1.为什么要统一错误处理
统一错误处理的目的是为了前端开发接收到后端的statuscode,之后便于前端逻辑上开发，以及开发。200代表成功，500失败，400代表找不到、禁止等异常
2.后端封装统一接口
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/*** 统一处理* 错误码，response，返回内容，error*/func HandleResult(statusCode int, response *restful.Response, value interface{}, err error) {if err != nil {HandleAllStatus(parseValue(err, statusCode), response, err)return}if statusCode == http.StatusOK {HandleSuccess(response, value)return}// 解析其他错误HandleAllStatus(parseValue(value, statusCode), response, value)} |
3.核心函数
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func handle(statusCode int, response *restful.Response, req *restful.Request, err error) {_, fn, line, _ := runtime.Caller(2)klog.Errorf("%s:%d %v", fn, line, err)http.Error(response, sanitizer.Replace(err.Error()), statusCode)} |
打印错误日志，哪个文件函数多少行，以及错误原因
4.常见错误处理
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func HandleInternalError(response *restful.Response, req *restful.Request, err error) {handle(http.StatusInternalServerError, response, req, err)}// HandleBadRequest writes http.StatusBadRequest and log errorfunc HandleBadRequest(response *restful.Response, req *restful.Request, err error) {handle(http.StatusBadRequest, response, req, err)}func HandleNotFound(response *restful.Response, req *restful.Request, err error) {handle(http.StatusNotFound, response, req, err)}func HandleForbidden(response *restful.Response, req *restful.Request, err error) {handle(http.StatusForbidden, response, req, err)}func HandleUnauthorized(response *restful.Response, req *restful.Request, err error) {handle(http.StatusUnauthorized, response, req, err)}func HandleTooManyRequests(response *restful.Response, req *restful.Request, err error) {handle(http.StatusTooManyRequests, response, req, err)}func HandleConflict(response *restful.Response, req *restful.Request, err error) {handle(http.StatusConflict, response, req, err)} |
5.共用错误处理
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func HandleAllStatus(statusCode int, response *restful.Response, value interface{}) {if value == nil {response.WriteHeader(statusCode)return}switch ee := value.(type) {case error:handle(statusCode, response, nil, ee)case string:response.WriteHeader(statusCode)response.WriteAsJson(value)returndefault:response.WriteHeader(statusCode)//处理是否为byte数组b, ok := value.([]byte)if ok {response.Write(b)} else {response.WriteEntity(value)}}} |
6.解析错误原因
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func parseValue(value interface{}, statusCode int) int {if value == nil {return statusCode}obj := make(map[string]interface{})switch tValue := value.(type) {case error:json.Unmarshal([]byte(tValue.Error()), &obj)default:b, ok := value.([]byte)if ok {json.Unmarshal(b, &obj)} else {j, err := json.Marshal(value)if err == nil {json.Unmarshal(j, &obj)}}}if s, o := obj["code"]; o {switch rs := s.(type) {case string:rs1, err := strconv.Atoi(rs)if err != nil {return rs1}case int:return rscase float64:return int(rs)default:return statusCode}}return statusCode} |
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原文链接：https://blog.51cto.com/u_12040959/5167726
