Proxy App for Chrome

Capturing HTTP requests
Proxy SwitchySharp - Chrome Web Store

If you are using APIs to build client-side applications - mobile apps, websites or desktop applications - you might want to see the actual HTTP request traffic that is being sent and received in the application. In some cases, you might discover APIs that are not even documented. Postman gives you tools to see and capture this network traffic easily. You can use the built-in proxy in the Postman native apps or use the Interceptor extension for the Postman Chrome app. Support for the Interceptor extension in the native apps is coming soon.

Using Postman’s proxy example

In this tutorial, we will use Postman’s proxy feature to inspect HTTP communication going out from your phone. To get started, make sure your computer and mobile are connected to the same local wireless network.

Step 1: Set up the proxy in Postman

Open the PROXY SETTINGS modal in the Postman app (MacOS) by clicking the icon in the header toolbar.

Keep a note of the port mentioned in the proxy settings. In this case, let’s keep it at the default port 5555. Set the target to “History”. This will cause all your requests to be captured and stored in the History sidebar panel.

Step 2: Note your computer’s IP address

On OS X, the computer’s IP address can be found in System Preferences > Network. The IP address of your system will be something like the example here 192.168.0.101.

Step 3: Configure HTTP proxy on your mobile device

Open the wireless settings of your mobile device and update the configuration of the wireless connection to use HTTP Proxy. Set the IP address with the IP you retrieved from your computer in the second step. Set the port with the port you established in Postman in Step 1.

Set the proxy IP address of your device (an iPhone in this example) to the IP address you obtained from your system and port 5555.

You are all set! Head over to the Postman app, and you will start seeing the network calls listed under the History tab of the sidebar. Open your device’s web browser or your application and you will start seeing HTTP traffic passing through the app or the browser.

Source: www.getpostman.com


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