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ContentType.cpp
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135 lines (114 loc) · 4.88 KB
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/*
* Copyright (C) 2006-2021 Apple Inc. All rights reserved.
* Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
* Copyright (C) 2009 Google Inc. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 INC. OR
* 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 "ContentType.h"
#include "HTMLParserIdioms.h"
#include <wtf/JSONValues.h>
#include <wtf/NeverDestroyed.h>
namespace WebCore {
ContentType::ContentType(String&& contentType)
: m_type(WTFMove(contentType))
{
}
ContentType::ContentType(const String& contentType)
: m_type(contentType)
{
}
const String& ContentType::codecsParameter()
{
static NeverDestroyed<String> codecs { "codecs"_s };
return codecs;
}
const String& ContentType::profilesParameter()
{
static NeverDestroyed<String> profiles { "profiles"_s };
return profiles;
}
String ContentType::parameter(const String& parameterName) const
{
// A MIME type can have one or more "param=value" after a semicolon, separated from each other by semicolons.
// FIXME: This will ignore a quotation mark if it comes before the semicolon. Is that the desired behavior?
auto semicolonPosition = m_type.find(';');
if (semicolonPosition == notFound)
return { };
// FIXME: This matches parameters that have parameterName as a suffix; that is not the desired behavior.
auto nameStart = m_type.findIgnoringASCIICase(parameterName, semicolonPosition + 1);
if (nameStart == notFound)
return { };
auto equalSignPosition = m_type.find('=', nameStart + parameterName.length());
if (equalSignPosition == notFound)
return { };
// FIXME: This skips over any characters that come before a quotation mark; that is not the desired behavior.
auto quotePosition = m_type.find('"', equalSignPosition + 1);
// FIXME: This does not work if there is an escaped quotation mark in the quoted string. Is that the desired behavior?
auto secondQuotePosition = m_type.find('"', quotePosition + 1);
size_t start;
size_t end;
if (quotePosition != notFound && secondQuotePosition != notFound) {
start = quotePosition + 1;
end = secondQuotePosition;
} else {
// FIXME: If there is only one quotation mark, this will treat it as part of the string; that is not the desired behavior.
start = equalSignPosition + 1;
end = m_type.find(';', start);
}
return StringView { m_type }.substring(start, end - start).stripLeadingAndTrailingMatchedCharacters(isHTMLSpace<UChar>).toString();
}
String ContentType::containerType() const
{
// Strip parameters that come after a semicolon.
// FIXME: This will ignore a quotation mark if it comes before the semicolon. Is that the desired behavior?
return stripLeadingAndTrailingHTMLSpaces(m_type.left(m_type.find(';')));
}
static inline Vector<String> splitParameters(StringView parametersView)
{
Vector<String> result;
for (auto view : parametersView.split(','))
result.append(view.stripLeadingAndTrailingMatchedCharacters(isHTMLSpace<UChar>).toString());
return result;
}
Vector<String> ContentType::codecs() const
{
return splitParameters(parameter(codecsParameter()));
}
Vector<String> ContentType::profiles() const
{
return splitParameters(parameter(profilesParameter()));
}
String ContentType::toJSONString() const
{
auto object = JSON::Object::create();
object->setString("containerType"_s, containerType());
auto codecs = codecsParameter();
if (!codecs.isEmpty())
object->setString("codecs"_s, codecs);
auto profiles = profilesParameter();
if (!profiles.isEmpty())
object->setString("profiles"_s, profiles);
return object->toJSONString();
}
} // namespace WebCore