amuz.es/src/infra/goutils@v0.1.3/net/json/json.go (about)

     1  package json
     2  
     3  import ( 
     4  	"net/http"
     5  	json "github.com/json-iterator/go"
     6  	"bytes" 
     7  	"io"
     8  	"errors"
     9  )
    10  
    11  var (
    12  	jsonContentType = []string{"application/json; charset=utf-8"}
    13  	JSONConfig = json.ConfigFastest 
    14  	errorJsonEncoderEmpty = errors.New("empty json encoder")
    15  )
    16  func DumpJSON(w http.ResponseWriter, code int, serializable interface{}) {
    17  	// Encode
    18  	header := w.Header()
    19  	if val := header["Content-Type"]; len(val) == 0 {
    20  		header["Content-Type"] = jsonContentType
    21  	}
    22  	w.WriteHeader(code)
    23  	stream := JSONConfig.BorrowStream(w)
    24  	if stream == nil {
    25  		panic(errorJsonEncoderEmpty)
    26  	}
    27  	defer JSONConfig.ReturnStream(stream) 
    28  	stream.WriteVal(serializable) 
    29  	stream.Flush()
    30  	if stream.Error != nil {
    31  		panic(stream.Error)
    32  	}
    33  }
    34  func DumpJSONData(serializable interface{}) ([]byte, error) {
    35  	buf := bytes.Buffer{}
    36  	stream := JSONConfig.BorrowStream(&buf)
    37  	if stream == nil {
    38  		panic(errors.New("empty json encoder"))
    39  	}
    40  	defer JSONConfig.ReturnStream(stream) 
    41  	stream.WriteVal(serializable)
    42  	stream.Flush() 
    43  	return buf.Bytes(), stream.Error
    44  }
    45  func LoadJSON(data []byte, deserializable interface{}) (err error) {
    46  	iterator := JSONConfig.BorrowIterator(data)
    47  	if iterator == nil {
    48  		err = errors.New("empty json data")
    49  		return
    50  	}
    51  	defer JSONConfig.ReturnIterator(iterator) 
    52  	iterator.ReadVal(deserializable)
    53  	return iterator.Error
    54  }
    55  func LoadJSONReader(r io.Reader, deserializable interface{}) (err error) {
    56  	decoder := JSONConfig.NewDecoder(r) 
    57  	return decoder.Decode(deserializable)
    58  }