forked from jhump/protoreflect
/
message_registry.go
743 lines (683 loc) · 22.5 KB
/
message_registry.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
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
package msgregistry
import (
"fmt"
"reflect"
"strings"
"sync"
"github.com/golang/protobuf/jsonpb"
"github.com/golang/protobuf/proto"
"github.com/golang/protobuf/ptypes"
"google.golang.org/protobuf/types/descriptorpb"
"google.golang.org/protobuf/types/known/anypb"
"google.golang.org/protobuf/types/known/apipb"
"google.golang.org/protobuf/types/known/sourcecontextpb"
"google.golang.org/protobuf/types/known/typepb"
"google.golang.org/protobuf/types/known/wrapperspb"
"github.com/Big-big-orange/protoreflect/desc"
"github.com/Big-big-orange/protoreflect/dynamic"
)
const googleApisDomain = "type.googleapis.com"
// ErrUnexpectedType is returned if the URL that was requested
// resolved to an enum instead of a message, or vice versa.
type ErrUnexpectedType struct {
URL string
ShouldBeEnum bool
}
func (e *ErrUnexpectedType) Error() string {
msg := "wanted message, got enum"
if e.ShouldBeEnum {
msg = "wanted enum, got message"
}
return fmt.Sprintf("type for URL %q is the wrong type: %s", e.URL, msg)
}
// MessageRegistry is a registry that maps URLs to message types. It allows for marshalling
// and unmarshalling Any types to and from dynamic messages.
type MessageRegistry struct {
resolver typeResolver
mf *dynamic.MessageFactory
er *dynamic.ExtensionRegistry
mu sync.RWMutex
types map[string]desc.Descriptor
baseUrls map[string]string
defaultBaseUrl string
}
// NewMessageRegistryWithDefaults is a registry that includes all "default" message types,
// which are those that are statically linked into the current program (e.g. registered by
// protoc-generated code via proto.RegisterType). Note that it cannot resolve "default" enum
// types since those don't actually get registered by protoc-generated code the same way.
// Any types explicitly added to the registry will override any default message types with
// the same URL.
func NewMessageRegistryWithDefaults() *MessageRegistry {
mf := dynamic.NewMessageFactoryWithDefaults()
return &MessageRegistry{
mf: mf,
er: mf.GetExtensionRegistry(),
}
}
// WithFetcher sets the TypeFetcher that this registry uses to resolve unknown URLs. If no fetcher
// is configured for the registry then unknown URLs cannot be resolved. Known URLs are those for
// explicitly registered types and, if the registry includes "default" types, those for statically
// linked message types. This method is not thread-safe and is intended to be used for one-time
// initialization of the registry, before it is published for use by other threads.
func (r *MessageRegistry) WithFetcher(fetcher TypeFetcher) *MessageRegistry {
r.resolver = typeResolver{fetcher: fetcher, mr: r}
return r
}
// WithMessageFactory sets the MessageFactory used to instantiate any messages.
// This method is not thread-safe and is intended to be used for one-time
// initialization of the registry, before it is published for use by other threads.
func (r *MessageRegistry) WithMessageFactory(mf *dynamic.MessageFactory) *MessageRegistry {
r.mf = mf
if mf == nil {
r.er = nil
} else {
r.er = mf.GetExtensionRegistry()
}
return r
}
// WithDefaultBaseUrl sets the default base URL used when constructing type URLs for
// marshalling messages as Any types and converting descriptors to well-known type
// descriptions (ptypes). If unspecified, the default base URL will be "type.googleapis.com".
// This method is not thread-safe and is intended to be used for one-time initialization
// of the registry, before it is published for use by other threads.
func (r *MessageRegistry) WithDefaultBaseUrl(baseUrl string) *MessageRegistry {
baseUrl = stripTrailingSlash(baseUrl)
r.defaultBaseUrl = baseUrl
return r
}
func stripTrailingSlash(url string) string {
if url[len(url)-1] == '/' {
return url[:len(url)-1]
}
return url
}
// AddMessage adds the given URL and associated message descriptor to the registry.
func (r *MessageRegistry) AddMessage(url string, md *desc.MessageDescriptor) error {
url = ensureScheme(url)
baseUrl := strings.TrimSuffix(url, "/"+md.GetFullyQualifiedName())
if url == baseUrl {
return fmt.Errorf("URL %s is invalid: it should end with path element %s", url, md.GetFullyQualifiedName())
}
r.mu.Lock()
defer r.mu.Unlock()
if r.types == nil {
r.types = map[string]desc.Descriptor{}
}
r.types[url] = md
if r.baseUrls == nil {
r.baseUrls = map[string]string{}
}
r.baseUrls[md.GetFullyQualifiedName()] = baseUrl
return nil
}
// AddEnum adds the given URL and associated enum descriptor to the registry.
