Myservlet source code V1

 

<Br/> /*********************************** * ****************** <br/> * This is a sip servlet. and it is not finished yet. <br/> * current version is 1.0 <br/> * Author norz <br/> * 03/06/2010 <br/> ************** **************************************** **/<br/> package myservlet; <br/> Import javax. annotation. resource; <br/> Import javax. naming. context; <br/> Import javax. naming. initialcontext; <br/> Import J Avax. naming. namingexception; <br/> Import javax. servlet. sip. address; <br/> Import javax. servlet. sip. proxy; <br/> Import javax. servlet. sip. siperrorevent; <br/> Import javax. servlet. sip. siperrorlistener; <br/> Import javax. servlet. sip. sipservlet; <br/> Import javax. servlet. sip. sipfactory; <br/> Import javax. servlet. sip. sipservletresponse; <br/> imports javax. servlet. sip. sipsession; <br/> Import Java. io. ioexce Ption; <br/> Import Java. util. hashmap; <br/> Import Java. util. properties; <br/> Import javax. servlet. servlet; <br/> Import javax. servlet. servletconfig; <br/> Import javax. servlet. servletexception; <br/> Import javax. servlet. sip. sipservletrequest; <br/> @ suppresswarnings ("UNUSED") <br/> @ javax. servlet. sip. annotation. sipservlet <br/> public class myservlet extends sipservlet implements siperrorlistener, servl Et {<br/>/** <br/> * serial version uid. <br/> */<br/> Private Static final long serialversionuid = 1l; </P> <p> Private Static final string contact_header = "Contact "; <br/> Private Static final string sdpcontent = "application/SDP"; <br/> Private Static final string holdflag = "A = sendonly "; <br/> Private Static final string resflag = "A = recvonly"; </P> <p> // call status <br/> Private Static final string B USY = "busy"; <br/> Private Static final string held = "held"; <br/> Private Static final string waiting = "Waiting "; </P> <p> Private Static callstatuscontainer callsc; <br/>/** <br/> * The SIP factory. can be used to create Uri and requests. <br/> */<br/> @ resource <br/> private sipfactory; </P> <p> Public myservlet () {<br/>}< br/>/** <br/> * @ inheritdoc <br/> */<br/> @ suppresswarnings ("unchec Ked ") <br/> protected void doregister (sipservletrequest req) <br/> throws servletexception, ioexception {<br/> int response = sipservletresponse. SC _ OK; <br/> sipservletresponse resp = req. createresponse (response); </P> <p> hashmap <string, string> Users = (hashmap <string, string>) getservletcontext (). getattribute ("registeredusersmap"); <br/> If (users = NULL) <br/> Users = new hashmap <string, string> (); <br/> G Etservletcontext (). setattribute ("registeredusermap", users); <br/> Address = req. getaddressheader (contact_header); <br/> string fromuri = req. getfrom (). geturi (). tostring (); </P> <p> int expires = address. getexpires (); <br/> If (expires <0) {<br/> expires = req. getexpires (); <br/>}< br/> If (expires = 0) {<br/> users. remove (fromuri); <br/> If (callsc. getspecstatus (req. getfrom (). tostring ())! = NULL) {<br/> callsc. removespeccall (req. getfrom (). tostring (); <br/>}< br/>} else {<br/> resp. setaddressheader (contact_header, address); <br/> users. put (fromuri, address. geturi (). tostring (); <br/>}</P> <p> resp. send (); <br/>}< br/>/** <br/> * @ inheritdoc <br/> */<br/> protected void dosuccessresponse (sipservletresponse resp) <br/> throws servletexception, ioexception {<br/> int response = sipservletr Esponse. SC _ OK; <br/> If (resp. getstatus () = Response) <br/>{< br/> string status = callsc. getspecstatus (resp. getto (). tostring (); <br/> If (status = held) <br/>{< br/> resp. setcontentlength (0); <br/> resp. send (); <br/> keystepofcallwait (RESP); <br/>}else <br/>{< br/> callsc. addcall (resp. getfrom (). tostring (), resp. getto (). tostring (), busy); <br/> callsc. addcall (resp. getto (). tostring (), resp. getfrom (). to String (), busy); <br/>}< br/>/** <br/> * If receive a 182 queued, set the call to held, and change response to 183. <br/> * This mechanic focus on. so when dosuccessresponse also focus on <br/> * callsc. getspecstatus (string to) <br/> */<br/> protected void doprovisionalresponse (sipservletresponse resp) <br/> throws servletexception, ioexception {<br/> int response = sipservletresp Onse. SC _session_progress; <br/> If (resp. getstatus () = sipservletresponse. SC _call_queued) <br/>{< br/> call = new call (resp. getfrom (). tostring (), resp. getto (). tostring (); <br/> call. setstatus (held); <br/> callsc. addcall (call. getfrom (), call. getto (), held); // actually only to is held, and is needed. <br/> resp. setstatus (response); <br/> resp. send (); <br/>}< br/>/** <br/> * Check the session The request, if it's a initial state, handle it as <br/> * a normal invite, else if it's a confirmed state, check if it contains <br/> * SDP message. and send 200 back. <br/> */<br/> protected void doinvite (sipservletrequest req) <br/> throws servletexception, ioexception {<br/> sipsession session = req. getsession (); <br/> If (Session. getstate (). equals (sipsession. state. initial) // This is a normal invite <Br/> {<br/> proxy = req. getproxy (); <br/> proxy. setrecordroute (true); <br/> proxy. setsupervised (true); <br/> proxy. proxyto (req. getrequesturi (); <br/>} else if (Session. getstate (). equals (sipsession. state. confirmed) // This's sent by a confirmed session, so it's a re-invite <br/>{< br/> If (req. getcontenttype (). equalsignorecase (sdpcontent) & req. getcontentlength ()! = 0) {// The request contains a SDP info <br/> string STR = req. getcontent (). tostring (); <br/> If (Str. indexof (holdflag )! =-1) {// check if is a call-hold re-invite <br/> int response = sipservletresponse. SC _ OK; <br/> sipservletresponse resp = req. createresponse (response); <br/> resp. send (); <br/> callsc. addcall (req. getfrom (). tostring (), req. getto (). tostring (), held); <br/>/* <br/> * Add SDP Mrs to request <br/> */<br/> proxy = req. getproxy (); <br/> proxy. setsupervised (true); <br/> proxy. setrecordroute (true); <br/> proxy. proxyto (req. getrequesturi ()); <br/>}</P> <p >}< br/>/** <br/> * @ inheritdoc <br/> */<br/> protected void doack (sipservletrequest req) <br/> throws servletexception, ioexception {<br/> // todo: implement this method <br/>}< br/>/** <br/> * @ inheritdoc <br/> */<br/> protected void dobye (sipservletrequest req) <br/> throws servletexception, ioexception {<br/> callsc. removecall (req. getfrom (). tostring (), req. getto (). tostring (); <br/> callsc. removecall (req. getto (). tostring (), req. getfrom (). tostring ()); <br/>}< br/>/** <br/> * @ inheritdoc <br/> */<br/> protected void doerrorresponse (sipservletresponse resp) <br/> throws servletexception, ioexception {<br/> callsc. removecall (resp. getfrom (). tostring (), resp. getto (). tostring (); <br/> callsc. removecall (resp. getto (). tostring (), resp. getfrom (). tostring (); <br/>}< br/> @ override <br/> Public void noackreceived (siperrorevent arg0) {<br/> // todo auto-generated method stub </P> <p >}< br/> @ override <br/> Public void noprackreceived (siperrorevent arg0) {<br/> // todo auto-generated method stub </P> <p >}</P> <p> Public void keystepofcallwait (sipservletresponse resp) throws ioexception {<br/> address to = (Address) resp. getto (). geturi (); <br/> address from = (Address) resp. getfrom (). geturi (); <br/> sipsession session = resp. getsession (); <br/> sipservletrequest request = session. createrequest ("invite"); <br/> request. setaddressheader ("from", from); <br/> request. setaddressheader ("to", to); <br/> request. send (); <br/> request. setaddressheader ("to", from); <br/> request. setaddressheader ("from", to); <br/> request. send (); <br/>}< br/>