Test Azure Front Door Origins for Valid HTTP Range-Request Behavior: A Comprehensive Guide

How to Test Azure Front Door Origins for Valid HTTP Range-Request Behavior
Introduction
Azure Front Door (AFD) is an advanced web application delivery and acceleration platform. It is designed to ensure maximum performance and availability of websites, applications and APIs hosted on Microsoft Azure. AFD makes it easy to set up global HTTP-based applications and services, with built-in support for configurable rules and policies to define routing behavior. In addition to routing and acceleration, AFD also provides the ability to set up and configure origin validation. This allows for the validation of origin servers for requests from the AFD edge before the requests are forwarded to the origin.

In this article, we will discuss how to test the AFD origin validation for valid HTTP range-request behavior. We will look at the different types of origin validation and how to properly configure them for range-request validation. We will also provide some tips and best practices for setting up and testing origin validation for AFD.

Types of Origin Validation
When setting up origin validation for AFD, there are three types of validation that can be used:

* HTTP Validation
* HTTPS Validation
* Request Timeout Validation

HTTP Validation is the most common type of origin validation and is used to validate that the origin is reachable via HTTP. HTTPS Validation is used to validate that the origin is reachable via HTTPS. Finally, Request Timeout Validation is used to validate that the origin is reachable within a set amount of time. All three types of origin validation can be used together to ensure the highest level of availability for your AFD applications.

Configuring Origin Validation for Range-Request Validation
In order to ensure that origin validation is working properly for range-request validation, it is important to properly configure the origin validation settings. This includes configuring the origin validation timeout, the origin validation path, and the origin validation status code. The origin validation timeout is the amount of time that the AFD edge will wait for a response from the origin before considering the request failed. The origin validation path is the URL path that the AFD edge will use to send the validation request. Finally, the origin validation status code is the HTTP status code that the AFD edge will expect to receive in order to consider the request successful.

Testing Origin Validation for Range-Request Validation
Once the origin validation settings have been properly configured, it is important to test that origin validation is working properly for range-request validation. This can be done by using a tool such as Fiddler or Postman to send a range-request to the AFD edge. If the AFD edge is properly configured, it should return a response with a status code of 206 (Partial Content). If the status code is not 206, this indicates that the origin validation is not working properly.

Best Practices for Setting Up and Testing Origin Validation
When setting up and testing origin validation, it is important to follow best practices. This includes setting the origin validation timeout to an appropriate value, ensuring that the origin validation path is properly configured, and testing the origin validation for range-request validation. Additionally, it is important to ensure that the origin is reachable from the AFD edge and to monitor the performance of the origin validation to ensure that it is working properly.

Conclusion
Azure Front Door is an advanced web application delivery and acceleration platform that provides the ability to set up and configure origin validation. In this article, we discussed how to test the AFD origin validation for valid HTTP range-request behavior. We looked at the different types of origin validation and how to properly configure them for range-request validation. We also provided some tips and best practices for setting up and testing origin validation for AFD. By following these best practices, you can ensure that origin validation is working properly for range-request validation and ensure the highest level of availability for your AFD applications.
References:
How to test Azure Front Door origins for valid HTTP range-request behavior
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1. Azure Front Door
2. HTTP Range Requests
3. Testing Azure