Postman Request Scripting: Extracting Values From Response And Setting Global Variable Values

Question

I am writing a pre-request script in Postman which is meant to set the value of a global variable, API_TOKEN.

pm.sendRequest({
    url: pm.globals.get("GET_API_TOKEN_URL"),
    method: "GET",
    header: {
        clientId: pm.globals.get("GET_API_TOKEN_CLIENT_ID"),
        clientSecret: pm.globals.get("GET_API_TOKEN_CLIENT_SECRET")
    }
}, function (error, response) {
    console.log(response)
    console.log(response.header)
    pm.globals.set("API_TOKEN", response.header[3].apitoken)
})

My issue is that console.log(response.header) logs undefined, even though console.log(response) logs an object with various fields just fine:

{
    id: ...
    status: ...
    code: ...
    header: [11]
    ...
}

Thanks in advance!

Answer 1

the trick was to access response.headers.all()[3].value instead of response.header[3].value.

https://learning.postman.com/docs/writing-scripts/script-references/postman-sandbox-api-reference/

pm.sendRequest({
    url: pm.globals.get("GET_API_TOKEN_URL"),
    method: "GET",
    header: {
        clientId: pm.globals.get("GET_API_TOKEN_CLIENT_ID"),
        clientSecret: pm.globals.get("GET_API_TOKEN_CLIENT_SECRET")
    }
}, function (error, response) {
    console.log(error ? error : response)
    if (error) {
        return
    } else {
        pm.globals.set("API_TOKEN", response.headers.all()[3].value)
    }
})