package com.genersoft.iot.vmp.gb28181.transmit.event.request;
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import gov.nist.javax.sip.SipProviderImpl;
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import gov.nist.javax.sip.SipStackImpl;
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import gov.nist.javax.sip.message.SIPRequest;
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import gov.nist.javax.sip.stack.SIPServerTransaction;
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import org.apache.commons.lang3.ArrayUtils;
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import org.dom4j.Document;
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import org.dom4j.DocumentException;
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import org.dom4j.Element;
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import org.dom4j.io.SAXReader;
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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 javax.sip.*;
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import javax.sip.address.Address;
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import javax.sip.address.AddressFactory;
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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.ExpiresHeader;
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import javax.sip.header.HeaderFactory;
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import javax.sip.header.ViaHeader;
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import javax.sip.message.MessageFactory;
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import javax.sip.message.Request;
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import javax.sip.message.Response;
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import java.io.ByteArrayInputStream;
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import java.nio.ByteBuffer;
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import java.nio.charset.StandardCharsets;
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import java.text.ParseException;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.List;
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/**
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* @description:处理接收IPCamera发来的SIP协议请求消息
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* @author: songww
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* @date: 2020年5月3日 下午4:42:22
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*/
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public abstract class SIPRequestProcessorParent {
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private final static Logger logger = LoggerFactory.getLogger(SIPRequestProcessorParent.class);
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@Autowired
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@Qualifier(value="tcpSipProvider")
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private SipProviderImpl tcpSipProvider;
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@Autowired
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@Qualifier(value="udpSipProvider")
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private SipProviderImpl udpSipProvider;
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/**
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* 根据 RequestEvent 获取 ServerTransaction
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* @param evt
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* @return
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*/
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public ServerTransaction getServerTransaction(RequestEvent evt) {
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Request request = evt.getRequest();
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ServerTransaction serverTransaction = evt.getServerTransaction();
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// 判断TCP还是UDP
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boolean isTcp = false;
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ViaHeader reqViaHeader = (ViaHeader) request.getHeader(ViaHeader.NAME);
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String transport = reqViaHeader.getTransport();
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if (transport.equals("TCP")) {
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isTcp = true;
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}
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if (serverTransaction == null) {
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try {
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if (isTcp) {
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SipStackImpl stack = (SipStackImpl)tcpSipProvider.getSipStack();
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serverTransaction = (SIPServerTransaction) stack.findTransaction((SIPRequest)request, true);
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if (serverTransaction == null) {
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serverTransaction = tcpSipProvider.getNewServerTransaction(request);
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}
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} else {
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SipStackImpl stack = (SipStackImpl)udpSipProvider.getSipStack();
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serverTransaction = (SIPServerTransaction) stack.findTransaction((SIPRequest)request, true);
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if (serverTransaction == null) {
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serverTransaction = udpSipProvider.getNewServerTransaction(request);
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}
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}
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} catch (TransactionAlreadyExistsException e) {
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logger.error(e.getMessage());
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} catch (TransactionUnavailableException e) {
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logger.error(e.getMessage());
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}
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}
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return serverTransaction;
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}
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public AddressFactory getAddressFactory() {
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try {
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return SipFactory.getInstance().createAddressFactory();
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} catch (PeerUnavailableException e) {
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e.printStackTrace();
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}
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return null;
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}
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public HeaderFactory getHeaderFactory() {
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try {
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return SipFactory.getInstance().createHeaderFactory();
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} catch (PeerUnavailableException e) {
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e.printStackTrace();
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}
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return null;
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}
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public MessageFactory getMessageFactory() {
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try {
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return SipFactory.getInstance().createMessageFactory();
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} catch (PeerUnavailableException e) {
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e.printStackTrace();
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}
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return null;
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}
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/***
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* 回复状态码
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* 100 trying
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* 200 OK
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* 400
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* 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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public void responseAck(RequestEvent evt, int statusCode) throws SipException, InvalidArgumentException, ParseException {
