pdfjs-dist/lib/test/unit/network_spec.js

/* 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';
var coreNetwork = require('../../core/network.js');
var PDFNetworkStream = coreNetwork.PDFNetworkStream;
describe('network', function () {
 var pdf1 = new URL('../pdfs/tracemonkey.pdf', window.location).href;
 var pdf1Length = 1016315;
 var pdf2 = new URL('../pdfs/pdf.pdf', window.location).href;
 var pdf2Length = 32472771;
 it('read without stream and range', function (done) {
  var stream = new PDFNetworkStream({
   source: {
    url: pdf1,
    rangeChunkSize: 65536,
    disableStream: true
   },
   disableRange: true
  });
  var fullReader = stream.getFullReader();
  var isStreamingSupported, isRangeSupported;
  var promise = fullReader.headersReady.then(function () {
   isStreamingSupported = fullReader.isStreamingSupported;
   isRangeSupported = fullReader.isRangeSupported;
  });
  var len = 0, count = 0;
  var read = function () {
   return fullReader.read().then(function (result) {
    if (result.done) {
     return;
    }
    count++;
    len += result.value.byteLength;
    return read();
   });
  };
  var readPromise = Promise.all([
   read(),
   promise
  ]);
  readPromise.then(function (page) {
   expect(len).toEqual(pdf1Length);
   expect(count).toEqual(1);
   expect(isStreamingSupported).toEqual(false);
   expect(isRangeSupported).toEqual(false);
   done();
  }).catch(function (reason) {
   done.fail(reason);
  });
 });
 it('read with streaming', function (done) {
  var userAgent = window.navigator.userAgent;
  var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(userAgent);
  if (!m || m[1] < 9) {
   expect(true).toEqual(true);
   done();
   return;
  }
  var stream = new PDFNetworkStream({
   source: {
    url: pdf2,
    rangeChunkSize: 65536,
    disableStream: false
   },
   disableRange: false
  });
  var fullReader = stream.getFullReader();
  var isStreamingSupported, isRangeSupported;
  var promise = fullReader.headersReady.then(function () {
   isStreamingSupported = fullReader.isStreamingSupported;
   isRangeSupported = fullReader.isRangeSupported;
  });
  var len = 0, count = 0;
  var read = function () {
   return fullReader.read().then(function (result) {
    if (result.done) {
     return;
    }
    count++;
    len += result.value.byteLength;
    return read();
   });
  };
  var readPromise = Promise.all([
   read(),
   promise
  ]);
  readPromise.then(function () {
   expect(len).toEqual(pdf2Length);
   expect(count).toBeGreaterThan(1);
   expect(isStreamingSupported).toEqual(true);
   expect(isRangeSupported).toEqual(true);
   done();
  }).catch(function (reason) {
   done.fail(reason);
  });
 });
 it('read custom ranges', function (done) {
  var rangeSize = 32768;
  var stream = new PDFNetworkStream({
   source: {
    url: pdf1,
    length: pdf1Length,
    rangeChunkSize: rangeSize,
    disableStream: true
   },
   disableRange: false
  });
  var fullReader = stream.getFullReader();
  var isStreamingSupported, isRangeSupported, fullReaderCancelled;
  var promise = fullReader.headersReady.then(function () {
   isStreamingSupported = fullReader.isStreamingSupported;
   isRangeSupported = fullReader.isRangeSupported;
   fullReader.cancel('Don\'t need full reader');
   fullReaderCancelled = true;
  });
  var tailSize = pdf1Length % rangeSize || rangeSize;
  var range1Reader = stream.getRangeReader(pdf1Length - tailSize - rangeSize, pdf1Length - tailSize);
  var range2Reader = stream.getRangeReader(pdf1Length - tailSize, pdf1Length);
  var result1 = { value: 0 }, result2 = { value: 0 };
  var read = function (reader, lenResult) {
   return reader.read().then(function (result) {
    if (result.done) {
     return;
    }
    lenResult.value += result.value.byteLength;
    return read(reader, lenResult);
   });
  };
  var readPromises = Promise.all([
   read(range1Reader, result1),
   read(range2Reader, result2),
   promise
  ]);
  readPromises.then(function () {
   expect(result1.value).toEqual(rangeSize);
   expect(result2.value).toEqual(tailSize);
   expect(isStreamingSupported).toEqual(false);
   expect(isRangeSupported).toEqual(true);
   expect(fullReaderCancelled).toEqual(true);
   done();
  }).catch(function (reason) {
   done.fail(reason);
  });
 });
});