87 lines
3.4 KiB
Markdown
87 lines
3.4 KiB
Markdown
# MessagePack encoding for Golang
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[](https://travis-ci.org/vmihailenco/msgpack)
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[](https://pkg.go.dev/github.com/vmihailenco/msgpack/v5)
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[](https://msgpack.uptrace.dev/)
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[](https://discord.gg/rWtp5Aj)
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> :heart:
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> [**Uptrace.dev** - All-in-one tool to optimize performance and monitor errors & logs](https://uptrace.dev/?utm_source=gh-msgpack&utm_campaign=gh-msgpack-var2)
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- Join [Discord](https://discord.gg/rWtp5Aj) to ask questions.
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- [Documentation](https://msgpack.uptrace.dev)
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- [Reference](https://pkg.go.dev/github.com/vmihailenco/msgpack/v5)
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- [Examples](https://pkg.go.dev/github.com/vmihailenco/msgpack/v5#pkg-examples)
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Other projects you may like:
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- [Bun](https://bun.uptrace.dev) - fast and simple SQL client for PostgreSQL, MySQL, and SQLite.
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- [BunRouter](https://bunrouter.uptrace.dev/) - fast and flexible HTTP router for Go.
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## Features
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- Primitives, arrays, maps, structs, time.Time and interface{}.
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- Appengine \*datastore.Key and datastore.Cursor.
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- [CustomEncoder]/[CustomDecoder] interfaces for custom encoding.
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- [Extensions](https://pkg.go.dev/github.com/vmihailenco/msgpack/v5#example-RegisterExt) to encode
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type information.
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- Renaming fields via `msgpack:"my_field_name"` and alias via `msgpack:"alias:another_name"`.
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- Omitting individual empty fields via `msgpack:",omitempty"` tag or all
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[empty fields in a struct](https://pkg.go.dev/github.com/vmihailenco/msgpack/v5#example-Marshal-OmitEmpty).
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- [Map keys sorting](https://pkg.go.dev/github.com/vmihailenco/msgpack/v5#Encoder.SetSortMapKeys).
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- Encoding/decoding all
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[structs as arrays](https://pkg.go.dev/github.com/vmihailenco/msgpack/v5#Encoder.UseArrayEncodedStructs)
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or
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[individual structs](https://pkg.go.dev/github.com/vmihailenco/msgpack/v5#example-Marshal-AsArray).
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- [Encoder.SetCustomStructTag] with [Decoder.SetCustomStructTag] can turn msgpack into drop-in
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replacement for any tag.
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- Simple but very fast and efficient
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[queries](https://pkg.go.dev/github.com/vmihailenco/msgpack/v5#example-Decoder.Query).
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[customencoder]: https://pkg.go.dev/github.com/vmihailenco/msgpack/v5#CustomEncoder
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[customdecoder]: https://pkg.go.dev/github.com/vmihailenco/msgpack/v5#CustomDecoder
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[encoder.setcustomstructtag]:
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https://pkg.go.dev/github.com/vmihailenco/msgpack/v5#Encoder.SetCustomStructTag
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[decoder.setcustomstructtag]:
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https://pkg.go.dev/github.com/vmihailenco/msgpack/v5#Decoder.SetCustomStructTag
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## Installation
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msgpack supports 2 last Go versions and requires support for
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[Go modules](https://github.com/golang/go/wiki/Modules). So make sure to initialize a Go module:
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```shell
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go mod init github.com/my/repo
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```
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And then install msgpack/v5 (note _v5_ in the import; omitting it is a popular mistake):
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```shell
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go get github.com/vmihailenco/msgpack/v5
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```
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## Quickstart
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```go
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import "github.com/vmihailenco/msgpack/v5"
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func ExampleMarshal() {
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type Item struct {
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Foo string
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}
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b, err := msgpack.Marshal(&Item{Foo: "bar"})
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if err != nil {
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panic(err)
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}
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var item Item
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err = msgpack.Unmarshal(b, &item)
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if err != nil {
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panic(err)
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}
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fmt.Println(item.Foo)
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// Output: bar
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}
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```
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