From 04fe5708119a079f2f6af7b8405d20612c7be474 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Richard=20K=C3=B6rber?= <github@shredzone.org>
Date: Sat, 12 Dec 2015 18:35:50 +0100
Subject: [PATCH] Return null if no URI is set

---
 .../org/shredzone/acme4j/challenge/GenericChallenge.java   | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/acme4j-client/src/main/java/org/shredzone/acme4j/challenge/GenericChallenge.java b/acme4j-client/src/main/java/org/shredzone/acme4j/challenge/GenericChallenge.java
index fa3e394f..31c66acd 100644
--- a/acme4j-client/src/main/java/org/shredzone/acme4j/challenge/GenericChallenge.java
+++ b/acme4j-client/src/main/java/org/shredzone/acme4j/challenge/GenericChallenge.java
@@ -60,8 +60,13 @@ public class GenericChallenge implements Challenge {
 
     @Override
     public URI getUri() {
+        String uri = get(KEY_URI);
+        if (uri == null) {
+            return null;
+        }
+
         try {
-            return new URI(get(KEY_URI).toString());
+            return new URI(uri);
         } catch (URISyntaxException ex) {
             throw new IllegalStateException("Invalid URI", ex);
         }