node: normalize HTTP vhost host matching (#34693)

node/rpcstack.go

@@ -463,6 +463,7 @@ func (h *virtualHostHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		// Either invalid (too many colons) or no port specified
 		host = r.Host
 	}
+	host = strings.ToLower(host)
 	if ipAddr := net.ParseIP(host); ipAddr != nil {
 		// It's an IP address, we can serve that
 		h.next.ServeHTTP(w, r)

node/rpcstack_test.go

@@ -60,6 +60,9 @@ func TestVhosts(t *testing.T) {
 	resp := rpcRequest(t, url, testMethod, "host", "test")
 	assert.Equal(t, resp.StatusCode, http.StatusOK)
 
+	respUpper := rpcRequest(t, url, testMethod, "host", "TeSt:1234")
+	assert.Equal(t, respUpper.StatusCode, http.StatusOK)
+
 	resp2 := rpcRequest(t, url, testMethod, "host", "bad")
 	assert.Equal(t, resp2.StatusCode, http.StatusForbidden)
 }