func (r *MessageRegistry) AddEnum(url string, ed *desc.EnumDescriptor) error {
url = ensureScheme(url)
baseUrl := strings.TrimSuffix(url, "/"+ed.GetFullyQualifiedName())
if url == baseUrl {
return fmt.Errorf("URL %s is invalid: it should end with path element %s", url, ed.GetFullyQualifiedName())
}
r.mu.Lock()
defer r.mu.Unlock()
if r.types == nil {
r.types = map[string]desc.Descriptor{}
}
r.types[url] = ed
if r.baseUrls == nil {
r.baseUrls = map[string]string{}
}
r.baseUrls[ed.GetFullyQualifiedName()] = baseUrl
return nil
}
// AddFile adds to the registry all message and enum types in the given file. The URL for each type
// is derived using the given base URL as "baseURL/fully.qualified.type.name".
func (r *MessageRegistry) AddFile(baseUrl string, fd *desc.FileDescriptor) {
baseUrl = stripTrailingSlash(ensureScheme(baseUrl))
r.mu.Lock()
defer r.mu.Unlock()
if r.types == nil {
r.types = map[string]desc.Descriptor{}
}
if r.baseUrls == nil {
r.baseUrls = map[string]string{}
}
r.addEnumTypesLocked(baseUrl, fd.GetEnumTypes())
r.addMessageTypesLocked(baseUrl, fd.GetMessageTypes())
}
func (r *MessageRegistry) addEnumTypesLocked(baseUrl string, enums []*desc.EnumDescriptor) {
for _, ed := range enums {
url := fmt.Sprintf("%s/%s", baseUrl, ed.GetFullyQualifiedName())
r.types[url] = ed
r.baseUrls[ed.GetFullyQualifiedName()] = baseUrl
}
}
func (r *MessageRegistry) addMessageTypesLocked(baseUrl string, msgs []*desc.MessageDescriptor) {
for _, md := range msgs {
url := fmt.Sprintf("%s/%s", baseUrl, md.GetFullyQualifiedName())
r.types[url] = md
r.baseUrls[md.GetFullyQualifiedName()] = baseUrl
r.addEnumTypesLocked(baseUrl, md.GetNestedEnumTypes())
r.addMessageTypesLocked(baseUrl, md.GetNestedMessageTypes())
}
}
// FindMessageTypeByUrl finds a message descriptor for the type at the given URL. It may
// return nil if the registry is empty and cannot resolve unknown URLs. If an error occurs
// while resolving the URL, it is returned. If the resolved type is a enum, ErrUnexpectedType
// is returned.
func (r *MessageRegistry) FindMessageTypeByUrl(url string) (*desc.MessageDescriptor, error) {
md, err := r.getRegisteredMessageTypeByUrl(url)
if err != nil {
return nil, err
} else if md != nil {
return md, err
}
if r.resolver.fetcher == nil {
return nil, nil
}
return r.resolver.resolveUrlToMessageDescriptor(url)
}
func (r *MessageRegistry) getRegisteredMessageTypeByUrl(url string) (*desc.MessageDescriptor, error) {
if r != nil {
r.mu.RLock()
m := r.types[ensureScheme(url)]
r.mu.RUnlock()
if m != nil {
if md, ok := m.(*desc.MessageDescriptor); ok {
return md, nil
}
return nil, &ErrUnexpectedType{
URL: url,
}
}
}
var ktr *dynamic.KnownTypeRegistry
if r != nil {
ktr = r.mf.GetKnownTypeRegistry()
}
msgType := ktr.GetKnownType(typeName(url))
if msgType == nil {
return nil, nil
}
return desc.LoadMessageDescriptorForType(msgType)
}
// FindEnumTypeByUrl finds an enum descriptor for the type at the given URL. It may return nil
// if the registry is empty and cannot resolve unknown URLs. If an error occurs while resolving
// the URL, it is returned. If the resolved type is a message, ErrUnexpectedType is returned.
