Use MessagePack to compress and transmit data.

Use MessagePack to compress and transmit data.

MessagePack provides implementation methods in many languages.

Take the C # language as an example: (the code is from the MessagePack website)

Simple Packer/Unpacker BoxingPacker Example

using MsgPack; namespace Test {  public class TestApp {    public static void Main () {      BoxingPacker packer = new BoxingPacker ();      object[] obj = new object[] {        new object[] {1, 2, 3, 4},        new KeyValuePair<object, object>[] {          new KeyValuePair<object, object> (3, true),          new KeyValuePair<object, object> (5, false)        },        new object[] {3.14f, Math.PI}      };      byte[] binary = packer.Pack (obj);      object deserialized = packer.Unpack (binary);    }  }}

 

Object Packer/Unpacker

CompiledPacker can serialize public class only.

CompiledPacker

using MsgPack; namespace Test {  public class TestApp {    public static void Main () {      DataClass data = new DataClass {IntField = 1, StringField = "Hello World",                                      ArrayField = new int[]{1, 2, 3}, Private = "Private Field"};      CompiledPacker packer = new CompiledPacker (false); // serialize public field only (fastest method)      byte[] binary = packer.Pack<DataClass> (data);      DataClass data2 = packer.Unpack<DataClass> (binary);       packer = new CompiledPacker (true); // serialize all fields      binary = packer.Pack<DataClass> (data);      DataClass data3 = packer.Unpack<DataClass> (binary);       Console.WriteLine ("data :");      Console.WriteLine (data);      Console.WriteLine ();      Console.WriteLine ("data2:");      Console.WriteLine (data2);      Console.WriteLine ();      Console.WriteLine ("data3:");      Console.WriteLine (data3);      Console.WriteLine ();    }     public class DataClass    {      public int IntField;      public string StringField;      public int[] ArrayField;      string PrivateField;       public string Private {        get { return PrivateField; }        set { PrivateField = value;}      }       public override string ToString ()      {        return string.Format ("IntField = {0}\r\nStrField = {1}\r\nAryField = {2} items\r\nPrivate  = {3}",                              IntField, StringField, ArrayField == null ? 0 : ArrayField.Length, PrivateField);      }    }  }}

 

Result

data :IntField = 1StrField = Hello WorldAryField = 3 itemsPrivate  = Private Field data2:IntField = 1StrField = Hello WorldAryField = 3 itemsPrivate  = data3:IntField = 1StrField = Hello WorldAryField = 3 itemsPrivate  = Private Field

ObjectPacker (Reflection-based Packer, Slowly)

ObjectPacker can serialize private class/field.

ObjectPacker Example

using MsgPack; namespace Test {  public class TestApp {    static void Main ()    {            DataClass data = new DataClass {IntField = 1, StringField = "Hello World",                                      ArrayField = new int[]{1, 2, 3}, Private = "Private Field"};      ObjectPacker packer = new ObjectPacker ();      byte[] binary = packer.Pack (data);      DataClass data2 = packer.Unpack<DataClass> (binary);            Console.WriteLine ("data :");      Console.WriteLine (data);      Console.WriteLine ();      Console.WriteLine ("data2:");      Console.WriteLine (data2);    }     public class DataClass    {      public int IntField;      public string StringField;      public int[] ArrayField;      string PrivateField;       public string Private {        get { return PrivateField; }        set { PrivateField = value;}      }       public override string ToString ()      {        return string.Format ("IntField = {0}\r\nStrField = {1}\r\nAryField = {2} items\r\nPrivate  = {3}",                              IntField, StringField, ArrayField == null ? 0 : ArrayField.Length, PrivateField);      }    }  }}

 

Result

data :IntField = 1StrField = Hello WorldAryField = 3 itemsPrivate  = Private Field data2:IntField = 1StrField = Hello WorldAryField = 3 itemsPrivate  = Private Field

MsgPackReader/Writer

Represents a reader/writer that provides fast, non-cached, forward-only access to MessagePack stream.

MsgPackReader/MsgPackWriter Example

using MsgPack; namespace Test {  public class TestApp {    static void Main ()    {      Stream strm = new MemoryStream ();      MsgPackWriter writer = new MsgPackWriter (strm);      writer.Write (1);      writer.WriteNil ();      writer.Write (true);      writer.WriteArrayHeader (3);      writer.Write (1);      writer.Write (2);      writer.Write (3);       strm.Seek (0, SeekOrigin.Begin);      MsgPackReader reader = new MsgPackReader (strm);      while (reader.Read ()) {        Console.Write ("{0}: ", reader.Type);        if (reader.IsSigned ())          Console.WriteLine (reader.ValueSigned);        else if (reader.Type == TypePrefixes.Nil)          Console.WriteLine ("(nil)");        else if (reader.IsBoolean ())          Console.WriteLine (reader.ValueBoolean);        else if (reader.IsArray ())          Console.WriteLine ("len = {0}", reader.Length);      }    }  }}

 

Result

PositiveFixNum: 1Nil: (nil)True: TrueFixArray: len = 3PositiveFixNum: 1PositiveFixNum: 2PositiveFixNum: 3

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