小程序中的netty拋出AccessControlException

Question

我在applet中使用netty 3，當我從瀏覽器啟動它時，它會在Java控制台中顯示以下堆棧跟蹤信息，如果我是從Eclipse Applet Viewer運行的，則不會發生此問題：

network: Cache entry not found [url: http://<IP address>/crossdomain.xml, version: null]
network: Connecting http://<IP address>/crossdomain.xml with proxy=DIRECT
network: Connecting http://<IP address>:80/ with proxy=DIRECT
java.net.ConnectException: Connection refused: connect
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at sun.net.NetworkClient.doConnect(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.http.HttpClient.<init>(Unknown Source)
    at sun.net.www.http.HttpClient.New(Unknown Source)
    at sun.net.www.http.HttpClient.New(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
    at com.sun.deploy.net.CrossDomainXML$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.deploy.net.CrossDomainXML.privilegedConnect(Unknown Source)
    at com.sun.deploy.net.CrossDomainXML.check(Unknown Source)
    at com.sun.deploy.net.CrossDomainXML.check(Unknown Source)
    at sun.plugin2.applet.SecurityManagerHelper.checkConnectHelper(Unknown Source)
    at sun.plugin2.applet.AWTAppletSecurityManager.checkConnect(Unknown Source)
    at sun.nio.ch.SocketChannelImpl.connect(Unknown Source)
    at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink.connect(NioClientSocketPipelineSink.java:150)
    at org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink.eventSunk(NioClientSocketPipelineSink.java:113)
    at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendDownstream(DefaultChannelPipeline.java:771)
    at org.jboss.netty.handler.codec.oneone.OneToOneEncoder.handleDownstream(OneToOneEncoder.java:60)
    at org.jboss.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:591)
    at org.jboss.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:582)
    at org.jboss.netty.channel.Channels.connect(Channels.java:541)
    at org.jboss.netty.channel.AbstractChannel.connect(AbstractChannel.java:210)
    at org.jboss.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:227)
    at org.jboss.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:188)
    at org.mypackage.Myclass.connect(Client.java:80)

還有這個

Exception caught: [id: 0x00498342] EXCEPTION: java.security.AccessControlException: access denied ("java.net.SocketPermission" "<IP address>:18090" "connect,resolve")
Exception caught: [id: 0x00498342] EXCEPTION: java.nio.channels.ClosedChannelException

我在本地PC上進行測試，但指定了要連接的IP地址。

這是我的connect方法中的第80行：

future = bootstrap.connect(new InetSocketAddress(host, port));

我試圖圍繞它沒有成功

    AccessController.doPrivileged(
        new PrivilegedAction<Void>() {
            public Void run () {
                MyClass.connect(type, userId, secondValue);
                return null;
            }
         }
    );

請提出建議，我該如何解決？

Answer 1

我能夠解決問題。

首先，我嘗試連接到127.0.0.1 ，但是為此我必須安裝Jetty並將applet和hmtl放置在jetty中。 因此它開始僅適用於本地主機。

與未簽名的Java小程序的原始服務器的套接字連接

它對於10.xyz仍然不起作用，所以我必須簽署applet

是否可以免費簽署Java Applet？

並在碼頭上創建crossdomain.xml ，如下所示：

訪問被拒絕（java.net.SocketPermission 127.0.0.1:8080 connect，resolve）