HTTP Server in Go

Go: HTTP Server

Go provides a simple way to create HTTP servers using the net/http package. Here's an example of how to create a simple HTTP server that responds with a "Hello, World!" message:

    package main

    import (
        "fmt"
        "net/http"
    )

    func main() {
        http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
            fmt.Fprintf(w, "Hello, World!")
        })

        http.ListenAndServe(":8080", nil)
    }

This code creates an HTTP server that listens on port 8080. When a request is received, the server calls the provided handler function, which writes the "Hello, World!" message to the response.

How to create a server with a custom handler and a logger middleware in Go?

You can also create more complex servers by adding additional handlers and middleware functions.

Here's an example of how to create a server with a custom handler and a logger middleware:-

    package main

    import (
        "fmt"
        "log"
        "net/http"
    )

    func main() {
        http.HandleFunc("/", myHandler)

        logger := log.New(os.Stdout, "my-server: ", log.LstdFlags)
        http.ListenAndServe(":8080", logMiddleware(logger, nil))
    }

    func myHandler(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintf(w, "Hello, World!")
    }

    func logMiddleware(logger *log.Logger, next http.Handler) http.Handler {
        return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
            logger.Printf("Received %s request from %s", r.Method, r.RemoteAddr)
            next.ServeHTTP(w, r)
        })
    }

This code defines a custom handler function (myHandler) and a middleware function (logMiddleware) that logs incoming requests before passing them on to the next handler. The server is created by calling ListenAndServe with the logger middleware added to the default http.Handler chain.

I hope that helps you get started with creating HTTP servers in Go! Let me know if you have any more questions.