package utils 
import (
 "crypto/tls"
 "encoding/json"
 "errors"
 "fmt"
 "io/ioutil"
 "net/http"
 "net/url"
 "strings"
 "sync"
) 
var (
 GET_METHOD = "GET"
 POST_METHOD = "POST"
 SENDTYPE_FROM = "from"
 SENDTYPE_JSON = "json"
) 
type HttpSend struct {
 Link  string
 SendType string
 Header map[string]string
 Body  map[string]string
 sync.RWMutex
} 
func NewHttpSend(link string) *HttpSend {
 return &HttpSend{
  Link:  link,
  SendType: SENDTYPE_FROM,
 }
} 
func (h *HttpSend) SetBody(body map[string]string) {
 h.Lock()
 defer h.Unlock()
 h.Body = body
} 
func (h *HttpSend) SetHeader(header map[string]string) {
 h.Lock()
 defer h.Unlock()
 h.Header = header
} 
func (h *HttpSend) SetSendType(send_type string) {
 h.Lock()
 defer h.Unlock()
 h.SendType = send_type
} 
func (h *HttpSend) Get() ([]byte, error) {
 return h.send(GET_METHOD)
} 
func (h *HttpSend) Post() ([]byte, error) {
 return h.send(POST_METHOD)
} 
func GetUrlBuild(link string, data map[string]string) string {
 u, _ := url.Parse(link)
 q := u.Query()
 for k, v := range data {
  q.Set(k, v)
 }
 u.RawQuery = q.Encode()
 return u.String()
} 
func (h *HttpSend) send(method string) ([]byte, error) {
 var (
  req  *http.Request
  resp  *http.Response
  client http.Client
  send_data string
  err  error
 ) 
 if len(h.Body) > 0 {
  if strings.ToLower(h.SendType) == SENDTYPE_JSON {
   send_body, json_err := json.Marshal(h.Body)
   if json_err != nil {
    return nil, json_err
   }
   send_data = string(send_body)
  } else {
   send_body := http.Request{}
   send_body.ParseForm()
   for k, v := range h.Body {
    send_body.Form.Add(k, v)
   }
   send_data = send_body.Form.Encode()
  }
 } 
 //忽略https的證書
 client.Transport = &http.Transport{
  TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
 } 
 req, err = http.NewRequest(method, h.Link, strings.NewReader(send_data))
 if err != nil {
  return nil, err
 }
 defer req.Body.Close()
 
 //設(shè)置默認(rèn)header
 if len(h.Header) == 0 {
  //json
  if strings.ToLower(h.SendType) == SENDTYPE_JSON {
   h.Header = map[string]string{
    "Content-Type": "application/json; charset=utf-8",
   }
  } else { //form
   h.Header = map[string]string{
    "Content-Type": "application/x-www-form-urlencoded",
   }
  }
 } 
 for k, v := range h.Header {
  if strings.ToLower(k) == "host" {
   req.Host = v
  } else {
   req.Header.Add(k, v)
  }
 } 
 resp, err = client.Do(req)
 if err != nil {
  return nil, err
 }
 defer resp.Body.Close()
 
 if resp.StatusCode != http.StatusOK {
  return nil, errors.New(fmt.Sprintf("error http code :%d", resp.StatusCode))
 } 
 return ioutil.ReadAll(resp.Body)
}

package utils 
import (
 "testing"
) 
func Test_Get(t *testing.T) {
 h := NewHttpSend(GetUrlBuild("http://127.0.0.1/test.php", map[string]string{"name": "xiaochuan"}))
 _, err := h.Get()
 if err != nil {
 t.Error("請求錯(cuò)誤:", err)
 } else {
 t.Log("正常返回")
 }
} 
func Test_Post(t *testing.T) {
 h := NewHttpSend("http://127.0.0.1/test.php")
 h.SetBody(map[string]string{"name": "xiaochuan"})
 _, err := h.Post()
 if err != nil {
 t.Error("請求錯(cuò)誤:", err)
 } else {
 t.Log("正常返回")
 }
} 
func Test_Json(t *testing.T) {
 h := NewHttpSend("http://127.0.0.1/test.php")
 h.SetSendType("JSON")
 h.SetBody(map[string]string{"name": "xiaochuan"})
 _, err := h.Post()
 if err != nil {
 t.Error("請求錯(cuò)誤:", err)
 } else {
 t.Log("正常返回")
 }
} 
func Benchmark_GET(b *testing.B) {
 for i := 0; i < b.N; i++ {
 h := NewHttpSend(GetUrlBuild("http://127.0.0.1/test.php", map[string]string{"name": "xiaochuan"}))
 _, err := h.Get()
 if err != nil {
 b.Error("請求錯(cuò)誤:", err)
 } else {
 b.Log("正常返回")
 }
 }
}

//question ???將stdout重定向?yàn)閞esponse信息？？？
package main 
import (
 "fmt"
 "io"
 "net/http"
 "os"
) 
func main() {
 //生成client 參數(shù)為默認(rèn)
 client := &http.Client{} 
 //生成要訪問的url
 url := "http://www.baidu.com"  
 //提交請求
 reqest, err := http.NewRequest("GET", url, nil) 
 if err != nil {
 panic(err)
 } 
 //處理返回結(jié)果
 response, _ := client.Do(reqest) 
 //將結(jié)果定位到標(biāo)準(zhǔn)輸出 也可以直接打印出來 或者定位到其他地方進(jìn)行相應(yīng)的處理
 stdout := os.Stdout
 _, err = io.Copy(stdout, response.Body) 
 //返回的狀態(tài)碼
 status := response.StatusCode 
 fmt.Println(status) 
}

 Transport RoundTripper
 CheckRedirect func(req *Request, via []*Request) error
 Jar CookieJar
 Timeout time.Duration

pool := x509.NewCertPool()
 caCertPath := "certs/cert_server/ca.crt" 
 caCrt, err := ioutil.ReadFile(caCertPath)
 if err != nil {
 fmt.Println("ReadFile err:", err)
 return
 }
 pool.AppendCertsFromPEM(caCrt) 
 cliCrt, err := tls.LoadX509KeyPair("certs/cert_server/client.crt", "certs/cert_server/client.key")
 if err != nil {
 fmt.Println("Loadx509keypair err:", err)
 return
 } 
 tr := &http.Transport{
 TLSClientConfig: &tls.Config{
 RootCAs:  pool,
 Certificates: []tls.Certificate{cliCrt},
 },
 }
 client := &http.Client{Transport: tr}

// use map as struct
 var clusterinfo = url.Values{}
 //var clusterinfo = map[string]string{}
 clusterinfo.Add("userName", user)
 clusterinfo.Add("password", pw)
 clusterinfo.Add("cloudName", clustername)
 clusterinfo.Add("masterIp", masterip)
 clusterinfo.Add("cacrt", string(caCrt)) 
 data := clusterinfo.Encode() 
 url := "https://10.10.105.124:8443/user/checkAndUpdate"
 reqest, err := http.NewRequest("POST", url, strings.NewReader(data))