java - 简单的 Netty 处理程序，逐字节遍历消息

Question

是否有一个非常准系统的 Netty 处理程序的示例，它只是获取在线路上发送的任何数据并将其写入文件？

我在想一些类似的事情:

public class SimpleHandler extends SimpleChannelUpstreamHandler {

public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
        HttpRequest request = (HttpRequest) e.getMessage();
        // get data from request and write to a file
}

有什么想法吗？感谢您的任何想法

Answer 1

您也可以只使用此方法将 ChannelBuffer 的内容传输到 OutputStream:

http://netty.io/docs/stable/api/org/jboss/netty/buffer/ChannelBuffer.html#readBytes(java.io.OutputStream,%20int )

所以像这样:

public class FileWriterHandler extends SimpleChannelHandler {
    private final String filename;

    public FileWriterHandler(String filename) {
        this.filename = filename;
    }

    @Override
    public void messageReceived(ChannelHandlerContext context, MessageEvent event) throws Exception{
        ChannelBuffer buffer = (ChannelBuffer)event.getMessage();
        FileOutputStream out = null;
        try {
            out = new FileOutputStream(filename, true)
            buffer.readBytes(out, buffer.readableBytes());
        } finally {
            if (out != null) out.close();
        }
    }
}