To decode this GET request, open chrome dev tools and go to the network tab: But how does this happen? What does Postman do behind the scenes?ĭecoding the GET Request sent with Postman Web Postman displays the response from the API, and it's the same response that we defined. Let's use the Mock API endpoint we just created in Postman Web and hit the "Send" button after setting the request type to "GET": ![]() However, since the requirement here is only to inspect network traffic and not modify it, we will use Chrome dev tools, so let's move ahead with that. You can further filter the traffic based on a specific domain and modify network traffic from Postman web using Requestly. Here's how you can launch a new Chrome instance from the Requestly Desktop app:Īnd then, you can inspect all the network traffic on that chrome instance: ![]() However, to inspect traffic from Postman web, we can launch a new Chrome instance and get all the traffic. We can use the System-wide proxy option available in the Connected source to inspect traffic from the Postman desktop app. Requestly Desktop App offers Inspecting & Modifying network traffic from browsers, mobile apps, desktop apps, Node servers & Terminal. Interestingly, you can also inspect network traffic with Requestly to analyze HTTP requests. But that's not all you can do with Requestly. Great! We managed to spin up a mock API server with Requestly in minutes. Then, Requestly should generate a mock API endpoint for you under the URL section that you can now use with Postman: After that, click on the "Create" button at the top right corner. Let's choose the method as GET, Endpoint as Postman_GET (you can put this literally whatever you want), and have a simple sample response in the body. ![]() That should open a simple form where you can specify API and mock server details. Once installed, head to Requestly's Mock Server and click Create new mock API. We'll then inspect the network tab in the chrome dev tools to determine how Postman communicates with the API endpoint we test.įirst, let's quickly set up a mock server with Requestly - an open-source browser extension that fast-tracks your web debugging process. We'll work with two simple requests today - a GET request and a POST request. If you've ever used Postman before, this should appear familiar. We'll then analyze the behavior of Postman using the network tab of our browser's DevTools, allowing us to deconstruct the application's operations. We'll use Requestly Mock Server to create a couple of dummy API endpoints to do this. We will delve into the inner workings of Postman's web application and explore what transpires when you use it to test your HTTP requests. In this article, we will learn how Postman Web works and HoppScotch indeed works very similarly. ![]() However, after the success of the HoppScotchOpen Source Web-based Rest API client, Postman also launched their web-based API client.īut have you ever contemplated how Postman operates behind the scenes? Fortunately, debugging web applications today is a breeze, as the comprehensive Chrome DevTools enable you to deconstruct any application on the web. It started with a Chrome extension, which was later deprecated, so they moved into the desktop app. Postman is an exceptionally well-regarded REST API client that developers rely on to construct and evaluate their APIs.
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