github.com/sagernet/sing@v0.4.0-beta.19.0.20240518125136-f67a0988a636/common/json/badjson/json.go (about)

     1  package badjson
     2  
     3  import (
     4  	"bytes"
     5  
     6  	E "github.com/sagernet/sing/common/exceptions"
     7  	"github.com/sagernet/sing/common/json"
     8  )
     9  
    10  func Decode(content []byte) (any, error) {
    11  	decoder := json.NewDecoder(bytes.NewReader(content))
    12  	return decodeJSON(decoder)
    13  }
    14  
    15  func decodeJSON(decoder *json.Decoder) (any, error) {
    16  	rawToken, err := decoder.Token()
    17  	if err != nil {
    18  		return nil, err
    19  	}
    20  	switch token := rawToken.(type) {
    21  	case json.Delim:
    22  		switch token {
    23  		case '{':
    24  			var object JSONObject
    25  			err = object.decodeJSON(decoder)
    26  			if err != nil {
    27  				return nil, err
    28  			}
    29  			rawToken, err = decoder.Token()
    30  			if err != nil {
    31  				return nil, err
    32  			} else if rawToken != json.Delim('}') {
    33  				return nil, E.New("excepted object end, but got ", rawToken)
    34  			}
    35  			return &object, nil
    36  		case '[':
    37  			var array JSONArray
    38  			err = array.decodeJSON(decoder)
    39  			if err != nil {
    40  				return nil, err
    41  			}
    42  			rawToken, err = decoder.Token()
    43  			if err != nil {
    44  				return nil, err
    45  			} else if rawToken != json.Delim(']') {
    46  				return nil, E.New("excepted array end, but got ", rawToken)
    47  			}
    48  			return array, nil
    49  		default:
    50  			return nil, E.New("excepted object or array end: ", token)
    51  		}
    52  	}
    53  	return rawToken, nil
    54  }