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Diffstat (limited to 'extensions/source/update/check/download.cxx')
| -rw-r--r-- | extensions/source/update/check/download.cxx | 426 |
1 files changed, 426 insertions, 0 deletions
diff --git a/extensions/source/update/check/download.cxx b/extensions/source/update/check/download.cxx new file mode 100644 index 0000000000..f96d6ecd49 --- /dev/null +++ b/extensions/source/update/check/download.cxx @@ -0,0 +1,426 @@ +/* -*- 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 <sal/config.h> + +#include <string_view> + +#include <curl/curl.h> + +#include <systools/curlinit.hxx> + +#include <o3tl/string_view.hxx> +#include <osl/diagnose.h> +#include <osl/file.h> +#include <com/sun/star/beans/PropertyValue.hpp> +#include <com/sun/star/configuration/theDefaultProvider.hpp> +#include <com/sun/star/container/XNameAccess.hpp> +#include <com/sun/star/lang/XMultiServiceFactory.hpp> + +#include "download.hxx" + +namespace beans = com::sun::star::beans ; +namespace container = com::sun::star::container ; +namespace lang = com::sun::star::lang ; +namespace uno = com::sun::star::uno ; + +namespace { + +struct OutData +{ + rtl::Reference< DownloadInteractionHandler >Handler; + OUString File; + OUString DestinationDir; + oslFileHandle FileHandle; + sal_uInt64 Offset; + osl::Condition& StopCondition; + CURL *curl; + + explicit OutData(osl::Condition& rCondition) : FileHandle(nullptr), Offset(0), StopCondition(rCondition), curl(nullptr) {}; +}; + +} + +static void openFile( OutData& out ) +{ + char * effective_url; + curl_easy_getinfo(out.curl, CURLINFO_EFFECTIVE_URL, &effective_url); + + curl_off_t nDownloadSize; + curl_easy_getinfo(out.curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T, &nDownloadSize); + + OString aURL(effective_url); + + // ensure no trailing '/' + sal_Int32 nLen = aURL.getLength(); + while( (nLen > 0) && ('/' == aURL[nLen-1]) ) + aURL = aURL.copy(0, --nLen); + + // extract file name last '/' + sal_Int32 nIndex = aURL.lastIndexOf('/'); + if( nIndex > 0 ) + { + out.File = out.DestinationDir + + OStringToOUString(aURL.subView(nIndex), RTL_TEXTENCODING_UTF8); + + oslFileError rc; + + // Give the user an overwrite warning if the target file exists + const sal_Int32 openFlags = osl_File_OpenFlag_Write | osl_File_OpenFlag_Create; + do + { + rc = osl_openFile(out.File.pData, &out.FileHandle, openFlags); + + if( osl_File_E_EXIST == rc && ! out.Handler->downloadTargetExists(out.File) ) + { + out.StopCondition.set(); + break; + } + + } while( osl_File_E_EXIST == rc ); + + if( osl_File_E_None == rc ) + out.Handler->downloadStarted(out.File, static_cast<sal_Int64>(nDownloadSize)); + } +} + + +static OString +getStringValue(const uno::Reference< container::XNameAccess >& xNameAccess, const OUString& aName) +{ + OSL_ASSERT(xNameAccess->hasByName(aName)); + uno::Any aValue = xNameAccess->getByName(aName); + + return OUStringToOString(aValue.get<OUString>(), RTL_TEXTENCODING_UTF8); +} + + +static sal_Int32 +getInt32Value(const uno::Reference< container::XNameAccess >& xNameAccess, + const OUString& aName) +{ + OSL_ASSERT(xNameAccess->hasByName(aName)); + uno::Any aValue = xNameAccess->getByName(aName); + + sal_Int32 n = -1; + aValue >>= n; + return n; +} + + +static size_t +write_function( void *ptr, size_t size, size_t nmemb, void *stream ) +{ + OutData *out = static_cast < OutData * > (stream); + + if( nullptr == out->FileHandle ) + openFile(*out); + + sal_uInt64 nBytesWritten = 0; + + if( nullptr != out->FileHandle ) + osl_writeFile(out->FileHandle, ptr, size * nmemb, &nBytesWritten); + + return static_cast<size_t>(nBytesWritten); +} + + +static int +progress_callback( void *clientp, curl_off_t dltotal, curl_off_t dlnow, SAL_UNUSED_PARAMETER curl_off_t, SAL_UNUSED_PARAMETER curl_off_t) +{ + OutData *out = static_cast < OutData * > (clientp); + + assert(out); + + if (out && !out->StopCondition.check()) + { + float fPercent = 0; + if ( dltotal + out->Offset ) + fPercent = (dlnow + out->Offset) * 100 / (dltotal + out->Offset); + if( fPercent < 0 ) + fPercent = 0; + + // Do not report progress for redirection replies + long nCode; + curl_easy_getinfo(out->curl, CURLINFO_RESPONSE_CODE, &nCode); + if( (nCode != 302) && (nCode != 303) && (dltotal > 0) ) + out->Handler->downloadProgressAt(static_cast<sal_Int8>(fPercent)); + + return 0; + } + + // If stop condition is set, return non 0 value to abort + return -1; +} + + +void +Download::getProxyForURL(std::u16string_view rURL, OString& rHost, sal_Int32& rPort) const +{ + uno::Reference< lang::XMultiServiceFactory > xConfigProvider( + css::configuration::theDefaultProvider::get( m_xContext ) ); + + beans::PropertyValue aProperty; + aProperty.Name = "nodepath"; + aProperty.Value <<= OUString("org.openoffice.Inet/Settings"); + + uno::Sequence< uno::Any > aArgumentList{ uno::Any(aProperty) }; + + uno::Reference< container::XNameAccess > xNameAccess( + xConfigProvider->createInstanceWithArguments( + "com.sun.star.configuration.ConfigurationAccess", aArgumentList ), + uno::UNO_QUERY_THROW ); + + OSL_ASSERT(xNameAccess->hasByName("ooInetProxyType")); + uno::Any aValue = xNameAccess->getByName("ooInetProxyType"); + + sal_Int32 nProxyType = aValue.get< sal_Int32 >(); + if( 0 != nProxyType ) // type 0 means "direct connection to the internet + { + if( o3tl::starts_with(rURL, u"http:") ) + { + rHost = getStringValue(xNameAccess, "ooInetHTTPProxyName"); + rPort = getInt32Value(xNameAccess, "ooInetHTTPProxyPort"); + } + else if( o3tl::starts_with(rURL, u"https:") ) + { + rHost = getStringValue(xNameAccess, "ooInetHTTPSProxyName"); + rPort = getInt32Value(xNameAccess, "ooInetHTTPSProxyPort"); + } + } +} + + +static bool curl_run(std::u16string_view rURL, OutData& out, const OString& aProxyHost, sal_Int32 nProxyPort) +{ + /* Need to investigate further whether it is necessary to call + * curl_global_init or not - leave it for now (as the ftp UCB content + * provider does as well). + */ + + CURL * pCURL = curl_easy_init(); + bool ret = false; + + if( nullptr != pCURL ) + { + ::InitCurl_easy(pCURL); + + out.curl = pCURL; + + OString aURL(OUStringToOString(rURL, RTL_TEXTENCODING_UTF8)); + (void)curl_easy_setopt(pCURL, CURLOPT_URL, aURL.getStr()); + + // abort on http errors + (void)curl_easy_setopt(pCURL, CURLOPT_FAILONERROR, 1); + + // enable redirection + (void)curl_easy_setopt(pCURL, CURLOPT_FOLLOWLOCATION, 1); + // only allow redirect to https:// +#if (LIBCURL_VERSION_MAJOR > 7) || (LIBCURL_VERSION_MAJOR == 7 && LIBCURL_VERSION_MINOR >= 85) + (void)curl_easy_setopt(pCURL, CURLOPT_REDIR_PROTOCOLS_STR, "https"); +#else + (void)curl_easy_setopt(pCURL, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTPS); +#endif + + // write function + (void)curl_easy_setopt(pCURL, CURLOPT_WRITEDATA, &out); + (void)curl_easy_setopt(pCURL, CURLOPT_WRITEFUNCTION, &write_function); + + // progress handler - Condition::check unfortunately is not defined const + (void)curl_easy_setopt(pCURL, CURLOPT_NOPROGRESS, 0); + (void)curl_easy_setopt(pCURL, CURLOPT_XFERINFOFUNCTION, &progress_callback); + (void)curl_easy_setopt(pCURL, CURLOPT_PROGRESSDATA, &out); + + // proxy + (void)curl_easy_setopt(pCURL, CURLOPT_PROXY, aProxyHost.getStr()); + (void)curl_easy_setopt(pCURL, CURLOPT_PROXYTYPE, CURLPROXY_HTTP); + if( -1 != nProxyPort ) + (void)curl_easy_setopt(pCURL, CURLOPT_PROXYPORT, nProxyPort); + + if( out.Offset > 0 ) + { + // curl_off_t offset = nOffset; libcurl seems to be compiled with large + // file support (and we not) .. + sal_Int64 offset = static_cast<sal_Int64>(out.Offset); + (void)curl_easy_setopt(pCURL, CURLOPT_RESUME_FROM_LARGE, offset); + } + + CURLcode cc = curl_easy_perform(pCURL); + + // treat zero byte downloads as errors + if( nullptr == out.FileHandle ) + openFile(out); + + if( CURLE_OK == cc ) + { + out.Handler->downloadFinished(out.File); + ret = true; + } + + if ( CURLE_PARTIAL_FILE == cc ) + { + // this sometimes happens, when a user throws away his user data, but has already + // completed the download of an update. + curl_off_t nDownloadSize; + curl_easy_getinfo( pCURL, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T, &nDownloadSize ); + if ( -1 == nDownloadSize ) + { + out.Handler->downloadFinished(out.File); + ret = true; + } + } + + // Avoid target file being removed + else if( (CURLE_ABORTED_BY_CALLBACK == cc) || out.StopCondition.check() ) + ret = true; + + // Only report errors when not stopped + else + { + OString aMessage("Unknown error"_ostr); + + const char * error_message = curl_easy_strerror(cc); + if( nullptr != error_message ) + aMessage = error_message; + + if ( CURLE_HTTP_RETURNED_ERROR == cc ) + { + long nError; + curl_easy_getinfo( pCURL, CURLINFO_RESPONSE_CODE, &nError ); + + if ( 403 == nError ) + aMessage += " 403: Access denied!"; + else if ( 404 == nError ) + aMessage += " 404: File not found!"; + else if ( 416 == nError ) + { + // we got this error probably, because we already downloaded the file + out.Handler->downloadFinished(out.File); + ret = true; + } + else + { + aMessage += ":error code = " + OString::number( nError ) + " !"; + } + } + if ( !ret ) + out.Handler->downloadStalled( OStringToOUString(aMessage, RTL_TEXTENCODING_UTF8) ); + } + + curl_easy_cleanup(pCURL); + } + + return ret; +} + + +bool +Download::start(const OUString& rURL, const OUString& rFile, const OUString& rDestinationDir) +{ + OSL_ASSERT( m_aHandler.is() ); + + OutData out(m_aCondition); + OUString aFile( rFile ); + + // when rFile is empty, there is no remembered file name. If there is already a file with the + // same name ask the user if she wants to resume a download or restart the download + if ( aFile.isEmpty() ) + { + // GetFileName() + OUString aURL( rURL ); + // ensure no trailing '/' + sal_Int32 nLen = aURL.getLength(); + while( (nLen > 0) && ('/' == aURL[ nLen-1 ]) ) + aURL = aURL.copy( 0, --nLen ); + + // extract file name last '/' + sal_Int32 nIndex = aURL.lastIndexOf('/'); + aFile = rDestinationDir + aURL.subView( nIndex ); + + // check for existing file + oslFileError rc = osl_openFile( aFile.pData, &out.FileHandle, osl_File_OpenFlag_Write | osl_File_OpenFlag_Create ); + osl_closeFile(out.FileHandle); + out.FileHandle = nullptr; + + if( osl_File_E_EXIST == rc ) + { + if ( m_aHandler->checkDownloadDestination( aURL.copy( nIndex+1 ) ) ) + { + osl_removeFile( aFile.pData ); + aFile.clear(); + } + else + m_aHandler->downloadStarted( aFile, 0 ); + } + else + { + osl_removeFile( aFile.pData ); + aFile.clear(); + } + } + + out.File = aFile; + out.DestinationDir = rDestinationDir; + out.Handler = m_aHandler; + + if( !aFile.isEmpty() ) + { + oslFileError rc = osl_openFile(aFile.pData, &out.FileHandle, osl_File_OpenFlag_Write); + + if( osl_File_E_None == rc ) + { + // Set file pointer to the end of the file on resume + if( osl_File_E_None == osl_setFilePos(out.FileHandle, osl_Pos_End, 0) ) + { + osl_getFilePos(out.FileHandle, &out.Offset); + } + } + else if( osl_File_E_NOENT == rc ) // file has been deleted meanwhile .. + out.File.clear(); + } + + OString aProxyHost; + sal_Int32 nProxyPort = -1; + getProxyForURL(rURL, aProxyHost, nProxyPort); + + bool ret = curl_run(rURL, out, aProxyHost, nProxyPort); + + if( nullptr != out.FileHandle ) + { + osl_syncFile(out.FileHandle); + osl_closeFile(out.FileHandle); + +// #i90930# Don't remove already downloaded bits, when curl_run reports an error +// because later calls might be successful +// if( ! ret ) +// osl_removeFile(out.File.pData); + } + + m_aCondition.reset(); + return ret; +} + + +void +Download::stop() +{ + m_aCondition.set(); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |