Learning about the http lib from next.tech

goserver.go

package main

import (
  "fmt"
  "io/ioutil"
  "net/http"
  "net/url"
  "strings"
)

type StringServer string

func (s StringServer) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
  req.ParseForm()
  fmt.Printf("Received form data: %v\n", req.Form)
  fmt.Printf("Received header: %v\n", req.Header)
  rw.Write([]byte(string(s)))
}

func createServer(addr string) http.Server {
  return http.Server{
    Addr:    addr,
    Handler: StringServer("Hello world"),
  }
}

const addr = "localhost:7070"

func main() {
  s := createServer(addr)
  go s.ListenAndServe()

  form := url.Values{}
  form.Set("id", "5")
  form.Set("name", "Wolfgang")

  req, err := http.NewRequest(http.MethodPost,
    "http://localhost:7070",
    strings.NewReader(form.Encode()))

  if err != nil {
    panic(err)
  }
  req.Header.Set("Content-Type",
    "application/x-www-form-urlencoded")

  res, err := http.DefaultClient.Do(req)
  if err != nil {
    panic(err)
  }
  data, err := ioutil.ReadAll(res.Body)
  if err != nil {
    panic(err)
  }
  res.Body.Close()
  fmt.Println("Response from server:" + string(data))

}