forked from mirrors/gecko-dev
64 lines
2.3 KiB
C++
64 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ContentRange.h"
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#include "nsContentUtils.h"
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mozilla::net::ContentRange::ContentRange(const nsACString& aRangeHeader,
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uint64_t aSize)
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: mStart(0), mEnd(0), mSize(0) {
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auto parsed = nsContentUtils::ParseSingleRangeRequest(aRangeHeader, true);
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// https://fetch.spec.whatwg.org/#ref-for-simple-range-header-value%E2%91%A1
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// If rangeValue is failure, then return a network error.
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if (!parsed) {
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return;
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}
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// Sanity check: ParseSingleRangeRequest should handle these two cases.
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// If rangeEndValue and rangeStartValue are null, then return failure.
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MOZ_ASSERT(parsed->Start().isSome() || parsed->End().isSome());
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// If rangeStartValue and rangeEndValue are numbers, and rangeStartValue
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// is greater than rangeEndValue, then return failure.
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MOZ_ASSERT(parsed->Start().isNothing() || parsed->End().isNothing() ||
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*parsed->Start() <= *parsed->End());
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// https://fetch.spec.whatwg.org/#ref-for-simple-range-header-value%E2%91%A1
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// If rangeStart is null:
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if (parsed->Start().isNothing()) {
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// Set rangeStart to fullLength − rangeEnd.
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mStart = aSize - *parsed->End();
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// Set rangeEnd to rangeStart + rangeEnd − 1.
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mEnd = mStart + *parsed->End() - 1;
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// Otherwise:
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} else {
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// If rangeStart is greater than or equal to fullLength, then return a
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// network error.
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if (*parsed->Start() >= aSize) {
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return;
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}
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mStart = *parsed->Start();
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// If rangeEnd is null or rangeEnd is greater than or equal to fullLength,
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// then set rangeEnd to fullLength − 1.
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if (parsed->End().isNothing() || *parsed->End() >= aSize) {
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mEnd = aSize - 1;
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} else {
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mEnd = *parsed->End();
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}
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}
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mSize = aSize;
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}
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void mozilla::net::ContentRange::AsHeader(nsACString& aOutString) const {
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aOutString.Assign("bytes "_ns);
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aOutString.AppendInt(mStart);
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aOutString.AppendLiteral("-");
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aOutString.AppendInt(mEnd);
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aOutString.AppendLiteral("/");
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aOutString.AppendInt(mSize);
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}
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