package com.genersoft.iot.vmp.gb28181.transmit.request.impl;
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import javax.sip.InvalidArgumentException;
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import javax.sip.RequestEvent;
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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.ContentTypeHeader;
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import javax.sip.header.FromHeader;
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import javax.sip.header.SubjectHeader;
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import javax.sip.message.Request;
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import javax.sip.message.Response;
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import com.genersoft.iot.vmp.gb28181.bean.DeviceChannel;
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import com.genersoft.iot.vmp.gb28181.sdp.Codec;
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import com.genersoft.iot.vmp.gb28181.sdp.MediaDescription;
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import com.genersoft.iot.vmp.gb28181.sdp.SdpParser;
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import com.genersoft.iot.vmp.gb28181.sdp.SessionDescription;
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import com.genersoft.iot.vmp.gb28181.transmit.cmd.impl.SIPCommander;
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import com.genersoft.iot.vmp.gb28181.transmit.cmd.impl.SIPCommanderFroPlatform;
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import com.genersoft.iot.vmp.gb28181.transmit.request.SIPRequestAbstractProcessor;
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import com.genersoft.iot.vmp.storager.IVideoManagerStorager;
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import gov.nist.javax.sip.address.AddressImpl;
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import gov.nist.javax.sip.address.SipUri;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.IOException;
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import java.text.ParseException;
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import java.util.List;
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/**
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* @Description:处理INVITE请求
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* @author: panll
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* @date: 2021年1月14日
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*/
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public class InviteRequestProcessor extends SIPRequestAbstractProcessor {
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private final static Logger logger = LoggerFactory.getLogger(MessageRequestProcessor.class);
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private SIPCommanderFroPlatform cmderFroPlatform;
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private IVideoManagerStorager storager;
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/**
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* 处理invite请求
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*
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* @param evt
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* 请求消息
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*/
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@Override
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public void process(RequestEvent evt) {
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// Invite Request消息实现，此消息一般为级联消息，上级给下级发送请求视频指令
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try {
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Request request = evt.getRequest();
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SipURI sipURI = (SipURI) request.getRequestURI();
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String channelId = sipURI.getUser();
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String platformId = null;
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// SubjectHeader subjectHeader = (SubjectHeader)request.getHeader(SubjectHeader.NAME);
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// // 查询通道是否存在 不存在回复404
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// if (subjectHeader != null) { // 存在则从subjectHeader 获取平台信息
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// String subject = subjectHeader.getSubject();
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// if (subject != null) {
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// String[] info1 = subject.split(",");
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// if (info1 != null && info1 .length == 2) {
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// String[] info2 = info1[1].split(":");
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// if (info2 != null && info2.length == 2) {
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// platformId = info2[0];
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// }
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// }
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// }
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// }
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FromHeader fromHeader = (FromHeader)request.getHeader(FromHeader.NAME);
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AddressImpl address = (AddressImpl) fromHeader.getAddress();
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SipUri uri = (SipUri) address.getURI();
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platformId = uri.getUser();
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// if (platformId == null) { // 不存在则从fromHeader 获取平台信息
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// FromHeader fromHeader = (FromHeader)request.getHeader(FromHeader.NAME);
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// platformId = fromHeader.getName();
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// }
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if (platformId == null || channelId == null) {
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response400Ack(evt); // 参数不全， 发400，请求错误
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return;
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}
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// 查询平台下是否有该通道
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DeviceChannel channel = storager.queryChannelInParentPlatform(platformId, channelId);
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if (channel == null) {
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response404Ack(evt); // 通道不存在，发404，资源不存在
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return;
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}else {
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response100Ack(evt); // 通道存在，发100，trying
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}
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// 解析sdp消息
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byte[] sdpByteArray = request.getRawContent();
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SdpParser sdpParser = new SdpParser(); // TODO keng
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SessionDescription sdp = sdpParser.parse(sdpByteArray);
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// 获取支持的格式
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List<MediaDescription> mediaDescriptions = sdp.getMediaDescriptions();
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// 查看是否支持PS 负载96
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String ip = null;
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int port = -1;
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for (MediaDescription mediaDescription : mediaDescriptions) {
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List<Codec> codecs = mediaDescription.getCodecs();
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for (Codec codec : codecs) {
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if("96".equals(codec.getPayloadType()) || "PS".equals(codec.getName()) || "ps".equals(codec.getName())) {
