1.MD5加密

 1     /// <summary>
 2     /// 使用MD5加密算法
 3     /// </summary>
 4     /// <param name="md5MessageStr">需要加密的字符串</param>
 5     /// <returns>加密后返回字符串</returns>
 6     public static string GetMD5String(string md5MessageStr)
 7     {
 8         using (MD5 md5 = new MD5CryptoServiceProvider())
 9         {
10             byte[] convertValue = Encoding.UTF8.GetBytes(md5MessageStr);
11             byte[] resultValue = md5.ComputeHash(convertValue);
12             string strResult = string.Empty;
13             for (int i = 0; i < 16; i++)
14             {
15                 strResult += resultValue[i].ToString("x2");
16             }
17             return strResult;
18         }
19     }  

2.Zlib压缩解压缩

nuget获取zlib.net

 1         using System;
 2         using System.Collections.Generic;
 3         using System.IO;
 4         using System.Linq;
 5         using System.Web;
 6         using zlib;
 7
 8         namespace LargePlatformService.Logic
 9         {
10             public class ZLibNetHelper
11             {
12                 /// <summary>
13                 /// zlib.net 解压函数
14                 /// </summary>
15                 /// <param name="strSource">带解压数据源</param>
16                 /// <returns>解压后的数据</returns>
17                 public static string DeflateDecompress(string strSource)
18                 {
19                     int data = 0;
20                     int stopByte = -1;
21                     byte[] Buffer = Convert.FromBase64String(strSource); // 解base64
22                     MemoryStream intms = new MemoryStream(Buffer);
23                     zlib.ZInputStream inZStream = new zlib.ZInputStream(intms);
24                     List<byte> inByteList = new List<byte>();
25                     int i = 0;
26                     while (stopByte != (data = inZStream.Read()))
27                     {
28                         inByteList.Add((byte)data);
29                     }
30                     inZStream.Close();
31                     return System.Text.Encoding.UTF8.GetString(inByteList.ToArray(), 0, inByteList.Count);
32
33                 }
34
35                 /// <summary>
36                 /// zlib.net 压缩函数
37                 /// </summary>
38                 /// <param name="strSource">待压缩数据</param>
39                 /// <returns>压缩后数据</returns>
40                 public static string DeflateCompress(string strSource)
41                 {
42                     MemoryStream outms = new MemoryStream();
43                     byte[] bytes = System.Text.Encoding.UTF8.GetBytes(strSource);
44                     MemoryStream inms = new MemoryStream(bytes);
45                     zlib.ZOutputStream outZStream = new zlib.ZOutputStream(outms, zlib.zlibConst.Z_DEFAULT_COMPRESSION);
46                     try
47                     {
48                         CopyStream(inms, outZStream);
49                     }
50                     catch (Exception ex)
51                     {
52                         throw ex;
53                     }
54                     finally
55                     {
56                         outZStream.Close();
57                     }
58                     return Convert.ToBase64String(outms.ToArray());
59                 }
60
61
62                 public static void CopyStream(System.IO.Stream input, System.IO.Stream output)
63                 {
64                     byte[] buffer = new byte[2000];
65                     int len;
66                     while ((len = input.Read(buffer, 0, 2000)) > 0)
67                     {
68                         output.Write(buffer, 0, len);
69                     }
70                     output.Flush();
71                 }
72             }
73         }