136 lines
4.9 KiB
C++
136 lines
4.9 KiB
C++
/*
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* Copyright (C) 2006-2021 Apple Inc. All rights reserved.
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* Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
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* Copyright (C) 2009 Google Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "ContentType.h"
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#include "HTMLParserIdioms.h"
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#include <wtf/JSONValues.h>
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#include <wtf/NeverDestroyed.h>
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namespace WebCore {
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ContentType::ContentType(String&& contentType)
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: m_type(WTFMove(contentType))
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{
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}
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ContentType::ContentType(const String& contentType)
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: m_type(contentType)
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{
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}
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const String& ContentType::codecsParameter()
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{
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static NeverDestroyed<String> codecs { "codecs"_s };
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return codecs;
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}
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const String& ContentType::profilesParameter()
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{
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static NeverDestroyed<String> profiles { "profiles"_s };
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return profiles;
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}
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String ContentType::parameter(const String& parameterName) const
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{
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// A MIME type can have one or more "param=value" after a semicolon, separated from each other by semicolons.
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// FIXME: This will ignore a quotation mark if it comes before the semicolon. Is that the desired behavior?
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auto semicolonPosition = m_type.find(';');
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if (semicolonPosition == notFound)
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return { };
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// FIXME: This matches parameters that have parameterName as a suffix; that is not the desired behavior.
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auto nameStart = m_type.findIgnoringASCIICase(parameterName, semicolonPosition + 1);
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if (nameStart == notFound)
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return { };
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auto equalSignPosition = m_type.find('=', nameStart + parameterName.length());
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if (equalSignPosition == notFound)
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return { };
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// FIXME: This skips over any characters that come before a quotation mark; that is not the desired behavior.
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auto quotePosition = m_type.find('"', equalSignPosition + 1);
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// FIXME: This does not work if there is an escaped quotation mark in the quoted string. Is that the desired behavior?
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auto secondQuotePosition = m_type.find('"', quotePosition + 1);
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size_t start;
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size_t end;
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if (quotePosition != notFound && secondQuotePosition != notFound) {
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start = quotePosition + 1;
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end = secondQuotePosition;
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} else {
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// FIXME: If there is only one quotation mark, this will treat it as part of the string; that is not the desired behavior.
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start = equalSignPosition + 1;
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end = m_type.find(';', start);
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}
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return StringView { m_type }.substring(start, end - start).stripLeadingAndTrailingMatchedCharacters(isHTMLSpace<UChar>).toString();
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}
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String ContentType::containerType() const
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{
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// Strip parameters that come after a semicolon.
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// FIXME: This will ignore a quotation mark if it comes before the semicolon. Is that the desired behavior?
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return stripLeadingAndTrailingHTMLSpaces(m_type.left(m_type.find(';')));
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}
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static inline Vector<String> splitParameters(StringView parametersView)
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{
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Vector<String> result;
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for (auto view : parametersView.split(','))
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result.append(view.stripLeadingAndTrailingMatchedCharacters(isHTMLSpace<UChar>).toString());
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return result;
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}
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Vector<String> ContentType::codecs() const
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{
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return splitParameters(parameter(codecsParameter()));
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}
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Vector<String> ContentType::profiles() const
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{
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return splitParameters(parameter(profilesParameter()));
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}
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String ContentType::toJSONString() const
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{
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auto object = JSON::Object::create();
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object->setString("containerType"_s, containerType());
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auto codecs = codecsParameter();
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if (!codecs.isEmpty())
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object->setString("codecs"_s, codecs);
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auto profiles = profilesParameter();
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if (!profiles.isEmpty())
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object->setString("profiles"_s, profiles);
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return object->toJSONString();
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}
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} // namespace WebCore
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