Source code
Revision control
Copy as Markdown
Other Tools
"use strict";
function handleRequest(request, response) {
let qs = new URLSearchParams(request.queryString);
let asset = qs.get("as");
var action = qs.get("action");
let hinted = qs.get("hinted") !== "0";
let httpCode = qs.get("code");
let header_referrer_policy = qs.get("header_referrer_policy");
let link_referrer_policy = qs.get("link_referrer_policy");
// eslint-disable-next-line mozilla/use-services
let uuidGenerator = Cc["@mozilla.org/uuid-generator;1"].getService(
Ci.nsIUUIDGenerator
);
let uuid = uuidGenerator.generateUUID().toString();
let url = `early_hint_pixel.sjs?as=${asset}&uuid=${uuid}`;
if (action === "get_request_referrer_results") {
response.setHeader("Cache-Control", "no-cache", false);
response.setHeader("Content-Type", "text/plain", false);
response.write(getSharedState("requestReferrer"));
return;
} else if (action === "reset_referrer_results") {
response.setHeader("Cache-Control", "no-cache", false);
response.setHeader("Content-Type", "text/plain", false);
response.write(setSharedState("requestReferrer", "not set"));
return;
}
// write to raw socket
response.seizePower();
if (hinted) {
response.write("HTTP/1.1 103 Early Hint\r\n");
if (header_referrer_policy) {
response.write(
`Referrer-Policy: ${header_referrer_policy.replaceAll('"', "")}\r\n`
);
}
response.write(
`Link: <${url}>; rel=preload; as=${asset}; ${
link_referrer_policy ? "referrerpolicy=" + link_referrer_policy : ""
} \r\n`
);
response.write("\r\n");
}
let body = "";
if (asset === "image") {
body = `<!DOCTYPE html>
<html>
<body>
<img src="${url}" width="100px">
</body>
</html>`;
} else if (asset === "style") {
body = `<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" type="text/css" href="${url}">
</head>
<body>
<h1>Test preload css<h1>
<div id="square" style="width:100px;height:100px;">
</body>
</html>
`;
} else if (asset === "script") {
body = `<!DOCTYPE html>
<html>
<head>
<script src="${url}"></script>
</head>
<body>
<h1>Test preload javascript<h1>
<div id="square" style="width:100px;height:100px;">
</body>
</html>
`;
} else if (asset === "fetch") {
body = `<!DOCTYPE html>
<html>
<body onload="onLoad()">
<script>
function onLoad() {
fetch("${url}")
.then(r => r.text())
.then(r => document.getElementsByTagName("h2")[0].textContent = r);
}
</script>
<h1>Test preload fetch</h1>
<h2>Fetching...</h2>
</body>
</html>
`;
} else if (asset === "font") {
body = `<!DOCTYPE html>
<html>
<head>
<style>
@font-face {
font-family: "preloadFont";
src: url("${url}") format("woff");
}
body {
font-family: "preloadFont";
}
</style>
</head>
<body>
<h1>Test preload font<h1>
</body>
</html>
`;
}
if (!httpCode) {
response.write(`HTTP/1.1 200 OK\r\n`);
} else {
response.write(`HTTP/1.1 ${httpCode} Error\r\n`);
}
response.write("Content-Type: text/html;charset=utf-8\r\n");
response.write("Cache-Control: no-cache\r\n");
response.write(`Content-Length: ${body.length}\r\n`);
response.write("\r\n");
response.write(body);
response.finish();
}