add: experimental logparser v6

logparser/v6/parse/json.go

@@ -0,0 +1,55 @@
+// For more tutorials: https://bj.learngoprogramming.com
+//
+// Copyright © 2018 Inanc Gumus
+// Learn Go Programming Course
+// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
+//
+
+package parse
+
+import (
+	"encoding/json"
+	"io"
+)
+
+// JSONParser parses json records.
+type JSONParser struct {
+	in   *json.Decoder
+	err  error   // last error
+	last *Record // last parsed record
+}
+
+// JSON creates a json parser.
+func JSON(r io.Reader) *JSONParser {
+	return &JSONParser{
+		in:   json.NewDecoder(r),
+		last: new(Record),
+	}
+}
+
+// Parse the next line.
+func (p *JSONParser) Parse() bool {
+	if p.err != nil {
+		return false
+	}
+
+	p.last.Reset()
+	err := p.in.Decode(&p.last)
+	if err == io.EOF {
+		return false
+	}
+
+	p.err = err
+
+	return err == nil
+}
+
+// Value returns the most recent record parsed by a call to Parse.
+func (p *JSONParser) Value() Record {
+	return *p.last
+}
+
+// Err returns the first error that was encountered by the Log.
+func (p *JSONParser) Err() error {
+	return p.err
+}