尝试通过 Smack 连接 XMPP 服务器并出现错误

Question

我需要使用 Java API Smack 连接 XMPP 服务器并进一步发送 message/receive 消息。

我尝试使用 Smack API (4.1.8)，但出现错误 （在下方查找错误）.

注意：主机和端口都打开.

Code:`public class Sender {
public static void main(String a[]) throws NoResponseException,XMPPException,
InterruptedException, SmackException, IOException
{
    // Create the configuration for this new connection
   XMPPTCPConnectionConfiguration.Builder configBuilder =  XMPPTCPConnectionConfiguration.builder();
    configBuilder.setUsernameAndPassword("user", "******");
    configBuilder.setResource("work");
    configBuilder.setServiceName("HOstname");
    configBuilder.setSocketFactory(SSLSocketFactory.getDefault());
    configBuilder.setSecurityMode(SecurityMode.required);

    configBuilder.setCompressionEnabled(true);
    configBuilder.setHost("thingsociety.im");
    configBuilder.setDebuggerEnabled(true);
    configBuilder.setPort(5222);
    System.out.println("Connected1..............");

    XMPPTCPConnection connection = new XMPPTCPConnection(configBuilder.build());
    // Connect to the server
    try {
        System.out.println("Connected2..............");
        connection.setPacketReplyTimeout(100000);
        connection.connect();
        System.out.println("Connected3..............");
        // Log into the server
        connection.isConnected();
        connection.login();
        System.out.println("Connected4..............");
    }

    catch (XMPPException | SmackException | IOException e) {
         // TODO Auto-generated catch block
         e.printStackTrace();
         System.out.println(e.getMessage());
         }
    }
}

Error: No response received within reply timeout. Timeout was 100000ms (~100s). Used filter: No filter used or filter was 'null'. org.jivesoftware.smack.SmackException$NoResponseException: No response received within reply timeout. Timeout was 100000ms (~100s). Used filter: No filter used or filter was 'null'

Answer 1

所以基本上某些东西（本地防火墙或您的网关上）阻止了传出通信或 configBuilder.setServiceName("HOstname"); 服务名称（又名 XMPP 域）是错误的，可能拼写错误 - 特别是大写字母 O 看起来像拼写错误我.

我刚刚探测了 thingsociety.im:5222，它是打开的，所以很可能是防火墙问题。

另一个可能是服务器端未处理的低级错误。

尝试通过 Smack 连接 XMPP 服务器并出现错误

Trying to connect XMPP server by Smack and getting error

xmpp

smack