/
caller.go
47 lines (39 loc) · 1.43 KB
/
caller.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
package iamexample
import (
"context"
"go.einride.tech/iam/iamcaller"
iamv1 "go.einride.tech/iam/proto/gen/einride/iam/v1"
"google.golang.org/grpc/metadata"
"google.golang.org/protobuf/types/known/timestamppb"
)
// MemberHeader is the gRPC header used by the example server to determine IAM members of the caller.
const MemberHeader = "x-iam-example-members"
// NewMemberHeaderResolver returns an iammember.Resolver that resolves members from MemberHeader.
func NewMemberHeaderResolver() iamcaller.Resolver {
return &memberHeaderResolver{}
}
var _ iamcaller.Resolver = &memberHeaderResolver{}
type memberHeaderResolver struct{}
// ResolveCaller implements iamcaller.Resolver.
func (m *memberHeaderResolver) ResolveCaller(ctx context.Context) (*iamv1.Caller, error) {
var result iamv1.Caller
if md, ok := metadata.FromIncomingContext(ctx); ok {
iamcaller.Add(&result, MemberHeader, &iamv1.Caller_Metadata{
Members: md.Get(MemberHeader),
})
}
if deadline, ok := ctx.Deadline(); ok {
result.Context = &iamv1.Caller_Context{
Deadline: timestamppb.New(deadline),
}
}
return &result, nil
}
// WithOutgoingMembers appends the provided members to the outgoing gRPC context.
func WithOutgoingMembers(ctx context.Context, members ...string) context.Context {
pairs := make([]string, 0, len(members)*2)
for _, member := range members {
pairs = append(pairs, MemberHeader, member)
}
return metadata.AppendToOutgoingContext(ctx, pairs...)
}