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/*
* Copyright (C) 2010. Adam Barth. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "DocumentWriter.h"
#include "DOMImplementation.h"
#include "DOMWindow.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameLoaderClient.h"
#include "FrameLoaderStateMachine.h"
#include "FrameView.h"
#include "PlaceholderDocument.h"
#include "PluginDocument.h"
#include "RawDataDocumentParser.h"
#include "ScriptableDocumentParser.h"
#include "SecurityOrigin.h"
#include "SegmentedString.h"
#include "Settings.h"
#include "SinkDocument.h"
#include "TextResourceDecoder.h"
namespace WebCore {
static inline bool canReferToParentFrameEncoding(const Frame* frame, const Frame* parentFrame)
{
return parentFrame && parentFrame->document()->securityOrigin()->canAccess(frame->document()->securityOrigin());
}
DocumentWriter::DocumentWriter(Frame* frame)
: m_frame(frame)
, m_receivedData(false)
, m_encodingWasChosenByUser(false)
{
}
// This is only called by ScriptController::executeIfJavaScriptURL
// and always contains the result of evaluating a javascript: url.
// This is the <iframe src="javascript:'html'"> case.
void DocumentWriter::replaceDocument(const String& source)
{
m_frame->loader()->stopAllLoaders();
begin(m_frame->document()->url(), true, m_frame->document()->securityOrigin());
if (!source.isNull()) {
if (!m_receivedData) {
m_receivedData = true;
m_frame->document()->setCompatibilityMode(Document::NoQuirksMode);
}
// FIXME: This should call DocumentParser::appendBytes instead of append
// to support RawDataDocumentParsers.
if (DocumentParser* parser = m_frame->document()->parser())
parser->append(source);
}
end();
}
void DocumentWriter::clear()
{
m_decoder = 0;
m_receivedData = false;
if (!m_encodingWasChosenByUser)
m_encoding = String();
}
void DocumentWriter::begin()
{
begin(KURL());
}
PassRefPtr<Document> DocumentWriter::createDocument(const KURL& url)
{
if (!m_frame->loader()->stateMachine()->isDisplayingInitialEmptyDocument() && m_frame->loader()->client()->shouldUsePluginDocument(m_mimeType))
return PluginDocument::create(m_frame, url);
if (!m_frame->loader()->client()->hasHTMLView())
return PlaceholderDocument::create(m_frame, url);
return DOMImplementation::createDocument(m_mimeType, m_frame, url, m_frame->inViewSourceMode());
}
void DocumentWriter::begin(const KURL& url, bool dispatch, SecurityOrigin* origin)
{
// We need to take a reference to the security origin because |clear|
// might destroy the document that owns it.
RefPtr<SecurityOrigin> forcedSecurityOrigin = origin;
// Create a new document before clearing the frame, because it may need to
// inherit an aliased security context.
RefPtr<Document> document = createDocument(url);
// If the new document is for a Plugin but we're supposed to be sandboxed from Plugins,
// then replace the document with one whose parser will ignore the incoming data (bug 39323)
if (document->isPluginDocument() && m_frame->loader()->isSandboxed(SandboxPlugins))
document = SinkDocument::create(m_frame, url);
bool resetScripting = !(m_frame->loader()->stateMachine()->isDisplayingInitialEmptyDocument() && m_frame->document()->securityOrigin()->isSecureTransitionTo(url));
m_frame->loader()->clear(resetScripting, resetScripting);
clear();
if (resetScripting)
m_frame->script()->updatePlatformScriptObjects();
m_frame->loader()->setOutgoingReferrer(url);
m_frame->setDocument(document);
if (m_decoder)
document->setDecoder(m_decoder.get());
if (forcedSecurityOrigin)
document->setSecurityOrigin(forcedSecurityOrigin.get());
m_frame->domWindow()->setURL(document->url());
m_frame->domWindow()->setSecurityOrigin(document->securityOrigin());
m_frame->loader()->didBeginDocument(dispatch);
document->implicitOpen();
if (m_frame->view() && m_frame->loader()->client()->hasHTMLView())
m_frame->view()->setContentsSize(IntSize());
}
TextResourceDecoder* DocumentWriter::createDecoderIfNeeded()
{
if (!m_decoder) {
if (Settings* settings = m_frame->settings()) {
m_decoder = TextResourceDecoder::create(m_mimeType,
settings->defaultTextEncodingName(),
settings->usesEncodingDetector());
Frame* parentFrame = m_frame->tree()->parent();
// Set the hint encoding to the parent frame encoding only if
// the parent and the current frames share the security origin.
