libreoffice-online/loolwsd/Storage.hpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
// Storage abstraction.
#ifndef INCLUDED_STORAGE_HPP
#define INCLUDED_STORAGE_HPP
#include <string>
#include <fstream>
#include <Poco/Net/HTTPResponse.h>
#include "Common.hpp"
#include "Auth.hpp"
#include "Util.hpp"
/// Base class of all Storage abstractions.
class StorageBase
{
public:
/// localStorePath the absolute root path of the chroot.
/// jailPath the path within the jail that the child uses.
StorageBase(const std::string& localStorePath,
const std::string& jailPath) :
_localStorePath(localStorePath),
_jailPath(jailPath)
{
}
std::string getRootPath() const
{
auto localPath = _jailPath;
if (localPath[0] == '/')
{
// Remove the leading /
localPath.erase(0, 1);
}
// /chroot/jailId/user/doc/childId
const auto rootPath = Poco::Path(_localStorePath, localPath);
Poco::File(rootPath).createDirectories();
return rootPath.toString();
}
/// Returns a local file path given a URI or ID.
/// If necessary copies the file locally first.
virtual std::string getFilePathFromURI(const std::string& uri) = 0;
/// Writes the contents of the file back to the source.
virtual bool restoreFileToURI(const std::string& path, const std::string& uri) = 0;
protected:
const std::string _localStorePath;
const std::string _jailPath;
};
/// Trivial implementation of local storage that does not need do anything.
class LocalStorage : public StorageBase
{
public:
LocalStorage(const std::string& localStorePath,
const std::string& jailPath) :
StorageBase(localStorePath, jailPath)
{
}
std::string getFilePathFromURI(const std::string& uri) override
{
const auto rootPath = getRootPath();
// /chroot/jailId/user/doc/childId/file.ext
const auto filename = Poco::Path(uri).getFileName();
const auto jailedFilePath = Poco::Path(rootPath, filename).toString();
Log::info("Public URI [" + uri +
"] jailed to [" + jailedFilePath + "].");
const auto publicFilePath = uri;
Log::info("Linking " + publicFilePath + " to " + jailedFilePath);
if (!Poco::File(jailedFilePath).exists() && link(publicFilePath.c_str(), jailedFilePath.c_str()) == -1)
{
// Failed
Log::error("link(\"" + publicFilePath + "\", \"" + jailedFilePath + "\") failed.");
}
try
{
// Fallback to copying.
if (!Poco::File(jailedFilePath).exists())
{
Log::info("Copying " + publicFilePath + " to " + jailedFilePath);
Poco::File(publicFilePath).copyTo(jailedFilePath);
}
}
catch (const Poco::Exception& exc)
{
Log::error("copyTo(\"" + publicFilePath + "\", \"" + jailedFilePath + "\") failed: " + exc.displayText());
throw;
}
// Now return the jailed path.
return Poco::Path(_jailPath, filename).toString();
}
bool restoreFileToURI(const std::string& path, const std::string& uri) override
{
// Nothing to do.
(void)path;
(void)uri;
return false;
}
};
class WopiStorage : public StorageBase
{
public:
WopiStorage(const std::string& localStorePath,
const std::string& jailPath) :
StorageBase(localStorePath, jailPath)
{
}
/// uri format: http://server/<...>/wopi*/files/<id>/content
std::string getFilePathFromURI(const std::string& uri) override
{
Poco::URI uriObject(uri);
Poco::Net::HTTPClientSession session(uriObject.getHost(), uriObject.getPort());
Poco::Net::HTTPRequest request(Poco::Net::HTTPRequest::HTTP_GET, uri, Poco::Net::HTTPMessage::HTTP_1_1);
Poco::Net::HTTPResponse response;
session.sendRequest(request);
std::istream& rs = session.receiveResponse(response);
Log::info() << "WOPI::GetFile Status: " << response.getStatus() << " " << response.getReason() << Log::end;
//TODO: Get proper filename.
const std::string local_filename = _localStorePath + "/filename";
std::ofstream ofs(local_filename);
std::copy(std::istreambuf_iterator<char>(rs),
std::istreambuf_iterator<char>(),
std::ostreambuf_iterator<char>(ofs));
return local_filename;
}
bool restoreFileToURI(const std::string& path, const std::string& uri) override
{
Poco::URI uriObject(uri);
Poco::Net::HTTPClientSession session(uriObject.getHost(), uriObject.getPort());
Poco::Net::HTTPRequest request(Poco::Net::HTTPRequest::HTTP_POST, uri, Poco::Net::HTTPMessage::HTTP_1_1);
std::ifstream ifs(path);
request.read(ifs);
Poco::Net::HTTPResponse response;
session.sendRequest(request);
Log::info() << "WOPI::PutFile Status: " << response.getStatus() << " " << response.getReason() << Log::end;
return (response.getStatus() == Poco::Net::HTTPResponse::HTTP_OK);
}
};
class WebDAVStorage : public StorageBase
{
public:
WebDAVStorage(const std::string& localStorePath,
const std::string& jailPath,
const std::string& url,
std::unique_ptr<AuthBase> authAgent) :
StorageBase(localStorePath, jailPath),
_url(url),
_authAgent(std::move(authAgent))
{
}
std::string getFilePathFromURI(const std::string& uri) override
{
// TODO: implement webdav GET.
return uri;
}
bool restoreFileToURI(const std::string& path, const std::string& uri) override
{
// TODO: implement webdav PUT.
(void)path;
(void)uri;
return false;
}
private:
const std::string _url;
std::unique_ptr<AuthBase> _authAgent;
};
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */