1 using System;
2 using System.Collections.Generic;
3 using System.IO;
4 using System.IO.Compression;
5 using System.Linq;
6 using System.Text;
7 using System.Runtime.Serialization.Formatters.Binary;
8
9 namespace Kingge.Mini.Network
10 {
11 /// <summary>
12 /// 压缩工具类,可以用于减小流量,提升传输效率
13 /// </summary>
14 public static class DeflateUtil
15 {
16 /// <summary>
17 /// 还原对象信息
18 /// </summary>
19 /// <param name="bytes">字节数组</param>
20 public static object GetObject(byte[] bytes)
21 {
22 if (bytes==null||bytes.Length==0)
23 {
24 return null;
25 }
26 using (MemoryStream memory=new MemoryStream(bytes))
27 {
28 int first=memory.ReadByte();
29 //判断标记位,0直接还原,1先解压再还原
30 if (first == 0)
31 {
32 BinaryFormatter formatter = new BinaryFormatter();
33 return formatter.Deserialize(memory);
34 }
35 else
36 {
37 using (DeflateStream deflate=new DeflateStream(memory,CompressionMode.Decompress,true))
38 {
39 BinaryFormatter formatter = new BinaryFormatter();
40 return formatter.Deserialize(deflate);
41 }
42 }
43 }
44 }
45
46 /// <summary>
47 /// 压缩对象
48 /// </summary>
49 /// <param name="obj">被压缩对象</param>
50 public static byte[] DeflateObject(object obj)
51 {
52 if (obj==null)
53 {
54 return null;
55 }
56 //值类型或者字符串没有压缩的必要
57 if (obj.GetType().IsValueType||obj is string)
58 {
59 using (MemoryStream memory=new MemoryStream())
60 {
61 //写入标记位0,表示未经过压缩
62 memory.WriteByte((byte)0);
63 BinaryFormatter formatter = new BinaryFormatter();
64 formatter.Serialize(memory,obj);
65 memory.Position = 0;
66 return memory.ToArray();
67 }
68 }
69 else
70 {
71 using (MemoryStream memory = new MemoryStream())
72 {
73 //写入标记位1，表示经过压缩
74 memory.WriteByte((byte)1);
75 using (DeflateStream deflate=new DeflateStream(memory,CompressionMode.Compress,true))
76 {
77 BinaryFormatter formatter = new BinaryFormatter();
78 formatter.Serialize(deflate, obj);
79 }
80 memory.Position = 0;
81 return memory.ToArray();
82 }
83 }
84 }
85 }
86 }