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ip = mediaDescription.getIpAddress().getHostName();
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port = mediaDescription.getPort();
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break;
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}
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}
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}
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if (ip == null || port == -1) { // TODO 没有合适的视频流格式， 可配置是否使用第一个media信息
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if (mediaDescriptions.size() > 0) {
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ip = mediaDescriptions.get(0).getIpAddress().getHostName();
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port = mediaDescriptions.get(0).getPort();
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}
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}
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if (ip == null || port == -1) {
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response488Ack(evt);
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return;
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}
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String ssrc = sdp.getSsrc();
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// 通知下级推流，
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// 查找合适的端口推流，
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// 发送 200ok
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// 收到ack后调用推流接口
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} catch (SipException | InvalidArgumentException | ParseException e) {
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e.printStackTrace();
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} catch (IOException e) {
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logger.warn("sdp解析错误");
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e.printStackTrace();
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}
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}
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/***
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* 回复100 trying
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* @param evt
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* @throws SipException
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* @throws InvalidArgumentException
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* @throws ParseException
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*/
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private void response100Ack(RequestEvent evt) throws SipException, InvalidArgumentException, ParseException {
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Response response = getMessageFactory().createResponse(Response.TRYING, evt.getRequest());
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getServerTransaction(evt).sendResponse(response);
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}
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/***
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* 回复404
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* @param evt
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* @throws SipException
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* @throws InvalidArgumentException
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* @throws ParseException
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*/
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private void response404Ack(RequestEvent evt) throws SipException, InvalidArgumentException, ParseException {
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Response response = getMessageFactory().createResponse(Response.NOT_FOUND, evt.getRequest());
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getServerTransaction(evt).sendResponse(response);
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}
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/***
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* 回复400
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* @param evt
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* @throws SipException
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* @throws InvalidArgumentException
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* @throws ParseException
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*/
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private void response400Ack(RequestEvent evt) throws SipException, InvalidArgumentException, ParseException {
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Response response = getMessageFactory().createResponse(Response.BAD_REQUEST, evt.getRequest());
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getServerTransaction(evt).sendResponse(response);
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}
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/***
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* 回复488
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* @param evt
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* @throws SipException
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* @throws InvalidArgumentException
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* @throws ParseException
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*/
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private void response488Ack(RequestEvent evt) throws SipException, InvalidArgumentException, ParseException {
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Response response = getMessageFactory().createResponse(Response.NOT_ACCEPTABLE_HERE, evt.getRequest());
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getServerTransaction(evt).sendResponse(response);
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}
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/***
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* 回复200 OK
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* @param evt
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* @throws SipException
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* @throws InvalidArgumentException
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* @throws ParseException
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*/
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private void responseAck(RequestEvent evt, String sdp) throws SipException, InvalidArgumentException, ParseException {
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Response response = getMessageFactory().createResponse(Response.OK, evt.getRequest());
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ContentTypeHeader contentTypeHeader = getHeaderFactory().createContentTypeHeader("APPLICATION", "SDP");
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response.setContent(sdp, contentTypeHeader);
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getServerTransaction(evt).sendResponse(response);
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}
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public SIPCommanderFroPlatform getCmderFroPlatform() {
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return cmderFroPlatform;
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}
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public void setCmderFroPlatform(SIPCommanderFroPlatform cmderFroPlatform) {
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this.cmderFroPlatform = cmderFroPlatform;
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}
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public IVideoManagerStorager getStorager() {
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return storager;
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}
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public void setStorager(IVideoManagerStorager storager) {
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this.storager = storager;
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}
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}
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