Question

我正在尝试实施简单的加密聊天;顺便说一句，我在使用包装器时遇到了问题。 Cypher类运行良好，它（de）加密单字节。另外，我有CypherOutputStream和CypherInputStream类，分别扩展FilterOutputStream和FilterInputStream。它们单独运行很好，但当我尝试将CypherInputStream包裹在BufferedReader（或Scanner）周围时，它只是停止尝试读取数据。具体来说，调试代码时，BufferedReader对象似乎正确地调用了CypherInputStream对象读取。然后，它读取整个字（逐字节），但它无法正确读取行尾（然后停止读取）;所以，它继续调用CypherInputStream read()，期待一个新的字节。有任何想法吗？在此先感谢：）

以下是CypherInputStream：

import java.io.FilterInputStream;
import java.io.IOException;
import java.io.InputStream;

public class CypherInputStream extends FilterInputStream
{
    private Cypher  cypher;

    public CypherInputStream(InputStream in, Cypher c)
    {
        super(in);
        cypher = c;
    }

    @Override
    public int read() throws IOException
    {
        return cypher.decrypt((byte) in.read(););
    }

    @Override
    public int read(byte[] data, int off, int len) throws IOException
    {
        int i = -1;
        for (i = off; i < off + len; i++)
            data[i] = (byte) this.read();
        return i - off;
    }

    @Override
    public int read(byte[] data) throws IOException
    {
        return this.read(data, 0, data.length);
    }
}

下面，您可以看到处理聊天通信的CryptedChatHandler对象的主要代码行。

BufferedWriter userToSocket = new BufferedWriter(new OutputStreamWriter(
                new CypherOutputStream(socket.getOutputStream(), cypher)));
BufferedReader socketToUser = new BufferedReader(new InputStreamReader(
                new CypherInputStream(socket.getInputStream(), cypher)));
...
while (status == YOU)
    if (inFromUser.hasNextLine())
         String s = inFromUser.nextLine();
    userToSocket.write(s.concat("\r\n"));

...
while (status == OTHER)
     String s = socketToUser.readLine();
     System.out.print(s);

加密聊天 - BufferedReader的问题

0 个答案: