~/Go HTTP Server Implementation from Scratch

Jan 15, 2019

To build a basic HTTP server from scratch in Go, use the standard library net/http. This package lets you quickly set up a server, handle routes, and serve responses.

Minimal Go HTTP server:

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package main

import (
  "fmt"
  "net/http"
)

func handler(w http.ResponseWriter, r *http.Request) {
  fmt.Fprintf(w, "Hello, world")
}

func main() {
  http.HandleFunc("/", handler)
  err := http.ListenAndServe(":8080", nil)
  if err != nil {
    panic(err)
  }
}

How it works:

• Import net/http
• Define a handler function that takes a ResponseWriter and a Request
• Use http.HandleFunc to bind URL paths to handlers
• Start the server with http.ListenAndServe

Run the program, then navigate to http://localhost:8080/ to see the response.

For production, consider using context, logging, and graceful shutdown techniques. See the Go documentation for advanced usage.