서버에서 요청한 클라이언트 인 파일을 서버에서 클라이언트로 보내려고합니다. 클라이언트가 FileRequestProtocol
의 파일을 선택하여 서버로 전송하면 서버는 파일 크기를 FileRequestProtocol
파일에 추가하고이를 클라이언트에 반환합니다.Netty.io를 사용하여 서버에서 클라이언트로 파일 보내기
클라이언트가 파이프 라인에 올바른 파일 크기의 새로운 FileChunkReqWriteHandler
을 추가합니다.
서버가 컨텍스트와 원하는 파일로 새 ChunkedFileServerHandler
을 만들고 보내려고 시도하지만 FileChunkReqWriteHandler
은 채널에서 바이트를 읽지 않습니다.
내가 뭘 잘못하고 있니?
로그인
INFO ProtocolHeadHandler:48 - Client send ProtocolHead [version=1, jobType=FILEREQUEST]
INFO ProtocolHeadServerHandler:36 - Server receive ProtocolHead [version=1, jobType=FILEREQUEST]
INFO ProtocolHeadHandler:57 - Client ProtocolHead equals, Send Protocol FileRequestProtocol [filePath=test.jpg, fileSize=0]
INFO FileRequestServerHandler:42 - Server new FileRequest FileRequestProtocol [filePath=test.jpg, fileSize=0]
INFO FileRequestHandler:41 - Client receives FileRequestProtocol [filePath=test.jpg, fileSize=174878]
INFO ChunkedFileServerHandler:39 - New ChunkedFileServerHandler
INFO FileChunkReqWriteHandler:20 - New ChunkedFile Handler FileRequestProtocol [filePath=test.jpg, fileSize=174878]
클라이언트
FileRequestHandler.java
public class FileRequestHandler extends
SimpleChannelInboundHandler<FileRequestProtocol> {
private Logger logger = Logger.getLogger(this.getClass());
public FileRequestHandler() {
}
@Override
public void channelRead0(ChannelHandlerContext ctx, FileRequestProtocol msg) {
logger.info("Client receives " + msg);
ReferenceCountUtil.release(msg);
ctx.channel().pipeline().addLast(new FileChunkReqWriteHandler(msg));
}
@Override
public void channelReadComplete(ChannelHandlerContext ctx) {
logger.info("Client read complete");
ctx.flush();
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
cause.printStackTrace();
ctx.close();
}
}
FileChunkReqWriteHandler.java
public class FileChunkReqWriteHandler extends SimpleChannelInboundHandler<ChunkedFile> {
FileRequestProtocol fileRequestProtocol;
private Logger logger = Logger.getLogger(this.getClass());
public FileChunkReqWriteHandler(FileRequestProtocol msg) {
this.fileRequestProtocol = msg;
logger.info("New ChunkedFile Handler " + msg);
}
@Override
public void channelActive(ChannelHandlerContext ctx) {
logger.info("in channel active method");
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
cause.printStackTrace();
if (ctx.channel().isActive()) {
ctx.writeAndFlush("ERR: " +
cause.getClass().getSimpleName() + ": " +
cause.getMessage() + '\n').addListener(ChannelFutureListener.CLOSE);
}
}
@Override
protected void channelRead0(ChannelHandlerContext ctx, ChunkedFile msg)
throws Exception {
logger.info("in channelRead0");
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
logger.info("channelRead");
ByteBuf buf = (ByteBuf) msg;
byte[] bytes = new byte[buf.readableBytes()];
buf.readBytes(bytes);
if(buf.readableBytes() >= this.fileRequestProtocol.getFileSize())
{
logger.info("received all data");
}
}
}
서버
FileRequestServerHandler.java
public class FileRequestServerHandler extends
SimpleChannelInboundHandler<FileRequestProtocol> {
private File f;
private Logger logger = Logger.getLogger(this.getClass());
@Override
public void channelRead0(ChannelHandlerContext ctx, FileRequestProtocol fileRequest) {
logger.info("Server new FileRequest " + fileRequest);
f = new File(fileRequest.getFilePath());
fileRequest.setFileSize(f.length());
ctx.writeAndFlush(fileRequest);
new ChunkedFileServerHandler(ctx,f);
}
@Override
public void channelReadComplete(ChannelHandlerContext ctx) {
logger.info("Server read complete");
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
cause.printStackTrace();
ctx.close();
}
}
ChunkedFileServerHandler.java
public class ChunkedFileServerHandler extends ChunkedWriteHandler {
private Logger logger = Logger.getLogger(this.getClass());
private File file;
public ChunkedFileServerHandler(ChannelHandlerContext ctx, File file) {
this.file = file;
logger.info("New ChunkedFileServerHandler");
ChunkedFile chunkedFile;
try {
chunkedFile = new ChunkedFile(this.file);
ctx.writeAndFlush(chunkedFile);
ctx.close();
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
super.channelActive(ctx);
logger.info("FILE WRITE GETS ACTIVE");
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
cause.printStackTrace();
ctx.close();
}
}
업데이트
public class ServerInitializer extends ChannelInitializer<SocketChannel> {
@Override
protected void initChannel(SocketChannel ch) throws Exception {
ChannelPipeline p = ch.pipeline();
p.addLast("encoder", new ObjectEncoder());
p.addLast("decoder",
new ObjectDecoder(ClassResolvers.cacheDisabled(null)));
p.addLast("protocolhead", new ProtocolHeadServerHandler());
p.addLast("filerequestserverhandler", new FileRequestServerHandler());
p.addLast("chunkedfileserver", new ChunkedFileServerHandler());
}
}
서버 시작
public void startUp()
{
bossGroup = new NioEventLoopGroup(1);
workerGroup = new NioEventLoopGroup();
try {
ServerBootstrap b = new ServerBootstrap();
b.group(bossGroup, workerGroup)
.channel(NioServerSocketChannel.class)
.handler(new LoggingHandler(LogLevel.INFO))
.childHandler(new ServerInitializer());
// Bind and start to accept incoming connections.
b.bind(this.port).sync().channel().closeFuture().sync();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
bossGroup.shutdownGracefully();
workerGroup.shutdownGracefully();
}
}
파이프 라인 구성을 표시 할 수 있습니까? 예를 들어 서버 측의 파이프 라인에 ChunkWriteHandler가 있습니까? –
나는이 질문에 대한 업데이트를 만들었습니다. "ChunkedFileServerHandler"가 파이프 라인에 있습니다. – jussi