func (r *MessageRegistry) FindEnumTypeByUrl(url string) (*desc.EnumDescriptor, error) {
ed, err := r.getRegisteredEnumTypeByUrl(url)
if err != nil {
return nil, err
} else if ed != nil {
return ed, err
}
if r.resolver.fetcher == nil {
return nil, nil
}
if ed, err := r.resolver.resolveUrlToEnumDescriptor(url); err != nil {
return nil, err
} else {
return ed, nil
}
}
func (r *MessageRegistry) getRegisteredEnumTypeByUrl(url string) (*desc.EnumDescriptor, error) {
if r == nil {
return nil, nil
}
r.mu.RLock()
m := r.types[ensureScheme(url)]
r.mu.RUnlock()
if m != nil {
if ed, ok := m.(*desc.EnumDescriptor); ok {
return ed, nil
}
return nil, &ErrUnexpectedType{
URL: url,
}
}
return nil, nil
}
// ResolveApiIntoServiceDescriptor constructs a service descriptor that describes the given API.
// If any of the service's request or response type URLs cannot be resolved by this registry, a
// nil descriptor is returned.
func (r *MessageRegistry) ResolveApiIntoServiceDescriptor(a *apipb.Api) (*desc.ServiceDescriptor, error) {
if r == nil {
return nil, nil
}
msgs := map[string]*desc.MessageDescriptor{}
unresolved := map[string]struct{}{}
for _, m := range a.Methods {
// request type
md, err := r.getRegisteredMessageTypeByUrl(m.RequestTypeUrl)
if err != nil {
return nil, err
} else if md == nil {
if r.resolver.fetcher == nil {
return nil, nil
}
unresolved[m.RequestTypeUrl] = struct{}{}
} else {
msgs[m.RequestTypeUrl] = md
}
// and response type
md, err = r.getRegisteredMessageTypeByUrl(m.ResponseTypeUrl)
if err != nil {
return nil, err
} else if md == nil {
if r.resolver.fetcher == nil {
return nil, nil
}
unresolved[m.ResponseTypeUrl] = struct{}{}
} else {
msgs[m.ResponseTypeUrl] = md
}
}
if len(unresolved) > 0 {
unresolvedSlice := make([]string, 0, len(unresolved))
for k := range unresolved {
unresolvedSlice = append(unresolvedSlice, k)
}
mp, err := r.resolver.resolveUrlsToMessageDescriptors(unresolvedSlice...)
if err != nil {
return nil, err
}
for u, md := range mp {
msgs[u] = md
}
}
var fileName string
if a.SourceContext != nil && a.SourceContext.FileName != "" {
fileName = a.SourceContext.FileName
} else {
fileName = "--unknown--.proto"
}
// now we add all types we care about to a typeTrie and use that to generate file descriptors
files := map[string]*fileEntry{}
fe := &fileEntry{}
fe.proto3 = a.Syntax == typepb.Syntax_SYNTAX_PROTO3
files[fileName] = fe
fe.types.addType(a.Name, createServiceDescriptor(a, r))
added := newNameTracker()
for _, md := range msgs {
addDescriptors(fileName, files, md, msgs, added)
}
// build resulting file descriptor(s) and return the final service descriptor
fileDescriptors, err := toFileDescriptors(files, (*typeTrie).rewriteDescriptor)
if err != nil {
return nil, err
}
return fileDescriptors[fileName].FindService(a.Name), nil
}
// UnmarshalAny will unmarshal the value embedded in the given Any value. This will use this
// registry to resolve the given value's type URL. Use this instead of ptypes.UnmarshalAny for
// cases where the type might not be statically linked into the current program.
func (r *MessageRegistry) UnmarshalAny(a *anypb.Any) (proto.Message, error) {
return r.unmarshalAny(a, r.FindMessageTypeByUrl)
}
func (r *MessageRegistry) unmarshalAny(a *anypb.Any, fetch func(string) (*desc.MessageDescriptor, error)) (proto.Message, error) {
name, err := ptypes.AnyMessageName(a)
if err != nil {
return nil, err
}
var msg proto.Message
var mf *dynamic.MessageFactory
var ktr *dynamic.KnownTypeRegistry
if r != nil {
mf = r.mf
ktr = r.mf.GetKnownTypeRegistry()
}
if msg = ktr.CreateIfKnown(name); msg == nil {
if md, err := fetch(a.TypeUrl); err != nil {
return nil, err
} else if md == nil {
return nil, fmt.Errorf("unknown message type: %s", a.TypeUrl)
} else {
msg = mf.NewDynamicMessage(md)
}
}
err = proto.Unmarshal(a.Value, msg)
if err != nil {
return nil, err
} else {
return msg, nil
}
}
// AddBaseUrlForElement adds a base URL for the given package or fully-qualified type name.