// We impose this condition because somebody can make a child frame
// containing a carefully crafted html/javascript in one encoding
// that can be mistaken for hintEncoding (or related encoding) by
// an auto detector. When interpreted in the latter, it could be
// an attack vector.
// FIXME: This might be too cautious for non-7bit-encodings and
// we may consider relaxing this later after testing.
if (canReferToParentFrameEncoding(m_frame, parentFrame))
m_decoder->setHintEncoding(parentFrame->document()->decoder());
} else
m_decoder = TextResourceDecoder::create(m_mimeType, String());
Frame* parentFrame = m_frame->tree()->parent();
if (m_encoding.isEmpty()) {
if (canReferToParentFrameEncoding(m_frame, parentFrame))
m_decoder->setEncoding(parentFrame->document()->inputEncoding(), TextResourceDecoder::EncodingFromParentFrame);
} else {
m_decoder->setEncoding(m_encoding,
m_encodingWasChosenByUser ? TextResourceDecoder::UserChosenEncoding : TextResourceDecoder::EncodingFromHTTPHeader);
}
m_frame->document()->setDecoder(m_decoder.get());
}
return m_decoder.get();
}
void DocumentWriter::reportDataReceived()
{
ASSERT(m_decoder);
if (!m_receivedData) {
m_receivedData = true;
if (m_decoder->encoding().usesVisualOrdering())
m_frame->document()->setVisuallyOrdered();
m_frame->document()->recalcStyle(Node::Force);
}
}
void DocumentWriter::addData(const char* str, int len, bool flush)
{
if (len == -1)
len = strlen(str);
DocumentParser* parser = m_frame->document()->parser();
if (parser)
parser->appendBytes(this, str, len, flush);
}
void DocumentWriter::end()
{
m_frame->loader()->didEndDocument();
endIfNotLoadingMainResource();
}
void DocumentWriter::endIfNotLoadingMainResource()
{
if (m_frame->loader()->isLoadingMainResource() || !m_frame->page() || !m_frame->document())
return;
// http://bugs.webkit.org/show_bug.cgi?id=10854
// The frame's last ref may be removed and it can be deleted by checkCompleted(),
// so we'll add a protective refcount
RefPtr<Frame> protector(m_frame);
// make sure nothing's left in there
addData(0, 0, true);
m_frame->document()->finishParsing();
}
String DocumentWriter::encoding() const
{
if (m_encodingWasChosenByUser && !m_encoding.isEmpty())
return m_encoding;
if (m_decoder && m_decoder->encoding().isValid())
return m_decoder->encoding().name();
Settings* settings = m_frame->settings();
return settings ? settings->defaultTextEncodingName() : String();
}
void DocumentWriter::setEncoding(const String& name, bool userChosen)
{
m_frame->loader()->willSetEncoding();
m_encoding = name;
m_encodingWasChosenByUser = userChosen;
}
void DocumentWriter::setDecoder(TextResourceDecoder* decoder)
{
m_decoder = decoder;
}
String DocumentWriter::deprecatedFrameEncoding() const
{
return m_frame->document()->url().isEmpty() ? m_encoding : encoding();
}
void DocumentWriter::setDocumentWasLoadedAsPartOfNavigation()
{
m_frame->document()->parser()->setDocumentWasLoadedAsPartOfNavigation();
}
} // namespace WebCore
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