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// Generate response header "Link: <HREF>; rel=preconnect"
// HREF is provided by the request header X-Link
function handleRequest(request, response) {
response.setHeader("Cache-Control", "no-cache", false);
response.setHeader(
"Link",
"<" +
request.queryString +
">; rel=preconnect" +
", " +
"<" +
request.queryString +
">; rel=preconnect; crossOrigin=anonymous"
);
response.write("check that header");
}