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/*
* Copyright (C) 2021 Apple 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 "ParsedRequestRange.h"
#include <wtf/text/StringToIntegerConversion.h>
namespace WebCore {
std::optional<ParsedRequestRange> ParsedRequestRange::parse(StringView input)
{
// https://tools.ietf.org/html/rfc7233#section-2.1 but assuming there will always be a begin and an end or parsing will fail
if (!input.startsWith("bytes="_s))
return std::nullopt;
size_t begin { 0 };
size_t end { 0 };
size_t rangeBeginPosition = 6;
size_t dashPosition = input.find('-', rangeBeginPosition);
if (dashPosition == notFound)
return std::nullopt;
auto beginString = input.substring(rangeBeginPosition, dashPosition - rangeBeginPosition);
auto optionalBegin = parseInteger<uint64_t>(beginString);
if (!optionalBegin)
return std::nullopt;
begin = *optionalBegin;
auto endString = input.substring(dashPosition + 1);
auto optionalEnd = parseInteger<uint64_t>(endString);
if (!optionalEnd)
return std::nullopt;
end = *optionalEnd;
if (begin > end)
return std::nullopt;
return {{ begin, end }};
}
}