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/*
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, 2005, 2006, 2007, 2008 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 "RuntimeApplicationChecks.h"
#include "SharedBuffer.h"
#include "TextResourceDecoder.h"
namespace WebCore {
CachedScript::CachedScript(CachedResourceRequest&& request, PAL::SessionID sessionID, const CookieJar* cookieJar)
: CachedResource(WTFMove(request), Type::Script, sessionID, cookieJar)
, m_decoder(TextResourceDecoder::create("text/javascript"_s, request.charset()))
{
}
CachedScript::~CachedScript() = default;
void CachedScript::setEncoding(const String& chs)
{
m_decoder->setEncoding(chs, TextResourceDecoder::EncodingFromHTTPHeader);
}
String CachedScript::encoding() const
{
return String::fromLatin1(m_decoder->encoding().name());
}
StringView CachedScript::script(ShouldDecodeAsUTF8Only shouldDecodeAsUTF8Only)
{
if (!m_data)
return emptyString();
if (!m_data->isContiguous())
m_data = m_data->makeContiguous();
auto& contiguousData = downcast<SharedBuffer>(*m_data);
if (m_decodingState == NeverDecoded
&& PAL::TextEncoding(encoding()).isByteBasedEncoding()
&& m_data->size()
&& charactersAreAllASCII(contiguousData.data(), m_data->size())) {
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.data(), m_data->size());
}
if (m_decodingState == DataAndDecodedStringHaveSameBytes)
return { contiguousData.data(), static_cast<unsigned>(m_data->size()) };
bool shouldForceRedecoding = m_wasForceDecodedAsUTF8 != (shouldDecodeAsUTF8Only == ShouldDecodeAsUTF8Only::Yes);
if (!m_script || shouldForceRedecoding) {
if (shouldDecodeAsUTF8Only == ShouldDecodeAsUTF8Only::Yes) {
auto forceUTF8Decoder = TextResourceDecoder::create("text/javascript"_s, PAL::UTF8Encoding());
forceUTF8Decoder->setAlwaysUseUTF8();
m_script = forceUTF8Decoder->decodeAndFlush(contiguousData.data(), encodedSize());
} else
m_script = m_decoder->decodeAndFlush(contiguousData.data(), encodedSize());
if (m_decodingState == NeverDecoded || shouldForceRedecoding)
m_scriptHash = m_script.impl()->hash();
ASSERT(!m_scriptHash || m_scriptHash == m_script.impl()->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 = static_cast<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;
}
bool CachedScript::shouldIgnoreHTTPStatusCodeErrors() const
{
#if PLATFORM(MAC)
// This is a workaround for <rdar://problem/13916291>
// REGRESSION (r119759): Adobe Flash Player "smaller" installer relies on the incorrect firing
// of a load event and needs an app-specific hack for compatibility.
// The installer in question tries to load .js file that doesn't exist, causing the server to
// return a 404 response. Normally, this would trigger an error event to be dispatched, but the
// installer expects a load event instead so we work around it here.
if (MacApplication::isSolidStateNetworksDownloader())
return true;
#endif
return CachedResource::shouldIgnoreHTTPStatusCodeErrors();
}
} // namespace WebCore
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