zlib.Net的压缩和解压缩问题

本文关键字：解压缩 问题 压缩 Net zlib | 更新日期: 2023-09-27 18:01:27

我正在使用ZLIB。Net，我不明白我该怎么压缩一个不是FileStream，而是MemoryStream的流。通过:

byte[] buffer = ASCIIEncoding.ASCII.GetBytes("Hello World");
MemoryStream outStream = new MemoryStream();
zlib.ZOutputStream outZStream = new zlib.ZOutputStream(
    outStream,
    zlib.zlibConst.Z_BEST_COMPRESSION);
outZStream.Write(buffer, 0, buffer.Length);
outZStream.finish();
buffer = outStream.GetBuffer();
Debug.WriteLine(DateTime.Now.ToString() + ":" + buffer.Length);
MemoryStream inStream = new MemoryStream(buffer);
MemoryStream mo = new MemoryStream();
zlib.ZInputStream inZStream = new zlib.ZInputStream(
    inStream,
    zlib.zlibConst.Z_BEST_COMPRESSION);
int n = 0;
while ((n = inZStream.Read(buffer, 0, buffer.Length)) > 0)
{
    mo.Write(buffer, 0, n);
}
string STR = ASCIIEncoding.ASCII.GetString(mo.GetBuffer());

我不能得到字符串"Hello World"。

zlib.Net的压缩和解压缩问题

感谢用户@longbkit提供的参考答案(由@JoshStribling提供)，帮助我解决了这个问题。

public static void CompressData(byte[] inData, out byte[] outData)
{
    using (MemoryStream outMemoryStream = new MemoryStream())
    using (ZOutputStream outZStream = new ZOutputStream(outMemoryStream, zlibConst.Z_DEFAULT_COMPRESSION))
    using (Stream inMemoryStream = new MemoryStream(inData))
    {
        CopyStream(inMemoryStream, outZStream);
        outZStream.Finish();
        outData = outMemoryStream.ToArray();
    }
}
public static void DecompressData(byte[] inData, out byte[] outData)
{
    using (MemoryStream outMemoryStream = new MemoryStream())
    using (ZOutputStream outZStream = new ZOutputStream(outMemoryStream))
    using (Stream inMemoryStream = new MemoryStream(inData))
    {
        CopyStream(inMemoryStream, outZStream);
        outZStream.Finish();
        outData = outMemoryStream.ToArray();
    }
}
public static void CopyStream(System.IO.Stream input, System.IO.Stream output)
{
    byte[] buffer = new byte[2000];
    int len;
    while ((len = input.Read(buffer, 0, 2000)) > 0)
    {
        output.Write(buffer, 0, len);
    }
    output.Flush();
}

它的工作原理。但是我看到的是压缩和解压缩之间的唯一区别是压缩类型在ZOutput构造函数…

神奇。对我来说，如果压缩被称为输出，而解压-输入会更清楚。或者这样的…

更改代码

inZStream.Read

- ->inZStream.read

from sourceCode in ZInputStream.cs

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