package com.genersoft.iot.vmp.gb28181.transmit.event.response.impl;
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import com.genersoft.iot.vmp.conf.SipConfig;
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import com.genersoft.iot.vmp.gb28181.SipLayer;
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import com.genersoft.iot.vmp.gb28181.bean.Device;
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import com.genersoft.iot.vmp.gb28181.bean.SsrcTransaction;
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import com.genersoft.iot.vmp.gb28181.session.VideoStreamSessionManager;
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import com.genersoft.iot.vmp.gb28181.transmit.SIPProcessorObserver;
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import com.genersoft.iot.vmp.gb28181.transmit.SIPSender;
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import com.genersoft.iot.vmp.gb28181.transmit.cmd.ISIPCommander;
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import com.genersoft.iot.vmp.gb28181.transmit.cmd.SIPRequestHeaderProvider;
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import com.genersoft.iot.vmp.gb28181.transmit.event.response.SIPResponseProcessorAbstract;
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import com.genersoft.iot.vmp.gb28181.utils.SipUtils;
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import com.genersoft.iot.vmp.service.IDeviceService;
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import com.genersoft.iot.vmp.utils.GitUtil;
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import gov.nist.javax.sip.ResponseEventExt;
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import gov.nist.javax.sip.SipProviderImpl;
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import gov.nist.javax.sip.message.SIPResponse;
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import gov.nist.javax.sip.stack.SIPClientTransaction;
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import gov.nist.javax.sip.stack.SIPDialog;
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import gov.nist.javax.sip.stack.SIPTransaction;
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import gov.nist.javax.sip.stack.SIPTransactionImpl;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.beans.factory.annotation.Qualifier;
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import org.springframework.stereotype.Component;
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import javax.sdp.SdpFactory;
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import javax.sdp.SdpParseException;
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import javax.sdp.SessionDescription;
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import javax.sip.*;
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import javax.sip.address.Address;
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import javax.sip.address.SipURI;
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import javax.sip.header.CSeqHeader;
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import javax.sip.header.UserAgentHeader;
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import javax.sip.message.Request;
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import javax.sip.message.Response;
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import java.text.ParseException;
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/**
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* @description: 处理INVITE响应
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* @author: panlinlin
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* @date: 2021年11月5日 16：40
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*/
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@Component
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public class InviteResponseProcessor extends SIPResponseProcessorAbstract {
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private final static Logger logger = LoggerFactory.getLogger(InviteResponseProcessor.class);
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private final String method = "INVITE";
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@Autowired
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private SIPProcessorObserver sipProcessorObserver;
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@Autowired
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private SipLayer sipLayer;
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@Autowired
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private SIPSender sipSender;
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@Autowired
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private SIPRequestHeaderProvider headerProvider;
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@Override
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public void afterPropertiesSet() throws Exception {
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// 添加消息处理的订阅
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sipProcessorObserver.addResponseProcessor(method, this);
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}
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/**
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* 处理invite响应
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*
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* @param evt 响应消息
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* @throws ParseException
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*/
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@Override
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public void process(ResponseEvent evt ){
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try {
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SIPResponse response = (SIPResponse)evt.getResponse();
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int statusCode = response.getStatusCode();
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// trying不会回复
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if (statusCode == Response.TRYING) {
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}
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// 成功响应
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// 下发ack
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if (statusCode == Response.OK) {
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ResponseEventExt event = (ResponseEventExt)evt;
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String contentString = new String(response.getRawContent());
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// jainSip不支持y=字段， 移除以解析。
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int ssrcIndex = contentString.indexOf("y=");
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// 检查是否有y字段
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SessionDescription sdp;
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if (ssrcIndex >= 0) {
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//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
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String substring = contentString.substring(0, contentString.indexOf("y="));
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sdp = SdpFactory.getInstance().createSessionDescription(substring);
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} else {
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sdp = SdpFactory.getInstance().createSessionDescription(contentString);
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}
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SipURI requestUri = sipLayer.getSipFactory().createAddressFactory().createSipURI(sdp.getOrigin().getUsername(), event.getRemoteIpAddress() + ":" + event.getRemotePort());
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Request reqAck = headerProvider.createAckRequest(response.getLocalAddress().getHostAddress(), requestUri, response);
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logger.info("[回复ack] {}-> {}:{} ", sdp.getOrigin().getUsername(), event.getRemoteIpAddress(), event.getRemotePort());
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sipSender.transmitRequest( response.getLocalAddress().getHostAddress(), reqAck);
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}
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} catch (InvalidArgumentException | ParseException | SipException | SdpParseException e) {
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logger.info("[点播回复ACK]，异常：", e );
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}
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}
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}
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