// Copyright 2015 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License. 
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
// See the License for the specific language governing permissions and
// limitations under the License. 

package client

import (
	"bytes"
	"fmt"
	"io/ioutil"
	"net/http"
	"os"
)

var (
	cURLDebug = false
)

func EnablecURLDebug() {
	cURLDebug = true
}

func DisablecURLDebug() {
	cURLDebug = false
}

// printcURL prints the cURL equivalent request to stderr. 
// It returns an error if the body of the request cannot
// be read. 
// The caller MUST cancel the request if there is an error. 
func printcURL(req *http. Request) error {
	if ! cURLDebug {
		return nil
	}
	var (
		command string
		b       []byte
		err     error
	)

	if req. URL ! = nil {
		command = fmt. Sprintf("curl -X %s %s", req. Method, req. URL.String())
	}

	if req. Body ! = nil {
		b, err = ioutil. ReadAll(req. Body)
		if err ! = nil {
			return err
		}
		command += fmt. Sprintf(" -d %q", string(b))
	}

	fmt. Fprintf(os. Stderr, "cURL Command: %s\n", command)

	// reset body
	body := bytes. NewBuffer(b)
	req. Body = ioutil. NopCloser(body)

	return nil
}
