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MsgPack Serializer & Deserializer for Swift

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<img src="https://raw.githubusercontent.com/malcommac/SwiftMsgPack/develop/logo.png" width=210px height=204px alt="SwiftMsgPack" title="SwiftMsgPack">

Carthage compatible CI Status Version License Platform

<p align="center" >MsgPack for Swift... Its' like JSON <a href="http://theburningmonk.com/2011/12/performance-test-binary-serializers-part-ii/"> but faster</a><br/>
Made with ♥ in pure Swift, no dependencies, lightweight & fully portable
<p align="center" >★★ <b>Star our github repository to help us!</b> ★★</p>
<p align="center" >Created by <a href="http://www.danielemargutti.com">Daniele Margutti</a> (<a href="http://www.twitter.com/danielemargutti">@danielemargutti</a>)</p>

MessagePack is an efficient binary serialization format, which lets you exchange data among multiple languages like JSON, except that it's faster and smaller. Small integers are encoded into a single byte while typical short strings require only one extra byte in addition to the strings themselves.
You can read more about specs directly from the main web site.

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Current Release

Latest release is: 0.9.1 Download here.
A complete list of changes for each release is available in the CHANGELOG file.

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How to use: one-shot pack & unpack

Both serialization and deseralization happens inside a Data object.

In order to pack one or more objects you need to create an empty Data instance and call pack by passing the object(s) you want to serialize.
It's pretty easy, take a look here:

var data = Data()
do {
    let obj1 = "Hello World"
    let obj2 = 45.5
    let obj3: [AnyHashable:Any?] = [ "key_1" : "value test","key_2" : 4,"key_3" : true, otherHashableKey: "value1"]
    // Now you can pack your instances by passing them to pack function
    try data.pack(obj1,obj2,obj3)
} catch {
    print("Something went wrong while packing data: \(error)")  

Deserializing data is pretty simple too, just call unpack function to an instance of Data with msgpack data:

let data: Data = // msgpack data...
do {
  let decodedObj: Any? = try data.unpack()
} catch {
    print("Something went wrong while unpacking data: \(error)")    

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Supported Types

SwiftMsgPack supports the following Swift types:
- String
- Data
- Bool
- nil
- Numeric values: Int & UInt (UInt8,Int8,UInt16,Int16,UInt32,Int32,UInt64,Int64), Float and Double
- Dictionaries ([AnyHashable:Any?])
- Array ([Any?])

The following limitations are specified by MsgPack specs format:

  • a value of an Integer object is limited from -(2^63) upto (2^64)-1
  • maximum length of a Binary object is (2^32)-1
  • maximum byte size of a String object is (2^32)-1
  • String objects may contain invalid byte sequence and the behavior of a deserializer depends on the actual implementation when it received invalid byte sequence
    • Deserializers should provide functionality to get the original byte array so that applications can decide how to handle the object
  • maximum number of elements of an Array object is (2^32)-1
  • maximum number of key-value associations of a Map object is (2^32)-1

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You can install Swiftline using CocoaPods, carthage and Swift package manager


pod 'SwiftMsgPack'


github 'malcommac/SwiftMsgPack'

Swift Package Manager

Add swiftline as dependency in your Package.swift

  import PackageDescription

  let package = Package(name: "YourPackage",
    dependencies: [
      .Package(url: "https://github.com/malcommac/SwiftMsgPack.git", majorVersion: 0),

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SwiftMsgPack has an extensive coverage using XCTest.
You can found a complete list of tests inside Tests/SwiftMsgPackTests folder.
Tests can also be runned with XCode using the SwiftMsgPack project.

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Current version is compatible with:

  • Swift 3.0+
  • iOS 9.0 or later
  • tvOS 9.0 or later
  • macOS 10.10 or later
  • Linux compatible environments

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Credits & License

SwiftMsgPack is owned and maintained by Daniele Margutti.

As open source creation any help is welcome!

The code of this library is licensed under MIT License; you can use it in commercial products without any limitation.

The only requirement is to add a line in your Credits/About section with the text below:

This software uses open source SwiftMsgPack's library to manage MsgPack data.
Web: http://github.com/malcommac/SwiftMsgPack.
Created by Daniele Margutti and licensed under MIT License.


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