From eb10488c1f5759716a89bcb538aaf1d0ed2797a8 Mon Sep 17 00:00:00 2001
From: Sonja Happ <sonja.happ@eonerc.rwth-aachen.de>
Date: Fri, 20 Mar 2020 15:33:16 +0100
Subject: [PATCH] check if AMQP host is set before attempting to connect

---
 start.go | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/start.go b/start.go
index 9463126..6616bed 100644
--- a/start.go
+++ b/start.go
@@ -208,11 +208,13 @@ func main() {
 		panic(err)
 	}
 
-	// create amqp URL based on username, password and host
-	amqpurl := "amqp://" + amqpuser + ":" + amqppass + "@" + amqphost
-	err = connectAMQP(amqpurl, api)
-	if err != nil {
-		panic(err)
+	if amqphost != "" {
+		// create amqp URL based on username, password and host
+		amqpurl := "amqp://" + amqpuser + ":" + amqppass + "@" + amqphost
+		err = connectAMQP(amqpurl, api)
+		if err != nil {
+			panic(err)
+		}
 	}
 
 	// server at port 4000 to match frontend's redirect path