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57 lines
1.8 KiB
57 lines
1.8 KiB
8 years ago
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/* Copyright 2017 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.validateRangeRequestCapabilities = undefined;
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var _util = require('../shared/util');
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function validateRangeRequestCapabilities(_ref) {
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var getResponseHeader = _ref.getResponseHeader,
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isHttp = _ref.isHttp,
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rangeChunkSize = _ref.rangeChunkSize,
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disableRange = _ref.disableRange;
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(0, _util.assert)(rangeChunkSize > 0);
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var returnValues = {
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allowRangeRequests: false,
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suggestedLength: undefined
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};
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if (disableRange || !isHttp) {
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return returnValues;
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}
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if (getResponseHeader('Accept-Ranges') !== 'bytes') {
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return returnValues;
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}
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var contentEncoding = getResponseHeader('Content-Encoding') || 'identity';
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if (contentEncoding !== 'identity') {
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return returnValues;
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}
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var length = getResponseHeader('Content-Length');
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length = parseInt(length, 10);
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if (!(0, _util.isInt)(length)) {
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return returnValues;
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}
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returnValues.suggestedLength = length;
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if (length <= 2 * rangeChunkSize) {
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return returnValues;
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}
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returnValues.allowRangeRequests = true;
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return returnValues;
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}
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exports.validateRangeRequestCapabilities = validateRangeRequestCapabilities;
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