From 847745c2563f0589c6ef2a541075a4d7f70d0317 Mon Sep 17 00:00:00 2001
From: Stef Heyenrath <stef.heyenrath@gmail.com>
Date: Thu, 19 Jan 2017 23:37:02 +0100
Subject: [PATCH] Added try-catch for return Matchers

---
 src/WireMock/Matchers/JSONPathMatcher.cs | 18 +++++++++++++-----
 src/WireMock/Matchers/RegexMatcher.cs    | 15 +++++++++++++--
 src/WireMock/Matchers/XPathMatcher.cs    | 16 ++++++++++++----
 3 files changed, 38 insertions(+), 11 deletions(-)

diff --git a/src/WireMock/Matchers/JSONPathMatcher.cs b/src/WireMock/Matchers/JSONPathMatcher.cs
index e2c6c306..6fa93bcf 100644
--- a/src/WireMock/Matchers/JSONPathMatcher.cs
+++ b/src/WireMock/Matchers/JSONPathMatcher.cs
@@ -1,4 +1,5 @@
-using JetBrains.Annotations;
+using System;
+using JetBrains.Annotations;
 using Newtonsoft.Json.Linq;
 using WireMock.Validation;
 
@@ -35,10 +36,17 @@ namespace WireMock.Matchers
             if (input == null)
                 return false;
 
-            JObject o = JObject.Parse(input);
-            JToken token = o.SelectToken(_pattern);
-
-            return token != null;
+            try
+            {
+                JObject o = JObject.Parse(input);
+                JToken token = o.SelectToken(_pattern);
+                
+                return token != null;
+            }
+            catch (Exception)
+            {
+                return false;
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/src/WireMock/Matchers/RegexMatcher.cs b/src/WireMock/Matchers/RegexMatcher.cs
index 657a137d..8c5eb707 100644
--- a/src/WireMock/Matchers/RegexMatcher.cs
+++ b/src/WireMock/Matchers/RegexMatcher.cs
@@ -1,4 +1,5 @@
-using System.Text.RegularExpressions;
+using System;
+using System.Text.RegularExpressions;
 using JetBrains.Annotations;
 using WireMock.Validation;
 
@@ -32,7 +33,17 @@ namespace WireMock.Matchers
         /// </returns>
         public bool IsMatch(string input)
         {
-            return input != null && _expression.IsMatch(input);
+            if (input == null)
+                return false;
+
+            try
+            {
+                return _expression.IsMatch(input);
+            }
+            catch (Exception)
+            {
+                return false;
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/src/WireMock/Matchers/XPathMatcher.cs b/src/WireMock/Matchers/XPathMatcher.cs
index 992b3fea..caa6b7b9 100644
--- a/src/WireMock/Matchers/XPathMatcher.cs
+++ b/src/WireMock/Matchers/XPathMatcher.cs
@@ -1,4 +1,5 @@
-using System.Xml;
+using System;
+using System.Xml;
 using JetBrains.Annotations;
 using WireMock.Validation;
 using Wmhelp.XPath2;
@@ -36,10 +37,17 @@ namespace WireMock.Matchers
             if (input == null)
                 return false;
 
-            var nav = new XmlDocument { InnerXml = input }.CreateNavigator();
-            object result = nav.XPath2Evaluate($"boolean({_pattern})");
+            try
+            {
+                var nav = new XmlDocument { InnerXml = input }.CreateNavigator();
+                object result = nav.XPath2Evaluate($"boolean({_pattern})");
 
-            return true.Equals(result);
+                return true.Equals(result);
+            }
+            catch (Exception)
+            {
+                return false;
+            }
         }
     }
 }
\ No newline at end of file