写了个go版本的阿里云发短信服务，短信能成功发送情况下，期待的是有有效信息的数据, 但返回的response 被decode后显示{{}}，想知道什么原因导致的？

希望在成功发送短信的情况下，json.NewDecoder 出来的数据是{{"RequestId":"","Code":"","Message":"","BizId":""}} 使用 ，但是返回的是{{}} ``` package aliyun import ( "errors" "encoding/json" "regexp" "net/url" "crypto/hmac" "crypto/sha1" "encoding/base64" "sort" "time" "strconv" "fmt" "net/http" "github.com/satori/go.uuid" ) type Sms struct { accessKeyId string accessSercret string dict map[string]string } // 网络请求返回的数据格式 type ( SmsResult struct { RequestId string `json:"RequestId"` Code string `json:"Code"` Message string `json:"Message"` BizId string `json:"BizId"` } SmsResponse struct { SendSmsResponse SmsResult `json:"SendSmsResponse"` } ) type para struct { key string value string } type paras []para func (c paras) Len() int { return len(c) } func (c paras) Swap(i, j int) { c[i], c[j] = c[j], c[i] } func (c paras) Less(i, j int) bool { return c[i].key < c[j].key } func New(accessKeyId string, accessSercret string) *Sms { return &Sms{ accessKeyId, accessSercret, map[string]string{ "OK": "请求成功", "isp.RAM_PERMISSION_DENY": "RAM权限DENY", "isv.OUT_OF_SERVICE": "业务停机", "isv.PRODUCT_UN_SUBSCRIPT": "未开通云通信产品的阿里云客户", "isv.PRODUCT_UNSUBSCRIBE": "产品未开通", "isv.ACCOUNT_NOT_EXISTS": "账户不存在", "isv.ACCOUNT_ABNORMAL": "账户异常", "isv.SMS_TEMPLATE_ILLEGAL": "短信模板不合法", "isv.SMS_SIGNATURE_ILLEGAL": "短信签名不合法", "isv.INVALID_PARAMETERS": "参数异常", "isp.SYSTEM_ERROR": "系统错误", "isv.MOBILE_NUMBER_ILLEGAL": "非法手机号", "isv.MOBILE_COUNT_OVER_LIMIT": "手机号码数量超过限制", "isv.TEMPLATE_MISSING_PARAMETERS": "模板缺少变量", "isv.BUSINESS_LIMIT_CONTROL": "业务限流", "isv.INVALID_JSON_PARAM": "JSON参数不合法，只接受字符串值", "isv.BLACK_KEY_CONTROL_LIMIT": "黑名单管控", "isv.PARAM_LENGTH_LIMIT": "参数超出长度限制", "isv.PARAM_NOT_SUPPORT_URL": "不支持URL", "isv.AMOUNT_NOT_ENOUGH": "账户余额不足", }, } } func trans(i int) string { if i < 10 { return "0" + strconv.Itoa(i) } return strconv.Itoa(i) } func (s *Sms) genRequestUrl ( phoneNumbers string ,signName string, templateParam string, templateCode string) string{ parasSlice := make(paras, 0) now := time.Now().UTC() timestamp := trans(now.Year()) + "-" + trans(int(now.Month())) + "-" + trans(now.Day()) + "T"+ trans(now.Hour()) + ":" + trans(now.Minute()) + ":" + trans(now.Second()) + "Z"; // 1. 系统参数 parasSlice = append(parasSlice,para{"SignatureMethod","HMAC-SHA1"}) parasSlice = append(parasSlice,para{"SignatureNonce",uuid.NewV4().String()}) parasSlice = append(parasSlice,para{"AccessKeyId",s.accessKeyId}) parasSlice = append(parasSlice,para{"SignatureVersion","1.0"}) parasSlice = append(parasSlice,para{ "Timestamp", timestamp, }) parasSlice = append(parasSlice,para{"Format","JSON"}) // 2. 业务API参数 parasSlice = append(parasSlice,para{"Action","SendSms"}) parasSlice = append(parasSlice,para{"Version","2017-05-25"}) parasSlice = append(parasSlice,para{"RegionId","cn-hangzhou"}) parasSlice = append(parasSlice,para{"PhoneNumbers",phoneNumbers}) parasSlice = append(parasSlice,para{"SignName",signName}) if templateParam != "" { parasSlice = append(parasSlice,para{"TemplateParam",templateParam}) } parasSlice = append(parasSlice,para{"TemplateCode",templateCode}) // 4. 参数KEY排序 sort.Sort(parasSlice) // 5. 构造待签名的字符串 var sortQueryStringTmp string for _, _para := range parasSlice { _key := specialUrlEncode(_para.key) _value := specialUrlEncode(_para.value) sortQueryStringTmp += "&" + _key + "=" + _value } reg := regexp.MustCompile(`^&`) sortedQueryString := reg.ReplaceAllString(sortQueryStringTmp, "") stringToSign := "GET&" stringToSign += specialUrlEncode("/") + "&" stringToSign += specialUrlEncode(sortedQueryString) sign := sign(s.accessSercret + "&", stringToSign) // 6. 签名最后也要做特殊URL编码 signature := specialUrlEncode(sign); return "http://dysmsapi.aliyuncs.com/?Signature=" + signature + sortQueryStringTmp } func sign(accessSercret string, stringToSign string) string { key := []byte(accessSercret) h := hmac.New(sha1.New, key) h.Write([]byte(stringToSign)) return base64.StdEncoding.EncodeToString(h.Sum(nil)) } func specialUrlEncode(value string) string { value = url.QueryEscape(value) reg := regexp.MustCompile(`\+`) value = reg.ReplaceAllString(value,"%20") reg = regexp.MustCompile(`\*`) value = reg.ReplaceAllString(value,"%2A") reg = regexp.MustCompile(`%7E`) value = reg.ReplaceAllString(value,"-") reg = regexp.MustCompile(`=$`) value = reg.ReplaceAllString(value,"") return value } func (s *Sms) Send(phoneNumbers string ,signName string, templateParam map[string]interface{}, templateCode string) (SmsResult, error) { templateParamString, terr := json.MarshalIndent(templateParam, "", " ") if terr != nil { return SmsResult{}, terr } uri := s.genRequestUrl(phoneNumbers,signName,string(templateParamString),templateCode); resp, err := http.Get(uri) if err != nil { return SmsResult{}, err } defer resp.Body.Close() var sr SmsResponse var sresult SmsResult err = json.NewDecoder(resp.Body).Decode(&sr) if err != nil { return SmsResult{}, err } sresult = sr.SendSmsResponse // 短信发送成功情况下，这里打印出来的是{{}} fmt.Println(sr) if sresult.Code == "OK" { return sresult, nil }else if _, exists := s.dict[sresult.Code]; exists { return SmsResult{}, errors.New(s.dict[sresult.Code]) }else { return SmsResult{}, errors.New("unknown error") } } ``` ``` package main import ( "mytimer/aliyun" "fmt" ) func main() { sms := aliyun.New("accessKeyId", "accessSercret") res, err := sms.Send("phoneNumbers","signName",map[string]interface{}{"code":"111111"},"templateCode") if err != nil { fmt.Println(err) }else { fmt.Println(res) } } ``` 此外，刚学golang，有空的朋友麻烦对这段代码给些建议