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// Server handler that counts requests per key and serves responses
// with configurable cache headers. Used to test prefetch cache behavior
function handleRequest(request, response) {
let params = new URLSearchParams(request.queryString);
let key = params.get("key") || "default";
let mode = params.get("mode") || "content";
if (mode === "count") {
response.setStatusLine(request.httpVersion, 200, "OK");
response.setHeader("Content-Type", "text/plain", false);
response.setHeader("Cache-Control", "no-store", false);
let count = getSharedState(key) || "0";
response.write(count);
return;
}
if (mode === "reset") {
setSharedState(key, "0");
response.setStatusLine(request.httpVersion, 200, "OK");
response.setHeader("Content-Type", "text/plain", false);
response.setHeader("Cache-Control", "no-store", false);
response.write("reset");
return;
}
// Content mode: increment counter and serve response
let count = parseInt(getSharedState(key) || "0") + 1;
setSharedState(key, count.toString());
response.setStatusLine(request.httpVersion, 200, "OK");
let contentType = params.get("type") || "text/html";
response.setHeader("Content-Type", contentType, false);
let cacheControl = params.get("cache-control");
if (cacheControl) {
response.setHeader("Cache-Control", cacheControl, false);
}
// If no cache-control param, deliberately omit Cache-Control header
if (contentType === "application/javascript") {
response.write("// prefetched script " + count);
} else {
response.write(
"<html><body>Prefetched content " + count + "</body></html>"
);
}
}