// This is used to construct type URLs for message types. If a given type has an associated
// base URL, it is used. Otherwise, the base URL for the type's package is used. If that is
// also absent, the registry's default base URL is used.
func (r *MessageRegistry) AddBaseUrlForElement(baseUrl, packageOrTypeName string) {
if baseUrl[len(baseUrl)-1] == '/' {
baseUrl = baseUrl[:len(baseUrl)-1]
}
r.mu.Lock()
defer r.mu.Unlock()
if r.baseUrls == nil {
r.baseUrls = map[string]string{}
}
r.baseUrls[packageOrTypeName] = baseUrl
}
// MarshalAny wraps the given message in an Any value.
func (r *MessageRegistry) MarshalAny(m proto.Message) (*anypb.Any, error) {
var md *desc.MessageDescriptor
if dm, ok := m.(*dynamic.Message); ok {
md = dm.GetMessageDescriptor()
} else {
var err error
md, err = desc.LoadMessageDescriptorForMessage(m)
if err != nil {
return nil, err
}
}
if b, err := proto.Marshal(m); err != nil {
return nil, err
} else {
return &anypb.Any{TypeUrl: r.ComputeUrl(md), Value: b}, nil
}
}
// MessageAsPType converts the given message descriptor into a ptype.Type. Registered
// base URLs are used to compute type URLs for any fields that have message or enum
// types.
func (r *MessageRegistry) MessageAsPType(md *desc.MessageDescriptor) *typepb.Type {
fs := md.GetFields()
fields := make([]*typepb.Field, len(fs))
for i, f := range fs {
fields[i] = r.fieldAsPType(f)
}
oos := md.GetOneOfs()
oneOfs := make([]string, len(oos))
for i, oo := range oos {
oneOfs[i] = oo.GetName()
}
return &typepb.Type{
Name: md.GetFullyQualifiedName(),
Fields: fields,
Oneofs: oneOfs,
Options: r.options(md.GetOptions()),
Syntax: syntax(md.GetFile()),
SourceContext: &sourcecontextpb.SourceContext{FileName: md.GetFile().GetName()},
}
}
func (r *MessageRegistry) fieldAsPType(fd *desc.FieldDescriptor) *typepb.Field {
opts := r.options(fd.GetOptions())
// remove the "packed" option as that is represented via separate field in ptype.Field
for i, o := range opts {
if o.Name == "packed" {
opts = append(opts[:i], opts[i+1:]...)
break
}
}
var oneOf int32
if fd.AsFieldDescriptorProto().OneofIndex != nil {
oneOf = fd.AsFieldDescriptorProto().GetOneofIndex() + 1
}
var card typepb.Field_Cardinality
switch fd.GetLabel() {
case descriptorpb.FieldDescriptorProto_LABEL_OPTIONAL:
card = typepb.Field_CARDINALITY_OPTIONAL
case descriptorpb.FieldDescriptorProto_LABEL_REPEATED:
card = typepb.Field_CARDINALITY_REPEATED
case descriptorpb.FieldDescriptorProto_LABEL_REQUIRED:
card = typepb.Field_CARDINALITY_REQUIRED
}
var url string
var kind typepb.Field_Kind
switch fd.GetType() {
case descriptorpb.FieldDescriptorProto_TYPE_ENUM:
kind = typepb.Field_TYPE_ENUM
url = r.ComputeUrl(fd.GetEnumType())
case descriptorpb.FieldDescriptorProto_TYPE_GROUP:
kind = typepb.Field_TYPE_GROUP
url = r.ComputeUrl(fd.GetMessageType())
case descriptorpb.FieldDescriptorProto_TYPE_MESSAGE:
kind = typepb.Field_TYPE_MESSAGE
url = r.ComputeUrl(fd.GetMessageType())
case descriptorpb.FieldDescriptorProto_TYPE_BYTES:
kind = typepb.Field_TYPE_BYTES
case descriptorpb.FieldDescriptorProto_TYPE_STRING:
kind = typepb.Field_TYPE_STRING
case descriptorpb.FieldDescriptorProto_TYPE_BOOL:
kind = typepb.Field_TYPE_BOOL
case descriptorpb.FieldDescriptorProto_TYPE_DOUBLE:
kind = typepb.Field_TYPE_DOUBLE
case descriptorpb.FieldDescriptorProto_TYPE_FLOAT:
kind = typepb.Field_TYPE_FLOAT