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Response response = getMessageFactory().createResponse(statusCode, evt.getRequest());
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ServerTransaction serverTransaction = getServerTransaction(evt);
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if (serverTransaction == null) {
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logger.warn("回复失败：{}", response);
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return;
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}
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serverTransaction.sendResponse(response);
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if (statusCode >= 200 && !"NOTIFY".equals(evt.getRequest().getMethod())) {
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if (serverTransaction.getDialog() != null) serverTransaction.getDialog().delete();
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}
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}
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public void responseAck(RequestEvent evt, int statusCode, String msg) throws SipException, InvalidArgumentException, ParseException {
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Response response = getMessageFactory().createResponse(statusCode, evt.getRequest());
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response.setReasonPhrase(msg);
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ServerTransaction serverTransaction = getServerTransaction(evt);
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serverTransaction.sendResponse(response);
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if (statusCode >= 200 && !"NOTIFY".equals(evt.getRequest().getMethod())) {
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if (serverTransaction.getDialog() != null) serverTransaction.getDialog().delete();
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}
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}
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/**
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* 回复带sdp的200
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* @param evt
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* @param sdp
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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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public void responseSdpAck(RequestEvent evt, String sdp) throws SipException, InvalidArgumentException, ParseException {
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Response response = getMessageFactory().createResponse(Response.OK, evt.getRequest());
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SipFactory sipFactory = SipFactory.getInstance();
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ContentTypeHeader contentTypeHeader = sipFactory.createHeaderFactory().createContentTypeHeader("APPLICATION", "SDP");
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response.setContent(sdp, contentTypeHeader);
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SipURI sipURI = (SipURI)evt.getRequest().getRequestURI();
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Address concatAddress = sipFactory.createAddressFactory().createAddress(
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sipFactory.createAddressFactory().createSipURI(sipURI.getUser(), sipURI.getHost()+":"+sipURI.getPort()
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));
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response.addHeader(sipFactory.createHeaderFactory().createContactHeader(concatAddress));
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getServerTransaction(evt).sendResponse(response);
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}
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/**
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* 回复带xml的200
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* @param evt
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* @param xml
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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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public Response responseXmlAck(RequestEvent evt, String xml) throws SipException, InvalidArgumentException, ParseException {
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Response response = getMessageFactory().createResponse(Response.OK, evt.getRequest());
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SipFactory sipFactory = SipFactory.getInstance();
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ContentTypeHeader contentTypeHeader = sipFactory.createHeaderFactory().createContentTypeHeader("APPLICATION", "MANSCDP+xml");
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response.setContent(xml, contentTypeHeader);
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SipURI sipURI = (SipURI)evt.getRequest().getRequestURI();
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Address concatAddress = sipFactory.createAddressFactory().createAddress(
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sipFactory.createAddressFactory().createSipURI(sipURI.getUser(), sipURI.getHost()+":"+sipURI.getPort()
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));
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response.addHeader(sipFactory.createHeaderFactory().createContactHeader(concatAddress));
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response.addHeader(evt.getRequest().getHeader(ExpiresHeader.NAME));
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getServerTransaction(evt).sendResponse(response);
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return response;
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}
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public Element getRootElement(RequestEvent evt) throws DocumentException {
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return getRootElement(evt, "gb2312");
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}
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public Element getRootElement(RequestEvent evt, String charset) throws DocumentException {
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if (charset == null) charset = "gb2312";
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Request request = evt.getRequest();
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SAXReader reader = new SAXReader();
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reader.setEncoding(charset);
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// 对海康出现的未转义字符做处理。
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String[] destStrArray = new String[]{"<",">","&","'","""};
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char despChar = '&'; // 或许可扩展兼容其他字符
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byte destBye = (byte) despChar;
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List<Byte> result = new ArrayList<>();
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byte[] rawContent = request.getRawContent();
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for (int i = 0; i < rawContent.length; i++) {
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if (rawContent[i] == destBye) {
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boolean resul = false;
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for (String destStr : destStrArray) {
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if (i + destStr.length() <= rawContent.length) {
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byte[] bytes = Arrays.copyOfRange(rawContent, i, i + destStr.length());
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resul = resul || (Arrays.equals(bytes,destStr.getBytes()));
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}
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}
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if (resul) {
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result.add(rawContent[i]);
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}
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}else {
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result.add(rawContent[i]);
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}
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}
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Byte[] bytes = new Byte[0];
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byte[] bytesResult = ArrayUtils.toPrimitive(result.toArray(bytes));
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Document xml = reader.read(new ByteArrayInputStream(bytesResult));
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return xml.getRootElement();
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}
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}
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