/
protoconv.go
95 lines (84 loc) · 2.69 KB
/
protoconv.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
85
86
87
88
89
90
91
92
93
94
95
// Copyright Istio Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package protoconv
import (
"fmt"
udpa "github.com/cncf/xds/go/udpa/type/v1"
"google.golang.org/protobuf/encoding/prototext"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/types/known/anypb"
"google.golang.org/protobuf/types/known/structpb"
"istio.io/istio/pilot/pkg/features"
"istio.io/istio/pkg/log"
)
// MessageToAnyWithError converts from proto message to proto Any
func MessageToAnyWithError(msg proto.Message) (*anypb.Any, error) {
b, err := marshal(msg)
if err != nil {
return nil, err
}
return &anypb.Any{
// nolint: staticcheck
TypeUrl: "type.googleapis.com/" + string(msg.ProtoReflect().Descriptor().FullName()),
Value: b,
}, nil
}
func marshal(msg proto.Message) ([]byte, error) {
if features.EnableVtprotobuf {
if vt, ok := msg.(vtStrictMarshal); ok {
// Attempt to use more efficient implementation
// "Strict" is the equivalent to Deterministic=true below
return vt.MarshalVTStrict()
}
}
// If not available, fallback to normal implementation
return proto.MarshalOptions{Deterministic: true}.Marshal(msg)
}
// MessageToAny converts from proto message to proto Any
func MessageToAny(msg proto.Message) *anypb.Any {
out, err := MessageToAnyWithError(msg)
if err != nil {
log.Error(fmt.Sprintf("error marshaling Any %s: %v", prototext.Format(msg), err))
return nil
}
return out
}
func TypedStructWithFields(typeURL string, fields map[string]interface{}) *anypb.Any {
value, err := structpb.NewStruct(fields)
if err != nil {
log.Error(fmt.Sprintf("error marshaling struct %s: %v", typeURL, err))
}
return MessageToAny(&udpa.TypedStruct{
TypeUrl: typeURL,
Value: value,
})
}
func SilentlyUnmarshalAny[T any](a *anypb.Any) *T {
res, err := UnmarshalAny[T](a)
if err != nil {
return nil
}
return res
}
func UnmarshalAny[T any](a *anypb.Any) (*T, error) {
dst := any(new(T)).(proto.Message)
if err := a.UnmarshalTo(dst); err != nil {
return nil, fmt.Errorf("failed to unmarshal to %T: %v", dst, err)
}
return any(dst).(*T), nil
}
// https://github.com/planetscale/vtprotobuf#available-features
type vtStrictMarshal interface {
MarshalVTStrict() ([]byte, error)
}