njson

High performance parsing and manipulation of JSON documents for Go.

Inspired by github.com/valyala/fastjson

Features

• Does not try to be a 'drop-in' replacement for encoding/json
• Deserialize arbitrary JSON input to a DOM tree
• Manipulate DOM tree
• Path lookups
• Lazy unescape and number conversions for faster parsing
• Reserialze to JSON data
• Iterate over tree
• Documents can be reused to avoid allocations
• Fast, fast, fast
• [WIP] Support for reflect based struct Marshal/Unmarshal via github.com/alxarch/njson/unjson package
• [WIP] CLI tool for Marshal/Unmarshal generated code via github.com/alxarch/njson/cmd/njson package

Usage

	d := njson.Document{}

	root, _, _ := d.Parse(`{"answer":42, "foo": {"bar": "baz"}}`)

	answer, _ := root.Get("answer").ToInt()
	fmt.Println(answer)

	n := root.Lookup("foo", "bar")
	bar := n.Unescaped()
	fmt.Println(bar)

	n.SetString("Hello, 世界")

	data := make([]byte, 64)
	data, _ = root.AppendJSON(data[:0])
	fmt.Println(string(data))

	// Output:
	// 42
	// baz
	// {"answer":42,"foo":{"bar":"Hello, 世界"}}