mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-23 18:52:11 +00:00
531 lines
15 KiB
Go
531 lines
15 KiB
Go
// Copyright 2015 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package jsonpb
|
|
|
|
import (
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"math"
|
|
"reflect"
|
|
"strconv"
|
|
"strings"
|
|
"time"
|
|
|
|
"github.com/golang/protobuf/proto"
|
|
"google.golang.org/protobuf/encoding/protojson"
|
|
protoV2 "google.golang.org/protobuf/proto"
|
|
"google.golang.org/protobuf/reflect/protoreflect"
|
|
"google.golang.org/protobuf/reflect/protoregistry"
|
|
)
|
|
|
|
const wrapJSONUnmarshalV2 = false
|
|
|
|
// UnmarshalNext unmarshals the next JSON object from d into m.
|
|
func UnmarshalNext(d *json.Decoder, m proto.Message) error {
|
|
return new(Unmarshaler).UnmarshalNext(d, m)
|
|
}
|
|
|
|
// Unmarshal unmarshals a JSON object from r into m.
|
|
func Unmarshal(r io.Reader, m proto.Message) error {
|
|
return new(Unmarshaler).Unmarshal(r, m)
|
|
}
|
|
|
|
// UnmarshalString unmarshals a JSON object from s into m.
|
|
func UnmarshalString(s string, m proto.Message) error {
|
|
return new(Unmarshaler).Unmarshal(strings.NewReader(s), m)
|
|
}
|
|
|
|
// Unmarshaler is a configurable object for converting from a JSON
|
|
// representation to a protocol buffer object.
|
|
type Unmarshaler struct {
|
|
// AllowUnknownFields specifies whether to allow messages to contain
|
|
// unknown JSON fields, as opposed to failing to unmarshal.
|
|
AllowUnknownFields bool
|
|
|
|
// AnyResolver is used to resolve the google.protobuf.Any well-known type.
|
|
// If unset, the global registry is used by default.
|
|
AnyResolver AnyResolver
|
|
}
|
|
|
|
// JSONPBUnmarshaler is implemented by protobuf messages that customize the way
|
|
// they are unmarshaled from JSON. Messages that implement this should also
|
|
// implement JSONPBMarshaler so that the custom format can be produced.
|
|
//
|
|
// The JSON unmarshaling must follow the JSON to proto specification:
|
|
// https://developers.google.com/protocol-buffers/docs/proto3#json
|
|
//
|
|
// Deprecated: Custom types should implement protobuf reflection instead.
|
|
type JSONPBUnmarshaler interface {
|
|
UnmarshalJSONPB(*Unmarshaler, []byte) error
|
|
}
|
|
|
|
// Unmarshal unmarshals a JSON object from r into m.
|
|
func (u *Unmarshaler) Unmarshal(r io.Reader, m proto.Message) error {
|
|
return u.UnmarshalNext(json.NewDecoder(r), m)
|
|
}
|
|
|
|
// UnmarshalNext unmarshals the next JSON object from d into m.
|
|
func (u *Unmarshaler) UnmarshalNext(d *json.Decoder, m proto.Message) error {
|
|
if m == nil {
|
|
return errors.New("invalid nil message")
|
|
}
|
|
|
|
// Parse the next JSON object from the stream.
|
|
raw := json.RawMessage{}
|
|
if err := d.Decode(&raw); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Check for custom unmarshalers first since they may not properly
|
|
// implement protobuf reflection that the logic below relies on.
|
|
if jsu, ok := m.(JSONPBUnmarshaler); ok {
|
|
return jsu.UnmarshalJSONPB(u, raw)
|
|
}
|
|
|
|
mr := proto.MessageReflect(m)
|
|
|
|
// NOTE: For historical reasons, a top-level null is treated as a noop.
|
|
// This is incorrect, but kept for compatibility.
|
|
if string(raw) == "null" && mr.Descriptor().FullName() != "google.protobuf.Value" {
|
|
return nil
|
|
}
|
|
|
|
if wrapJSONUnmarshalV2 {
|
|
// NOTE: If input message is non-empty, we need to preserve merge semantics
|
|
// of the old jsonpb implementation. These semantics are not supported by
|
|
// the protobuf JSON specification.
|
|
isEmpty := true
|
|
mr.Range(func(protoreflect.FieldDescriptor, protoreflect.Value) bool {
|
|
isEmpty = false // at least one iteration implies non-empty
|
|
return false
|
|
})
|
|
if !isEmpty {
|
|
// Perform unmarshaling into a newly allocated, empty message.
