micro/errors/errors.go
Vasiliy Tolstov ab73127063
grpc client/server fixes (#1355)
* grpc client/server fixes

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
2020-03-17 14:27:20 +03:00

137 lines
2.7 KiB
Go

// Package errors provides a way to return detailed information
// for an RPC request error. The error is normally JSON encoded.
package errors
import (
"encoding/json"
"fmt"
"net/http"
)
//go:generate protoc -I. --go_out=paths=source_relative:. errors.proto
func (e *Error) Error() string {
b, _ := json.Marshal(e)
return string(b)
}
// New generates a custom error.
func New(id, detail string, code int32) error {
return &Error{
Id: id,
Code: code,
Detail: detail,
Status: http.StatusText(int(code)),
}
}
// Parse tries to parse a JSON string into an error. If that
// fails, it will set the given string as the error detail.
func Parse(err string) *Error {
e := new(Error)
errr := json.Unmarshal([]byte(err), e)
if errr != nil {
e.Detail = err
}
return e
}
// BadRequest generates a 400 error.
func BadRequest(id, format string, a ...interface{}) error {
return &Error{
Id: id,
Code: 400,
Detail: fmt.Sprintf(format, a...),
Status: http.StatusText(400),
}
}
// Unauthorized generates a 401 error.
func Unauthorized(id, format string, a ...interface{}) error {
return &Error{
Id: id,
Code: 401,
Detail: fmt.Sprintf(format, a...),
Status: http.StatusText(401),
}
}
// Forbidden generates a 403 error.
func Forbidden(id, format string, a ...interface{}) error {
return &Error{
Id: id,
Code: 403,
Detail: fmt.Sprintf(format, a...),
Status: http.StatusText(403),
}
}
// NotFound generates a 404 error.
func NotFound(id, format string, a ...interface{}) error {
return &Error{
Id: id,
Code: 404,
Detail: fmt.Sprintf(format, a...),
Status: http.StatusText(404),
}
}
// MethodNotAllowed generates a 405 error.
func MethodNotAllowed(id, format string, a ...interface{}) error {
return &Error{
Id: id,
Code: 405,
Detail: fmt.Sprintf(format, a...),
Status: http.StatusText(405),
}
}
// Timeout generates a 408 error.
func Timeout(id, format string, a ...interface{}) error {
return &Error{
Id: id,
Code: 408,
Detail: fmt.Sprintf(format, a...),
Status: http.StatusText(408),
}
}
// Conflict generates a 409 error.
func Conflict(id, format string, a ...interface{}) error {
return &Error{
Id: id,
Code: 409,
Detail: fmt.Sprintf(format, a...),
Status: http.StatusText(409),
}
}
// InternalServerError generates a 500 error.
func InternalServerError(id, format string, a ...interface{}) error {
return &Error{
Id: id,
Code: 500,
Detail: fmt.Sprintf(format, a...),
Status: http.StatusText(500),
}
}
func Equal(err1 error, err2 error) bool {
verr1, ok1 := err1.(*Error)
verr2, ok2 := err2.(*Error)
if ok1 != ok2 {
return false
}
if !ok1 {
return err1 == err2
}
if verr1.Code != verr2.Code {
return false
}
return true
}