gb28181版本升级-补充

zhongrj

2023-06-27 2e98b20bea4463e4465e3c19059d0744a09aec06

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

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package com.genersoft.iot.vmp.gb28181.transmit.event.response.impl;

import com.genersoft.iot.vmp.conf.SipConfig;
import com.genersoft.iot.vmp.gb28181.bean.Device;
import com.genersoft.iot.vmp.gb28181.bean.SsrcTransaction;
import com.genersoft.iot.vmp.gb28181.session.VideoStreamSessionManager;
import com.genersoft.iot.vmp.gb28181.transmit.SIPProcessorObserver;
import com.genersoft.iot.vmp.gb28181.transmit.SIPSender;
import com.genersoft.iot.vmp.gb28181.transmit.cmd.ISIPCommander;
import com.genersoft.iot.vmp.gb28181.transmit.cmd.SIPRequestHeaderProvider;
import com.genersoft.iot.vmp.gb28181.transmit.event.response.SIPResponseProcessorAbstract;
import com.genersoft.iot.vmp.gb28181.utils.SipUtils;
import com.genersoft.iot.vmp.service.IDeviceService;
import com.genersoft.iot.vmp.utils.GitUtil;
import gov.nist.javax.sip.ResponseEventExt;
import gov.nist.javax.sip.SipProviderImpl;
import gov.nist.javax.sip.message.SIPResponse;
import gov.nist.javax.sip.stack.SIPClientTransaction;
import gov.nist.javax.sip.stack.SIPDialog;
import gov.nist.javax.sip.stack.SIPTransaction;
import gov.nist.javax.sip.stack.SIPTransactionImpl;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Component;

import javax.sdp.SdpFactory;
import javax.sdp.SdpParseException;
import javax.sdp.SessionDescription;
import javax.sip.*;
import javax.sip.address.Address;
import javax.sip.address.SipURI;
import javax.sip.header.CSeqHeader;
import javax.sip.header.UserAgentHeader;
import javax.sip.message.Request;
import javax.sip.message.Response;
import java.text.ParseException;


/**
 * @description: 处理INVITE响应
 * @author: panlinlin
 * @date: 2021年11月5日 16：40
 */
@Component
public class InviteResponseProcessor extends SIPResponseProcessorAbstract {

   private final static Logger logger = LoggerFactory.getLogger(InviteResponseProcessor.class);
   private final String method = "INVITE";

   @Autowired
   private SIPProcessorObserver sipProcessorObserver;


   @Autowired
   private SipFactory sipFactory;

   @Autowired
   private SIPSender sipSender;

   @Autowired
   private SIPRequestHeaderProvider headerProvider;


   @Override
   public void afterPropertiesSet() throws Exception {
      // 添加消息处理的订阅
      sipProcessorObserver.addResponseProcessor(method, this);
   }



   /**
    * 处理invite响应
    * 
    * @param evt 响应消息
    * @throws ParseException
    */
   @Override
   public void process(ResponseEvent evt ){
      try {

         SIPResponse response = (SIPResponse)evt.getResponse();
         int statusCode = response.getStatusCode();
         // trying不会回复
         if (statusCode == Response.TRYING) {
         }
         // 成功响应
         // 下发ack
         if (statusCode == Response.OK) {
            ResponseEventExt event = (ResponseEventExt)evt;

            String contentString = new String(response.getRawContent());
            // jainSip不支持y=字段， 移除以解析。
            int ssrcIndex = contentString.indexOf("y=");
            // 检查是否有y字段
            SessionDescription sdp;
            if (ssrcIndex >= 0) {
               //ssrc规定长度为10字节，不取余下长度以避免后续还有“f=”字段
               String substring = contentString.substring(0, contentString.indexOf("y="));
               sdp = SdpFactory.getInstance().createSessionDescription(substring);
            } else {
               sdp = SdpFactory.getInstance().createSessionDescription(contentString);
            }
            SipURI requestUri = sipFactory.createAddressFactory().createSipURI(sdp.getOrigin().getUsername(), event.getRemoteIpAddress() + ":" + event.getRemotePort());
            Request reqAck = headerProvider.createAckRequest(requestUri, response);

            logger.info("[回复ack] {}-> {}:{} ", sdp.getOrigin().getUsername(), event.getRemoteIpAddress(), event.getRemotePort());
            sipSender.transmitRequest(reqAck);
         }
      } catch (InvalidArgumentException | ParseException | SipException | SdpParseException e) {
         logger.info("[点播回复ACK]，异常：", e );
      }
   }

}