c# - 如何让 StreamReader.ReadLine() 区分 "\r\n"和 "\n"？

Question

我创建了一个函数，它使用 StreamReader 和 TcpClient 接收分 block 的 HTTP 包。 这是我创建的:

    private string recv()
    {
        Thread.Sleep(Config.ApplicationClient.WAIT_INTERVAL);

        string result = String.Empty;
        string line = reader.ReadLine();

        result += line + "\n";

        while (line.Length > 0)
        {
            line = reader.ReadLine();
            result += line + "\n";
        }

        for (int size = -1, total = 0; size != 0; total = 0)
        {
            line = reader.ReadLine();
            size = PacketAnalyzer.parseHex(line);

            while (total < size)
            {
                line = reader.ReadLine();
                result += line + "\n";
                int i = encoding.GetBytes(line).Length;
                total += i + 2; //this part assumes that line break is caused by "\r\n", which is not always the case
            }
        }

        reader.DiscardBufferedData();

        return result;
    }

对于它读取的每个新行，它都会将额外的长度 2 添加到 total，假设新行是由“\r\n”创建的。这适用于几乎所有情况，除非数据包含“\n”，我不知道如何将它与“\r\n”区分开来。对于这种情况，它会认为它读取的内容比实际读取的内容多，因此会缩短读取一个 block 并将 PacketAnalyzer.parseHex() 暴露给错误。

Answer 1

(在问题编辑中回答。转换为社区维基答案。参见 What is the appropriate action when the answer to a question is added to the question itself?)

OP 写道:

SOLVED: I made the following two line-reading and stream-emptying functions and I'm back on track again.

NetworkStream ns;

//.....

private void emptyStreamBuffer()
{
    while (ns.DataAvailable)
        ns.ReadByte();
}

private string readLine()
{
    int i = 0; 
    for (byte b = (byte) ns.ReadByte(); b != '\n'; b = (byte) ns.ReadByte())
        buffer[i++] = b;

    return encoding.GetString(buffer, 0, i);
}