Postman retry the token if expired Pre-request script

Readme.md

Postman get token if expired

This is a way to before every request check if the auth token is expired and retrieve a new one, update the variable if needed

pre-request.js

const appUserId = pm.environment.get("appuserid");
const manufacturerId = pm.environment.get("manufacturerid");
const appId = pm.environment.get("appid");
const tokenUrl = pm.environment.get("token_url");
let expiresInTime = pm.environment.get("expires_in");

if (!expiresInTime) {
  const defaultExpirationTime = 86400;
  console.log(
    `Setting token expiration time to default: ${defaultExpirationTime} `
  );
  expiresInTime = defaultExpirationTime; //Set expire time to default
}
console.log(new Date().getTime());

const authRequest = {
  url: tokenUrl,
  method: "GET",
  header: {
    Accept: "application/json",
    "Content-Type": "application/json",
    "x-appuserid": appUserId,
    "x-manufacturerid": manufacturerId,
    "x-appid": appId,
  },
};

if (expiresInTime <= new Date().getTime()) {
  console.log("Token is expired");
  pm.sendRequest(authRequest, (error, response) => {
    const responseJson = response.json();

    console.log(error ? error : responseJson);

    pm.environment.set("token", responseJson.access_token);

    if (responseJson.expires_in) {
      var expiryDate = new Date();
      expiryDate.setSeconds(expiryDate.getSeconds() + responseJson.expires_in);
      pm.environment.set("expires_in", expiryDate.getTime());
    }
  });
} else {
  console.log("Token expire date is OK");
}