-
Notifications
You must be signed in to change notification settings - Fork 0
/
client_proto.go
274 lines (251 loc) · 7.67 KB
/
client_proto.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
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
package schema_registry
import (
"bytes"
"context"
"crypto/sha256"
"encoding/base64"
"fmt"
"github.com/golang/protobuf/proto"
"github.com/jhump/protoreflect/desc"
"github.com/jhump/protoreflect/desc/builder"
"github.com/jhump/protoreflect/desc/protoparse"
"github.com/jhump/protoreflect/desc/protoprint"
"google.golang.org/protobuf/reflect/protodesc"
"google.golang.org/protobuf/reflect/protoreflect"
"google.golang.org/protobuf/reflect/protoregistry"
"google.golang.org/protobuf/types/descriptorpb"
"google.golang.org/protobuf/types/dynamicpb"
"io"
"io/ioutil"
"strings"
)
func (c *Client) RegisterProtobufType(ctx context.Context, subject string, protoType protoreflect.Message) (uint32, error) {
if id, ok := c.cacheProto[protoType.Type()]; ok {
return id, nil
}
md := protoType.Descriptor()
refs, err := c.registerReferencedProtoSchemas(ctx, md.ParentFile())
if err != nil {
return 0, fmt.Errorf("RegisterProtobufType.registerReferencedProtoSchemas: %v", err)
}
parentFileSchema, err := NewProtobufSchema(md.ParentFile())
if err != nil {
return 0, fmt.Errorf("RegisterProtobufType.NewProtobufSchema: %v", err)
}
b := builder.NewFile(fmt.Sprintf("%v", md.ParentFile().Path())).
SetPackageName(parentFileSchema.definition.GetPackage()).
SetProto3(parentFileSchema.definition.IsProto3())
msg := parentFileSchema.definition.FindMessage(string(md.FullName()))
if msg == nil {
return 0, fmt.Errorf("RegisterProtobufType.FindMessage: not found: %s", md.FullName())
}
err = c.addMessage(b, msg)
if err != nil {
return 0, fmt.Errorf("RegisterProtobufType.addMessage: not found: %s", md.FullName())
}
f, err := b.Build()
if err != nil {
return 0, fmt.Errorf("RegisterProtobufType.Build: %v", err)
}
fd := f.AsFileDescriptorProto()
pfd, err := protodesc.NewFile(fd, c.resolverWithReferences(ctx, refs))
if err != nil {
return 0, fmt.Errorf("RegisterProtobufType.NewFile: %v", err)
}
schema := &ProtobufSchema{
definition: f,
descriptor: pfd,
}
body, err := schema.Render()
if err != nil {
return 0, err
}
id, err := c.registerSchemaUnderSubject(ctx, subject, schemaTypeProtobuf, body, refs)
if err != nil {
return 0, err
}
c.cacheProto[protoType.Type()] = id
return id, nil
}
func (c *Client) addMessage(b *builder.FileBuilder, d *desc.MessageDescriptor) error {
messages := make(map[string]*builder.MessageBuilder)
var process func(field *desc.FieldDescriptor) (*builder.FieldBuilder, error)
traverse := func(msg *desc.MessageDescriptor) (*builder.MessageBuilder, error) {
m, ok := messages[msg.GetName()]
if ok {
return m, nil
}
m = builder.NewMessage(msg.GetName())
messages[msg.GetName()] = m
for _, field := range msg.GetFields() {
f, err := process(field)
if err != nil {
return nil, err
}
m.AddField(f)
}
return m, nil
}
process = func(field *desc.FieldDescriptor) (*builder.FieldBuilder, error) {
if field.GetType() == descriptorpb.FieldDescriptorProto_TYPE_MESSAGE {
ref := field.GetMessageType()
if ref.GetFile().GetFullyQualifiedName() == b.GetFile().GetName() {
if field.IsMap() {
//map keys and values are treated recursively
mk, err := process(field.GetMapKeyType())
if err != nil {
return nil, err
}
mv, err := process(field.GetMapValueType())
if err != nil {
return nil, err
}
return builder.NewMapField(field.GetName(), mk.GetType(), mv.GetType()), nil
}
mb, err := traverse(ref)
if err != nil {
return nil, err
}
//adopt locally referenced message from the same file
f := builder.NewField(field.GetName(), builder.FieldTypeMessage(mb))
if field.IsRepeated() {
f.SetRepeated()
}
if field.IsRequired() {
f.SetRepeated()
}
