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node_modules/stream-http/test/browser/binary-streaming.js 1.98 KB
aaac7fed   liuqimichale   add
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  var Buffer = require('buffer').Buffer
  var fs = require('fs')
  var test = require('tape')
  var UAParser = require('ua-parser-js')
  
  var http = require('../..')
  
  var browser = (new UAParser()).setUA(navigator.userAgent).getBrowser()
  var browserName = browser.name
  var browserVersion = browser.major
  // Binary streaming doesn't work in IE10 or below
  var skipStreamingCheck = (browserName === 'IE' && browserVersion <= 10)
  
  // Binary data gets corrupted in IE8 or below
  var skipVerification = (browserName === 'IE' && browserVersion <= 8)
  
  // IE8 tends to throw up modal dialogs complaining about scripts running too long
  // Since streaming doesn't actually work there anyway, just use one copy
  var COPIES = skipVerification ? 1 : 20
  var MIN_PIECES = 2
  
  var referenceOnce = fs.readFileSync(__dirname + '/../server/static/browserify.png')
  var reference = new Buffer(referenceOnce.length * COPIES)
  for(var i = 0; i < COPIES; i++) {
  	referenceOnce.copy(reference, referenceOnce.length * i)
  }
  
  test('binary streaming', function (t) {
  	http.get({
  		path: '/browserify.png?copies=' + COPIES,
  		mode: 'allow-wrong-content-type'
  	}, function (res) {
  		var buffers = []
  		res.on('end', function () {
  			if (skipVerification)
  				t.skip('binary data not preserved on IE <= 8')
  			else
  				t.ok(reference.equals(Buffer.concat(buffers)), 'contents match')
  
  			if (skipStreamingCheck)
  				t.skip('streaming not available on IE <= 8')
  			else
  				t.ok(buffers.length >= MIN_PIECES, 'received in multiple parts')
  			t.end()
  		})
  
  		res.on('data', function (data) {
  			buffers.push(data)
  		})
  	})
  })
  
  test('large binary request without streaming', function (t) {
  	http.get({
  		path: '/browserify.png?copies=' + COPIES,
  		mode: 'default',
  	}, function (res) {
  		var buffers = []
  		res.on('end', function () {
  			if (skipVerification)
  				t.skip('binary data not preserved on IE <= 8')
  			else
  				t.ok(reference.equals(Buffer.concat(buffers)), 'contents match')
  			t.end()
  		})
  
  		res.on('data', function (data) {
  			buffers.push(data)
  		})
  	})
  })