Add header to every request in Postman in pre-request script

debugcn 投稿 Dev

Navalona Ramanantoanina

I want to automatically add a header to every request in my whole collection using this pre-request script:

pm.request.headers.add({
    'key': "myvar",
    'value': pm.environment.get("myvar")    
});

myvar is an environment variable.

Unfortunately, it doesn't work. Did I miss something?

dsicari

For those who are trying it on postman ~ 7.10.0, you can add headers programmatically in a pre-request script, into the request or into the collection (into collection will add headers to all requests inside collection).

pm.request.headers.add({ 
    // These keys appears when you set a header by hand. Just for fun they are here
    disabled: false,
    description:{
        content: "DescriptionTest",
        type: "text/plain"
    },
    // Your header, effectively
    key: 'KeyTest', 
    name: 'NameTest', 
    // If you set a variable you can access it
    // HeaderTest here has value="ValueHeaderTest"
    value: pm.collectionVariables.get("HeaderTest")
});

The code snippet generator will not show the added header:

GET /get_info.php HTTP/1.1
Host: 192.168.15.25:8001
Content-type: application/json
User-Agent: PostmanRuntime/7.19.0
Accept: */*
Host: 192.168.15.25:8001
Accept-Encoding: gzip, deflate
Connection: keep-alive

But the Postman Console will:

GET /get_info.php HTTP/1.1
Content-type: application/json
KeyTest: ValueHeaderTest
User-Agent: PostmanRuntime/7.19.0
Accept: */*
Host: 192.168.15.25:8001
Accept-Encoding: gzip, deflate
Connection: keep-alive

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