MessagePack encoding for Golang
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- Documentation
- Reference
- Examples
Features
- Primitives, arrays, maps, structs, time.Time and interface{}.
- Appengine *datastore.Key and datastore.Cursor.
- CustomEncoder/CustomDecoder interfaces for custom encoding.
- Extensions to encode type information.
- Renaming fields via
msgpack:"my_field_name"and alias viamsgpack:"alias:another_name". - Omitting individual empty fields via
msgpack:",omitempty"tag or all empty fields in a struct. - Map keys sorting.
- Encoding/decoding all structs as arrays or individual structs.
- Encoder.SetCustomStructTag with Decoder.SetCustomStructTag can turn msgpack into drop-in replacement for any tag.
- Simple but very fast and efficient queries.
Installation
msgpack supports 2 last Go versions and requires support for Go modules. So make sure to initialize a Go module:
go mod init github.com/my/repoAnd then install msgpack/v5 (note v5 in the import; omitting it is a popular mistake):
go get github.com/vmihailenco/msgpack/v5Quickstart
import "github.com/vmihailenco/msgpack/v5"
func ExampleMarshal() {
type Item struct {
Foo string
}
b, err := msgpack.Marshal(&Item{Foo: "bar"})
if err != nil {
panic(err)
}
var item Item
err = msgpack.Unmarshal(b, &item)
if err != nil {
panic(err)
}
fmt.Println(item.Foo)
// Output: bar
}