修复空指针异常

panlinlin

2020-12-27 6968839f21fb05bf6e3204c2040ee47130006cd0

 src/main/java/com/genersoft/iot/vmp/gb28181/transmit/response/impl/InviteResponseProcessor.java

@@ -2,7 +2,6 @@


import java.text.ParseException;



import javax.sip.ClientTransaction;

import javax.sip.Dialog;

import javax.sip.InvalidArgumentException;

import javax.sip.ResponseEvent;

@@ -13,6 +12,7 @@
import javax.sip.message.Request;

import javax.sip.message.Response;



import gov.nist.javax.sip.header.CSeq;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.stereotype.Component;

@@ -22,58 +22,47 @@
import com.genersoft.iot.vmp.gb28181.transmit.SIPProcessorFactory;

import com.genersoft.iot.vmp.gb28181.transmit.response.ISIPResponseProcessor;



/**    


/**

 * @Description:处理INVITE响应

 * @author: songww

 * @date:   2020年5月3日 下午4:43:52     
 * @author: swwheihei

 * @date: 2020年5月3日 下午4:43:52

 */

@Component

public class InviteResponseProcessor implements ISIPResponseProcessor {



   private final static Logger logger = LoggerFactory.getLogger(SIPProcessorFactory.class);

	
   private final static Logger logger = LoggerFactory.getLogger(InviteResponseProcessor.class);



   /**

    * 处理invite响应

    * 

    * @param evt

    *            响应消息

    */ 
    * @param evt 响应消息

    * @throws ParseException

    */

   @Override

   public void process(ResponseEvent evt, SipLayer layer, SipConfig config) {

   public void process(ResponseEvent evt, SipLayer layer, SipConfig config) throws ParseException {

      try {

         Response response = evt.getResponse();

         int statusCode = response.getStatusCode();

         //trying不会回复

         if(statusCode == Response.TRYING){



         // trying不会回复

         if (statusCode == Response.TRYING) {

         }

         //成功响应

         //下发ack

         if(statusCode == Response.OK){

            ClientTransaction clientTransaction = evt.getClientTransaction();

            if(clientTransaction == null){

               logger.error("回复ACK时，clientTransaction为null >>> {}",response);

               return;

            }

            Dialog clientDialog = clientTransaction.getDialog();

         // 成功响应

         // 下发ack

         if (statusCode == Response.OK) {

            Dialog dialog = evt.getDialog();

            CSeqHeader cseq = (CSeqHeader) response.getHeader(CSeqHeader.NAME);

            Request reqAck = dialog.createAck(cseq.getSeqNumber());



            CSeqHeader clientCSeqHeader = (CSeqHeader) response.getHeader(CSeqHeader.NAME);

            long cseqId = clientCSeqHeader.getSeqNumber();

            /*

            createAck函数，创建的ackRequest，会采用Invite响应的200OK，中的contact字段中的地址，作为目标地址。

            有的终端传上来的可能还是内网地址，会造成ack发送不出去。接受不到音视频流

            所以在此处统一替换地址。和响应消息的Via头中的地址保持一致。

             */

            Request ackRequest = clientDialog.createAck(cseqId);

            SipURI requestURI = (SipURI) ackRequest.getRequestURI();

            SipURI requestURI = (SipURI) reqAck.getRequestURI();

            ViaHeader viaHeader = (ViaHeader) response.getHeader(ViaHeader.NAME);

            requestURI.setHost(viaHeader.getHost());

            requestURI.setPort(viaHeader.getPort());

            clientDialog.sendAck(ackRequest);

            reqAck.setRequestURI(requestURI);



            dialog.sendAck(reqAck);

         }

      } catch (InvalidArgumentException | SipException e) {

         e.printStackTrace();

      } catch (ParseException e) {

         e.printStackTrace();

      }

   }