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<concept xml:lang="en" id="GUID-1B3D9B3D-D507-5D78-9E90-060C26D3F971"><title>Examples Showing the use of the SIP Codec API</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>The following sections describe the use of the SIP Codec API. </p> <ul><li id="GUID-57701C66-D973-5F0B-96A0-1E99C347B7EA"><p> <xref href="GUID-1B3D9B3D-D507-5D78-9E90-060C26D3F971.dita#GUID-1B3D9B3D-D507-5D78-9E90-060C26D3F971/GUID-F124CB52-955C-53B5-9A43-E0D9B04F539C">Decoding a Contact Header using the SIP stack</xref>  </p> </li> <li id="GUID-4E087736-B5E4-594E-9877-7F4CB6C7F292"><p> <xref href="GUID-1B3D9B3D-D507-5D78-9E90-060C26D3F971.dita#GUID-1B3D9B3D-D507-5D78-9E90-060C26D3F971/GUID-96C179ED-FAFF-58CE-8BBF-58A5BE82FA2F">Decoding several Contact Headers using the SIP stack </xref>  </p> </li> <li id="GUID-C3B0A1C3-9224-5E48-9112-5DB58941E99D"><p> <xref href="GUID-1B3D9B3D-D507-5D78-9E90-060C26D3F971.dita#GUID-1B3D9B3D-D507-5D78-9E90-060C26D3F971/GUID-3A587908-769D-569E-9A6A-C23CFF38DCD6">Creating a CSIPContactHeader using the SIP stack</xref>  </p> </li> </ul> <section id="GUID-F124CB52-955C-53B5-9A43-E0D9B04F539C"><title> Decoding a Contact Header using the SIP stack</title> <p>The following code snippet shows how an application decodes a Contact header that uses the SIP stack: </p> <codeblock id="GUID-4E53526F-764D-500B-B7BC-F530CDF8C1B8" xml:space="preserve">RPointerArray&lt;CSIPContactHeader&gt; headers;
_LIT8 (KThreeParams, "sip:user@localhost;expires=0;q=1.0;p=value");
headers = CSIPContactHeader::DecodeL(KThreeParams);
TInt count = headers.Count(); //count == 1
iSIPContactHeader = headers[0];
headers.Reset();
iSIPContactHeader-&gt;ExpiresParameter();//return zero
iSIPContactHeader-&gt;QParameter();//return 1.0
delete iSIPContactHeader; iSIPContactHeader = 0;
</codeblock> </section> <section id="GUID-96C179ED-FAFF-58CE-8BBF-58A5BE82FA2F"><title> Decoding several Contact Headers using the SIP stack </title> <p>The following code snippet shows how an application decodes the Contact headers that use the SIP stack: </p> <codeblock id="GUID-EBA24C46-ED9F-5105-B3FD-45E85AAE6930" xml:space="preserve">RPointerArray&lt;CSIPContactHeader&gt; headers;
_LIT8 (KHeaders1, "&lt;sip:u1@host&gt;, u2 &lt;sip:u2@host&gt; , sip:host  ");
headers = CSIPContactHeader::DecodeL(KHeaders1);
headers.Count();//return 3
headers.ResetAndDestroy();
</codeblock> </section> <section id="GUID-3A587908-769D-569E-9A6A-C23CFF38DCD6"><title>Creating a CSIPContactHeader using the SIP stack </title> <p>The following code snippet shows how an application creates <codeph>CSIPContactHeader</codeph> that uses the SIP stack : </p> <codeblock id="GUID-A467810F-B774-511F-8679-5125D3073E87" xml:space="preserve">TUriParser8 parser;
_LIT8 (KValue, "sip:user@host1");
User::LeaveIfError(parser.Parse(KValue));
CUri8* uri8 = CUri8::NewLC(parser);
CSIPAddress* sipAddress = CSIPAddress::NewL(uri8);
CleanupStack::Pop(); // uri8, ownership given to sipAddress
CleanupStack::PushL(sipAddress);
CSIPContactHeader* contactHeader = CSIPContactHeader::NewL(sipAddress);
CleanupStack::Pop(); // sipAddress, ownership given to contactHeader
</codeblock> <p> <b> Note:</b> Open the string pool before you use it. All the predefined SIP constants are in the string table, which are accessed by the string pool. At the end of handling, the SIP Codec string pool must be closed. </p> <codeblock id="GUID-2C9C0A6B-9FA6-5CE0-AF92-40C5F99D51EF" xml:space="preserve">#include "sipstrings.h"
SIPStrings::OpenL();
RStringPool pool = SIPStrings::Pool();</codeblock> </section> </conbody></concept>