http11fullduplexexperiment.go

package main

import (
	"fmt"
	"io"
	"net/http"
	"net/url"
	"time"
)

func main() {
	go func() {
		http.ListenAndServe(":8080", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
			go func() {
				for {
					buf := make([]byte, 10)
					if _, err := r.Body.Read(buf); err != nil {
						panic(err)
					}
					fmt.Println("reading", string(buf))
				}
			}()

			rc := http.NewResponseController(w)
			for {
				str := fmt.Sprintf("ping %d", time.Now().UnixNano())
				if _, err := w.Write([]byte(str)); err != nil {
					panic(err)
				}

				if err := rc.Flush(); err != nil {
					panic(err)
				}

				fmt.Println("start sleep")
				time.Sleep(5000 * time.Millisecond)
				fmt.Println("end sleep")
			}
		}))
	}()

	reader, writer := io.Pipe()
	go func() {
		for {
			_, err := writer.Write([]byte("request"))
			if err != nil {
				panic(err)
			}
			time.Sleep(1000 * time.Millisecond)
		}
	}()

	u, _ := url.Parse("http://localhost:8080")
	req := &http.Request{
		Method:           "POST",
		ProtoMajor:       1,
		ProtoMinor:       1,
		URL:              u,
		TransferEncoding: []string{"chunked"},
		Body:             reader,
		Header: 		  make(map[string][]string),
	}
	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	for {
		buf := make([]byte, 40)
		if _, err := res.Body.Read(buf); err != nil {
			panic(err)
		}
		fmt.Println(string(buf))
	}
}