" << uri.toString() << "]:\n";
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for (auto& pair : response)
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{
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logger << '\t' + pair.first + ": " + pair.second << " / ";
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}
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logger << Log::end;
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// Parse the response.
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std::string filename;
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size_t size = 0;
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std::string resMsg;
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Poco::StreamCopier::copyToString(rs, resMsg);
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Log::debug("WOPI::CheckFileInfo returned: " + resMsg);
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const auto index = resMsg.find_first_of("{");
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if (index != std::string::npos)
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{
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const std::string stringJSON = resMsg.substr(index);
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Poco::JSON::Parser parser;
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const auto result = parser.parse(stringJSON);
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const auto object = result.extract<Poco::JSON::Object::Ptr>();
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filename = object->get("BaseFileName").toString();
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size = std::stoul (object->get("Size").toString(), nullptr, 0);
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}
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// WOPI doesn't support file last modified time.
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return FileInfo({filename, Poco::Timestamp(), size});
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}
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/// uri format: http://server/<...>/wopi*/files/<id>/content
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std::string loadStorageFileToLocal() override
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{
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Log::info("Downloading URI [" + _uri + "].");
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_fileInfo = getFileInfo(Poco::URI(_uri));
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if (_fileInfo.Size == 0 && _fileInfo.Filename.empty())
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{
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//TODO: Should throw a more appropriate exception.
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throw std::runtime_error("Failed to load file from storage.");
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}
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// WOPI URI to download files ends in '/contents'.
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// Add it here to get the payload instead of file info.
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Poco::URI uriObject(_uri);
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const auto url = uriObject.getPath() + "/contents?" + uriObject.getQuery();
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Log::debug("Wopi requesting: " + url);
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Poco::Net::HTTPSClientSession session(uriObject.getHost(), uriObject.getPort(), Poco::Net::SSLManager::instance().defaultClientContext());
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Poco::Net::HTTPRequest request(Poco::Net::HTTPRequest::HTTP_GET, url, Poco::Net::HTTPMessage::HTTP_1_1);
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request.set("User-Agent", "LOOLWSD WOPI Agent");
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session.sendRequest(request);
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Poco::Net::HTTPResponse response;
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std::istream& rs = session.receiveResponse(response);
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auto logger = Log::trace();
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logger << "WOPI::GetFile header for URI [" << _uri << "]:\n";
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for (auto& pair : response)
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{
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logger << '\t' + pair.first + ": " + pair.second << " / ";
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}
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logger << Log::end;
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_jailedFilePath = Poco::Path(getLocalRootPath(), _fileInfo.Filename).toString();
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std::ofstream ofs(_jailedFilePath);
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std::copy(std::istreambuf_iterator<char>(rs),
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std::istreambuf_iterator<char>(),
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std::ostreambuf_iterator<char>(ofs));
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const auto size = getFileSize(_jailedFilePath);
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Log::info() << "WOPI::GetFile downloaded " << size << " bytes from [" << _uri
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<< "] -> " << _jailedFilePath << ": "
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<< response.getStatus() << " " << response.getReason() << Log::end;
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// Now return the jailed path.
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return Poco::Path(_jailPath, _fileInfo.Filename).toString();
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}
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bool saveLocalFileToStorage() override
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{
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Log::info("Uploading URI [" + _uri + "] from [" + _jailedFilePath + "].");
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const auto size = getFileSize(_jailedFilePath);
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Poco::URI uriObject(_uri);
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const auto url = uriObject.getPath() + "/contents?" + uriObject.getQuery();
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Log::debug("Wopi posting: " + url);
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Poco::Net::HTTPSClientSession session(uriObject.getHost(), uriObject.getPort(), Poco::Net::SSLManager::instance().defaultClientContext());
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Poco::Net::HTTPRequest request(Poco::Net::HTTPRequest::HTTP_POST, url, Poco::Net::HTTPMessage::HTTP_1_1);
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request.set("X-WOPIOverride", "PUT");
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request.setContentType("application/octet-stream");
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request.setContentLength(size);
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std::ostream& os = session.sendRequest(request);
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std::ifstream ifs(_jailedFilePath);
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Poco::StreamCopier::copyStream(ifs, os);
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Poco::Net::HTTPResponse response;
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std::istream& rs = session.receiveResponse(response);
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std::ostringstream oss;
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Poco::StreamCopier::copyStream(rs, oss);
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Log::info("WOPI::PutFile response: " + oss.str());
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const auto success = (response.getStatus() == Poco::Net::HTTPResponse::HTTP_OK);
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Log::info() << "WOPI::PutFile uploaded " << size << " bytes from [" << _jailedFilePath << "]:"
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<< "] -> [" << _uri << "]: "
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<< response.getStatus() << " " << response.getReason() << Log::end;
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return success;
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}
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};
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class WebDAVStorage : public StorageBase
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{
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public:
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WebDAVStorage(const std::string& localStorePath,
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const std::string& jailPath,
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const std::string& uri,
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std::unique_ptr<AuthBase> authAgent) :
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StorageBase(localStorePath, jailPath, uri),
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_authAgent(std::move(authAgent))
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{
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}
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FileInfo getFileInfo(const Poco::URI& uri) override
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{
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Log::debug("Getting info for webdav uri [" + uri.toString() + "].");
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(void)uri;
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assert(!"Not Implemented!");
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return FileInfo({"bazinga", Poco::Timestamp(), 0});
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}
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std::string loadStorageFileToLocal() override
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{
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// TODO: implement webdav GET.
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return _uri;
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}
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bool saveLocalFileToStorage() override
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{
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// TODO: implement webdav PUT.
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return false;
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}
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private:
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std::unique_ptr<AuthBase> _authAgent;
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};
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inline
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std::unique_ptr<StorageBase> createStorage(const std::string& jailRoot, const std::string& jailPath, const Poco::URI& uri)
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{
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if (uri.isRelative() || uri.getScheme() == "file")
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{
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Log::info("Public URI [" + uri.toString() + "] is a file.");
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return std::unique_ptr<StorageBase>(new LocalStorage(jailRoot, jailPath, uri.getPath()));
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}
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else
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{
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Log::info("Public URI [" + uri.toString() +
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"] assuming cloud storage.");
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//TODO: Configure the storage to use. For now, assume it's WOPI.
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return std::unique_ptr<StorageBase>(new WopiStorage(jailRoot, jailPath, uri.toString()));
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}
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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