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index.js
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index.js
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let securityHeaders = {
"Content-Security-Policy" : "upgrade-insecure-requests",
"Strict-Transport-Security" : "max-age=1000",
"X-Xss-Protection" : "1; mode=block",
"X-Frame-Options" : "DENY",
"X-Content-Type-Options" : "nosniff",
"Referrer-Policy" : "strict-origin-when-cross-origin",
"Permissions-Policy" : "microphone 'none'; geolocation 'none'; camera 'none'"
}
let sanitiseHeaders = {
"Server" : "My New Server Header!!!",
}
let removeHeaders = [
"Public-Key-Pins",
"X-Powered-By",
"X-AspNet-Version",
]
addEventListener('fetch', event => {
event.respondWith(addHeaders(event.request))
})
async function addHeaders(req) {
let response = await fetch(req)
let newHdrs = new Headers(response.headers)
if (newHdrs.has("Content-Type") && !newHdrs.get("Content-Type").includes("text/html")) {
return new Response(response.body , {
status: response.status,
statusText: response.statusText,
headers: newHdrs
})
}
Object.keys(securityHeaders).map(function(name, index) {
newHdrs.set(name, securityHeaders[name]);
})
Object.keys(sanitiseHeaders).map(function(name, index) {
newHdrs.set(name, sanitiseHeaders[name]);
})
removeHeaders.forEach(function(name){
newHdrs.delete(name)
})
return new Response(response.body , {
status: response.status,
statusText: response.statusText,
headers: newHdrs
})
}