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form.go
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form.go
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package form
import (
"net/url"
"reflect"
"google.golang.org/protobuf/proto"
"github.com/go-playground/form"
)
const (
// Name is form Coder name
Name = "x-www-form-urlencoded"
// Null value string
nullStr = "null"
)
var (
encoder = form.NewEncoder()
decoder = form.NewDecoder()
)
func GetCoder() Coder {
decoder.SetTagName("json")
encoder.SetTagName("json")
return Coder{encoder: encoder, decoder: decoder}
}
type Coder struct {
encoder *form.Encoder
decoder *form.Decoder
}
func (c Coder) Marshal(v interface{}) ([]byte, error) {
var vs url.Values
var err error
if m, ok := v.(proto.Message); ok {
vs, err = EncodeValues(m)
if err != nil {
return nil, err
}
} else {
vs, err = c.encoder.Encode(v)
if err != nil {
return nil, err
}
}
for k, v := range vs {
if len(v) == 0 {
delete(vs, k)
}
}
return []byte(vs.Encode()), nil
}
func (c Coder) Unmarshal(data []byte, v interface{}) error {
vs, err := url.ParseQuery(string(data))
if err != nil {
return err
}
rv := reflect.ValueOf(v)
for rv.Kind() == reflect.Ptr {
if rv.IsNil() {
rv.Set(reflect.New(rv.Type().Elem()))
}
rv = rv.Elem()
}
if m, ok := v.(proto.Message); ok {
return DecodeValues(m, vs)
}
if m, ok := rv.Interface().(proto.Message); ok {
return DecodeValues(m, vs)
}
return c.decoder.Decode(v, vs)
}
func (Coder) Name() string {
return Name
}