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Routing

The Go standard library has a lot of powerful HTTP features and, as of version 1.22, comes equipped with method-based pattern matching for routing.

In this lesson, we are going to limit which endpoints are available via which HTTP methods. In our current implementation, we can use any HTTP method to access any endpoint. This is not ideal.

There are powerful routing libraries like Gorilla Mux and Chi, however, the course will assume you are using Go's standard library. Just know that it isn't your only option!

Try It

Run this command to send an empty POST request to your running server:

curl -X POST http://localhost:8080/healthz

You should get an OK response - but we want this endpoint to only be available via GET requests!

Method Specific Routing

Using the Go standard library, you can specify a method like this: [METHOD ][HOST]/[PATH]. For example:

mux.HandleFunc("POST /articles", handlerArticlesCreate)
mux.HandleFunc("DELETE /articles", handlerArticlesDelete)

Assignment

Update the following paths to only accept GET requests:
- /healthz
- /metrics
When a request is made to one of these endpoints with a method other than GET, the server should return a 405 (Method Not Allowed) response (this is handled automatically!).
Update the /reset endpoint to only accept POST requests.

Run and submit the CLI tests.