The Web Sessions list contains the list of HTTP Requests that are sent by your computer. You can resize and reorder the columns in this list for your convenience. You can also sort this list by clicking on the column header.
Certain key information is available in this list, including:
- # - An ID# of the request generated by Fiddler for your convenience
- Result - The Result code from the HTTP Response.
- Protocol - The Protocol (HTTP/HTTPS/FTP) used by this session
- Host - The hostname of the server to which the request was sent
- URL - The path and file requested from the server
- Body - The number of bytes in the Response body
- Caching - Values from the Response's Expires or Cache-Control headers
- Process - The local Windows Process from which the traffic originated
- Content-Type - The Content-Type header from the Response
- Custom - A text field you can set via scripting.
- Comments - A text field you can set from scripting or the session's context menu
In Fiddler v2.2.0.5 and later, you can add new columns of your choice.
The default text coloring of the Session entries derives from the HTTP Status (red for errors, yellow for authentication demands), traffic type (CONNECT appears in grey), or response type (CSS in purple, HTML in blue; script in green, images in grey). You can override a session's text color using the ui-color flag in FiddlerScript.
Each session is marked with an icon for quick reference:
Request is being sent to the server
Response is being read from the server
Request is paused at a breakpoint
Response is paused at a breakpoint
Request used HTTP HEAD method; response should have no body
Request used HTTP POST method
Request used HTTP CONNECT method; this establishes a tunnel used for HTTPS traffic
Response was HTML
Response was an image
Response was a script
Response was Cascading Style Sheet
Response was XML
Response was JSON
Response was an audio file
Response was a video file
Response was a Silverlight applet
Response was a Flash applet
Response was a font
Generic successful response
Response was HTTP/300,301,302,303 or 307 redirect
Response was HTTP/304: Use cached version
Response was a request for client credentials
Response was a server error
Session was aborted by the client, Fiddler, or the Server.