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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* 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/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <com/sun/star/ucb/XCommandEnvironment.hpp>
#include <com/sun/star/ucb/InsertCommandArgument.hpp>
#include <com/sun/star/ucb/NameClashException.hpp>
#include <com/sun/star/io/WrongFormatException.hpp>
#include <com/sun/star/io/TempFile.hpp>
#include <com/sun/star/io/XStream.hpp>
#include <com/sun/star/io/XInputStream.hpp>
#include <com/sun/star/io/XOutputStream.hpp>
#include <com/sun/star/io/XSeekable.hpp>
#include <com/sun/star/io/XTruncate.hpp>
#include <o3tl/enumrange.hxx>
#include <rtl/string.hxx>
#include <rtl/ustring.hxx>
#include <rtl/ustrbuf.hxx>
#include <comphelper/processfactory.hxx>
#include <ucbhelper/content.hxx>
#include <svl/documentlockfile.hxx>
using namespace ::com::sun::star;
namespace svt {
GenDocumentLockFile::GenDocumentLockFile(const OUString& aLockFileURL)
: LockFileCommon(aLockFileURL)
{
}
GenDocumentLockFile::~GenDocumentLockFile()
{
}
uno::Reference< io::XInputStream > GenDocumentLockFile::OpenStream(std::unique_lock<std::mutex>& /*rGuard*/)
{
uno::Reference < css::ucb::XCommandEnvironment > xEnv;
::ucbhelper::Content aSourceContent( GetURL(), xEnv, comphelper::getProcessComponentContext() );
// the file can be opened readonly, no locking will be done
return aSourceContent.openStream();
}
bool GenDocumentLockFile::CreateOwnLockFile()
{
std::unique_lock aGuard( m_aMutex );
try
{
uno::Reference< io::XStream > xTempFile(
io::TempFile::create( comphelper::getProcessComponentContext() ),
uno::UNO_QUERY_THROW );
uno::Reference< io::XSeekable > xSeekable( xTempFile, uno::UNO_QUERY_THROW );
uno::Reference< io::XInputStream > xInput = xTempFile->getInputStream();
uno::Reference< io::XOutputStream > xOutput = xTempFile->getOutputStream();
if ( !xInput.is() || !xOutput.is() )
throw uno::RuntimeException();
LockFileEntry aNewEntry = GenerateOwnEntry();
WriteEntryToStream( aGuard, aNewEntry, xOutput );
xOutput->closeOutput();
xSeekable->seek( 0 );
uno::Reference < css::ucb::XCommandEnvironment > xEnv;
::ucbhelper::Content aTargetContent( GetURL(), xEnv, comphelper::getProcessComponentContext() );
ucb::InsertCommandArgument aInsertArg;
aInsertArg.Data = xInput;
aInsertArg.ReplaceExisting = false;
uno::Any aCmdArg;
aCmdArg <<= aInsertArg;
aTargetContent.executeCommand( "insert", aCmdArg );
// try to let the file be hidden if possible
try {
aTargetContent.setPropertyValue("IsHidden", uno::Any( true ) );
} catch( uno::Exception& ) {}
}
catch( ucb::NameClashException& )
{
return false;
}
return true;
}
bool GenDocumentLockFile::OverwriteOwnLockFile()
{
std::unique_lock aGuard(m_aMutex);
// allows to overwrite the lock file with the current data
try
{
uno::Reference < css::ucb::XCommandEnvironment > xEnv;
::ucbhelper::Content aTargetContent( GetURL(), xEnv, comphelper::getProcessComponentContext() );
LockFileEntry aNewEntry = GenerateOwnEntry();
uno::Reference< io::XStream > xStream = aTargetContent.openWriteableStreamNoLock();
uno::Reference< io::XOutputStream > xOutput = xStream->getOutputStream();
uno::Reference< io::XTruncate > xTruncate( xOutput, uno::UNO_QUERY_THROW );
xTruncate->truncate();
WriteEntryToStream( aGuard, aNewEntry, xOutput );
xOutput->closeOutput();
}
catch( uno::Exception& )
{
return false;
}
return true;
}
void GenDocumentLockFile::RemoveFile()
{
std::unique_lock aGuard( m_aMutex );
// TODO/LATER: the removing is not atomic, is it possible in general to make it atomic?
LockFileEntry aNewEntry = GenerateOwnEntry();
LockFileEntry aFileData = GetLockDataImpl(aGuard);
if ( aFileData[LockFileComponent::SYSUSERNAME] != aNewEntry[LockFileComponent::SYSUSERNAME]
|| aFileData[LockFileComponent::LOCALHOST] != aNewEntry[LockFileComponent::LOCALHOST]
|| aFileData[LockFileComponent::USERURL] != aNewEntry[LockFileComponent::USERURL] )
throw io::IOException(); // not the owner, access denied
RemoveFileDirectly();
}
void GenDocumentLockFile::RemoveFileDirectly()
{
uno::Reference < css::ucb::XCommandEnvironment > xEnv;
::ucbhelper::Content aCnt(GetURL(), xEnv, comphelper::getProcessComponentContext());
aCnt.executeCommand("delete",
uno::Any(true));
}
LockFileEntry GenDocumentLockFile::GetLockData()
{
std::unique_lock aGuard(m_aMutex);
return GetLockDataImpl(aGuard);
}
DocumentLockFile::DocumentLockFile( std::u16string_view aOrigURL )
: GenDocumentLockFile(GenerateOwnLockFileURL(aOrigURL, u".~lock."))
{
}
DocumentLockFile::~DocumentLockFile()
{
}
void DocumentLockFile::WriteEntryToStream(
std::unique_lock<std::mutex>& /*rGuard*/,
const LockFileEntry& aEntry, const uno::Reference< io::XOutputStream >& xOutput )
{
OUStringBuffer aBuffer(256);
for ( LockFileComponent lft : o3tl::enumrange<LockFileComponent>() )
{
aBuffer.append( EscapeCharacters( aEntry[lft] ) );
if ( lft < LockFileComponent::LAST )
aBuffer.append( ',' );
else
aBuffer.append( ';' );
}
OString aStringData( OUStringToOString( aBuffer, RTL_TEXTENCODING_UTF8 ) );
uno::Sequence< sal_Int8 > aData( reinterpret_cast<sal_Int8 const *>(aStringData.getStr()), aStringData.getLength() );
xOutput->writeBytes( aData );
}
LockFileEntry DocumentLockFile::GetLockDataImpl(std::unique_lock<std::mutex>& rGuard)
{
uno::Reference< io::XInputStream > xInput = OpenStream(rGuard);
if ( !xInput.is() )
throw uno::RuntimeException();
const sal_Int32 nBufLen = 32000;
uno::Sequence< sal_Int8 > aBuffer( nBufLen );
sal_Int32 nRead = xInput->readBytes( aBuffer, nBufLen );
xInput->closeInput();
if ( nRead == nBufLen )
throw io::WrongFormatException();
sal_Int32 nCurPos = 0;
return ParseEntry( aBuffer, nCurPos );
}
} // namespace svt
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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