AWS Signatures with pm.sendrequest

Ask the Experts and Postman Tips
1

If I am using pm.sendRequest, how do I go about generating an AWS Signature? I need to create some tests that involve polling an SQS queue to ensure certain messages are delivered. However, that means I need pm.sendRequest to make repeated calls to polls the SQS and delete the messages off. I’m not seeing a way to this.

2

Don’t use pm.sendRequest for this as you don’t want to compute the signature.

Just reuse a regular Postman request. You can use postman.setNextRequest to retry the same request.

3

That’s what I’ve done, it just seems kludgy. I am polling an SQS Queue and iterating the messages to make sure I receive what I expect. So I have to basically call the same request in a loop.

4

How would that be different with pm.sendRequest? You would still be polling, right?

5

I don’t have the risk of someone doing something as simple and seemingly innocuous as renaming a request breaking the whole loop because setNextRequest expects the request name and doesn’t even seem to fail if you specify an invalid name…

6

Use the requestId instead of the request name, if this is your concern.
You can get it from the pm.info object.

7

This is an old thread, but incase anybody finds it and has a similar need here is a solution that worked for me that got posted here

pm.sendRequest({
    url: "https://ssm.eu-central-1.amazonaws.com",
    method: "POST",
    header: {
        'Content-Type': 'application/x-amz-json-1.1',
        'X-Amz-Target': 'AmazonSSM.GetParameter'
    },
    auth: {
        type: "awsv4",
        "awsv4": {
            "accessKey": "$ACCESSKEY",
            "secretKey": "$SECRET",
            "region": "eu-central-1",
            "service": "ssm",
            "sessionToken": "$SESSION_TOKEN"
        }
    },
    body: .....
}, function (err, response) {
    ....
});