67 lines
2.3 KiB
67 lines
2.3 KiB
/* Copyright 2017 Mozilla Foundation |
|
* |
|
* Licensed under the Apache License, Version 2.0 (the "License"); |
|
* you may not use this file except in compliance with the License. |
|
* You may obtain a copy of the License at |
|
* |
|
* http://www.apache.org/licenses/LICENSE-2.0 |
|
* |
|
* Unless required by applicable law or agreed to in writing, software |
|
* distributed under the License is distributed on an "AS IS" BASIS, |
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
|
* See the License for the specific language governing permissions and |
|
* limitations under the License. |
|
*/ |
|
'use strict'; |
|
|
|
Object.defineProperty(exports, "__esModule", { |
|
value: true |
|
}); |
|
exports.validateResponseStatus = exports.validateRangeRequestCapabilities = exports.createResponseStatusError = undefined; |
|
|
|
var _util = require('../shared/util'); |
|
|
|
function validateRangeRequestCapabilities(_ref) { |
|
var getResponseHeader = _ref.getResponseHeader, |
|
isHttp = _ref.isHttp, |
|
rangeChunkSize = _ref.rangeChunkSize, |
|
disableRange = _ref.disableRange; |
|
|
|
(0, _util.assert)(rangeChunkSize > 0); |
|
var returnValues = { |
|
allowRangeRequests: false, |
|
suggestedLength: undefined |
|
}; |
|
if (disableRange || !isHttp) { |
|
return returnValues; |
|
} |
|
if (getResponseHeader('Accept-Ranges') !== 'bytes') { |
|
return returnValues; |
|
} |
|
var contentEncoding = getResponseHeader('Content-Encoding') || 'identity'; |
|
if (contentEncoding !== 'identity') { |
|
return returnValues; |
|
} |
|
var length = parseInt(getResponseHeader('Content-Length'), 10); |
|
if (!Number.isInteger(length)) { |
|
return returnValues; |
|
} |
|
returnValues.suggestedLength = length; |
|
if (length <= 2 * rangeChunkSize) { |
|
return returnValues; |
|
} |
|
returnValues.allowRangeRequests = true; |
|
return returnValues; |
|
} |
|
function createResponseStatusError(status, url) { |
|
if (status === 404 || status === 0 && /^file:/.test(url)) { |
|
return new _util.MissingPDFException('Missing PDF "' + url + '".'); |
|
} |
|
return new _util.UnexpectedResponseException('Unexpected server response (' + status + ') while retrieving PDF "' + url + '".', status); |
|
} |
|
function validateResponseStatus(status) { |
|
return status === 200 || status === 206; |
|
} |
|
exports.createResponseStatusError = createResponseStatusError; |
|
exports.validateRangeRequestCapabilities = validateRangeRequestCapabilities; |
|
exports.validateResponseStatus = validateResponseStatus; |