43 lines
1.3 KiB
JavaScript
43 lines
1.3 KiB
JavaScript
/**
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* Adapted from https://dxr.mozilla.org/mozilla-central/rev/
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* 4e883591bb5dff021c108d3e30198a99547eed1e/layout/reftests/backgrounds/
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* delay-image-response.sjs
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*/
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"use strict";
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// A 1x1 PNG image.
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// Source: https://commons.wikimedia.org/wiki/File:1x1.png (Public Domain)
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const IMAGE = atob("iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQMAAAAl21bKAAAAA1BMVEUAA" +
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"ACnej3aAAAAAXRSTlMAQObYZgAAAApJREFUCNdjYAAAAAIAAeIhvDMAAAAASUVORK5CYII=");
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// To avoid GC.
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let timer = null;
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function handleRequest(request, response) {
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let query = {};
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request.queryString.split("&").forEach(function(val) {
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let [name, value] = val.split("=");
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query[name] = unescape(value);
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});
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response.setStatusLine(request.httpVersion, 200, "OK");
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response.setHeader("Content-Type", "image/png", false);
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// If there is no delay, we write the image and leave.
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if (!("delay" in query)) {
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response.write(IMAGE);
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return;
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}
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// If there is a delay, we create a timer which, when it fires, will write
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// image and leave.
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response.processAsync();
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const nsITimer = Components.interfaces.nsITimer;
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timer = Components.classes["@mozilla.org/timer;1"].createInstance(nsITimer);
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timer.initWithCallback(function() {
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response.write(IMAGE);
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response.finish();
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}, query.delay, nsITimer.TYPE_ONE_SHOT);
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}
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