Examples of ContactHeader

javax.sip.header.ContactHeader
A Contact header field value provides a URI whose meaning depends on the type of request or response it is in. A Contact header field value can contain a display name, a URI with URI parameters, and header parameters.
The Contact header field provides a SIP or SIPS URI that can be used to contact that specific instance of the User Agent for subsequent requests. The Contact header field MUST be present and contain exactly one SIP or SIPS URI in any request that can result in the establishment of a dialog. For the methods defined in this specification, that includes only the INVITE request. For these requests, the scope of the Contact is global. That is, the Contact header field value contains the URI at which the User Agent would like to receive requests, and this URI MUST be valid even if used in subsequent requests outside of any dialogs.
If the Request-URI or top Route header field value contains a SIPS URI, the Contact header field MUST contain a SIPS URI as well.
Messages and Contact Headers
- Requests: A contact header is mandatory for INVITE's and optional for ACK, OPTIONS and REGISTER requests. This allows the callee to send future Requests, such as BYE Requests, directly to the caller instead of through a series of proxies.
- Informational Responses - A contact header is optional in a Informational Response to an INVITE request. It has the same semantics in an Informational Response as a Success Response.
- Success Responses - A contact header is mandatory in response to INVITE's and optional in response to OPTIONS and REGISTER requests. An user agent server sending a Success Response to an INIVTE must insert a ContactHeader in the Response indicating the SIP address under which it is reachable most directly for future SIP Requests.
- Redirection Responses - A contact header is optional in response to INVITE's, OPTIONS, REGISTER and BYE requests. A proxy may also delete the contact header.
- Ambiguous Header: - A contact header is optional in response to INVITE, OPTIONS, REGISTER and BYE requests.
The ContactHeader defines the Contact parameters "q" and "expires". The q-value value is used to prioritize addresses in a list of contact addresses. The expires value suggests an expiration interval that indicates how long the client would like a registration to be valid for a specific address. These parameters are only used when the Contact is present in a:
- REGISTER request
- REGISTER response
- 3xx response
For Example:
Contact: "Mr. Watson" sip:watson@worcester.jcp.org; q=0.7; expires=3600, "Mr. Watson" mailto:watson@jcp.org.com; q=0.1 @see HeaderAddress @see Parameters @author BEA Systems, NIST @version 1.2
org.zoolu.sip.header.ContactHeader
SIP Header Contact. The Contact header field provides a SIP or SIPS URI that can be used to contact that specific instance of the UA for subsequent requests. The Contact header field MUST be present and contain exactly one SIP URI in any request that can result in the establishment of a dialog (i.e. INVITEs).
Note: for backward compatibility with legacy implementations the date format in 'expires' parameter is still supported although it has been deprecated in RFC 3261.

Examples of javax.sip.header.ContactHeader

                        request);
                ToHeader toHeader = (ToHeader) response.getHeader(ToHeader.NAME);
                toHeader.setTag("4321");
                Address address = protocolObjects.addressFactory.createAddress("Shootme <sip:"
                        + myAddress + ":" + myPort + ">");
                ContactHeader contactHeader = protocolObjects.headerFactory
                        .createContactHeader(address);
                response.addHeader(contactHeader);


                // Thread.sleep(5000);
                logger.info("got a server tranasaction " + st);

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Examples of org.zoolu.sip.header.ContactHeader

         for (Enumeration e=location_service.getUserContactURLs(user); e.hasMoreElements(); )
         {  String url=(String)e.nextElement();
            int expires=(int)(location_service.getUserContactExpirationDate(user,url).getTime()-System.currentTimeMillis())/1000;
            if (expires>0)
            {  // not expired
               ContactHeader ch=new ContactHeader(location_service.getUserContactNameAddress(user,url));
               ch.setExpires(expires);
               v.addElement(ch);
            }
         }
         if (v.size()>0) resp.setContacts(new MultipleHeader(v));
         return resp;
      }
      // else     


      Vector contacts=msg.getContacts().getHeaders();
      int result=200;
      Message resp=MessageFactory.createResponse(msg,result,SipResponses.reasonOf(result),null);  


      ContactHeader contact_0=new ContactHeader((Header)contacts.elementAt(0));
      if (contact_0.isStar())
      {  printLog("DEBUG: ContactHeader is star",LogLevel.LOW);
         Vector resp_contacts=new Vector();
         for (Enumeration e=location_service.getUserContactURLs(user); e.hasMoreElements();) 
         {  String url=(String)(e.nextElement());
            NameAddress name_address=location_service.getUserContactNameAddress(user,url);
            // update db
            location_service.removeUserContact(user,url);
            printLog("contact removed: "+url,LogLevel.LOW);
            if (exp_secs>0)
            {  Date exp_date=new Date(System.currentTimeMillis()+((long)exp_secs)*1000);
               location_service.addUserContact(user,name_address,exp_date);
               //DateFormat df=new SimpleDateFormat("EEE, dd MMM yyyy hh:mm:ss 'GMT'",Locale.ITALIAN);
               //printLog("contact added: "+url+"; expire: "+df.format(location_service.getUserContactExpire(user,url)),LogLevel.LOW);
               printLog("contact added: "+url+"; expire: "+DateFormat.formatEEEddMMM(location_service.getUserContactExpirationDate(user,url)),LogLevel.LOW);
            }
            ContactHeader contact_i=new ContactHeader(name_address.getAddress());
            contact_i.setExpires(exp_secs);
            resp_contacts.addElement(contact_i);
         }
         if (resp_contacts.size()>0) resp.setContacts(new MultipleHeader(resp_contacts));
      }
      else
      {  Vector resp_contacts=new Vector();
         for (int i=0; i<contacts.size(); i++)     
         {  ContactHeader contact_i=new ContactHeader((Header)contacts.elementAt(i));
            NameAddress name_address=contact_i.getNameAddress();     
            String url=name_address.getAddress().toString();     
            int exp_secs_i=exp_secs;
            if (contact_i.hasExpires()) 
            {  exp_secs_i=contact_i.getExpires();
            }
            // limit the expire value
            if (exp_secs_i<0) exp_secs_i=0;
            else
            if (exp_secs_i>server_profile.expires) exp_secs_i=server_profile.expires;
                        
            // update db
            location_service.removeUserContact(user,url);
            if (exp_secs_i>0)
            {  Date exp_date=new Date(System.currentTimeMillis()+((long)exp_secs)*1000);
               location_service.addUserContact(user,name_address,exp_date);
               printLog("registration of user "+user+" updated",LogLevel.HIGH);
            }           
            contact_i.setExpires(exp_secs_i);
            resp_contacts.addElement(contact_i);
         }
         if (resp_contacts.size()>0) resp.setContacts(new MultipleHeader(resp_contacts));
      }

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