How Can I Detect When a Go net/http Server Starts Listening?

Can You Detect When an HTTP Server Starts Listening?

When utilizing the net/http server interface, it can be challenging to detect when the HTTP server initiates listening. The ListenAndServe function does not provide a mechanism for notification upon the server's readiness.

Alternative Solution

Instead of relying on a built-in notification feature, you can manually handle the process by writing the code directly into your application. This allows you to signal when the listening socket becomes available:

l, err := net.Listen("tcp", ":8080")
if err != nil {
    // Handle error
}

// Signal that the server is open for business, such as printing a message or setting a variable
if err := http.Serve(l, rootHandler); err != nil {
    // Handle error
}

By manually signaling the socket's open status, you can detect the server's readiness without relying on a sleep mechanism, which risks inaccurate timing. Furthermore, if the signaling step does not block, HTTP.Serve can seamlessly handle any backlog on the listening socket.

The above is the detailed content of How Can I Detect When a Go net/http Server Starts Listening?. For more information, please follow other related articles on the PHP Chinese website!