如何在Netty 3.3中配置WebSockets（RFC 6455）？

Question

我有來自https://github.com/netty/netty/tree/3.2/src/main/java/org/jboss/netty/example/http/websocketx/server的 WebSockets的Netty 3.3服務器

我有客戶端實現RFC 6455，但默認情況下服務器無法解碼它的消息。 在調試時，我看到使用了WebSocket08FrameDecoder（而不是WebSocket13FrameDecoder）。 當我將客戶降級到draft00時，一切正常。 如何配置Netty以解碼RFC 6455消息？

更新

客戶端發送此握手包：

GET /websocket HTTP/1.1
Upgrade: WebSocket
Connection: Upgrade
Sec-WebSocket-Version: 13
Sec-WebSocket-Key: 5a087
Host: 127.0.0.1
Origin: 127.0.0.1

並且服務器上的握手是WebSocketServerHandshaker13 ，但我仍然得到錯誤：

org.jboss.netty.handler.codec.frame.CorruptedFrameException: unmasked client to server frame
at org.jboss.netty.handler.codec.http.websocketx.WebSocket08FrameDecoder.protocolViolation(WebSocket08FrameDecoder.java:350)
at org.jboss.netty.handler.codec.http.websocketx.WebSocket08FrameDecoder.decode(WebSocket08FrameDecoder.java:138)
at org.jboss.netty.handler.codec.http.websocketx.WebSocket08FrameDecoder.decode(WebSocket08FrameDecoder.java:56)
at org.jboss.netty.handler.codec.replay.ReplayingDecoder.callDecode(ReplayingDecoder.java:465)
at org.jboss.netty.handler.codec.replay.ReplayingDecoder.messageReceived(ReplayingDecoder.java:438)
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:343)
at org.jboss.netty.channel.socket.nio.NioWorker.processSelectedKeys(NioWorker.java:274)
at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:194)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)`

Answer 1

如果您查看WebSocketServerHandshakerFactory ，它會根據HTTP標頭中傳遞的Web套接字版本實例化解碼器。

 public WebSocketServerHandshaker newHandshaker(HttpRequest req) {

    String version = req.getHeader(Names.SEC_WEBSOCKET_VERSION);
    if (version != null) {
        if (version.equals(WebSocketVersion.V13.toHttpHeaderValue())) {
            // Version 13 of the wire protocol - RFC 6455 (version 17 of the draft hybi specification).
            return new WebSocketServerHandshaker13(webSocketURL, subprotocols, allowExtensions);
        } else if (version.equals(WebSocketVersion.V08.toHttpHeaderValue())) {
            // Version 8 of the wire protocol - version 10 of the draft hybi specification.
            return new WebSocketServerHandshaker08(webSocketURL, subprotocols, allowExtensions);
        } else {
            return null;
        }
    } else {
        // Assume version 00 where version header was not specified
        return new WebSocketServerHandshaker00(webSocketURL, subprotocols);
    }
}

請檢查您的客戶端實現，以查看它在HTTP標頭中發送的版本。 它應該是Sec-WebSocket-Version: 13 。