From c5197dbe1720fecaf84f9a9a95a845eecc97f92f Mon Sep 17 00:00:00 2001
From: Stephan <sgay@pilotine.com>
Date: Sat, 7 Sep 2013 10:24:52 +0200
Subject: [PATCH] U4-2807 - better exception message on bogus domain

---
 src/Umbraco.Core/StringExtensions.cs    | 52 +++++++++++++++++++++++++
 src/Umbraco.Web/Routing/DomainAndUri.cs | 12 +++++-
 2 files changed, 63 insertions(+), 1 deletion(-)

diff --git a/src/Umbraco.Core/StringExtensions.cs b/src/Umbraco.Core/StringExtensions.cs
index 87b4c676b5..e730bafbdc 100644
--- a/src/Umbraco.Core/StringExtensions.cs
+++ b/src/Umbraco.Core/StringExtensions.cs
@@ -28,6 +28,17 @@ namespace Umbraco.Core
         [UmbracoWillObsolete("Do not use this constants. See IShortStringHelper.CleanStringForSafeAliasJavaScriptCode.")]
         public const string UmbracoInvalidFirstCharacters = "01234567890";
 
+        private static readonly char[] ToCSharpHexDigitLower = "0123456789abcdef".ToCharArray();
+        private static readonly char[] ToCSharpEscapeChars;
+        
+        static StringExtensions()
+        {
+            var escapes = new[] { "\aa", "\bb", "\ff", "\nn", "\rr", "\tt", "\vv", "\"\"", "\\\\", "??", "\00" };
+            ToCSharpEscapeChars = new char[escapes.Max(e => e[0]) + 1];
+            foreach (var escape in escapes)
+                ToCSharpEscapeChars[escape[0]] = escape[1];
+        }
+
         internal static string ReplaceNonAlphanumericChars(this string input, char replacement)
         {
             //any character that is not alphanumeric, convert to a hyphen
@@ -1085,5 +1096,46 @@ namespace Umbraco.Core
 
             return source;
         }
+
+        /// <summary>
+        /// Converts a literal string into a C# expression.
+        /// </summary>
+        /// <param name="s">Current instance of the string.</param>
+        /// <returns>The string in a C# format.</returns>
+        public static string ToCSharpString(this string s)
+        {
+            if (s == null) return "<null>";
+
+            // http://stackoverflow.com/questions/323640/can-i-convert-a-c-sharp-string-value-to-an-escaped-string-literal
+
+            var sb = new StringBuilder(s.Length + 2);
+            for (var rp = 0; rp < s.Length; rp++)
+            {
+                var c = s[rp];
+                if (c < ToCSharpEscapeChars.Length && '\0' != ToCSharpEscapeChars[c])
+                    sb.Append('\\').Append(ToCSharpEscapeChars[c]);
+                else if ('~' >= c && c >= ' ')
+                    sb.Append(c);
+                else
+                    sb.Append(@"\x")
+                      .Append(ToCSharpHexDigitLower[c >> 12 & 0x0F])
+                      .Append(ToCSharpHexDigitLower[c >> 8 & 0x0F])
+                      .Append(ToCSharpHexDigitLower[c >> 4 & 0x0F])
+                      .Append(ToCSharpHexDigitLower[c & 0x0F]);
+            }
+
+            return sb.ToString();
+
+            // requires full trust
+            /*
+            using (var writer = new StringWriter())
+            using (var provider = CodeDomProvider.CreateProvider("CSharp"))
+            {
+                provider.GenerateCodeFromExpression(new CodePrimitiveExpression(s), writer, null);
+                return writer.ToString().Replace(string.Format("\" +{0}\t\"", Environment.NewLine), "");
+            }
+            */
+        }
+
     }
 }
diff --git a/src/Umbraco.Web/Routing/DomainAndUri.cs b/src/Umbraco.Web/Routing/DomainAndUri.cs
index ba13508812..ec3e52ff11 100644
--- a/src/Umbraco.Web/Routing/DomainAndUri.cs
+++ b/src/Umbraco.Web/Routing/DomainAndUri.cs
@@ -1,4 +1,5 @@
 using System;
+using Umbraco.Core;
 using umbraco.cms.businesslogic.web;
 
 namespace Umbraco.Web.Routing
@@ -20,7 +21,16 @@ namespace Umbraco.Web.Routing
         public DomainAndUri(Domain domain, string scheme)
         {
             Domain = domain;
-            Uri = new Uri(UriUtility.TrimPathEndSlash(UriUtility.StartWithScheme(domain.Name, scheme)));
+            try
+            {
+                Uri = new Uri(UriUtility.TrimPathEndSlash(UriUtility.StartWithScheme(domain.Name, scheme)));
+            }
+            catch (UriFormatException)
+            {
+                var name = domain.Name.ToCSharpString();
+                throw new ArgumentException(string.Format("Failed to parse invalid domain: node id={0}, hostname=\"{1}\"."
+                    + " Hostname should be a valid uri.", domain.RootNodeId, name), "domain");
+            }
         }
 
         /// <summary>