Modify HTTP Headers in Internet Explorer

When accessing a few web applications, you may need to simulate/modify few HTTP Headers being passed.

If you are using Google Chrome or Mozilla Firefox to access your application, you have many plugins/extensions to take care of this. But if you want to access the same application using Internet Explorer, then the task gets tougher.

Let's take a look at how we can overcome this issue and access those applications in Internet Explorer.

• Download Fiddler.
• Open Rules > Customize rules. It’ll open the Fiddler ScriptEditor.

Find the function ‘static function OnBeforeRequest(oSession: Session)’ and add the headername and headervalue in below format and save & close the script editor.

oSession.oRequest["headerName"] = "headerValue";

After making above changes keep the fiddler open and access your web application. Internet Explorer now will accept the customized header values and your application will work just fine.

Note: This method can be used for accessing applications over Chrome and Firefox too. You don't need to install any extra plugins or extensions after making above changes.