|
|
mr = mr.New()
|
|
|
|
// Use a defer to copy all unmarshaled fields into the original message.
|
|
dst := proto.MessageReflect(m)
|
|
defer mr.Range(func(fd protoreflect.FieldDescriptor, v protoreflect.Value) bool {
|
|
dst.Set(fd, v)
|
|
return true
|
|
})
|
|
}
|
|
|
|
// Unmarshal using the v2 JSON unmarshaler.
|
|
opts := protojson.UnmarshalOptions{
|
|
DiscardUnknown: u.AllowUnknownFields,
|
|
}
|
|
if u.AnyResolver != nil {
|
|
opts.Resolver = anyResolver{u.AnyResolver}
|
|
}
|
|
return opts.Unmarshal(raw, mr.Interface())
|
|
} else {
|
|
if err := u.unmarshalMessage(mr, raw); err != nil {
|
|
return err
|
|
}
|
|
return protoV2.CheckInitialized(mr.Interface())
|
|
}
|
|
}
|
|
|
|
func (u *Unmarshaler) unmarshalMessage(m protoreflect.Message, in []byte) error {
|
|
md := m.Descriptor()
|
|
fds := md.Fields()
|
|
|
|
if jsu, ok := proto.MessageV1(m.Interface()).(JSONPBUnmarshaler); ok {
|
|
return jsu.UnmarshalJSONPB(u, in)
|
|
}
|
|
|
|
if string(in) == "null" && md.FullName() != "google.protobuf.Value" {
|
|
return nil
|
|
}
|
|
|
|
switch wellKnownType(md.FullName()) {
|
|
case "Any":
|
|
var jsonObject map[string]json.RawMessage
|
|
if err := json.Unmarshal(in, &jsonObject); err != nil {
|
|
return err
|
|
}
|
|
|
|
rawTypeURL, ok := jsonObject["@type"]
|
|
if !ok {
|
|
return errors.New("Any JSON doesn't have '@type'")
|
|
}
|
|
typeURL, err := unquoteString(string(rawTypeURL))
|
|
if err != nil {
|
|
return fmt.Errorf("can't unmarshal Any's '@type': %q", rawTypeURL)
|
|
}
|
|
m.Set(fds.ByNumber(1), protoreflect.ValueOfString(typeURL))
|
|
|
|
var m2 protoreflect.Message
|
|
if u.AnyResolver != nil {
|
|
mi, err := u.AnyResolver.Resolve(typeURL)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
m2 = proto.MessageReflect(mi)
|
|
} else {
|
|
mt, err := protoregistry.GlobalTypes.FindMessageByURL(typeURL)
|
|
if err != nil {
|
|
if err == protoregistry.NotFound {
|
|
return fmt.Errorf("could not resolve Any message type: %v", typeURL)
|
|
}
|
|
return err
|
|
}
|
|
m2 = mt.New()
|
|
}
|
|
|
|
if wellKnownType(m2.Descriptor().FullName()) != "" {
|
|
rawValue, ok := jsonObject["value"]
|
|
if !ok {
|
|
return errors.New("Any JSON doesn't have 'value'")
|
|
}
|
|
if err := u.unmarshalMessage(m2, rawValue); err != nil {
|
|
return fmt.Errorf("can't unmarshal Any nested proto %v: %v", typeURL, err)
|
|
}
|
|
} else {
|
|
delete(jsonObject, "@type")
|
|
rawJSON, err := json.Marshal(jsonObject)
|
|
if err != nil {
|
|
return fmt.Errorf("can't generate JSON for Any's nested proto to be unmarshaled: %v", err)
|
|
}
|
|
if err = u.unmarshalMessage(m2, rawJSON); err != nil {
|
|
return fmt.Errorf("can't unmarshal Any nested proto %v: %v", typeURL, err)
|
|
}
|
|
}
|
|
|
|
rawWire, err := protoV2.Marshal(m2.Interface())
|
|
if err != nil {
|
|
return fmt.Errorf("can't marshal proto %v into Any.Value: %v", typeURL, err)
|
|
}
|
|
m.Set(fds.ByNumber(2), protoreflect.ValueOfBytes(rawWire))
|
|
return nil
|
|
case "BoolValue", "BytesValue", "StringValue",
|
|
"Int32Value", "UInt32Value", "FloatValue",
|
|
"Int64Value", "UInt64Value", "DoubleValue":
|
|
fd := fds.ByNumber(1)
|
|
v, err := u.unmarshalValue(m.NewField(fd), in, fd)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
m.Set(fd, v)
