bypass-cache-revalidation.html (1128B)
1 <!DOCTYPE html> 2 <title>Cached images can bypass revalidation</title> 3 <script src="/resources/testharness.js"></script> 4 <script src="/resources/testharnessreport.js"></script> 5 <script src="/common/utils.js"></script> 6 <div id="imageDiv1"></div> 7 <div id="imageDiv2"></div> 8 <canvas id="canvas"></canvas> 9 <script> 10 11 function getImagePixel(image) 12 { 13 canvas.getContext("2d").drawImage(image, 0, 0, 10, 10); 14 return canvas.getContext("2d").getImageData(0, 0, 1, 1).data; 15 } 16 17 let resolve; 18 promise_test(async (t) => { 19 const url = "image.py?id=" + token(); 20 21 let promise = new Promise(r => resolve = r); 22 imageDiv1.innerHTML = `<img src="${url}" onload="resolve()"></img>`; 23 await promise; 24 25 const url2 = "image.py?id=" + token(); 26 promise = new Promise(r => resolve = r); 27 imageDiv1.innerHTML = `<img src="${url2}" onload="resolve()"></img>`; 28 await promise; 29 30 promise = new Promise(r => resolve = r); 31 imageDiv2.innerHTML = `<img id="image2" src="${url}" onload="resolve()"></img>`; 32 await promise; 33 34 assert_array_equals(getImagePixel(image2), [0, 255, 0, 255]); 35 }, "Images can bypass no-cache"); 36 </script>