Patch for DIRAPI-402

Author: elecharny

ldap/model/src/main/java/org/apache/directory/api/ldap/model/url/LdapUrl.java

@@ -223,8 +223,14 @@ private void parse( char[] chars ) throws LdapURLEncodingException
         }
         scheme = new String( chars, 0, pos );
 
-        // The hostport
+        // The hostport, if it exists
+        if ( pos == chars.length )
+        {
+            return;
+        }
+        
         pos = parseHostPort( chars, pos );
+        
         if ( pos == -1 )
         {
             throw new LdapURLEncodingException( I18n.err( I18n.ERR_13031_INVALID_HOST_PORT ) );

ldap/model/src/test/java/org/apache/directory/api/ldap/model/url/LdapUrlTest.java

@@ -1690,4 +1690,13 @@ public void hangingLdapUrl()
     {
     	assertThrows( LdapURLEncodingException.class, () -> new LdapUrl( "ldap://[1:2:ldap:///o" ) );
     }
+    
+    
+    @Test
+    public void indexOutOfRangeLdapUrl() throws LdapURLEncodingException
+    {
+        LdapUrl ldapUrl = new LdapUrl( "ldap://" );
+    
+        assertNull( ldapUrl.getHost() );
+    }
 }