How do I implement graceful shutdown for HTTP servers?

In Go, implementing a graceful shutdown for HTTP servers allows you to handle ongoing requests and clean up resources before the server stops accepting new requests. This is particularly useful for scenarios like deploying new versions of your application, performing maintenance, or managing server health. Below is an example of how to achieve a graceful shutdown using Go's `http.Server` and the context package.


        package main
        
        import (
            "context"
            "log"
            "net/http"
            "os"
            "os/signal"
            "time"
        )

        func main() {
            // Create a new HTTP server
            srv := &http.Server{
                Addr: ":8080",
                Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
                    w.Write([]byte("Hello, World!"))
                }),
            }

            // Create a channel to listen for OS interrupt signals
            stop := make(chan os.Signal, 1)
            signal.Notify(stop, os.Interrupt)

            // Start the server in a goroutine
            go func() {
                if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
                    log.Fatalf("ListenAndServe(): %v", err)
                }
            }()

            // Wait for an interrupt signal
            <-stop
            log.Println("Shutting down server...")

            // Create a context with a timeout for the shutdown
            ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
            defer cancel()

            // Shutdown the server gracefully
            if err := srv.Shutdown(ctx); err != nil {
                log.Fatalf("Server Shutdown Failed:%+v", err)
            }
            log.Println("Server exited gracefully")
        }

How do I implement graceful shutdown for HTTP servers?

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How do I implement graceful shutdown for HTTP servers?

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