1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
/*
Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
Copyright (C) 2004-2025 Apple Inc. All rights reserved.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
This class provides all functionality needed for loading images, style sheets and html
pages from the web. It has a memory cache for these objects.
*/
#include "config.h"
#include "CachedScript.h"
#include "CachedResourceClient.h"
#include "CachedResourceRequest.h"
#include "SharedBuffer.h"
#include "TextResourceDecoder.h"
#if PLATFORM(MAC)
#include <wtf/cocoa/RuntimeApplicationChecksCocoa.h>
#endif
namespace WebCore {
CachedScript::CachedScript(CachedResourceRequest&& request, PAL::SessionID sessionID, const CookieJar* cookieJar, ScriptRequiresTelemetry requiresTelemetry)
: CachedResource(WTFMove(request), Type::Script, sessionID, cookieJar)
, m_requiresTelemetry(requiresTelemetry == ScriptRequiresTelemetry::Yes)
, m_decoder(TextResourceDecoder::create("text/javascript"_s, request.charset()))
{
}
CachedScript::~CachedScript() = default;
RefPtr<TextResourceDecoder> CachedScript::protectedDecoder() const
{
return m_decoder;
}
void CachedScript::setEncoding(const String& chs)
{
protectedDecoder()->setEncoding(chs, TextResourceDecoder::EncodingFromHTTPHeader);
}
ASCIILiteral CachedScript::encoding() const
{
return protectedDecoder()->encoding().name();
}
StringView CachedScript::script(ShouldDecodeAsUTF8Only shouldDecodeAsUTF8Only)
{
if (!m_data)
return emptyString();
if (RefPtr data = m_data; !data->isContiguous())
m_data = data->makeContiguous();
Ref contiguousData = downcast<SharedBuffer>(*m_data);
if (m_decodingState == NeverDecoded
&& PAL::TextEncoding(encoding()).isByteBasedEncoding()
&& contiguousData->size()
&& charactersAreAllASCII(contiguousData->span())) {
m_decodingState = DataAndDecodedStringHaveSameBytes;
// If the encoded and decoded data are the same, there is no decoded data cost!
setDecodedSize(0);
stopDecodedDataDeletionTimer();
m_scriptHash = StringHasher::computeHashAndMaskTop8Bits(contiguousData->span());
}
if (m_decodingState == DataAndDecodedStringHaveSameBytes)
return { contiguousData->span() };
bool shouldForceRedecoding = m_wasForceDecodedAsUTF8 != (shouldDecodeAsUTF8Only == ShouldDecodeAsUTF8Only::Yes);
if (!m_script || shouldForceRedecoding) {
ASSERT(contiguousData->span().size() == encodedSize());
if (shouldDecodeAsUTF8Only == ShouldDecodeAsUTF8Only::Yes) {
Ref forceUTF8Decoder = TextResourceDecoder::create("text/javascript"_s, PAL::UTF8Encoding());
forceUTF8Decoder->setAlwaysUseUTF8();
m_script = forceUTF8Decoder->decodeAndFlush(contiguousData->span());
} else
m_script = protectedDecoder()->decodeAndFlush(contiguousData->span());
if (m_decodingState == NeverDecoded || shouldForceRedecoding)
m_scriptHash = m_script.hash();
ASSERT(!m_scriptHash || m_scriptHash == m_script.hash());
m_decodingState = DataAndDecodedStringHaveDifferentBytes;
m_wasForceDecodedAsUTF8 = shouldDecodeAsUTF8Only == ShouldDecodeAsUTF8Only::Yes;
setDecodedSize(m_script.sizeInBytes());
}
restartDecodedDataDeletionTimer();
return m_script;
}
unsigned CachedScript::scriptHash(ShouldDecodeAsUTF8Only shouldDecodeAsUTF8Only)
{
if (m_decodingState == NeverDecoded || (m_decodingState == DataAndDecodedStringHaveDifferentBytes && m_wasForceDecodedAsUTF8 != (shouldDecodeAsUTF8Only == ShouldDecodeAsUTF8Only::Yes)))
script(shouldDecodeAsUTF8Only);
return m_scriptHash;
}
void CachedScript::finishLoading(const FragmentedSharedBuffer* data, const NetworkLoadMetrics& metrics)
{
if (data) {
m_data = data->makeContiguous();
setEncodedSize(data->size());
} else {
m_data = nullptr;
setEncodedSize(0);
}
CachedResource::finishLoading(data, metrics);
}
void CachedScript::destroyDecodedData()
{
m_script = String();
setDecodedSize(0);
}
void CachedScript::setBodyDataFrom(const CachedResource& resource)
{
ASSERT(resource.type() == type());
auto& script = downcast<const CachedScript>(resource);
CachedResource::setBodyDataFrom(resource);
m_script = script.m_script;
m_scriptHash = script.m_scriptHash;
m_wasForceDecodedAsUTF8 = script.m_wasForceDecodedAsUTF8;
m_decodingState = script.m_decodingState;
m_decoder = script.m_decoder;
}
} // namespace WebCore
|
