HTTP Headers Features: Feature-Policy

Hello! In this article, we want to discuss one of the new and fascinating features in the world of web, namely Feature-Policy. This feature allows you, as a developer, to control and manage different capabilities and attributes of browsers. This allows you to limit the behavior of different websites, such as location, internet connection, and even restrict or enable JavaScript execution.

Imagine having a web application designed to provide user information through location services; however, you want this access to be restricted only to certain special functionalities. This means that Feature-Policy gives you control! By using this tool, you can specifically indicate that, for example, only your own website is allowed to use the user's camera or microphone.

One of the advantages of using this feature is enhancing user security. This means that you can ensure that only specific resources and special functionalities can be accessed, which in turn helps users feel more secure about their private data. However, you should note that even though this feature can control many special functionalities, it cannot replace comprehensive security mechanisms for websites.

Now that we understand the importance and functionality of Feature-Policy, let's go through an example of this feature to better understand how it works. In this brief example, you will see how you can restrict access to the microphone and camera on different site pages.

Example of Feature-Policy

 <!-- Adding restricted access features for the overall site level -->
 <meta http-equiv="Feature-Policy" content="camera 'self'; microphone 'none'">
 

Code Explanation