/
grpc.go
84 lines (77 loc) · 2.04 KB
/
grpc.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
package validator
import (
"context"
"log/slog"
"google.golang.org/genproto/googleapis/rpc/errdetails"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
func grpcStatusErr(ctx context.Context, err error) error {
var errs []error
switch err := err.(type) {
case validationError:
errs = []error{err}
case validationMultiError:
errs = err.AllErrors()
default:
errs = nil
}
if len(errs) == 0 {
return err
}
st := status.New(codes.InvalidArgument, err.Error())
br := &errdetails.BadRequest{}
br.FieldViolations = make([]*errdetails.BadRequest_FieldViolation, len(errs))
for i, err := range errs {
if verr, ok := err.(validationError); ok {
br.FieldViolations[i] = &errdetails.BadRequest_FieldViolation{
Field: verr.Field(),
Description: verr.Reason(),
}
} else {
br.FieldViolations[i] = &errdetails.BadRequest_FieldViolation{
Field: "",
Description: err.Error(),
}
}
}
st, err = st.WithDetails(br)
if err != nil {
slog.ErrorContext(ctx, "failed to attach validation errors", "err", err)
return status.Error(codes.Unknown, err.Error())
}
return st.Err()
}
func UnaryServerInterceptor() grpc.UnaryServerInterceptor {
return func(ctx context.Context, req any, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (any, error) {
if err := Validate(ctx, req, grpcStatusErr); err != nil {
return nil, err
}
if resp, err := handler(ctx, req); err != nil {
return nil, grpcStatusErr(ctx, err)
} else {
return resp, nil
}
}
}
func StreamServerInterceptor() grpc.StreamServerInterceptor {
return func(srv any, stream grpc.ServerStream, info *grpc.StreamServerInfo, handler grpc.StreamHandler) error {
wrapper := &recvWrapper{
ServerStream: stream,
}
return handler(srv, wrapper)
}
}
type recvWrapper struct {
grpc.ServerStream
}
func (s *recvWrapper) RecvMsg(msg any) error {
if err := s.ServerStream.RecvMsg(msg); err != nil {
return err
}
if err := Validate(s.Context(), msg, grpcStatusErr); err != nil {
return err
}
return nil
}