bencode

Package implements Bencode encoding and decoding in Go.

Features

• Simple API.
• Clean and tested code.
• Optimized for speed.
• Dependency-free.

See docs.

Install

Go version 1.18+

go get github.com/cristalhq/bencode

Example

Marshaling into Bencode

// data to process, most of the types are supported
var data any = map[string]any{
    "1":     42,
    "hello": "world",
    "foo":   []string{"bar", "baz"},
}

buf, err := bencode.Marshal(data)
checkErr(err)
fmt.Printf("marshaled: %s\n", string(buf))

// or via Encoder:
w := &bytes.Buffer{} // or any other io.Writer
err = bencode.NewEncoder(w).Encode(data)
checkErr(err)

// Output:
// marshaled: d1:1i42e3:fool3:bar3:baze5:hello5:worlde

Unmarshaling from Bencode

var data any

buf := []byte("li1ei42ee")

err := bencode.Unmarshal(buf, &data)
checkErr(err)

// or via Decoder:
r := bytes.NewBufferString("li1ei42ee") // or any other io.Reader
err = bencode.NewDecoder(r).Decode(&data)
checkErr(err)

fmt.Printf("unmarshaled: %v\n", data)

// Output:
// unmarshaled: [1 42]

See examples: example_test.go.

License

MIT License.