request-keepalive-quota.html (5172B)
1 <!doctype html> 2 <html> 3 <head> 4 <meta charset="utf-8"> 5 <title>Request Keepalive Quota Tests</title> 6 <meta name="timeout" content="long"> 7 <meta name="help" href="https://fetch.spec.whatwg.org/#request"> 8 <meta name="help" href="https://fetch.spec.whatwg.org/#body-mixin"> 9 <meta name="author" title="Microsoft Edge" href="https://www.microsoft.com"> 10 <meta name="variant" content="?include=fast"> 11 <meta name="variant" content="?include=slow-1"> 12 <meta name="variant" content="?include=slow-2"> 13 <meta name="variant" content="?include=slow-3"> 14 <script src="/resources/testharness.js"></script> 15 <script src="/resources/testharnessreport.js"></script> 16 <script src="/common/subset-tests-by-key.js"></script> 17 </head> 18 <body> 19 <script> 20 'use strict'; 21 22 // We want to ensure that our keepalive requests hang slightly before completing so we can validate 23 // the effects of a rolling quota. To do this we will utilize trickle.py with a 1s delay. This should 24 // prevent any of the Fetch's from finishing in this window. 25 const trickleURL = '../resources/trickle.py?count=1&ms='; 26 const noDelay = 0; 27 const standardDelay = 1000; 28 function wait(ms) { 29 return new Promise(resolve => step_timeout(resolve, ms)); 30 } 31 32 // We should expect 64KiB of rolling quota for any type of keep-alive request sent. 33 const expectedQuota = 65536; 34 35 function fetchKeepAliveRequest(delay, bodySize) { 36 // Create a body of the specified size that's filled with *'s 37 const body = '*'.repeat(bodySize); 38 return fetch(trickleURL + delay, {keepalive: true, body, method: 'POST'}).then(res => { 39 return res.text(); 40 }).then(() => { 41 return wait(1); 42 }); 43 } 44 45 // Test 1 Byte 46 subsetTestByKey("fast", promise_test, function(test) { 47 return fetchKeepAliveRequest(noDelay, 1 /* bodySize */); 48 }, 'A Keep-Alive fetch() with a small body should succeed.'); 49 50 // Test Quota full limit 51 subsetTestByKey("fast", promise_test, function(test) { 52 return fetchKeepAliveRequest(noDelay, expectedQuota /* bodySize */); 53 }, 'A Keep-Alive fetch() with a body at the Quota Limit should succeed.'); 54 55 // Test Quota + 1 Byte 56 subsetTestByKey("fast", promise_test, function(test) { 57 return promise_rejects_js(test, TypeError, fetchKeepAliveRequest(noDelay, expectedQuota + 1)); 58 }, 'A Keep-Alive fetch() with a body over the Quota Limit should reject.'); 59 60 // Test the Quota becomes available upon promise completion. 61 subsetTestByKey("slow-1", promise_test, function (test) { 62 // Fill our Quota then try to send a second fetch. 63 return fetchKeepAliveRequest(standardDelay, expectedQuota).then(() => { 64 // Now validate that we can send another Keep-Alive fetch for the full size of the quota. 65 return fetchKeepAliveRequest(noDelay, expectedQuota); 66 }); 67 }, 'A Keep-Alive fetch() should return its allocated Quota upon promise resolution.'); 68 69 // Ensure only the correct amount of Quota becomes available when a fetch completes. 70 subsetTestByKey("slow-2", promise_test, function(test) { 71 // Create a fetch that uses all but 1 Byte of the Quota and runs for 2x as long as the other requests. 72 const first = fetchKeepAliveRequest(standardDelay * 2, expectedQuota - 1); 73 74 // Now create a single Byte request that will complete quicker. 75 const second = fetchKeepAliveRequest(standardDelay, 1 /* bodySize */).then(() => { 76 // We shouldn't be able to create a 2 Byte request right now as only 1 Byte should have freed up. 77 return promise_rejects_js(test, TypeError, fetchKeepAliveRequest(noDelay, 2 /* bodySize */)); 78 }).then(() => { 79 // Now validate that we can send another Keep-Alive fetch for just 1 Byte. 80 return fetchKeepAliveRequest(noDelay, 1 /* bodySize */); 81 }); 82 83 return Promise.all([first, second]); 84 }, 'A Keep-Alive fetch() should return only its allocated Quota upon promise resolution.'); 85 86 // Test rejecting a fetch() after the quota is used up. 87 subsetTestByKey("slow-3", promise_test, function (test) { 88 // Fill our Quota then try to send a second fetch. 89 const p = fetchKeepAliveRequest(standardDelay, expectedQuota); 90 91 const q = promise_rejects_js(test, TypeError, fetchKeepAliveRequest(noDelay, 1 /* bodySize */)); 92 return Promise.all([p, q]); 93 }, 'A Keep-Alive fetch() should not be allowed if the Quota is used up.'); 94 95 </script> 96 </body> 97 </html>