8167223: URL handling improvements

Reviewed-by: prappo, chegar

src/share/classes/java/net/URLStreamHandler.java

@@ -161,9 +161,9 @@ public abstract class URLStreamHandler {
             (spec.charAt(start + 1) == '/')) {
             start += 2;
             i = spec.indexOf('/', start);
-            if (i < 0) {
+            if (i < 0 || i > limit) {
                 i = spec.indexOf('?', start);
-                if (i < 0)
+                if (i < 0 || i > limit)
                     i = limit;
             }
 
@@ -171,8 +171,14 @@ public abstract class URLStreamHandler {
 
             int ind = authority.indexOf('@');
             if (ind != -1) {
+                if (ind != authority.lastIndexOf('@')) {
+                    // more than one '@' in authority. This is not server based
+                    userInfo = null;
+                    host = null;
+                } else {
                     userInfo = authority.substring(0, ind);
                     host = authority.substring(ind+1);
+                }
             } else {
                 userInfo = null;
             }