First public commit

utils/absolute-url.ts

@@ -0,0 +1,36 @@
+// Source: https://github.com/jakeburden/next-absolute-url/blob/1d96d1d2a2a2308db60ce53a130b5d47aab3ee25/index.ts
+import { IncomingMessage } from "http";
+
+function absoluteUrl(
+  req?: IncomingMessage,
+  localhostAddress = "localhost:3000",
+) {
+  let host =
+    (req?.headers ? req.headers.host : window.location.host) ||
+    localhostAddress;
+  let protocol = /^localhost(:\d+)?$/.test(host) ? "http:" : "https:";
+
+  if (
+    req &&
+    req.headers["x-forwarded-host"] &&
+    typeof req.headers["x-forwarded-host"] === "string"
+  ) {
+    host = req.headers["x-forwarded-host"];
+  }
+
+  if (
+    req &&
+    req.headers["x-forwarded-proto"] &&
+    typeof req.headers["x-forwarded-proto"] === "string"
+  ) {
+    protocol = `${req.headers["x-forwarded-proto"]}:`;
+  }
+
+  return {
+    protocol,
+    host,
+    origin: protocol + "//" + host,
+  };
+}
+
+export default absoluteUrl;