DumpRequest in Go

Posted by GoDoc
Public (Editable by Users)

DumpRequest returns the given request in its HTTP/1.x wire representation. It should only be used by servers to debug client requests. The returned representation is an approximation only; some details of the initial request are lost while parsing it into an http.Request. In particular, the order and case of header field names are lost. The order of values in multi-valued headers is kept intact. HTTP/2 requests are dumped in HTTP/1.x form, not in their original binary representations.

Go
Edit 
package main

import (
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
	"net/http/httptest"
	"net/http/httputil"
	"strings"
)

func main() {
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		dump, err := httputil.DumpRequest(r, true)
		if err != nil {
			http.Error(w, fmt.Sprint(err), http.StatusInternalServerError)
			return
		}

		fmt.Fprintf(w, "%q", dump)
	}))
	defer ts.Close()

	const body = "Go is a general-purpose language designed with systems programming in mind."
	req, err := http.NewRequest("POST", ts.URL, strings.NewReader(body))
	if err != nil {
		log.Fatal(err)
	}
	req.Host = "www.example.org"
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		log.Fatal(err)
	}
	defer resp.Body.Close()

	b, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		log.Fatal(err)
	}

	fmt.Printf("%s", b)
}