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 "CachedResourceRequest.h"
33#include "RuntimeApplicationChecks.h"
34#include "SharedBuffer.h"
35#include "TextResourceDecoder.h"
36
37namespace WebCore {
38
39CachedScript::CachedScript(CachedResourceRequest&& request, const PAL::SessionID& sessionID, const CookieJar* cookieJar)
40 : CachedResource(WTFMove(request), Type::Script, sessionID, cookieJar)
41 , m_decoder(TextResourceDecoder::create("text/javascript"_s, request.charset()))
42{
43}
44
45CachedScript::~CachedScript() = default;
46
47void CachedScript::setEncoding(const String& chs)
48{
49 m_decoder->setEncoding(chs, TextResourceDecoder::EncodingFromHTTPHeader);
50}
51
52String CachedScript::encoding() const
53{
54 return m_decoder->encoding().name();
55}
56
57StringView CachedScript::script()
58{
59 if (!m_data)
60 return { };
61
62 if (m_decodingState == NeverDecoded
63 && TextEncoding(encoding()).isByteBasedEncoding()
64 && m_data->size()
65 && charactersAreAllASCII(reinterpret_cast<const LChar*>(m_data->data()), m_data->size())) {
66
67 m_decodingState = DataAndDecodedStringHaveSameBytes;
68
69 // If the encoded and decoded data are the same, there is no decoded data cost!
70 setDecodedSize(0);
71 m_decodedDataDeletionTimer.stop();
72
73 m_scriptHash = StringHasher::computeHashAndMaskTop8Bits(reinterpret_cast<const LChar*>(m_data->data()), m_data->size());
74 }
75
76 if (m_decodingState == DataAndDecodedStringHaveSameBytes)
77 return { reinterpret_cast<const LChar*>(m_data->data()), static_cast<unsigned>(m_data->size()) };
78
79 if (!m_script) {
80 m_script = m_decoder->decodeAndFlush(m_data->data(), encodedSize());
81 ASSERT(!m_scriptHash || m_scriptHash == m_script.impl()->hash());
82 if (m_decodingState == NeverDecoded)
83 m_scriptHash = m_script.impl()->hash();
84 m_decodingState = DataAndDecodedStringHaveDifferentBytes;
85 setDecodedSize(m_script.sizeInBytes());
86 }
87
88 m_decodedDataDeletionTimer.restart();
89 return m_script;
90}
91
92unsigned CachedScript::scriptHash()
93{
94 if (m_decodingState == NeverDecoded)
95 script();
96 return m_scriptHash;
97}
98
99void CachedScript::finishLoading(SharedBuffer* data)
100{
101 m_data = data;
102 setEncodedSize(data ? data->size() : 0);
103 CachedResource::finishLoading(data);
104}
105
106void CachedScript::destroyDecodedData()
107{
108 m_script = String();
109 setDecodedSize(0);
110}
111
112void CachedScript::setBodyDataFrom(const CachedResource& resource)
113{
114 ASSERT(resource.type() == type());
115 auto& script = static_cast<const CachedScript&>(resource);
116
117 CachedResource::setBodyDataFrom(resource);
118
119 m_script = script.m_script;
120 m_scriptHash = script.m_scriptHash;
121 m_decodingState = script.m_decodingState;
122 m_decoder = script.m_decoder;
123}
124
125bool CachedScript::shouldIgnoreHTTPStatusCodeErrors() const
126{
127#if PLATFORM(MAC)
128 // This is a workaround for <rdar://problem/13916291>
129 // REGRESSION (r119759): Adobe Flash Player "smaller" installer relies on the incorrect firing
130 // of a load event and needs an app-specific hack for compatibility.
131 // The installer in question tries to load .js file that doesn't exist, causing the server to
132 // return a 404 response. Normally, this would trigger an error event to be dispatched, but the
133 // installer expects a load event instead so we work around it here.
134 if (MacApplication::isSolidStateNetworksDownloader())
135 return true;
136#endif
137
138 return CachedResource::shouldIgnoreHTTPStatusCodeErrors();
139}
140
141} // namespace WebCore
142