How can I build a custom request workflow in Postman, based on the last request's response? - postman

Question

I have a request that needs some time to be processed in Logic Apps, so I established an async pattern. Then, in the response (a 202 status type) there is a "location" header value that has a URL value like the following:
https://example.com/checkJobId/218764
The server returns a response with the "location" and "retry-after" header values, and I want Postman to go into that location with the same credentials until it comes back with a 200 response. Is there a way to do this?
I checked in the documentation that you can chain different requests by name or ID; maybe the only solution is to separate the Job ID as a "job-id" value at the response's header and pass it to a new request under my collections in Postman, but I want to know if I can do it directly without having to change my server's response.

Answer 1

Done. This is my tested and working postman code:
// VARIABLES
var jobUrl = "https://example.com/api/async-task";
var retries = 5;
var delayInSecondsBetweenRetries = 20;
// Send initial request and get response
pm.sendRequest({
url: jobUrl,
method: "POST",
header: {
"APIKey": "MYAPIKEY"
},
}, function(err, res) {
var location = res.headers.get("location");
console.log("Job started. Checking status at: " + location);
// If status code 202 is received, get the "location" header URL
if (res.status == "Accepted") {
console.log("Entering in retry loop");
// Start retry loop
for (var i = 0; i < retries; i++) {
(function(i) {
var delay = delayInSecondsBetweenRetries * 1000 * i;
var friendlyStatus = "Still Working";
setTimeout(function() {
// Send request to "location" header URL and get response
pm.sendRequest({
url: location,
method: "GET",
header: {
"APIKey": "MYAPIKEY"
},
}, function(err, res) {
if (res.status == "Accepted") {
friendlyStatus = "Still Working";
} else if (res.status == "Bad Request") {
friendlyStatus = "Job ID not found or some error happened in the server!";
} else if (res.status == "OK") {
friendlyStatus = "||||||| Job Done! ||||||||";
} else {
throw new Error("An unknown response was recieved. Check the console for details.");
}
console.log("Location checked. Response: " + friendlyStatus);
// If status code 200 is received, exit loop
if (res.status == "OK") {
var response = res.json();
console.log("Response: " + response.ResponseText + "\n" + "Full Response Data: " + response.FullResponseData);
}
// If status code is not 200, wait 10 seconds and retry
else if (res.status == "Accepted") {
var messageComplement = "Retrying in " + delayInSecondsBetweenRetries + " seconds";
if (i == 9) {
messageComplement = "Achieved retries limit. No more retries.";
}
console.log(messageComplement);
}
else if (res.status == "Accepted") {
var messageComplement = "Retrying in " + delayInSecondsBetweenRetries + " seconds";
if (i == 9) {
messageComplement = "Achieved retries limit. No more retries.";
}
console.log(messageComplement);
}
});
}, delay);
})(i)
}
}
});