Pm.request manipulation not working before the request is sent

[rustnnespp (Diego Bandeira)]

Hi, Postman Community!

Is it possible to use the pm.request.auth property or the pm.request.authorizeUsing() function, so I can handle authorization for requests in a pre-request script?

I tried to set the property like the following:

// either this object
const authz = {
  type: 'bearer',
  bearer: [
    {
      type: 'any',
      value: [
        {
          type: 'any',
          value: 'token value',
          key: 'token',
        },
      ],
      key: 'bearer',
    },
  ],
};

// or this another object
const authz = {
  type: 'bearer',
  bearer: [
    {
      type: 'any',
      value: 'token value',
      key: 'token',
    },
  ],
};

// either this way
pm.request.auth = authz;

// either this another way
pm.request.authorizeUsing(authz);

but none of them worked.

For the next examples, I had to setup the request Auth tab with type Bearer and a token generated previously, as I could not get the examples above to work.

Debugging the request, seems like I can only access and manipulate the auth property and the Authorization header after the request is sent.

The pre-request script for the request is:

// stage 1: the initial state of the request
console.log("request before")
console.log(pm.request.toJSON())

// stage 2: removing auth header and auth property
// from the request
pm.request.removeHeader('Authorization')
pm.request.auth = null

// stage 3: request after change; same result,
// except for the new property auth
console.log("request after")
console.log(pm.request.toJSON())

The post-response script for the request is:

// stage 4: request was sent already;
// but auth header is present and auth property is defined
console.log("response before")
console.log(pm.request.toJSON())

// stage 5: removing auth header and auth property
// again from the request
pm.request.removeHeader('Authorization')
pm.request.auth = null

// stage 6: auth header removed and auth property null
console.log("response after")
console.log(pm.request.toJSON())

The results for the scripts above is showed in the image below.