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// small red image
const IMG = atob(
"iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12" +
"P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="
);
const PDF = `%PDF-1.0
1 0 obj<</Type/Catalog/Pages 2 0 R>>endobj 2 0 obj<</Type/Pages/Kids[3 0 R]/Count 1>>endobj 3 0 obj<</Type/Page/MediaBox[0 0 3 3]>>endobj
trailer<</Size 4/Root 1 0 R>>`;
function getSniffableContent(type) {
switch (type) {
case "xml":
return `<?xml version="1.0"?><test/>`;
case "html":
return `<!Doctype html> <html> <head></head> <body> Test test </body></html>`;
case "css":
return `*{ color: pink !important; }`;
case "json":
return `{ 'test':'yes' }`;
case "img":
return IMG;
case "pdf":
return PDF;
}
return "Basic UTF-8 Text";
}
function handleRequest(request, response) {
let query = new URLSearchParams(request.queryString);
// avoid confusing cache behaviors (XXXX no sure what this means?)
response.setHeader("X-Content-Type-Options", "nosniff"); // Disable Sniffing
response.setHeader("Content-Type", query.get("mime"));
response.write(getSniffableContent(query.get("content")));
}