Build a Custom Importer or Exporter

Sample Extension

1. Create a Fiddler Classic extension project.

2. Modify the default class1.cs (or create a new class) in your project as follows:

   using System;
   using System.IO;
   using System.Text;
   using System.Windows.Forms;
   using Fiddler;
   using System.Diagnostics;
   using System.Reflection;
   [assembly: AssemblyVersion("1.0.0.0")]
   [assembly: Fiddler.RequiredVersion("2.4.0.0")]
   
   
   [ProfferFormat("TAB-Separated Values", "Session List in Tab-Delimited Format")]
   [ProfferFormat("Comma-Separated Values", 
       "Session List in Comma-Delimited Format; import into Excel or other tools")]
   
   public class CSVTranscoder: ISessionExporter  // Ensure class is public, or Fiddler Classic won't see it!
   {
     public bool ExportSessions(string sFormat, Session[] oSessions, Dictionary<string, object> dictOptions,
         EventHandler<ProgressCallbackEventArgs> evtProgressNotifications)
     {
       bool bResult = false; 
       string chSplit;
   
       // Determine if we already have a filename from the dictOptions collection
       string sFilename = null;
       if (null != dictOptions && dictOptions.ContainsKey("Filename"))
       {
         sFilename = dictOptions["Filename"] as string;
       }
   
       if (sFormat == "Comma-Separated Values")
       {
         chSplit = ",";
         if (string.IsNullOrEmpty(sFilename)) sFilename = Fiddler.Utilities.ObtainSaveFilename("Export As " + sFormat, "CSV Files (*.csv)|*.csv");
       }
       else
       {
         chSplit = "\t";
         if (string.IsNullOrEmpty(sFilename)) sFilename = Fiddler.Utilities.ObtainSaveFilename("Export As " + sFormat, "TSV Files (*.tsv)|*.tsv");
       }
   
       if (String.IsNullOrEmpty(sFilename)) return false;
   
       try
       {
         StreamWriter swOutput = new StreamWriter(sFilename, false, Encoding.UTF8);
         int iCount = 0;
         int iMax = oSessions.Length;
   
         #region WriteColHeaders
         bool bFirstCol = true;
         foreach (ColumnHeader oLVCol in FiddlerApplication.UI.lvSessions.Columns)
         {
           if (!bFirstCol)
           {
           swOutput.Write(chSplit);
           }
           else
           {
           bFirstCol = false;
           }
           swOutput.Write(oLVCol.Text.Replace(chSplit, ""));
           }
           swOutput.WriteLine();
           #endregion WriteColHeaders
   
           #region WriteEachSession
           foreach (Session oS in oSessions)
           {
           iCount++;
           if (null != oS.ViewItem)
           {
           bFirstCol = true;
           ListViewItem oLVI = (oS.ViewItem as ListViewItem);
           if (null == oLVI) continue;
           foreach (ListViewItem.ListViewSubItem oLVC in oLVI.SubItems)
           {
             if (!bFirstCol)
           {
             swOutput.Write(chSplit);
           }
           else
           {
             bFirstCol = false;
           } 
   
             swOutput.Write(oLVC.Text.Replace(chSplit, ""));
           }
   
           swOutput.WriteLine();
         }
   
         if (null != evtProgressNotifications)
         {
           evtProgressNotifications(null, new ProgressCallbackEventArgs(, ));
           ProgressCallbackEventArgs PCEA = new ProgressCallbackEventArgs((iCount/(float)iMax), "wrote " + iCount.ToString() + " records.");
           evtProgressNotifications(null, PCEA);
           if (PCEA.Cancel) { swOutput.Close(); return false; }
         }
       }
       #endregion WriteEachSession
   
       swOutput.Close();
       bResult = true;
       }
       catch (Exception eX)
       {
         MessageBox.Show(eX.Message, "Failed to export");
         bResult = false;
        }
     }
     return bResult;
     }
   
     public void Dispose()
     {
     }
   }
   

3. Compile and load your extension in Fiddler.

See Also

Build extension assemblies to run in both Fiddler Classic versions 2 and 4