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status_err.go
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/
status_err.go
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package statuserror
import (
"fmt"
"io"
"net/http"
"strconv"
"strings"
"github.com/pkg/errors"
)
func IsStatusErr(err error) (*StatusErr, bool) {
if err == nil {
return nil, false
}
if statusError, ok := err.(StatusError); ok {
return statusError.StatusErr(), ok
}
statusErr, ok := err.(*StatusErr)
return statusErr, ok
}
func FromErr(err error) *StatusErr {
if err == nil {
return nil
}
if statusErr, ok := IsStatusErr(err); ok {
return statusErr
}
return Wrap(err, http.StatusInternalServerError, "UnknownError", "unknown error")
}
func Wrap(err error, code int, key string, msgAndDesc ...string) *StatusErr {
if err == nil {
return nil
}
if len(strconv.Itoa(code)) == 3 {
code = code * 1e6
}
msg := key
if len(msgAndDesc) > 0 {
msg = msgAndDesc[0]
}
desc := ""
if len(msgAndDesc) > 1 {
desc = strings.Join(msgAndDesc[1:], "\n")
} else {
desc = err.Error()
}
// err = errors.WithMessage(err, "asdfasdfasdfasdfass")
s := &StatusErr{
Key: key,
Code: code,
Msg: msg,
Desc: desc,
error: errors.WithStack(err),
}
return s
}
type StatusErr struct {
// key of err
Key string `json:"key" xml:"key"`
// http code
Code int `json:"code" xml:"code"`
// msg of err
Msg string `json:"msg" xml:"msg"`
// desc of err
Desc string `json:"desc" xml:"desc"`
// can be task error
// for client to should error msg to end user
CanBeTalkError bool `json:"canBeTalkError" xml:"canBeTalkError"`
// request ID or other request context
ID string `json:"id" xml:"id"`
// error tracing
Sources []string `json:"sources" xml:"sources"`
// error in where fields
ErrorFields ErrorFields `json:"errorFields" xml:"errorFields"`
error error
}
func (statusErr *StatusErr) Format(s fmt.State, verb rune) {
switch verb {
case 'v':
if s.Flag('+') {
e := statusErr.Unwrap()
if w, ok := e.(WithStackTrace); ok {
stackTrace := w.StackTrace()
if len(stackTrace) > 1 {
_, _ = fmt.Fprintf(s, statusErr.Error()+"%+v", stackTrace[1:])
}
}
return
}
fallthrough
case 's':
_, _ = io.WriteString(s, statusErr.Error())
case 'q':
_, _ = fmt.Fprintf(s, "%q", statusErr.Error())
}
}
type WithStackTrace interface {
StackTrace() errors.StackTrace
}
func (statusErr *StatusErr) Unwrap() error {
return statusErr.error
}
func (statusErr *StatusErr) Summary() string {
s := fmt.Sprintf(
`@StatusErr[%s][%d][%s]`,
statusErr.Key,
statusErr.Code,
statusErr.Msg,
)
if statusErr.CanBeTalkError {
return s + "!"
}
return s
}
func (statusErr *StatusErr) Is(err error) bool {
e := FromErr(err)
if statusErr == nil || e == nil {
return false
}
return e.Key == statusErr.Key && e.Code == statusErr.Code
}
func StatusCodeFromCode(code int) int {
strCode := fmt.Sprintf("%d", code)
if len(strCode) < 3 {
return 0
}
statusCode, _ := strconv.Atoi(strCode[:3])
return statusCode
}
func (statusErr *StatusErr) StatusCode() int {
return StatusCodeFromCode(statusErr.Code)
}
func (statusErr *StatusErr) Error() string {
s := fmt.Sprintf(
"[%s]%s%s",
strings.Join(statusErr.Sources, ","),
statusErr.Summary(),
statusErr.ErrorFields,
)
if statusErr.Desc != "" {
s += " " + statusErr.Desc
}
return s
}
func (statusErr StatusErr) WithMsg(msg string) *StatusErr {
statusErr.Msg = msg
return &statusErr
}
func (statusErr StatusErr) WithDesc(desc string) *StatusErr {
statusErr.Desc = desc
return &statusErr
}
func (statusErr StatusErr) WithID(id string) *StatusErr {
statusErr.ID = id
return &statusErr
}
func (statusErr StatusErr) AppendSource(sourceName string) *StatusErr {
length := len(statusErr.Sources)
if length == 0 || statusErr.Sources[length-1] != sourceName {
statusErr.Sources = append(statusErr.Sources, sourceName)
}
return &statusErr
}
func (statusErr StatusErr) EnableErrTalk() *StatusErr {
statusErr.CanBeTalkError = true
return &statusErr
}
func (statusErr StatusErr) DisableErrTalk() *StatusErr {
statusErr.CanBeTalkError = false
return &statusErr
}
func (statusErr StatusErr) AppendErrorField(in string, field string, msg string) *StatusErr {
statusErr.ErrorFields = append(statusErr.ErrorFields, NewErrorField(in, field, msg))
return &statusErr
}
func (statusErr StatusErr) AppendErrorFields(errorFields ...*ErrorField) *StatusErr {
statusErr.ErrorFields = append(statusErr.ErrorFields, errorFields...)
return &statusErr
}