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 "core/fetch/ScriptResource.h"
29
30 #include "core/fetch/TextResourceDecoder.h"
31 #include "platform/MIMETypeRegistry.h"
32 #include "platform/SharedBuffer.h"
33 #include "platform/network/HTTPParsers.h"
34
35 namespace WebCore {
36
ScriptResource(const ResourceRequest & resourceRequest,const String & charset)37 ScriptResource::ScriptResource(const ResourceRequest& resourceRequest, const String& charset)
38 : Resource(resourceRequest, Script)
39 , m_decoder(TextResourceDecoder::create("application/javascript", charset))
40 {
41 DEFINE_STATIC_LOCAL(const AtomicString, acceptScript, ("*/*", AtomicString::ConstructFromLiteral));
42
43 // It's javascript we want.
44 // But some websites think their scripts are <some wrong mimetype here>
45 // and refuse to serve them if we only accept application/x-javascript.
46 setAccept(acceptScript);
47 }
48
~ScriptResource()49 ScriptResource::~ScriptResource()
50 {
51 }
52
setEncoding(const String & chs)53 void ScriptResource::setEncoding(const String& chs)
54 {
55 m_decoder->setEncoding(chs, TextResourceDecoder::EncodingFromHTTPHeader);
56 }
57
encoding() const58 String ScriptResource::encoding() const
59 {
60 return m_decoder->encoding().name();
61 }
62
mimeType() const63 AtomicString ScriptResource::mimeType() const
64 {
65 return extractMIMETypeFromMediaType(m_response.httpHeaderField("Content-Type")).lower();
66 }
67
script()68 const String& ScriptResource::script()
69 {
70 ASSERT(!isPurgeable());
71 ASSERT(isLoaded());
72
73 if (!m_script && m_data) {
74 String script = m_decoder->decode(m_data->data(), encodedSize());
75 script.append(m_decoder->flush());
76 m_data.clear();
77 // We lie a it here and claim that script counts as encoded data (even though it's really decoded data).
78 // That's because the MemoryCache thinks that it can clear out decoded data by calling destroyDecodedData(),
79 // but we can't destroy script in destroyDecodedData because that's our only copy of the data!
80 setEncodedSize(script.sizeInBytes());
81 m_script = script;
82 }
83
84 return m_script.string();
85 }
86
mimeTypeAllowedByNosniff() const87 bool ScriptResource::mimeTypeAllowedByNosniff() const
88 {
89 return parseContentTypeOptionsHeader(m_response.httpHeaderField("X-Content-Type-Options")) != ContentTypeOptionsNosniff || MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType());
90 }
91
92 } // namespace WebCore
93