[英]Connect through squid proxy with pusher lib
我必须连接到pusher上托管的websocket,它们提供了一个lib 。
我设法通过cntlm代理使其在我的开发环境上工作,我的connectionEventListener中有这样的日志
New state for pusher connection: CONNECTING -> CONNECTED
private final ConnectionEventListener connectionEventListener = new ConnectionEventListener() {
@Override
public void onConnectionStateChange(ConnectionStateChange connectionStateChange) {
log.info("New state for pusher connection: {} -> {}",
connectionStateChange.getPreviousState(),
connectionStateChange.getCurrentState());
}
@Override
public void onError(String s, String s1, Exception e) {
log.error("Some error {} - {} - {}", s, s1, e);
}
};
问题出在我们的预生产环境中,它位于鱿鱼代理(v.3.5.12)的后面,我在日志中得到了它:
New state for pusher connection: DISCONNECTED -> CONNECTING
Exception in thread "Thread-8" java.lang.InternalError: Should not reach here
at java.net.HttpConnectSocketImpl.doTunneling(HttpConnectSocketImpl.java:181)
at java.net.HttpConnectSocketImpl.doTunnel(HttpConnectSocketImpl.java:168)
at java.net.HttpConnectSocketImpl.access$200(HttpConnectSocketImpl.java:44)
at java.net.HttpConnectSocketImpl$2.run(HttpConnectSocketImpl.java:151)
at java.net.HttpConnectSocketImpl$2.run(HttpConnectSocketImpl.java:149)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.HttpConnectSocketImpl.privilegedDoTunnel(HttpConnectSocketImpl.java:148)
at java.net.HttpConnectSocketImpl.connect(HttpConnectSocketImpl.java:111)
at java.net.Socket.connect(Socket.java:589)
at com.pusher.java_websocket.client.WebSocketClient.run(WebSocketClient.java:165)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at java.net.HttpConnectSocketImpl.doTunneling(HttpConnectSocketImpl.java:179)
... 10 more
Caused by: java.io.IOException: Unable to tunnel through proxy. Proxy returns "HTTP/1.1 403 Forbidden"
at sun.net.www.protocol.http.HttpURLConnection.doTunneling(HttpURLConnection.java:2084)
... 15 more
我的问题是,有人设法从鱿鱼代理后面的java中的pusher中消耗了websocket。
更新:问题已解决,我们的鱿鱼代理缺少一些允许连接的规则。
我最近没有遇到同样的问题,所以我看不出您如何解决该问题。
该URL已在内部鱿鱼代理中列入白名单,但是,当前Pusher Java客户端库实现的问题是(Pusher的java-websocket
客户端1.4.1版本),构造函数使用主机地址(ws)创建了InetAddress。 pusherapp.com),导致将网址解析为IP地址。
然后,库尝试使用解析的IP地址打开套接字(使用代理),而不是使用URL地址打开套接字连接。 这对于代理来说是有问题的,因为Pusher使用AWS,并且URL被动态解析为随机的AWS IP地址。
我可以通过在com.pusher.java_websocket.client
软件包中修补WebSocketClient.java
来更改此行为,如下所示
在public void run()
方法中,原始行是:
this.socket.connect(new InetSocketAddress(this.uri.getHost(), this.getPort()), this.connectTimeout);
我用this.socket.connect(InetSocketAddress.createUnresolved(this.uri.getHost(), this.uri.getPort()), this.connectTimeout);
替换了this.socket.connect(InetSocketAddress.createUnresolved(this.uri.getHost(), this.uri.getPort()), this.connectTimeout);
InetScoketAddress
第二个构造函数不使用DNS来解析URL,并且库使用URL地址向Pusher服务器发出请求。
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