src/app/core: forward client user-agent

Forward the client's user-agent instead of sending Node's.

Author: alanorth

src/app/core/forward-client-ip/forward-client-ip.interceptor.ts

@@ -18,6 +18,14 @@ export class ForwardClientIpInterceptor implements HttpInterceptor {
    */
   intercept(httpRequest: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
     const clientIp = this.req.get('x-forwarded-for') || this.req.connection.remoteAddress;
-    return next.handle(httpRequest.clone({ setHeaders: { 'X-Forwarded-For': clientIp } }));
+    const headers = { 'X-Forwarded-For': clientIp };
+
+    // if the request has a user-agent retain it
+    const userAgent = this.req.get('user-agent');
+    if (userAgent) {
+      headers['User-Agent'] = userAgent;
+    }
+
+    return next.handle(httpRequest.clone({ setHeaders: headers }));
   }
 }