-
Notifications
You must be signed in to change notification settings - Fork 103
/
serialize.go
149 lines (129 loc) · 4.52 KB
/
serialize.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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
// Copyright (c) 2024 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package serialize
import (
"bytes"
"errors"
"fmt"
"io/ioutil"
"github.com/opentracing/opentracing-go"
"go.uber.org/thriftrw/protocol/binary"
"go.uber.org/thriftrw/wire"
"go.uber.org/yarpc/api/transport"
"go.uber.org/yarpc/serialize/internal"
)
// version indicates which underlying serialization method will be used
// '0' indicates:
//
// thrift serialization (request) + jaeger.binary format (ctx/tracing)
const version = byte(0)
// ToBytes encodes an opentracing.SpanContext and transport.Request into bytes
func ToBytes(tracer opentracing.Tracer, spanContext opentracing.SpanContext, req *transport.Request) ([]byte, error) {
spanBytes, err := spanContextToBytes(tracer, spanContext)
if err != nil {
return nil, err
}
body, err := ioutil.ReadAll(req.Body)
if err != nil {
return nil, err
}
rpc := internal.RPC{
SpanContext: spanBytes,
CallerName: req.Caller,
ServiceName: req.Service,
Encoding: string(req.Encoding),
Procedure: req.Procedure,
Headers: req.Headers.Items(),
ShardKey: &req.ShardKey,
RoutingKey: &req.RoutingKey,
RoutingDelegate: &req.RoutingDelegate,
Body: body,
}
wireValue, err := rpc.ToWire()
if err != nil {
return nil, err
}
var writer bytes.Buffer
// use the first byte to version the serialization
if err := writer.WriteByte(version); err != nil {
return nil, err
}
err = binary.Default.Encode(wireValue, &writer)
return writer.Bytes(), err
}
// FromBytes decodes bytes into a opentracing.SpanContext and transport.Request
func FromBytes(tracer opentracing.Tracer, request []byte) (opentracing.SpanContext, *transport.Request, error) {
if len(request) <= 1 {
return nil, nil, errors.New("cannot deserialize empty request")
}
// check valid thrift serialization byte
if request[0] != 0 {
return nil, nil,
fmt.Errorf(
"unsupported YARPC serialization version '%v' found during deserialization",
request[0])
}
reader := bytes.NewReader(request[1:])
wireValue, err := binary.Default.Decode(reader, wire.TStruct)
if err != nil {
return nil, nil, err
}
var rpc internal.RPC
if err = rpc.FromWire(wireValue); err != nil {
return nil, nil, err
}
req := transport.Request{
Caller: rpc.CallerName,
Service: rpc.ServiceName,
Encoding: transport.Encoding(rpc.Encoding),
Procedure: rpc.Procedure,
Headers: transport.HeadersFromMap(rpc.Headers),
Body: bytes.NewBuffer(rpc.Body),
}
if rpc.ShardKey != nil {
req.ShardKey = *rpc.ShardKey
}
if rpc.RoutingKey != nil {
req.RoutingKey = *rpc.RoutingKey
}
if rpc.RoutingDelegate != nil {
req.RoutingDelegate = *rpc.RoutingDelegate
}
spanContext, err := spanContextFromBytes(tracer, rpc.SpanContext)
if err != nil {
return nil, nil, err
}
return spanContext, &req, nil
}
func spanContextToBytes(tracer opentracing.Tracer, spanContext opentracing.SpanContext) ([]byte, error) {
carrier := bytes.NewBuffer([]byte{})
err := tracer.Inject(spanContext, opentracing.Binary, carrier)
return carrier.Bytes(), err
}
func spanContextFromBytes(tracer opentracing.Tracer, spanContextBytes []byte) (opentracing.SpanContext, error) {
carrier := bytes.NewBuffer(spanContextBytes)
spanContext, err := tracer.Extract(opentracing.Binary, carrier)
// If no SpanContext was given, we return nil instead of erroring
// transport.ExtractOpenTracingSpan() safely accepts nil
if err == opentracing.ErrSpanContextNotFound {
return nil, nil
}
return spanContext, err
}