|
|
return nil
|
|
case "Duration":
|
|
v, err := unquoteString(string(in))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
d, err := time.ParseDuration(v)
|
|
if err != nil {
|
|
return fmt.Errorf("bad Duration: %v", err)
|
|
}
|
|
|
|
sec := d.Nanoseconds() / 1e9
|
|
nsec := d.Nanoseconds() % 1e9
|
|
m.Set(fds.ByNumber(1), protoreflect.ValueOfInt64(int64(sec)))
|
|
m.Set(fds.ByNumber(2), protoreflect.ValueOfInt32(int32(nsec)))
|
|
return nil
|
|
case "Timestamp":
|
|
v, err := unquoteString(string(in))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
t, err := time.Parse(time.RFC3339Nano, v)
|
|
if err != nil {
|
|
return fmt.Errorf("bad Timestamp: %v", err)
|
|
}
|
|
|
|
sec := t.Unix()
|
|
nsec := t.Nanosecond()
|
|
m.Set(fds.ByNumber(1), protoreflect.ValueOfInt64(int64(sec)))
|
|
m.Set(fds.ByNumber(2), protoreflect.ValueOfInt32(int32(nsec)))
|
|
return nil
|
|
case "Value":
|
|
switch {
|
|
case string(in) == "null":
|
|
m.Set(fds.ByNumber(1), protoreflect.ValueOfEnum(0))
|
|
case string(in) == "true":
|
|
m.Set(fds.ByNumber(4), protoreflect.ValueOfBool(true))
|
|
case string(in) == "false":
|
|
m.Set(fds.ByNumber(4), protoreflect.ValueOfBool(false))
|
|
case hasPrefixAndSuffix('"', in, '"'):
|
|
s, err := unquoteString(string(in))
|
|
if err != nil {
|
|
return fmt.Errorf("unrecognized type for Value %q", in)
|
|
}
|
|
m.Set(fds.ByNumber(3), protoreflect.ValueOfString(s))
|
|
case hasPrefixAndSuffix('[', in, ']'):
|
|
v := m.Mutable(fds.ByNumber(6))
|
|
return u.unmarshalMessage(v.Message(), in)
|
|
case hasPrefixAndSuffix('{', in, '}'):
|
|
v := m.Mutable(fds.ByNumber(5))
|
|
return u.unmarshalMessage(v.Message(), in)
|
|
default:
|
|
f, err := strconv.ParseFloat(string(in), 0)
|
|
if err != nil {
|
|
return fmt.Errorf("unrecognized type for Value %q", in)
|
|
}
|
|
m.Set(fds.ByNumber(2), protoreflect.ValueOfFloat64(f))
|
|
}
|
|
return nil
|
|
case "ListValue":
|
|
var jsonArray []json.RawMessage
|
|
if err := json.Unmarshal(in, &jsonArray); err != nil {
|
|
return fmt.Errorf("bad ListValue: %v", err)
|
|
}
|
|
|
|
lv := m.Mutable(fds.ByNumber(1)).List()
|
|
for _, raw := range jsonArray {
|
|
ve := lv.NewElement()
|
|
if err := u.unmarshalMessage(ve.Message(), raw); err != nil {
|
|
return err
|
|
}
|
|
lv.Append(ve)
|
|
}
|
|
return nil
|
|
case "Struct":
|
|
var jsonObject map[string]json.RawMessage
|
|
if err := json.Unmarshal(in, &jsonObject); err != nil {
|
|
return fmt.Errorf("bad StructValue: %v", err)
|
|
}
|
|
|
|
mv := m.Mutable(fds.ByNumber(1)).Map()
|
|
for key, raw := range jsonObject {
|
|
kv := protoreflect.ValueOf(key).MapKey()
|
|
vv := mv.NewValue()
|
|
if err := u.unmarshalMessage(vv.Message(), raw); err != nil {
|
|
return fmt.Errorf("bad value in StructValue for key %q: %v", key, err)
|
|
}
|
|
mv.Set(kv, vv)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
var jsonObject map[string]json.RawMessage
|
|
if err := json.Unmarshal(in, &jsonObject); err != nil {
|
|
return err
|
|
}
|
|
|
|
// Handle known fields.
|
|
for i := 0; i < fds.Len(); i++ {
|
|
fd := fds.Get(i)
|
|
if fd.IsWeak() && fd.Message().IsPlaceholder() {
|
|
continue // weak reference is not linked in
|
|
}
|
|
|
|
// Search for any raw JSON value associated with this field.
