GZipStream，如何正确地从GZipStream读取

Question

我用C#写了一些代码

        string host = new Uri(_url).Host;
        IPHostEntry ipAddress = Dns.GetHostEntry(host);
        IPEndPoint ip = new IPEndPoint(ipAddress.AddressList[0], 80);
        using (Socket s = new Socket(ip.AddressFamily, SocketType.Stream, ProtocolType.Tcp))
        {
            s.Connect(ip);
            using (NetworkStream n = new NetworkStream(s))
            {
                    byte[] write = encoding.GetBytes(HttpQuery);
                    n.Write(write, 0, write.Length);
                    ReadLine(n);
                    Dictionary<string, string> headers = new Dictionary<string, string>();
                    while (true)
                    {
                        string line = ReadLine(n);
                        if (line.Length == 0)
                        {
                            break;
                        }
                        int index = line.IndexOf(':');
                        if (!headers.ContainsKey(line.Substring(0, index)))
                        {
                            headers.Add(line.Substring(0, index), line.Substring(index + 2));
                        }
                    }

                    string contentEncoding;
                    if (headers.TryGetValue("Content-Encoding", out contentEncoding))
                    {
                        Stream responseStream = n;
                        if (contentEncoding.Equals("gzip"))
                        {
                            responseStream = new GZipStream(responseStream, CompressionMode.Decompress);
                            responseStream.Flush();
                        }
                        else if (contentEncoding.Equals("deflate"))
                        {
                            responseStream = new DeflateStream(responseStream, CompressionMode.Decompress);
                        }

                        MemoryStream memStream = new MemoryStream();

                        byte[] respBuffer = new byte[4096];
                        try
                        {
                            int bytesRead = responseStream.Read(respBuffer, 0, respBuffer.Length);
                            //int bytesRead = responseStream.ReadByte();
                            while (bytesRead > 0)
                            {
                                memStream.Write(respBuffer, 0, bytesRead);
                                bytesRead = responseStream.Read(respBuffer, 0, respBuffer.Length);
                            }
                        }
                        finally
                        {
                            responseStream.Close();
                        }
                        string str = encoding.GetString(memStream.ToArray());

然后在这一行中有一个异常InvalidDataException：int bytesRead = responseStream.Read(respBuffer，0，respBuffer.Length);

GZip头幻数不正确。

    string ReadLine(Stream stream)
    {
        List<byte> lineBuffer = new List<byte>();
        try
        {
            while (true)
            {
                int b = stream.ReadByte();
                if (b == -1)
                    return null;
                if (b == 10)
                    break;
                if (b != 13)
                    lineBuffer.Add((byte) b);
            }
        }
        catch (Exception)
        {
        }
        return encoding.GetString(lineBuffer.ToArray());
    }

有什么想法吗？

Answer 1

当读取空行时，您的ReadLine函数一读取一行提要字符就会返回。这是否可能使流定位于回车字符，而不是位于GZip数据流的开头？

Answer 2

一般来说，我在这个主题上找到了一些东西，这里是Sockets in C#: How to get the response stream?链接，在字符串之前有一些信息可以这样做：

                        Stream responseStream = n;
                        int magicNumber = 0;
                        while (magicNumber != 10)
                        {
                            magicNumber = responseStream.ReadByte();
                        }
                        if (contentEncoding.Equals("gzip"))
                        {
                            responseStream = new GZipStream(responseStream, CompressionMode.Decompress);
                        }

也许我做得不太正确？

nobugz我用WttWebRequest和HttpWebResponse编写了非常简洁的代码，但是我的页面有代码页- 1251，HttpWebRequest将url从1251编码转换为utf-8i，这与此无关，也许您有什么想法吗？

例如，我使用url作为

HttpWebRequest将此转换为 (UTF-8)

但是将会是(windows-1251)，我不知道如何解决这个问题