[blam] FeedUpdater: Add simple filtering

[Carlos Martín Nieto <cmartin src gnome org>]

commit 3b91b4726fb887c3b7e3b9185b1a552b1d3bbaf5
Author: Carlos Martín Nieto <carlos cmartin tk>
Date:   Sun Mar 27 14:37:22 2011 +0200

    FeedUpdater: Add simple filtering
    
    If the first load doesn't succeed, pass it through a filter and try
    again.
    
    Signed-off-by: Carlos Martín Nieto <carlos cmartin tk>

 src/FeedUpdater.cs |   14 +++++++++-----
 src/Filter.cs      |   27 +++++++++++++++++++++++++++
 src/Makefile.am    |    3 ++-
 3 files changed, 38 insertions(+), 6 deletions(-)
---
diff --git a/src/FeedUpdater.cs b/src/FeedUpdater.cs
index 92053de..673175f 100644
--- a/src/FeedUpdater.cs
+++ b/src/FeedUpdater.cs
@@ -46,13 +46,17 @@ namespace Imendio.Blam {
             XmlTextReader reader = null;
             SyndicationFeed feed = null;
             try{
-                System.Console.WriteLine("about to read {0}", channel.Url);
                 reader = new XmlTextReader(channel.Url);
-                if(reader == null){
-                    System.Console.WriteLine("Can't init reader");
-                }
-                System.Console.WriteLine("xml reader done");
                 feed = SyndicationFeed.Load(reader);
+            } catch(XmlException e){
+                Console.Error.WriteLine("Need to filter {0}", channel.Url);
+                reader = Filter.FromUrl(channel.Url);
+                try{
+                    feed = SyndicationFeed.Load(reader);
+                } catch(Exception ex){
+                    System.Console.WriteLine("Filter didn't help: {0}", e.Message);
+                    return false;
+                }
             } catch(Exception e){
                 System.Console.WriteLine("Ex caught: {0}", e.Message);
                 return false;
diff --git a/src/Filter.cs b/src/Filter.cs
new file mode 100644
index 0000000..e1474be
--- /dev/null
+++ b/src/Filter.cs
@@ -0,0 +1,27 @@
+using System;
+using System.Net;
+using System.Xml;
+using System.Text.RegularExpressions;
+using System.IO;
+
+namespace Imendio.Blam
+{
+    public class Filter
+    {
+        static public XmlTextReader FromUrl(string url)
+        {
+            string orig;
+            try {
+                WebClient client = new WebClient();
+                orig = client.DownloadString(url);
+            } catch (Exception ex) {
+                Console.Error.WriteLine("Can't download {0}: {1}", url, ex.Message);
+                return null;
+            }
+
+            Regex regex = new Regex(@"\x0C");
+            string result = regex.Replace(orig, String.Empty);
+            return new XmlTextReader(new StringReader(result));
+        }
+    }
+}
diff --git a/src/Makefile.am b/src/Makefile.am
index 7ea194e..a2cd0f7 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -35,7 +35,8 @@ BLAM_CSFILES = Application.cs \
 	       TrayIcon.cs \
 	       Utils.cs \
 	       Proxy.cs \
-	       ItemStore.cs
+	       ItemStore.cs \
+	       Filter.cs
 
 GENERATED_CSFILES = \
 	       Defines.cs