package com.genersoft.iot.vmp.gb28181.transmit.response.impl;
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import java.text.ParseException;
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import javax.sip.Dialog;
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import javax.sip.InvalidArgumentException;
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import javax.sip.ResponseEvent;
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import javax.sip.SipException;
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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.ViaHeader;
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import javax.sip.message.Request;
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import javax.sip.message.Response;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.stereotype.Component;
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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.transmit.SIPProcessorFactory;
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import com.genersoft.iot.vmp.gb28181.transmit.response.ISIPResponseProcessor;
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/**
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* @Description:处理INVITE响应
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* @author: swwheihei
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* @date: 2020年5月3日 下午4:43:52
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*/
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@Component
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public class InviteResponseProcessor implements ISIPResponseProcessor {
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private final static Logger logger = LoggerFactory.getLogger(SIPProcessorFactory.class);
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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, SipLayer layer, SipConfig config) throws ParseException {
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try {
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Response response = 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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// ClientTransaction clientTransaction = evt.getClientTransaction();
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// if(clientTransaction == null){
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// logger.error("回复ACK时，clientTransaction为null >>> {}",response);
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// return;
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// }
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// Dialog clientDialog = clientTransaction.getDialog();
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// CSeqHeader clientCSeqHeader = (CSeqHeader)
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// response.getHeader(CSeqHeader.NAME);
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// long cseqId = clientCSeqHeader.getSeqNumber();
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// /*
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// 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。
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// 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
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// 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。
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// */
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// Request ackRequest = clientDialog.createAck(cseqId);
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// SipURI requestURI = (SipURI) ackRequest.getRequestURI();
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// ViaHeader viaHeader = (ViaHeader) response.getHeader(ViaHeader.NAME);
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// try {
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// requestURI.setHost(viaHeader.getHost());
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// } catch (Exception e) {
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// e.printStackTrace();
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// }
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// requestURI.setPort(viaHeader.getPort());
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// clientDialog.sendAck(ackRequest);
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Dialog dialog = evt.getDialog();
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CSeqHeader cseq = (CSeqHeader) response.getHeader(CSeqHeader.NAME);
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Request reqAck = dialog.createAck(cseq.getSeqNumber());
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SipURI requestURI = (SipURI) reqAck.getRequestURI();
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ViaHeader viaHeader = (ViaHeader) response.getHeader(ViaHeader.NAME);
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// String viaHost =viaHeader.getHost();
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//getHost()函数取回的IP地址是“[xxx.xxx.xxx.xxx:yyyy]”的格式，需用正则表达式截取为“xxx.xxx.xxx.xxx"格式
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// Pattern p = Pattern.compile("(?<=//|)((\\w)+\\.)+\\w+");
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// Matcher matcher = p.matcher(viaHeader.getHost());
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// if (matcher.find()) {
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// requestURI.setHost(matcher.group());
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// }
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requestURI.setHost(viaHeader.getHost());
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requestURI.setPort(viaHeader.getPort());
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reqAck.setRequestURI(requestURI);
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dialog.sendAck(reqAck);
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}
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} catch (InvalidArgumentException | SipException e) {
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e.printStackTrace();
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}
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}
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}
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