|
|
var raw json.RawMessage
|
|
name := string(fd.Name())
|
|
if fd.Kind() == protoreflect.GroupKind {
|
|
name = string(fd.Message().Name())
|
|
}
|
|
if v, ok := jsonObject[name]; ok {
|
|
delete(jsonObject, name)
|
|
raw = v
|
|
}
|
|
name = string(fd.JSONName())
|
|
if v, ok := jsonObject[name]; ok {
|
|
delete(jsonObject, name)
|
|
raw = v
|
|
}
|
|
|
|
field := m.NewField(fd)
|
|
// Unmarshal the field value.
|
|
if raw == nil || (string(raw) == "null" && !isSingularWellKnownValue(fd) && !isSingularJSONPBUnmarshaler(field, fd)) {
|
|
continue
|
|
}
|
|
v, err := u.unmarshalValue(field, raw, fd)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
m.Set(fd, v)
|
|
}
|
|
|
|
// Handle extension fields.
|
|
for name, raw := range jsonObject {
|
|
if !strings.HasPrefix(name, "[") || !strings.HasSuffix(name, "]") {
|
|
continue
|
|
}
|
|
|
|
// Resolve the extension field by name.
|
|
xname := protoreflect.FullName(name[len("[") : len(name)-len("]")])
|
|
xt, _ := protoregistry.GlobalTypes.FindExtensionByName(xname)
|
|
if xt == nil && isMessageSet(md) {
|
|
xt, _ = protoregistry.GlobalTypes.FindExtensionByName(xname.Append("message_set_extension"))
|
|
}
|
|
if xt == nil {
|
|
continue
|
|
}
|
|
delete(jsonObject, name)
|
|
fd := xt.TypeDescriptor()
|
|
if fd.ContainingMessage().FullName() != m.Descriptor().FullName() {
|
|
return fmt.Errorf("extension field %q does not extend message %q", xname, m.Descriptor().FullName())
|
|
}
|
|
|
|
field := m.NewField(fd)
|
|
// Unmarshal the field value.
|
|
if raw == nil || (string(raw) == "null" && !isSingularWellKnownValue(fd) && !isSingularJSONPBUnmarshaler(field, fd)) {
|
|
continue
|
|
}
|
|
v, err := u.unmarshalValue(field, raw, fd)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
m.Set(fd, v)
|
|
}
|
|
|
|
if !u.AllowUnknownFields && len(jsonObject) > 0 {
|
|
for name := range jsonObject {
|
|
return fmt.Errorf("unknown field %q in %v", name, md.FullName())
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func isSingularWellKnownValue(fd protoreflect.FieldDescriptor) bool {
|
|
if fd.Cardinality() == protoreflect.Repeated {
|
|
return false
|
|
}
|
|
if md := fd.Message(); md != nil {
|
|
return md.FullName() == "google.protobuf.Value"
|
|
}
|
|
if ed := fd.Enum(); ed != nil {
|
|
return ed.FullName() == "google.protobuf.NullValue"
|
|
}
|
|
return false
|
|
}
|
|
|
|
func isSingularJSONPBUnmarshaler(v protoreflect.Value, fd protoreflect.FieldDescriptor) bool {
|
|
if fd.Message() != nil && fd.Cardinality() != protoreflect.Repeated {
|
|
_, ok := proto.MessageV1(v.Interface()).(JSONPBUnmarshaler)
|
|
return ok
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (u *Unmarshaler) unmarshalValue(v protoreflect.Value, in []byte, fd protoreflect.FieldDescriptor) (protoreflect.Value, error) {
|
|
switch {
|
|
case fd.IsList():
|
|
var jsonArray []json.RawMessage
|
|
if err := json.Unmarshal(in, &jsonArray); err != nil {
|
|
return v, err
|
|
}
|
|
lv := v.List()
|
|
for _, raw := range jsonArray {
|
|
ve, err := u.unmarshalSingularValue(lv.NewElement(), raw, fd)
|
|
if err != nil {
|
|
return v, err
|
|
}
|
|
lv.Append(ve)
|
|
}
|
|
return v, nil
|
|
case fd.IsMap():
|
|
var jsonObject map[string]json.RawMessage
|
|
if err := json.Unmarshal(in, &jsonObject); err != nil {
|
|
return v, err
|
|
}
|
|
kfd := fd.MapKey()
|
|
vfd := fd.MapValue()
|
|
mv := v.Map()
|
|
