netwerk/test/unit/test_rcwn_always_cache_new_content.js

   1 /* Any copyright is dedicated to the Public Domain.
   2  * http://creativecommons.org/publicdomain/zero/1.0/
   3  */
   4
   5 "use strict";
   6
   7 const { HttpServer } = ChromeUtils.importESModule(
   8   "resource://testing-common/httpd.sys.mjs"
   9 );
  10
  11 var httpserver = new HttpServer();
  12 httpserver.start(-1);
  13 const PORT = httpserver.identity.primaryPort;
  14
  15 function make_channel(url) {
  16   return NetUtil.newChannel({
  17     uri: url,
  18     loadUsingSystemPrincipal: true,
  19   }).QueryInterface(Ci.nsIHttpChannel);
  20 }
  21
  22 let gFirstResponseBody = "first version";
  23 let gSecondResponseBody = "second version";
  24 let gRequestCounter = 0;
  25
  26 function test_handler(metadata, response) {
  27   response.setHeader("Content-Type", "text/plain");
  28   response.setHeader("Cache-Control", "max-age=3600");
  29   response.setHeader("ETag", "test-etag1");
  30
  31   switch (gRequestCounter) {
  32     case 0:
  33       response.bodyOutputStream.write(
  34         gFirstResponseBody,
  35         gFirstResponseBody.length
  36       );
  37       break;
  38     case 1:
  39       response.bodyOutputStream.write(
  40         gSecondResponseBody,
  41         gSecondResponseBody.length
  42       );
  43       break;
  44     default:
  45       do_throw("Unexpected request");
  46   }
  47   response.setStatusLine(metadata.httpVersion, 200, "OK");
  48 }
  49
  50 function checkContent(request, buffer, context, isFromCache) {
  51   let isRacing = request.QueryInterface(Ci.nsICacheInfoChannel).isRacing();
  52   switch (gRequestCounter) {
  53     case 0:
  54       Assert.equal(buffer, gFirstResponseBody);
  55       Assert.ok(!isFromCache);
  56       Assert.ok(!isRacing);
  57       break;
  58     case 1:
  59       Assert.equal(buffer, gSecondResponseBody);
  60       Assert.ok(!isFromCache);
  61       Assert.ok(isRacing);
  62       break;
  63     case 2:
  64       Assert.equal(buffer, gSecondResponseBody);
  65       Assert.ok(isFromCache);
  66       Assert.ok(!isRacing);
  67       break;
  68     default:
  69       do_throw("Unexpected request");
  70   }
  71
  72   gRequestCounter++;
  73   executeSoon(() => {
  74     testGenerator.next();
  75   });
  76 }
  77
  78 function run_test() {
  79   do_get_profile();
  80   // In this test, we race the requests manually using |TriggerNetwork|,
  81   // therefore we should disable racing in the HttpChannel first.
  82   Services.prefs.setBoolPref("network.http.rcwn.enabled", false);
  83   httpserver.registerPathHandler("/rcwn", test_handler);
  84   testGenerator.next();
  85   do_test_pending();
  86 }
  87
  88 let testGenerator = testSteps();
  89 function* testSteps() {
  90   // Store first version of the content in the cache.
  91   let channel = make_channel("http://localhost:" + PORT + "/rcwn");
  92   channel.asyncOpen(new ChannelListener(checkContent, null));
  93   yield undefined;
  94   equal(gRequestCounter, 1);
  95
  96   // Simulate the network victory by setting high delay for the cache fetch and
  97   // triggering the network.
  98   channel = make_channel("http://localhost:" + PORT + "/rcwn");
  99   channel
 100     .QueryInterface(Ci.nsIRaceCacheWithNetwork)
 101     .test_delayCacheEntryOpeningBy(100000);
 102   // Trigger network after 50 ms.
 103   channel.QueryInterface(Ci.nsIRaceCacheWithNetwork).test_triggerNetwork(50);
 104   channel.asyncOpen(new ChannelListener(checkContent, null));
 105   yield undefined;
 106   equal(gRequestCounter, 2);
 107
 108   // Simulate navigation back by specifying VALIDATE_NEVER flag.
 109   channel = make_channel("http://localhost:" + PORT + "/rcwn");
 110   channel.loadFlags = Ci.nsIRequest.VALIDATE_NEVER;
 111   channel.asyncOpen(new ChannelListener(checkContent, null));
 112   yield undefined;
 113   equal(gRequestCounter, 3);
 114
 115   httpserver.stop(do_test_finished);
 116 }