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116 lines
2.8 KiB
116 lines
2.8 KiB
package errors
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import (
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"errors"
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"fmt"
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"github.com/go-kratos/kratos/v2/internal/httputil"
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"google.golang.org/genproto/googleapis/rpc/errdetails"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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"google.golang.org/protobuf/proto"
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)
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// UnknownReason is unknown reason for error info.
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const UnknownReason = ""
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//go:generate protoc -I. --go_out=paths=source_relative:. errors.proto
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func (e *Error) Error() string {
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return fmt.Sprintf("error: code = %d reason = %s message = %s metadata = %v", e.Code, e.Reason, e.Message, e.Metadata)
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}
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// StatusCode return an HTTP error code.
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func (e *Error) StatusCode() int {
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return int(e.Code)
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}
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// GRPCStatus returns the Status represented by se.
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func (e *Error) GRPCStatus() *status.Status {
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s, _ := status.New(httputil.GRPCCodeFromStatus(e.StatusCode()), e.Message).
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WithDetails(&errdetails.ErrorInfo{
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Reason: e.Reason,
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Metadata: e.Metadata,
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})
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return s
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}
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// Is matches each error in the chain with the target value.
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func (e *Error) Is(err error) bool {
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if se := new(Error); errors.As(err, &se) {
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return se.Reason == e.Reason
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}
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return false
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}
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// WithMetadata with an MD formed by the mapping of key, value.
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func (e *Error) WithMetadata(md map[string]string) *Error {
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err := proto.Clone(e).(*Error)
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err.Metadata = md
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return err
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}
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// New returns an error object for the code, message.
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func New(code int, reason, message string) *Error {
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return &Error{
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Code: int32(code),
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Message: message,
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Reason: reason,
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}
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}
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// Newf New(code fmt.Sprintf(format, a...))
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func Newf(code int, reason, format string, a ...interface{}) *Error {
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return New(code, reason, fmt.Sprintf(format, a...))
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}
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// Errorf returns an error object for the code, message and error info.
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func Errorf(code int, reason, format string, a ...interface{}) error {
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return New(code, reason, fmt.Sprintf(format, a...))
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}
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// Code returns the code for a particular error.
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// It supports wrapped errors.
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func Code(err error) codes.Code {
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if err == nil {
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return codes.OK
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}
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if se := FromError(err); err != nil {
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return codes.Code(se.Code)
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}
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return codes.Unknown
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}
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// Reason returns the reason for a particular error.
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// It supports wrapped errors.
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func Reason(err error) string {
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if se := FromError(err); err != nil {
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return se.Reason
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}
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return UnknownReason
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}
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// FromError try to convert an error to *Error.
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// It supports wrapped errors.
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func FromError(err error) *Error {
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if err == nil {
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return nil
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}
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if se := new(Error); errors.As(err, &se) {
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return se
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}
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gs, ok := status.FromError(err)
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if ok {
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for _, detail := range gs.Details() {
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switch d := detail.(type) {
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case *errdetails.ErrorInfo:
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return New(
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httputil.StatusFromGRPCCode(gs.Code()),
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d.Reason,
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gs.Message(),
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).WithMetadata(d.Metadata)
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}
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}
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}
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return New(httputil.StatusFromGRPCCode(gs.Code()), UnknownReason, err.Error())
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}
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