go工具方法-http

package http

import (
    "bytes"
    "encoding/json"
    "io/ioutil"
    "net/http"
    "time"
)
// 复制代码即可使用   
// 发送GET请求
// url： 请求地址
func Get(url string) (string, error) {

    client := &http.Client{}
    req, err := http.NewRequest("GET", url, nil)
    req.Header.Set("Accept", "*/*")
    req.Header.Set("Content-Type", "application/json")
    if err != nil {
        return "", err
    }

    resp, err := client.Do(req)
    if err != nil {
        return "", err
    }
    defer resp.Body.Close()
    result, err := ioutil.ReadAll(resp.Body)      
        if err != nil {
        return "",err
    }
    return string(result), nil
}

// 发送POST请求
// url：         请求地址
// data：        POST请求提交的数据
// contentType： 请求体格式，如：application/json
func Post(url string, data interface{}, contentType string) (string,error) {

    // 超时时间：5秒
    client := &http.Client{Timeout: 5 * time.Second}
    jsonStr, err := json.Marshal(data)
         if err != nil {
        return "",err
    }     
    resp, err := client.Post(url, contentType, bytes.NewBuffer(jsonStr))
    if err != nil {
        return "",err
    }
    defer resp.Body.Close()

    result, err := ioutil.ReadAll(resp.Body)
        if err != nil {
        return "",err
    }
    return string(result),nil
}

//测试方法post
var contentType="application/json"
func TestPost(t *testing.T) {
   url  := "http://127.0.0.1:8555"   
   bc_no := strconv.FormatInt(11941, 16)
   bc_no="0x"+bc_no
   params:=[]string{bc_no}
   body :=map[string]interface{}{
      "jsonrpc":"2.0",
      "method":"eth_getBlockTransactionCountByNumber",
      "params":params,
      "id":time.Now().Unix(),
   }
   data,err:=Post(url,body,contentType)
   if err !=nil {
      fmt.Printf("eth_getBlockTransactionCountByNumber err:%v",err)
      return
   }
   fmt.Println(string(data))

}