Support data URI as Icon

Wox/Helper/DataWebRequestFactory.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Net;
+using System.Text;
+
+namespace Wox.Helper
+{
+    public class DataWebRequestFactory : IWebRequestCreate
+    {
+        class DataWebRequest : WebRequest
+        {
+            private readonly Uri m_uri;
+
+            public DataWebRequest(Uri uri)
+            {
+                m_uri = uri;
+            }
+
+            public override WebResponse GetResponse()
+            {
+                return new DataWebResponse(m_uri);
+            }
+        }
+
+        class DataWebResponse : WebResponse
+        {
+            private readonly string m_contentType;
+            private readonly byte[] m_data;
+
+            public DataWebResponse(Uri uri)
+            {
+                string uriString = uri.AbsoluteUri;
+
+                int commaIndex = uriString.IndexOf(',');
+                var headers = uriString.Substring(0, commaIndex).Split(';');
+                m_contentType = headers[0];
+                string dataString = uriString.Substring(commaIndex + 1);
+                m_data = Convert.FromBase64String(dataString);
+            }
+
+            public override string ContentType
+            {
+                get { return m_contentType; }
+                set
+                {
+                    throw new NotSupportedException();
+                }
+            }
+
+            public override long ContentLength
+            {
+                get { return m_data.Length; }
+                set
+                {
+                    throw new NotSupportedException();
+                }
+            }
+
+            public override Stream GetResponseStream()
+            {
+                return new MemoryStream(m_data);
+            }
+        }
+
+        public WebRequest Create(Uri uri)
+        {
+            return new DataWebRequest(uri);
+        }
+    }
+}