How to use a postman script to simplify your API verification process

Postman is a platform used for developers, API testers, technical authors and DOPs for testing, documents and cooperation on the development of API. It provides user -friendly interfaces to create a variety of API applications (HTTP, Ghargql, GRPC), reaction inspection, and collecting API calls for mutual support and automation (HTTP, GHARGQL, GRPC).

Working frequently during the APIS test is waste and waste time. For example, the process of recovering, copying, and pasteting the new verification tokens used in the postman is repeated. You can simplify this process by using the author’s script so that the author can store the token and then reuse them without repeating the copy and paste steps.

To practice with this guide you should be:

• Postman API Client Installed on your computer

• Experience in requesting API with postman

• A back and application that uses JWT verification and keeps its documents in your postman client

If you don’t have a back & application setup, I created a one that you can clone from Gut Hub Orimidominic/Frecodecamp Postman-AP-JWT.

By the end of this article, you should be able to facilitate the acquisition and reuse of the verification token in your API applications. You should also have a practical understanding of some scripts essential scripts used in other areas of software testing with postman.

The table of content

What are the postman scripts?

Postman scripts JavaScript code has blocks that you can write and run inside the postman API client to automatically and enhance the API testing workflow. You can use postman scripts to add code before and after API requests. These scripts can be used:

• Add logic and process data from API requests

• Write test claims for API’s response

• Run automatic tests on API closing points

You can find the postman script Scripts API application tab. Code written in the code Pre -application The tab runs before applying and the code written in the code After the reaction After answering the tab runs.

How to simplify your JWT verification process

Summary that, you will take the following steps to achieve the goal of this tutorial:

1. Confirm to get token

2. Save the token in the collection variable with postman scripts

3. Use variables in an API application

Confirm to get token

To start, take the following steps:

1. Start your backing application and make sure it is running successfully.

2. Open your postman application and go to the API request to sign in to get JWT.

3. Apply API to sign the closing point and take note of the JSON response scheme.

The JSON response in the above mentioned section of the image has been shown in the request with a successful mark. In the Response Scheme, the authored autobiography used for permission is in the token data.token Field you will use postman scripts to store this token in variable and then use the variable in it Authorization A header of applications that require permission.

How to save the token in the variable with the postman script

In the postman, click on Scripts Forward tab Body Tab. If the postman application window is small, you may need to click on the dropdown to see it. Next, click on After the reaction Tab. In the text area on the right, you will write the script so that the answer is to get the author and store it in the postman variable. Copy the JavaScript code below and paste it into the text area.

if (pm.response.code == 200) {
    const token = pm.response.json().data.token
    pm.collectionVariables.set("auth_token", token)
}

Postman use scripts pm Identity To access and edit information in the postman environment. Uses the aforementioned script pm First to ensure that the application was successful by checking the application whether the response is the status code or not 200.

Within the conditional statement, pm.response.json().data.token JSON is used to get a verification token from the reaction and to store it in a combination variable that says auth_token. Unless auth_token Does not exist before, it has been created and set at the price of cost token. If it already exists, the price has been changed.

To confirm this auth_token Has been set, click on the combination name (labeled 1 in the top screenshot) and then click on Variable The tab (the top screenshot has 2 labeled). Next, repeatedly copying the token and paste it Authorization Your requests header, you’ll use auth_token I Authorization Header of your requests.

How to use variables in an application

Refer to the submission variable Authorization Header with a double curly curvy midst of dual {{auth_token}}. When you request API, the value quoted by the postman will be used {{auth_token}} As if Authorization Header

If another validation application costs the value auth_token Being updated, you no longer have to copy a new Auth token. Will update the script in the post -post tab auth_token Appreciate and you can move forward with API applications easily. Do not need to copy and paste repeatedly – Repeat yourself (dry).

Next steps

In this tutorial, you have learned how to use postman scripts to configure environmental variables in the postman. You have also learned how to repeatedly copy for use in API requests and eliminate the process of paste the Auth token.

Leaders about writing a claim test for your APIS, check, check Test API’s functionality and performance in postman Guide by postman.