Also include a test and fix to createUri that bails if the host is empty #560.

Author: Sheridan C Rawlins

api/src/main/java/org/asynchttpclient/util/AsyncHttpProviderUtils.java

@@ -61,6 +61,10 @@ public final static URI createUri(String u) {
             return URI.create(u + "/");
         }
 
+        if (uri.getHost() == null) {
+            throw new IllegalArgumentException("The URI host, of the URI " + uri + ", must be non-null.");
+        }
+
         return uri;
     }
 

api/src/test/java/org/asynchttpclient/util/AsyncHttpProviderUtilsTest.java

@@ -13,6 +13,7 @@
 package org.asynchttpclient.util;
 
 import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.fail;
 
 import org.testng.annotations.Test;
 
@@ -44,4 +45,14 @@ public void getRedirectUriShouldHandleRelativeLocation() {
         URI uri = AsyncHttpProviderUtils.getRedirectUri(URI.create("http://www.ebay.de"), url);
         assertEquals(uri.toString(), "http://www.ebay.de/sch/sis.html;jsessionid=92D73F80262E3EBED7E115ED01035DDA?_nkw=FSC%20Lifebook%20E8310%20Core2Duo%20T8100%202%201GHz%204GB%20DVD%20RW&_itemId=150731406505");
     }
+    
+    @Test(groups = "fast")
+    public void createUriFailsWithBadHost() throws Exception {
+        try {
+            final String BAD_HOST_URL = "http:///";
+            URI uri = AsyncHttpProviderUtils.createUri(BAD_HOST_URL);
+            fail("Expected IllegalArgumentException for url: " + BAD_HOST_URL);
+        } catch (IllegalArgumentException ex) {
+        }
+    }
 }