Is the standard library net/http sufficient for writing a production web server in pure Go without frameworks?

Yes, the standard net/http library in Go is quite suitable for writing production web servers without using third-party frameworks. It provides all the basic features:

• Handling HTTP requests and routing via http.ServeMux.
• Support for middleware through handler wrappers.
• Working with headers, cookies, forms, and JSON.
• Built-in HTTP/2.

Example of a simple server:

package main

import (
    "fmt"
    "net/http"
)

func helloHandler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintln(w, "Hello, world!")
}

func main() {
    http.HandleFunc("/", helloHandler)
    http.ListenAndServe(":8080", nil)
}

For complex tasks (e.g., advanced routing, authentication, sessions), you can write your own components or use small libraries, but the basic functionality of net/http is quite sufficient for many production scenarios.