*) don't accept messages without subject or payload

See: http://www.yacy-forum.de/viewtopic.php?p=21656

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@2115 6c8d7289-2bf4-0310-a012-ef5d649a1542

htroot/yacy/message.java

@@ -121,7 +121,14 @@ public final class message {
             yacySeed otherSeed = yacySeed.genRemoteSeed(otherSeedString, key, true);
 
             String subject = crypt.simpleDecode(post.get("subject", ""), key); // message's subject
+            subject = subject.trim();
             String message = crypt.simpleDecode(post.get("message", ""), key); // message body
+            message = message.trim();
+            
+            if (subject.length() == 0 && message.length() == 0) {
+                prop.put("response", "-1"); // don't accept empty messages
+                return prop;
+            }
             
             prop.put("response", "Thank you!");