case descriptorpb.FieldDescriptorProto_TYPE_FIXED32:
kind = typepb.Field_TYPE_FIXED32
case descriptorpb.FieldDescriptorProto_TYPE_FIXED64:
kind = typepb.Field_TYPE_FIXED64
case descriptorpb.FieldDescriptorProto_TYPE_INT32:
kind = typepb.Field_TYPE_INT32
case descriptorpb.FieldDescriptorProto_TYPE_INT64:
kind = typepb.Field_TYPE_INT64
case descriptorpb.FieldDescriptorProto_TYPE_SFIXED32:
kind = typepb.Field_TYPE_SFIXED32
case descriptorpb.FieldDescriptorProto_TYPE_SFIXED64:
kind = typepb.Field_TYPE_SFIXED64
case descriptorpb.FieldDescriptorProto_TYPE_SINT32:
kind = typepb.Field_TYPE_SINT32
case descriptorpb.FieldDescriptorProto_TYPE_SINT64:
kind = typepb.Field_TYPE_SINT64
case descriptorpb.FieldDescriptorProto_TYPE_UINT32:
kind = typepb.Field_TYPE_UINT32
case descriptorpb.FieldDescriptorProto_TYPE_UINT64:
kind = typepb.Field_TYPE_UINT64
}
return &typepb.Field{
Name: fd.GetName(),
Number: fd.GetNumber(),
JsonName: fd.AsFieldDescriptorProto().GetJsonName(),
OneofIndex: oneOf,
DefaultValue: fd.AsFieldDescriptorProto().GetDefaultValue(),
Options: opts,
Packed: fd.GetFieldOptions().GetPacked(),
TypeUrl: url,
Cardinality: card,
Kind: kind,
}
}
// EnumAsPType converts the given enum descriptor into a ptype.Enum.
func (r *MessageRegistry) EnumAsPType(ed *desc.EnumDescriptor) *typepb.Enum {
vs := ed.GetValues()
vals := make([]*typepb.EnumValue, len(vs))
for i, v := range vs {
vals[i] = r.enumValueAsPType(v)
}
return &typepb.Enum{
Name: ed.GetFullyQualifiedName(),
Enumvalue: vals,
Options: r.options(ed.GetOptions()),
Syntax: syntax(ed.GetFile()),
SourceContext: &sourcecontextpb.SourceContext{FileName: ed.GetFile().GetName()},
}
}
func (r *MessageRegistry) enumValueAsPType(vd *desc.EnumValueDescriptor) *typepb.EnumValue {
return &typepb.EnumValue{
Name: vd.GetName(),
Number: vd.GetNumber(),
Options: r.options(vd.GetOptions()),
}
}
// ServiceAsApi converts the given service descriptor into a ptype API description.
func (r *MessageRegistry) ServiceAsApi(sd *desc.ServiceDescriptor) *apipb.Api {
ms := sd.GetMethods()
methods := make([]*apipb.Method, len(ms))
for i, m := range ms {
methods[i] = r.methodAsApi(m)
}
return &apipb.Api{
Name: sd.GetFullyQualifiedName(),
Methods: methods,
Options: r.options(sd.GetOptions()),
Syntax: syntax(sd.GetFile()),
SourceContext: &sourcecontextpb.SourceContext{FileName: sd.GetFile().GetName()},
}
}
func (r *MessageRegistry) methodAsApi(md *desc.MethodDescriptor) *apipb.Method {
return &apipb.Method{
Name: md.GetName(),
RequestStreaming: md.IsClientStreaming(),
ResponseStreaming: md.IsServerStreaming(),
RequestTypeUrl: r.ComputeUrl(md.GetInputType()),
ResponseTypeUrl: r.ComputeUrl(md.GetOutputType()),
Options: r.options(md.GetOptions()),
Syntax: syntax(md.GetFile()),
}
}
func (r *MessageRegistry) options(options proto.Message) []*typepb.Option {
rv := reflect.ValueOf(options)
if rv.Kind() == reflect.Ptr {
if rv.IsNil() {
return nil
}
rv = rv.Elem()
}
var opts []*typepb.Option
for _, p := range proto.GetProperties(rv.Type()).Prop {
if p.Tag == 0 {
continue
}
o := r.option(p.OrigName, rv.FieldByName(p.Name))
if o != nil {
opts = append(opts, o...)
}
}
for _, ext := range proto.RegisteredExtensions(options) {
if proto.HasExtension(options, ext) {
v, err := proto.GetExtension(options, ext)
if err == nil && v != nil {
o := r.option(ext.Name, reflect.ValueOf(v))
if o != nil {
opts = append(opts, o...)
