For an HTTP handler with no writes in its handler,


package main

import (
    "net/http"
    "log"
)

func main() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
    })
    log.Fatal(http.ListenAndServe(":8080", nil))
}

... we don't deal with HTTP/1.0 requests with "Connection: keep-alive" ideally.

If we set a Content-Length: 0 header here, we wouldn't have to close the connection:

$ telnet localhost 8080
Trying ::1...
Connected to localhost.
Escape character is '^]'.
GET / HTTP/1.0
Connetion: keep-alive

HTTP/1.0 200 OK
Connection: close
Date: Fri, 24 Aug 2012 19:53:36 GMT
Content-Type: text/plain; charset=utf-8

Connection closed by foreign host.



We do the right thing for HTTP/1.1 (sending a chunked response and closing the chunk
stream).