62 lines
1.5 KiB
Go
62 lines
1.5 KiB
Go
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package websvc
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import (
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"strconv"
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"time"
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"github.com/AdguardTeam/golibs/log"
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)
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// JSON Utilities
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// jsonTime is a time.Time that can be decoded from JSON and encoded into JSON
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// according to our API conventions.
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type jsonTime time.Time
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// type check
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var _ json.Marshaler = jsonTime{}
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// nsecPerMsec is the number of nanoseconds in a millisecond.
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const nsecPerMsec = float64(time.Millisecond / time.Nanosecond)
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// MarshalJSON implements the json.Marshaler interface for jsonTime. err is
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// always nil.
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func (t jsonTime) MarshalJSON() (b []byte, err error) {
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msec := float64(time.Time(t).UnixNano()) / nsecPerMsec
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b = strconv.AppendFloat(nil, msec, 'f', 3, 64)
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return b, nil
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}
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// type check
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var _ json.Unmarshaler = (*jsonTime)(nil)
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// UnmarshalJSON implements the json.Marshaler interface for *jsonTime.
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func (t *jsonTime) UnmarshalJSON(b []byte) (err error) {
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if t == nil {
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return fmt.Errorf("json time is nil")
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}
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msec, err := strconv.ParseFloat(string(b), 64)
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if err != nil {
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return fmt.Errorf("parsing json time: %w", err)
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}
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*t = jsonTime(time.Unix(0, int64(msec*nsecPerMsec)).UTC())
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return nil
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}
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// writeJSONResponse encodes v into w and logs any errors it encounters. r is
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// used to get additional information from the request.
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func writeJSONResponse(w io.Writer, r *http.Request, v interface{}) {
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err := json.NewEncoder(w).Encode(v)
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if err != nil {
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log.Error("websvc: writing resp to %s %s: %s", r.Method, r.URL.Path, err)
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}
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}
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