121 lines
4.1 KiB
C#
121 lines
4.1 KiB
C#
using System;
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using System.Data;
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namespace BITKit
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{
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public class GZipHelper
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{
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/// <summary>
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/// 将传入字符串以GZip算法压缩后，返回Base64编码字符
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/// </summary>
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/// <param name="rawString">需要压缩的字符串</param>
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/// <returns>压缩后的Base64编码的字符串</returns>
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public static string GZipCompressString(string rawString)
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{
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if (string.IsNullOrEmpty(rawString) || rawString.Length == 0)
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{
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return "";
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}
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else
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{
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byte[] rawData = System.Text.Encoding.UTF8.GetBytes(rawString.ToString());
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byte[] zippedData = Compress(rawData);
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return (string)(Convert.ToBase64String(zippedData));
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}
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}
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/// <summary>
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/// GZip压缩
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/// </summary>
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/// <param name="rawData"></param>
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/// <returns></returns>
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public static byte[] Compress(byte[] rawData)
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{
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System.IO.MemoryStream ms = new System.IO.MemoryStream();
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System.IO.Compression.GZipStream compressedzipStream = new System.IO.Compression.GZipStream(ms, System.IO.Compression.CompressionMode.Compress, true);
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compressedzipStream.Write(rawData, 0, rawData.Length);
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compressedzipStream.Close();
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return ms.ToArray();
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}
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/// <summary>
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/// 解压Sring
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/// </summary>
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/// <param name="Value"></param>
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/// <returns></returns>
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public static string GetStringByString(string Value)
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{
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//DataSet ds = new DataSet();
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string CC = GZipDecompressString(Value);
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//System.IO.StringReader Sr = new System.IO.StringReader(CC);
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//ds.ReadXml(Sr);
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return CC;
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}
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/// <summary>
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/// 解压
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/// </summary>
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/// <param name="Value"></param>
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/// <returns></returns>
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public static DataSet GetDatasetByString(string Value)
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{
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DataSet ds = new DataSet();
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string CC = GZipDecompressString(Value);
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System.IO.StringReader Sr = new System.IO.StringReader(CC);
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ds.ReadXml(Sr);
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return ds;
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}
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/// <summary>
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/// 将传入的二进制字符串资料以GZip算法解压缩
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/// </summary>
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/// <param name="zippedString">经GZip压缩后的二进制字符串</param>
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/// <returns>原始未压缩字符串</returns>
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public static string GZipDecompressString(string zippedString)
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{
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if (string.IsNullOrEmpty(zippedString) || zippedString.Length == 0)
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{
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return "";
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}
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else
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{
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try
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{
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byte[] zippedData = Convert.FromBase64String(zippedString);
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return System.Text.Encoding.UTF8.GetString(Decompress(zippedData));
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}
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catch (System.Exception)
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{
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BIT4Log.Warning(zippedString);
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throw;
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}
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}
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}
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/// <summary>
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/// ZIP解压
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/// </summary>
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/// <param name="zippedData"></param>
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/// <returns></returns>
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public static byte[] Decompress(byte[] zippedData)
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{
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System.IO.MemoryStream ms = new System.IO.MemoryStream(zippedData);
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System.IO.Compression.GZipStream compressedzipStream = new System.IO.Compression.GZipStream(ms, System.IO.Compression.CompressionMode.Decompress);
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System.IO.MemoryStream outBuffer = new System.IO.MemoryStream();
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byte[] block = new byte[1024*16];
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while (true)
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{
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int bytesRead = compressedzipStream.Read(block, 0, block.Length);
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if (bytesRead <= 0)
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break;
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else
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outBuffer.Write(block, 0, bytesRead);
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}
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compressedzipStream.Close();
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return outBuffer.ToArray();
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}
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}
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}
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