}
}
}
}
return opts
}
var typeOfBytes = reflect.TypeOf([]byte(nil))
func (r *MessageRegistry) option(name string, value reflect.Value) []*typepb.Option {
if value.Kind() == reflect.Slice && value.Type() != typeOfBytes {
// repeated field
ret := make([]*typepb.Option, value.Len())
j := 0
for i := 0; i < value.Len(); i++ {
opt := r.singleOption(name, value.Index(i))
if opt != nil {
ret[j] = opt
j++
}
}
return ret[:j]
} else {
opt := r.singleOption(name, value)
if opt != nil {
return []*typepb.Option{opt}
}
return nil
}
}
func (r *MessageRegistry) singleOption(name string, value reflect.Value) *typepb.Option {
pm := wrap(value)
if pm == nil {
return nil
}
a, err := r.MarshalAny(pm)
if err != nil {
return nil
}
return &typepb.Option{
Name: name,
Value: a,
}
}
func wrap(v reflect.Value) proto.Message {
if pm, ok := v.Interface().(proto.Message); ok {
return pm
}
if !v.IsValid() {
return nil
}
if v.Kind() == reflect.Ptr {
if v.IsNil() {
return nil
}
v = v.Elem()
}
switch v.Kind() {
case reflect.Bool:
return &wrapperspb.BoolValue{Value: v.Bool()}
case reflect.Slice:
if v.Type() != typeOfBytes {
panic(fmt.Sprintf("cannot convert/wrap %T as proto", v.Type()))
}
return &wrapperspb.BytesValue{Value: v.Bytes()}
case reflect.String:
return &wrapperspb.StringValue{Value: v.String()}
case reflect.Float32:
return &wrapperspb.FloatValue{Value: float32(v.Float())}
case reflect.Float64:
return &wrapperspb.DoubleValue{Value: v.Float()}
case reflect.Int32:
return &wrapperspb.Int32Value{Value: int32(v.Int())}
case reflect.Int64:
return &wrapperspb.Int64Value{Value: v.Int()}
case reflect.Uint32:
return &wrapperspb.UInt32Value{Value: uint32(v.Uint())}
case reflect.Uint64:
return &wrapperspb.UInt64Value{Value: v.Uint()}
default:
panic(fmt.Sprintf("cannot convert/wrap %T as proto", v.Type()))
}
}
func syntax(fd *desc.FileDescriptor) typepb.Syntax {
if fd.IsProto3() {
return typepb.Syntax_SYNTAX_PROTO3
} else {
return typepb.Syntax_SYNTAX_PROTO2
}
}
// ComputeUrl computes a type URL for element described by the given descriptor.
// The given descriptor must be an enum or message descriptor. This will use any
// registered URLs and base URLs to determine the appropriate URL for the given
// type.
//
// Deprecated: This method is deprecated due to its use of non-idiomatic naming.
// Use ComputeURL instead.
func (r *MessageRegistry) ComputeUrl(d desc.Descriptor) string {
return r.ComputeURL(d)
}
// ComputeURL computes a type URL string for the element described by the given
// descriptor. The given descriptor must be an enum or message descriptor. This
// will use any registered URLs and base URLs to determine the appropriate URL
// for the given type.
func (r *MessageRegistry) ComputeURL(d desc.Descriptor) string {
name, pkg := d.GetFullyQualifiedName(), d.GetFile().GetPackage()
r.mu.RLock()
baseUrl := r.baseUrls[name]
if baseUrl == "" {
// lookup domain for the package
baseUrl = r.baseUrls[pkg]
}
r.mu.RUnlock()
if baseUrl == "" {
baseUrl = r.defaultBaseUrl
if baseUrl == "" {
baseUrl = googleApisDomain
}
}
return fmt.Sprintf("%s/%s", baseUrl, name)
}
// Resolve resolves the given type URL into an instance of a message. This
// implements the jsonpb.AnyResolver interface, for use with marshaling and
// unmarshaling Any messages to/from JSON.
func (r *MessageRegistry) Resolve(typeUrl string) (proto.Message, error) {
md, err := r.FindMessageTypeByUrl(typeUrl)
if err != nil {
return nil, err
}
if md == nil {
return nil, fmt.Errorf("unknown message type: %s", typeUrl)
}
return r.mf.NewMessage(md), nil
}
var _ jsonpb.AnyResolver = (*MessageRegistry)(nil)