if field.IsProto3Optional() {
f.SetProto3Optional(true)
}
f.SetJsonName(field.GetJSONName())
f.SetLabel(field.GetLabel())
f.SetNumber(field.GetNumber())
f.SetOptions(field.GetFieldOptions())
return f, nil
}
}
//otherwise just clone the original field
return builder.FromField(field)
}
_, err := traverse(d)
if err != nil {
return err
}
for _, local := range messages {
b.AddMessage(local)
}
return nil
}
func (c *Client) deserializeProtobuf(ctx context.Context, schema *ProtobufSchema, data []byte) (proto.Message, error) {
//serialized data gave file descriptors containing exactly one message
m := schema.descriptor.Messages()
if m.Len() == 0 {
return nil, fmt.Errorf("serialized types are expected to have at least one message descriptor")
}
md := m.Get(0)
var result proto.Message
//try specific proto message type first
fn := md.FullName()
p, err := protoregistry.GlobalTypes.FindMessageByName(fn)
if err != nil {
return nil, fmt.Errorf("failed to locate global message type %v: %v", fn, err)
}
if p != nil {
result = proto.MessageV1(p.New())
} else {
//otherwise resolve with dynamicpb
result = dynamicpb.NewMessage(md)
}
err = c.deserializeProtobufInto(ctx, data[5:], result)
return result, err
}
func (c *Client) deserializeProtobufInto(_ context.Context, payload []byte, result proto.Message) error {
return proto.Unmarshal(payload, result)
}
func (c *Client) parseProtobufSchema(ctx context.Context, definition string, refs references, name *string) (*ProtobufSchema, error) {
var uniqueName string
if name == nil {
hash := sha256.Sum256([]byte(definition))
uniqueName = base64.StdEncoding.EncodeToString(hash[:])
} else {
uniqueName = *name
}
parser := &protoparse.Parser{
Accessor: func(filename string) (io.ReadCloser, error) {
if filename == uniqueName {
return ioutil.NopCloser(strings.NewReader(definition)), nil
} else {
return nil, protoregistry.NotFound
}
},
}
fds, err := parser.ParseFilesButDoNotLink(uniqueName)
fd := fds[0]
if err != nil {
return nil, err
}
file, err := protodesc.NewFile(fd, c.resolverWithReferences(ctx, refs))
if err != nil {
return nil, fmt.Errorf("could not resolve proto message by parsing: %v", err)
}
return NewProtobufSchema(file)
}
func (c *Client) registerReferencedProtoSchemas(ctx context.Context, file protoreflect.FileDescriptor) (references, error) {
var register func(in protoreflect.FileDescriptor) (*desc.FileDescriptor, references, error)
register = func(in protoreflect.FileDescriptor) (*desc.FileDescriptor, references, error) {
fdpb := protodesc.ToFileDescriptorProto(in)
imports := in.Imports()
refs := make(references, 0)
var deps []*desc.FileDescriptor
for i := 0; i < imports.Len(); i++ {
imp := imports.Get(i)
dp, drefs, err := register(imp)
if err != nil {
return nil, nil, err
}
for _, r := range drefs {
refs = append(refs, r)
}
deps = append(deps, dp)
}
fd, err := desc.CreateFileDescriptor(fdpb, deps...)
if err != nil {
return nil, nil, err
}
printer := new(protoprint.Printer)
buf := new(bytes.Buffer)
err = printer.PrintProtoFile(fd, buf)
if err != nil {
return nil, nil, err
}
id, err := c.registerSchemaUnderSubject(ctx, in.Path(), schemaTypeProtobuf, buf.String(), refs)
if err != nil {
return nil, nil, err
}
version, err := c.GetSubjectVersionBySchemaId(ctx, in.Path(), id)
if err != nil {
return nil, nil, err
}
refs = append(refs, reference{
Name: in.Path(),
Subject: in.Path(),
Version: version,
})
return fd, refs, nil
}
refs := make(references, 0)
imports := file.Imports()
for i := 0; i < imports.Len(); i ++ {
_, irefs, err := register(imports.Get(i))
if err != nil {
return nil, err
}
for _, r := range irefs {
refs = append(refs, r)
}
}
return refs, nil
}
func (c *Client) resolverWithReferences(ctx context.Context, refs references) protodesc.Resolver {
return &versionedResolver{ctx: ctx, registry: c, refs: refs}
}