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78 lines
2.2 KiB
78 lines
2.2 KiB
// Package easyjson contains marshaler/unmarshaler interfaces and helper functions.
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package easyjson
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import (
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"io"
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"io/ioutil"
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"net/http"
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"strconv"
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"github.com/mailru/easyjson/jlexer"
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"github.com/mailru/easyjson/jwriter"
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)
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// Marshaler is an easyjson-compatible marshaler interface.
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type Marshaler interface {
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MarshalEasyJSON(w *jwriter.Writer)
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}
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// Marshaler is an easyjson-compatible unmarshaler interface.
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type Unmarshaler interface {
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UnmarshalEasyJSON(w *jlexer.Lexer)
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}
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// Optional defines an undefined-test method for a type to integrate with 'omitempty' logic.
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type Optional interface {
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IsDefined() bool
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}
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// Marshal returns data as a single byte slice. Method is suboptimal as the data is likely to be copied
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// from a chain of smaller chunks.
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func Marshal(v Marshaler) ([]byte, error) {
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w := jwriter.Writer{}
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v.MarshalEasyJSON(&w)
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return w.BuildBytes()
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}
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// MarshalToWriter marshals the data to an io.Writer.
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func MarshalToWriter(v Marshaler, w io.Writer) (written int, err error) {
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jw := jwriter.Writer{}
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v.MarshalEasyJSON(&jw)
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return jw.DumpTo(w)
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}
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// MarshalToHTTPResponseWriter sets Content-Length and Content-Type headers for the
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// http.ResponseWriter, and send the data to the writer. started will be equal to
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// false if an error occurred before any http.ResponseWriter methods were actually
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// invoked (in this case a 500 reply is possible).
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func MarshalToHTTPResponseWriter(v Marshaler, w http.ResponseWriter) (started bool, written int, err error) {
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jw := jwriter.Writer{}
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v.MarshalEasyJSON(&jw)
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if jw.Error != nil {
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return false, 0, jw.Error
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}
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w.Header().Set("Content-Type", "application/json")
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w.Header().Set("Content-Length", strconv.Itoa(jw.Size()))
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started = true
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written, err = jw.DumpTo(w)
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return
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}
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// Unmarshal decodes the JSON in data into the object.
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func Unmarshal(data []byte, v Unmarshaler) error {
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l := jlexer.Lexer{Data: data}
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v.UnmarshalEasyJSON(&l)
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return l.Error()
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}
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// UnmarshalFromReader reads all the data in the reader and decodes as JSON into the object.
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func UnmarshalFromReader(r io.Reader, v Unmarshaler) error {
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data, err := ioutil.ReadAll(r)
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if err != nil {
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return err
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}
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l := jlexer.Lexer{Data: data}
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v.UnmarshalEasyJSON(&l)
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return l.Error()
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}
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