test/parallel/test-zlib-dictionary.js

   1 // test compression/decompression with dictionary
   2
   3 var common = require('../common');
   4 var assert = require('assert');
   5 var zlib = require('zlib');
   6 var path = require('path');
   7
   8 var spdyDict = new Buffer([
   9   'optionsgetheadpostputdeletetraceacceptaccept-charsetaccept-encodingaccept-',
  10   'languageauthorizationexpectfromhostif-modified-sinceif-matchif-none-matchi',
  11   'f-rangeif-unmodifiedsincemax-forwardsproxy-authorizationrangerefererteuser',
  12   '-agent10010120020120220320420520630030130230330430530630740040140240340440',
  13   '5406407408409410411412413414415416417500501502503504505accept-rangesageeta',
  14   'glocationproxy-authenticatepublicretry-afterservervarywarningwww-authentic',
  15   'ateallowcontent-basecontent-encodingcache-controlconnectiondatetrailertran',
  16   'sfer-encodingupgradeviawarningcontent-languagecontent-lengthcontent-locati',
  17   'oncontent-md5content-rangecontent-typeetagexpireslast-modifiedset-cookieMo',
  18   'ndayTuesdayWednesdayThursdayFridaySaturdaySundayJanFebMarAprMayJunJulAugSe',
  19   'pOctNovDecchunkedtext/htmlimage/pngimage/jpgimage/gifapplication/xmlapplic',
  20   'ation/xhtmltext/plainpublicmax-agecharset=iso-8859-1utf-8gzipdeflateHTTP/1',
  21   '.1statusversionurl\0'
  22 ].join(''));
  23
  24 var deflate = zlib.createDeflate({ dictionary: spdyDict });
  25
  26 var input = [
  27   'HTTP/1.1 200 Ok',
  28   'Server: node.js',
  29   'Content-Length: 0',
  30   ''
  31 ].join('\r\n');
  32
  33 var called = 0;
  34
  35 //
  36 // We'll use clean-new inflate stream each time
  37 // and .reset() old dirty deflate one
  38 //
  39 function run(num) {
  40   var inflate = zlib.createInflate({ dictionary: spdyDict });
  41
  42   if (num === 2) {
  43     deflate.reset();
  44     deflate.removeAllListeners('data');
  45   }
  46
  47   // Put data into deflate stream
  48   deflate.on('data', function(chunk) {
  49     inflate.write(chunk);
  50   });
  51
  52   // Get data from inflate stream
  53   var output = [];
  54   inflate.on('data', function(chunk) {
  55     output.push(chunk);
  56   });
  57   inflate.on('end', function() {
  58     called++;
  59
  60     assert.equal(output.join(''), input);
  61
  62     if (num < 2) run(num + 1);
  63   });
  64
  65   deflate.write(input);
  66   deflate.flush(function() {
  67     inflate.end();
  68   });
  69 }
  70 run(1);
  71
  72 process.on('exit', function() {
  73   assert.equal(called, 2);
  74 });