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
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
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
func HandleInternalError(response *restful.Response, req *restful.Request, err error) {
handle(http.StatusInternalServerError, response, req, err)
}
// HandleBadRequest writes http.StatusBadRequest and log error
func 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
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)
return
default:
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
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 rs
case float64:
return int(rs)
default:
return statusCode
}
}
return statusCode
}到此这篇关于golang为什么要统一错误处理的文章就介绍到这了,更多相关golang统一错误处理内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网！
