What are Custom Handlers?
Custom handlers allow you to intercept and handle requests and responses in your Azure Functions. They provide a flexible way to integrate external libraries, perform transformations, and add custom behavior to your functions. They are often used for:
- Processing request headers and body
- Modifying request and response data
- Integrating with external services
- Adding custom authentication and authorization
How to Implement Custom Handlers
You can implement custom handlers in several ways:
- HTTP Handlers: For handling HTTP requests and responses directly.
- Service Bus Handlers: For handling messages in Service Bus queues.
- Event Grid Handlers: For processing events from Event Grid.
Code Samples
HTTP Handler Example
// Example C# code for an HTTP handler
using Microsoft.AspNetCore.Http;
public class MyHttpHandler : IHttpHandler
{
public void Process(HttpContext context)
{
// Your custom logic here
context.Response.WriteLine("Hello from a custom handler!");
}
}