for key, raw := range jsonObject {
|
|
var kv protoreflect.MapKey
|
|
if kfd.Kind() == protoreflect.StringKind {
|
|
kv = protoreflect.ValueOf(key).MapKey()
|
|
} else {
|
|
v, err := u.unmarshalSingularValue(kfd.Default(), []byte(key), kfd)
|
|
if err != nil {
|
|
return v, err
|
|
}
|
|
kv = v.MapKey()
|
|
}
|
|
|
|
vv, err := u.unmarshalSingularValue(mv.NewValue(), raw, vfd)
|
|
if err != nil {
|
|
return v, err
|
|
}
|
|
mv.Set(kv, vv)
|
|
}
|
|
return v, nil
|
|
default:
|
|
return u.unmarshalSingularValue(v, in, fd)
|
|
}
|
|
}
|
|
|
|
var nonFinite = map[string]float64{
|
|
`"NaN"`: math.NaN(),
|
|
`"Infinity"`: math.Inf(+1),
|
|
`"-Infinity"`: math.Inf(-1),
|
|
}
|
|
|
|
func (u *Unmarshaler) unmarshalSingularValue(v protoreflect.Value, in []byte, fd protoreflect.FieldDescriptor) (protoreflect.Value, error) {
|
|
switch fd.Kind() {
|
|
case protoreflect.BoolKind:
|
|
return unmarshalValue(in, new(bool))
|
|
case protoreflect.Int32Kind, protoreflect.Sint32Kind, protoreflect.Sfixed32Kind:
|
|
return unmarshalValue(trimQuote(in), new(int32))
|
|
case protoreflect.Int64Kind, protoreflect.Sint64Kind, protoreflect.Sfixed64Kind:
|
|
return unmarshalValue(trimQuote(in), new(int64))
|
|
case protoreflect.Uint32Kind, protoreflect.Fixed32Kind:
|
|
return unmarshalValue(trimQuote(in), new(uint32))
|
|
case protoreflect.Uint64Kind, protoreflect.Fixed64Kind:
|
|
return unmarshalValue(trimQuote(in), new(uint64))
|
|
case protoreflect.FloatKind:
|
|
if f, ok := nonFinite[string(in)]; ok {
|
|
return protoreflect.ValueOfFloat32(float32(f)), nil
|
|
}
|
|
return unmarshalValue(trimQuote(in), new(float32))
|
|
case protoreflect.DoubleKind:
|
|
if f, ok := nonFinite[string(in)]; ok {
|
|
return protoreflect.ValueOfFloat64(float64(f)), nil
|
|
}
|
|
return unmarshalValue(trimQuote(in), new(float64))
|
|
case protoreflect.StringKind:
|
|
return unmarshalValue(in, new(string))
|
|
case protoreflect.BytesKind:
|
|
return unmarshalValue(in, new([]byte))
|
|
case protoreflect.EnumKind:
|
|
if hasPrefixAndSuffix('"', in, '"') {
|
|
vd := fd.Enum().Values().ByName(protoreflect.Name(trimQuote(in)))
|
|
if vd == nil {
|
|
return v, fmt.Errorf("unknown value %q for enum %s", in, fd.Enum().FullName())
|
|
}
|
|
return protoreflect.ValueOfEnum(vd.Number()), nil
|
|
}
|
|
return unmarshalValue(in, new(protoreflect.EnumNumber))
|
|
case protoreflect.MessageKind, protoreflect.GroupKind:
|
|
err := u.unmarshalMessage(v.Message(), in)
|
|
return v, err
|
|
default:
|
|
panic(fmt.Sprintf("invalid kind %v", fd.Kind()))
|
|
}
|
|
}
|
|
|
|
func unmarshalValue(in []byte, v interface{}) (protoreflect.Value, error) {
|
|
err := json.Unmarshal(in, v)
|
|
return protoreflect.ValueOf(reflect.ValueOf(v).Elem().Interface()), err
|
|
}
|
|
|
|
func unquoteString(in string) (out string, err error) {
|
|
err = json.Unmarshal([]byte(in), &out)
|
|
return out, err
|
|
}
|
|
|
|
func hasPrefixAndSuffix(prefix byte, in []byte, suffix byte) bool {
|
|
if len(in) >= 2 && in[0] == prefix && in[len(in)-1] == suffix {
|
|
return true
|
|
}
|
|
return false
|
|
}
|
|
|
|
// trimQuote is like unquoteString but simply strips surrounding quotes.
|
|
// This is incorrect, but is behavior done by the legacy implementation.
|
|
func trimQuote(in []byte) []byte {
|
|
if len(in) >= 2 && in[0] == '"' && in[len(in)-1] == '"' {
|
|
in = in[1 : len(in)-1]
|
|
}
|
|
return in
|
|
}
|