golang NewRequest/gorequest实现http请求的示例代码

通过go语言实现http请求

http.Post

import (
 "net/http"
 "net/url"
)

data := url.Values{"start":{"100"}, "hobby":{"xxxx"}}
body := strings.NewReader(data.Encode())
resp, err := http.Post("127.0.0.1:9338", "application/x-www-form-urlencoded", body)

net/http包没有封装直接使用请求带header的get或者post方法，所以，要想请求中带header，只能使用NewRequest方法

http.NewRequest

客户端：

import (
 "net/http"
 "json"
 "ioutil"
www.cppcns.com)
type Student struct{
 id string
 name string
}

type StudentReq struct{
 id string
 name string
}
func main() {
 stu := Student{
  id:"2ed4tg5fe35fgty3yy6uh",
  name:"amber",
 }
 stu,err := json.Marshal(&stu)
 reader := bytes.NewReader(stu)
 request,err := http.NewRequest("POST", "http://192.168.1.12:8000/create", reader)
 request.Header.Set("Content-Type", "application/json")
 client:=&http.Client{}
 response,err := client.Do(request)
 defer response.Body.Close()
 body,err := ioutil.ReadAll(response.Body)
 fmt.Printf(string(body))
 
 var stuReq StudentReq
 err = json.UnMarshal(body, &stuReq)
 fmt.Println(json.MarshalIndent(stuReq))
}

解析：

• stu,err := json.Marshal(&stu)：将stu对象改为json格式
• reader := bytes.NewReader(stu)：所以将json改为byte格式，作为body传给http请求
• request,err := http.NewRequest(“POST”, “http://192.168.1.12:8000/create”, reader)：创建url
• response,err := client.Do(request)：客户端发起请求，接收返回值
• body,err := ioutil.ReadAll(response.Body)：读取body的值，类型是byte
• json.MarshalIndent(stuReq)：修改json为标准格式

注意（坑）：

1、header里的参数是Content-Type，不要写成ContentType
2、【go http: read on closed response body 】如果发送的请求是分为2个func写的，记住defer要在ioutil.ReadAll之后执行，否则报错

gorequest

这种方式适合在url里拼接参数使用param直接传递

"github.com/parnurzeal/gorequest"

func main() {
 resp, body, errs := gorequest.New().Post("http://127.0.0.1/create").Param("ip", "192.168.1.4").EndBytes()
  if errs != nil || resp.StatusCode >= 300 {
   log.Errorf("fail to call api with errors %v, %+v", errs, body)
  }
 var stuReq StudentReq
 err = json.UnMarshal(body, &stuReq)
 fmt.Println(json.MarshalIndent(stuReq))
}