io.netty.handler.codec.http.websocketx.WebSocketHandshakeExc

Question

我用与Websockets通信的Netty编写了一个服务器。

我经常收到此错误：

io.netty.handler.codec.http.websocketx.WebSocketHandshakeException: not a WebSoc
ket handshake request: missing upgrade
        at io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker00.ne
wHandshakeResponse(WebSocketServerHandshaker00.java:114)
        at io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.hand
shake(WebSocketServerHandshaker.java:161)
        at io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker.hand
shake(WebSocketServerHandshaker.java:136)
        at chatserver.ChatServerHandler.handleHttpRequest(ChatServerHandler.java
:222)
   ....

ChatServerHandler 的第 222 行在这里：

private void handleHttpRequest(ChannelHandlerContext ctx, FullHttpRequest req) throws Exception 
{
   ...
     WebSocketServerHandshakerFactory wsFactory = new WebSocketServerHandshakerFactory(
                getWebSocketLocation(req), null, false);
        handshaker = wsFactory.newHandshaker(req);
        if (handshaker == null) {
            WebSocketServerHandshakerFactory.sendUnsupportedVersionResponse(ctx.channel());// .sendUnsupportedVersionResponse(ctx.channel());
        } else {
            handshaker.handshake(ctx.channel(), req); // <<< this is line 222
        }
   ...
}

我能做些什么来修复它？

编辑：顺便说一下，我正在使用Netty 4.0.15 final决赛。

Answer 1

我怀疑您显示的代码片段上方handleHttpRequest中的代码让一些非 websocket 请求溜走，也许是图标请求？