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Test a webservice using basic authentication with Fiddler

Last week I had to investigate an issue in an old webservice that was still using basic authentication(on a not enforced HTTPS connection Confused smile). With basic authentication you have to send a Base64 encoded version of your username/password combination to the server(that explains immediatelly why using basic authentication over a HTTP connection is never a good idea).

I had to the test the service but the only tool I had available on the server was Fiddler.

So let’s start by creating the Base64 encoded version of our message:

  • Open Fiddler
  • Go to Tools –> TextWizard…
  • Type your username password combination separated by a ‘:’, e.g. username:password
  • Choose ToBase64 from the Transform list
  • Copy the generated string

image

Next step is to create our request:

  • Go to the Composer tab
  • Type “Authorization: Basic’’after the User-Agent string and add the generated string to the end. The result should look like this:
Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ=

image

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