Added PassIfNotFound to XPathExtractionRule

@@ -52,6 +52,11 @@ namespace WebTest.WebService.Plugin.Runtime
             set { randomMatch = value; }
         }
 
+        [DisplayName("Pass if not found")]
+        [Description("If set to true, this rule will pass the request even if no match is found.")]
+        [DefaultValue(false)]
+        public bool passIfNotFound { get; set; }
+
         /// <summary>
         /// The Extract method.  The parameter e contains the Web test context.
         /// </summary>
@@ -62,11 +67,7 @@ namespace WebTest.WebService.Plugin.Runtime
             try
             {
                 ContentHandler contentHandler = ContentHandlerFactory.GetHandler(e.Response.ContentType);
-                if (contentHandler == null)
-                {
-                    return;
-                }
-
+                if (contentHandler != null) {
                     if (contentHandler.IsBinary)
                     {
                         contentHandler.MessageBytes = e.Response.BodyBytes;
@@ -114,12 +115,14 @@ namespace WebTest.WebService.Plugin.Runtime
                         return;
                     }
                 }
+            }
             catch (Exception ex)
             {
                 e.Message = ex.Message;
             }
 
-            e.Success = false;
+            e.Success = passIfNotFound;
+            e.Message += " (XPath not found)";
             return;
         }
     }