如何从CompositeChannelBuffer中读取？

Question

在我测试期间，我正在从浏览器加载JPG图像，基于netty的littleproxy位于服务器和客户端之间。在加载此特定图像时。通道缓冲区是CompositChannelBuffer。我正在阅读以下方式，但无法正常工作。

if (chanBuff instanceof CompositeChannelBuffer) {

    CompositeChannelBuffer compChanBuf = ((CompositeChannelBuffer) chanBuff);

    int noOfComps = compChanBuf.numComponents();
    List<ChannelBuffer> buffList = compChanBuf.decompose(0, noOfComps);

    ListIterator<ChannelBuffer> itr = buffList.listIterator();
    int offSet = 0;
    int bytesRead = -1;

    while (itr.hasNext()) {
        ChannelBuffer buf = (ChannelBuffer) itr.next();
        bytesRead = buf.array().length;
        outputStream.write(buf.array(), offSet, bytesRead);
        offSet += bytesRead;
    }
}

我也试过下面的代码，但这也无法写入文件。

if (chanBuff instanceof CompositeChannelBuffer){

    FileOutputStream outputStream = new FileOutputStream(outputFileName);

    CompositeChannelBuffer compChanBuf = ((CompositeChannelBuffer) chanBuff);
    int noOfComps = compChanBuf.numComponents();

    compChanBuf.getBytes(0, outputStream, noOfComps);

    ChannelBuffer dynamicBuf = dynamicBuffer();
    compChanBuf.getBytes(0, dynamicBuf);
    array = dynamicBuf.array();

    outputStream.write(array);
}

阅读CompositChannelBuffer的正确方法是什么？

Answer 1

就像你为其他缓冲区做的那样：

ChannelBuffer buf = ...
OutputStream out = ...
buf.getBytes(0, out, buf.readableBytes());