压缩和utf8编码

Question

谁能告诉我为什么我在这个过程中丢失信息？有些utf8字符似乎没有被解码: "Biography":"\u003clink type=...或者Steve Blunt \u0026 Marty Kelley 其他人做:"Name":"??

// Creating a 64bit string containing gzip data
string bar;
using (MemoryStream ms = new MemoryStream())
{
    using (GZipStream gzip = new GZipStream(ms, CompressionMode.Compress))
    using (StreamWriter writer = new StreamWriter(gzip, System.Text.Encoding.UTF8))
    {
        writer.Write(s);
    }
    ms.Flush();
    bar = Convert.ToBase64String(ms.ToArray());
}

// Reading it
string foo;
byte[] itemData = Convert.FromBase64String(bar);
using (MemoryStream src = new MemoryStream(itemData))
using (GZipStream gzs = new GZipStream(src, CompressionMode.Decompress))
using (MemoryStream dest = new MemoryStream(itemData.Length*2))
{
    gzs.CopyTo(dest);
    foo = Encoding.UTF8.GetString(dest.ToArray());
}

Console.WriteLine(foo);

Answer 1

这可能是因为您正在使用 和 来编写字符串，StreamWriter但使用CopyTo()和来读取它Encoding.GetString()。

如果你尝试这样做会发生什么？

// Reading it
string foo;
byte[] itemData = Convert.FromBase64String(bar);
using (MemoryStream src = new MemoryStream(itemData))
using (GZipStream gzs = new GZipStream(src, CompressionMode.Decompress))
using (StreamReader reader = new StreamReader(gzs, Encoding.UTF8))
{
    foo = reader.ReadLine();
}

虽然我认为你应该使用BinaryReaderand BinaryWriter：

string s = "Biography:\u003clink type...";
string bar;
using (MemoryStream ms = new MemoryStream())
{
    using (GZipStream gzip = new GZipStream(ms, CompressionMode.Compress))
    using (var writer = new BinaryWriter(gzip, Encoding.UTF8))
    {
        writer.Write(s);
    }
    ms.Flush();
    bar = Convert.ToBase64String(ms.ToArray());
}

// Reading it
string foo;
byte[] itemData = Convert.FromBase64String(bar);
using (MemoryStream src = new MemoryStream(itemData))
using (GZipStream gzs = new GZipStream(src, CompressionMode.Decompress))
using (var reader = new BinaryReader(gzs, Encoding.UTF8))
{
    foo = reader.ReadString();
}

Console.WriteLine(foo);