Add ability to get matching IDs from Redump

DICUI.Library/Web/CookieAwareWebClient.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Net;
+
+namespace DICUI.Web
+{
+    // https://stackoverflow.com/questions/1777221/using-cookiecontainer-with-webclient-class
+    public class CookieAwareWebClient : WebClient
+    {
+        private readonly CookieContainer m_container = new CookieContainer();
+
+        protected override WebRequest GetWebRequest(Uri address)
+        {
+            WebRequest request = base.GetWebRequest(address);
+            HttpWebRequest webRequest = request as HttpWebRequest;
+            if (webRequest != null)
+            {
+                webRequest.CookieContainer = m_container;
+            }
+
+            return request;
+        }
+
+        /// <summary>
+        /// Get the last downloaded filename, if possible
+        /// </summary>
+        /// <returns></returns>
+        public string GetLastFilename()
+        {
+            // Try to extract the filename from the Content-Disposition header
+            if (!String.IsNullOrEmpty(this.ResponseHeaders["Content-Disposition"]))
+                return this.ResponseHeaders["Content-Disposition"].Substring(this.ResponseHeaders["Content-Disposition"].IndexOf("filename=") + 9).Replace("\"", "");
+
+            return null;
+        }
+    }
+}