1/* 2 Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de) 3 Copyright (C) 2001 Dirk Mueller (mueller@kde.org) 4 Copyright (C) 2002 Waldo Bastian (bastian@kde.org) 5 Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com) 6 Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. 7 8 This library is free software; you can redistribute it and/or 9 modify it under the terms of the GNU Library General Public 10 License as published by the Free Software Foundation; either 11 version 2 of the License, or (at your option) any later version. 12 13 This library is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 Library General Public License for more details. 17 18 You should have received a copy of the GNU Library General Public License 19 along with this library; see the file COPYING.LIB. If not, write to 20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 21 Boston, MA 02110-1301, USA. 22 23 This class provides all functionality needed for loading images, style sheets and html 24 pages from the web. It has a memory cache for these objects. 25*/ 26 27#include "config.h" 28#include "CachedScript.h" 29 30#include "CachedResourceClient.h" 31#include "CachedResourceClientWalker.h" 32#include "HTTPHeaderNames.h" 33#include "HTTPParsers.h" 34#include "MIMETypeRegistry.h" 35#include "MemoryCache.h" 36#include "ResourceBuffer.h" 37#include "RuntimeApplicationChecks.h" 38#include "TextResourceDecoder.h" 39#include <wtf/Vector.h> 40 41namespace WebCore { 42 43CachedScript::CachedScript(const ResourceRequest& resourceRequest, const String& charset, SessionID sessionID) 44 : CachedResource(resourceRequest, Script, sessionID) 45 , m_decoder(TextResourceDecoder::create(ASCIILiteral("application/javascript"), charset)) 46{ 47 // It's javascript we want. 48 // But some websites think their scripts are <some wrong mimetype here> 49 // and refuse to serve them if we only accept application/x-javascript. 50 setAccept("*/*"); 51} 52 53CachedScript::~CachedScript() 54{ 55} 56 57void CachedScript::setEncoding(const String& chs) 58{ 59 m_decoder->setEncoding(chs, TextResourceDecoder::EncodingFromHTTPHeader); 60} 61 62String CachedScript::encoding() const 63{ 64 return m_decoder->encoding().name(); 65} 66 67String CachedScript::mimeType() const 68{ 69 return extractMIMETypeFromMediaType(m_response.httpHeaderField(HTTPHeaderName::ContentType)).lower(); 70} 71 72const String& CachedScript::script() 73{ 74 ASSERT(!isPurgeable()); 75 76 if (!m_script && m_data) { 77 m_script = m_decoder->decodeAndFlush(m_data->data(), encodedSize()); 78 setDecodedSize(m_script.sizeInBytes()); 79 } 80 m_decodedDataDeletionTimer.restart(); 81 82 return m_script; 83} 84 85void CachedScript::finishLoading(ResourceBuffer* data) 86{ 87 m_data = data; 88 setEncodedSize(m_data.get() ? m_data->size() : 0); 89 CachedResource::finishLoading(data); 90} 91 92void CachedScript::destroyDecodedData() 93{ 94 m_script = String(); 95 setDecodedSize(0); 96 if (!MemoryCache::shouldMakeResourcePurgeableOnEviction() && isSafeToMakePurgeable()) 97 makePurgeable(true); 98} 99 100#if ENABLE(NOSNIFF) 101bool CachedScript::mimeTypeAllowedByNosniff() const 102{ 103 return !parseContentTypeOptionsHeader(m_response.httpHeaderField(HTTPHeaderName::XContentTypeOptions)) == ContentTypeOptionsNosniff || MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType()); 104} 105#endif 106 107bool CachedScript::shouldIgnoreHTTPStatusCodeErrors() const 108{ 109 // This is a workaround for <rdar://problem/13916291> 110 // REGRESSION (r119759): Adobe Flash Player "smaller" installer relies on the incorrect firing 111 // of a load event and needs an app-specific hack for compatibility. 112 // The installer in question tries to load .js file that doesn't exist, causing the server to 113 // return a 404 response. Normally, this would trigger an error event to be dispatched, but the 114 // installer expects a load event instead so we work around it here. 115 if (applicationIsSolidStateNetworksDownloader()) 116 return true; 117 118 return CachedResource::shouldIgnoreHTTPStatusCodeErrors(); 119} 120 121} // namespace WebCore 122