// Make sure we remove any existing headers before
			// proxying the request to another node.
			for k := range w.Header() {
				w.Header().Del(k)
			}
			ctx := newContext(r, w, "SiteReplicationUploadForwarding")
			defer logger.AuditLog(ctx, w, r, mustGetClaimsFromToken(r))
			globalForwarder.ServeHTTP(w, r)
			return
		}
		h.ServeHTTP(w, r)
	})