golang 阿里云发送短信 和 HMAC 加密

写的比较粗糙，有错误的地方希望指正，不会英语，部分变量用拼音命名，打扰了

package sendmsg

import (
    "bytes"
    "crypto/hmac"
    "crypto/sha1"
    "encoding/base64"
    "encoding/json"
    "fmt"
    "io/ioutil"
    "net/http"
    "net/url"
    "strconv"
    "strings"
    "time"
)

const (
    ak          = "xxxxxxx"
    sk          = "xxxxxxx"
    requestURL  = "http://dysmsapi.aliyuncs.com/?Signature="
    actionStr   = "&Action=SendSms&Format=JSON&OutId=123"
    dateStr     = "&Version=2017-05-25"
    msgTemplete = "&SignatureVersion=1.0&TemplateCode=模板ID&TemplateParam="
    singStr     = "&SignatureMethod=HMAC-SHA1&SignatureNonce="
    singName    = "&RegionId=cn-hangzhou&SignName="
    lianJIe     = "&"
    signLinaJie = "GET&%2F&"
)

//SimpleMessage ...
type SimpleMessage struct {
    Message string `json:"Message"`
    Code    string `json:"Code"`
}

//MessageContent ...
type MessageContent struct {
    Code string `json:"code"`
}

//SendMsg 发送短信
func SendMsg(phone, msgJSON string) bool {
    
    body := "send msg"
    content := url.QueryEscape(msgJSON)
    signString := setQueryStr(phone, content, “skw493jei3j34ij34i”)
    singstr := signLinaJie + url.QueryEscape(signString)
    sign := hmac4Go(singstr, sk+lianJIe)
    client := &http.Client{}
    var req *http.Request
    req, err = http.NewRequest("GET", requestURL+url.QueryEscape(sign)+lianJIe+signString, strings.NewReader(body))
    var resp *http.Response
    resp, err = client.Do(req)
    if err != nil {
        fmt.Println("http get error.", err)
        return false
    }
    fmt.Println(resp.Body)
    defer resp.Body.Close()
    var bodys []byte
    bodys, err = ioutil.ReadAll(resp.Body)
    if err != nil {
        fmt.Println("http  readAll body error ", err)
        return false
    }
    fmt.Println(string(bodys))
    var msg SimpleMessage
    if len(bodys) > 0 {
        err = json.Unmarshal(bodys, &msg)
        if err != nil {
            fmt.Println("http  json body error ", err)
            return false
        }
        fmt.Println(msg)
    }
    if msg.Code == "OK" {
        return true
    }
    return false
}

//setQueryStr 设置查询请求
func setQueryStr(phone, content string, id int64) string {
    var cstZone = time.FixedZone("GMT", 0)
    keyTime := time.Now().In(cstZone).Format("2006-01-02T15:04:05Z")
    singNameS := url.QueryEscape("SignName")
    buf := bytes.Buffer{}
    buf.WriteString("AccessKeyId=")
    buf.WriteString(ak)
    buf.WriteString(actionStr)
    buf.WriteString("&PhoneNumbers=")
    buf.WriteString(phone + singName + singNameS + singStr)
    buf.WriteString(strconv.FormatInt(id, 10) + msgTemplete + content)
    buf.WriteString("&Timestamp=" + url.QueryEscape(keyTime) + dateStr)
    signString := buf.String()
    return signString
}

//hmac4Go 加密
func hmac4Go(name, sk string) string {
    mac := hmac.New(sha1.New, []byte(sk))
    mac.Write([]byte(name))
    encodeString := base64.StdEncoding.EncodeToString(mac.Sum(nil))
    return encodeString
}