File size: 1,218 Bytes
9d4a3b0 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 | function firstHeaderValue(value: string | null) {
return value?.split(",")[0]?.trim() || null;
}
function isValidForwardedHost(value: string | null) {
return !!value && /^([a-zA-Z0-9.-]+|\[[0-9a-fA-F:.]+\])(?::\d+)?$/.test(value);
}
export function requestOrigin(request: Request) {
const url = new URL(request.url);
const forwardedProto = firstHeaderValue(request.headers.get("x-forwarded-proto"));
const tlsTerminatedReference =
process.env.WEBSITEBENCH_DEPLOYMENT_PROFILE === "offline-harbor"
&& /^[0-9]+$/.test(process.env.WEBSITEBENCH_REFERENCE_UPSTREAM_PORT ?? "");
const protocol = forwardedProto === "https" || forwardedProto === "http"
? forwardedProto
: tlsTerminatedReference
? "https"
: url.protocol.replace(/:$/, "");
const forwardedHost = firstHeaderValue(request.headers.get("x-forwarded-host"));
const hostHeader = firstHeaderValue(request.headers.get("host"));
const host = isValidForwardedHost(forwardedHost)
? forwardedHost
: isValidForwardedHost(hostHeader)
? hostHeader
: url.host;
return `${protocol}://${host}`;
}
export function isHttpsRequest(request: Request) {
return requestOrigin(request).startsWith("https://");
}
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