Question

我使用tyrus websocket客户端（1.11）连接到websocket。

compile 'org.glassfish.tyrus:tyrus-client:1.+'
compile 'org.glassfish.tyrus:tyrus-container-grizzly-client:1.+'

我正在运行本地wscat服务器（wscat --listen）来测试我的连接。

我的客户端做的是它连接到websocket，发送文本字符串后跟二进制加载（0xb5,0xb2,0xb1,0xb0,0xb1,0xb2,0xc6），然后是另一个字符串然后断开连接。

这是服务器看到的（并且正是我所期望的）：

listening on port 8666 (press CTRL+C to quit)
client connected
< Ohai, Server!
< �������
< Bye, Server!
disconnected

注意 ：执行连接的实体，Monkey类扩展Thread并以异步方式运行，因此某些日志行可能是无序。

但是，在客户端，事情并非像桃子一样。虽然日志同意建立连接，但发送了三个块，并且连接已关闭，它还为我提供了一个堆栈跟踪连接失败，因为没有收到握手响应（请参阅完整日志{ {3}}）：

...
[org.glassfish.tyrus.client.TyrusClientEngine] FINE: > Session af609b3f-2978-453f-9758-10351d5ed2af [43 ms]: Sending handshake request:
> GET ws://127.0.0.1:8666
> Connection: Upgrade
> Host: 127.0.0.1:8666
> Origin: 127.0.0.1:8666
> Sec-WebSocket-Key: pGNihDxLIbQqcxvMTBERSQ==
> Sec-WebSocket-Protocol: binary
> Sec-WebSocket-Version: 13
> Upgrade: websocket

[org.glassfish.tyrus.client.TyrusClientEngine] FINE: < Session af609b3f-2978-453f-9758-10351d5ed2af [324 ms]: Received handshake response: 
< 101
< connection: Upgrade
< sec-websocket-accept: EZjq5dEOzWz2q46tKtNlVD8K+mk=
< sec-websocket-protocol: binary
< upgrade: websocket
...
[MONKEY_0] FINER: Session 'af609b3f-2978-453f-9758-10351d5ed2af' opened
[RUNNER] INFO: MONKEY_0 connected
[MONKEY_0] FINER: Sending messages...
[MONKEY_0] FINER: Saying Hi...
[org.glassfish.tyrus.core.TyrusRemoteEndpoint] FINEST: > Session af609b3f-2978-453f-9758-10351d5ed2af [335 ms]: Sending text message: Ohai, Server!
...
[MONKEY_0] FINER: Said Hi. Now Sending binary data...
[org.glassfish.tyrus.core.TyrusRemoteEndpoint] FINEST: > Session af609b3f-2978-453f-9758-10351d5ed2af [342 ms]: Sending binary message
[MONKEY_0] FINER: Binary sent. Saying Bye...
[org.glassfish.tyrus.core.TyrusRemoteEndpoint] FINEST: > Session af609b3f-2978-453f-9758-10351d5ed2af [344 ms]: Sending text message: Bye, Server!
[MONKEY_0] FINER: Messages sent.
[MONKEY_0] INFO: Closing socket.
[org.glassfish.tyrus.core.TyrusRemoteEndpoint] FINE: Close public void close(CloseReason cr): CloseReason[1000,Bye]
...
[MONKEY_0] FINER: Session 'af609b3f-2978-453f-9758-10351d5ed2af' closed (Bye)
[RUNNER] INFO: MONKEY_0 disconnected
[MONKEY_0] SEVERE: Unable to connect to 'ws://127.0.0.1:8666'
javax.websocket.DeploymentException: Handshake response not received.
    at org.glassfish.tyrus.client.ClientManager$3$1.run(ClientManager.java:691)
    at org.glassfish.tyrus.client.ClientManager$3.run(ClientManager.java:712)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at org.glassfish.tyrus.client.ClientManager$SameThreadExecutorService.execute(ClientManager.java:866)
    at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:112)
    at org.glassfish.tyrus.client.ClientManager.connectToServer(ClientManager.java:511)
    at org.glassfish.tyrus.client.ClientManager.connectToServer(ClientManager.java:373)
    at com.redacted.webmonkey.monkey.Monkey.connect(Monkey.java:90)
    at com.redacted.webmonkey.monkey.Monkey.run(Monkey.java:47)
Caused by: java.lang.InterruptedException
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedNanos(AbstractQueuedSynchronizer.java:1039)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer.tryAcquireSharedNanos(AbstractQueuedSynchronizer.java:1328)
    at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:277)
    at org.glassfish.tyrus.client.ClientManager$3$1.run(ClientManager.java:666)
    ... 9 more
...
[RUNNER] SEVERE: 'MONKEY_0' failed. Error: Cannot connect
...

为什么有明显的第二次连接尝试？这是怎么回事？

我扔了一些时间戳，看看实际发生了什么：

Session s = null;
try {
    LOG.d("(%d) attempting to connect", System.currentTimeMillis());
    WebSocketContainer wsc = ContainerProvider.getWebSocketContainer();
    s = wsc.connectToServer(this, uri);
    LOG.d("(%d) Connected", System.currentTimeMillis());
} catch (Exception e) {
    LOG.e("(%d) Unable to connect to '%s'", System.currentTimeMillis(), uri);
    e.printStackTrace();
}

LOG.d("(%d) Session id : %s", System.currentTimeMillis(), s == null ? null : s.getId());
return s != null;

我实际上得到的结果表明我无法连接（但我做了并发送了这些消息，不是吗？）

[MONKEY_0] FINER: (1441396510763) attempting to connect
[MONKEY_0] FINER: (1441396511068) Session '4c0b1f6e-de7e-471d-a801-f807895c4a0b' opened
[MONKEY_0] FINER: (1441396511079) Session '4c0b1f6e-de7e-471d-a801-f807895c4a0b' closed (Bye)
[MONKEY_0] SEVERE: (1441396511080) Unable to connect to 'ws://127.0.0.1:8666'
[MONKEY_0] FINER: (1441396511081) Session id : null

当我与ws进行交易时，看起来连接呼叫被阻止了。它是否假设存在错误，因为在onOpen回调结束时连接已关闭？

Answer 1

好的，所以似乎在onOpen回调期间关闭会话确实是 WebsocketContainer混淆并认为连接失败的原因。仅仅是为了测试，我使用getBasicRemote()（同步）发送消息，然后在完成所有操作后关闭套接字。我切换到使用getAsyncRemote()并在发送所有消息后关闭，现在wsc正确报告连接成功。

我想知道阻止回调是否是一个好主意？

Answer 2

请勿在{{1}}中致电Thread.sleep()。使用您自己的线程发送消息，onOpen(Session session, EndpointConfig endpointConfig)返回Session对象，使用此对象发送消息。

得到＆＃34;没有收到握手回复。＆＃34;关闭websocket后

2 个答案: