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Using an already active connection on Symbian

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[[Category:Symbian C++]][[Category:Networking]][[Category:Code Examples]][[Category:Code Snippet]]
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[[Category:Symbian C++]][[Category:Networking]][[Category:Code Snippet]][[Category:Code Snippet]][[Category:S60 3rd Edition (initial release)]][[Category:S60 3rd Edition FP1]][[Category:S60 3rd Edition FP2]]
__NOTOC__
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|id=CS000825
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|platform=S60 3rd Edition<br>S60 3rd Edition, FP1
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|devices=Nokia E90 Communicator, Nokia N95
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|creationdate=20080215
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|keywords=RHTTPSession, RSocketServ, RConnection, TCommDbConnPref, TConnectionInfoBuf
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|platform= S60 3rd Edition<br>S60 3rd Edition, FP1
|capabilities=NetworkServices
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|author=[[User:Tepaa]]
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|dependencies= <!-- Any other/external dependencies e.g.: Google Maps Api v1.0 -->
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|signing= Self Signed
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|capabilities= NetworkServices
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|keywords= RHTTPSession, RSocketServ, RConnection, TCommDbConnPref, TConnectionInfoBuf
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}}
  
 
==Overview==
 
==Overview==
  
You can use an already active <tt>RConnection</tt> to establish a connection to the Internet. This saves resources and memory.  
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{{Abstract|You can use an already active {{Icode|RConnection}} to establish a connection to the Internet. This saves resources and memory. }}
  
<tt>RConnection</tt> has enumeration of the active connections. The source code finds active connections and attaches to the selected connection via the IAP. If there is no selected active connection, a new one is created. Errors are not handled in the source code.
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{{Icode|RConnection}} has enumeration of the active connections. The source code finds active connections and attaches to the selected connection via the IAP. If there is no selected active connection, a new one is created. Errors are not handled in the source code.
  
 
==MMP file==
 
==MMP file==
  
 
<code text>
 
<code text>
LIBRARY     http.lib
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LIBRARY http.lib
LIBRARY     ecom.lib
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LIBRARY ecom.lib
LIBRARY     esock.lib
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LIBRARY esock.lib
LIBRARY     commdb.lib
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LIBRARY commdb.lib
CAPABILITY   NetworkServices
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CAPABILITY NetworkServices
 
</code>
 
</code>
  
 
==Header file==
 
==Header file==
  
<code>  
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<code cpp>  
 
#include <http.h>
 
#include <http.h>
 
#include <es_sock.h>
 
#include <es_sock.h>
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==Source file==
 
==Source file==
  
<code>
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<code cpp>
 
// Selected IAP
 
// Selected IAP
 
TInt selectedIap=6;
 
TInt selectedIap=6;
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==See also==
 
==See also==
[[TSS000056 - How can I determine active connections?]]
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[[How can I determine active connections using Symbian C++?]]
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<!-- Translation --> [[zh-hans:如何使用已连接的接入点]]

Latest revision as of 09:21, 13 September 2012

Article Metadata

Tested with
Devices(s): Nokia E90 Communicator, Nokia N95

Compatibility
Platform(s): S60 3rd Edition
S60 3rd Edition, FP1

Platform Security
Signing Required: Self Signed
Capabilities: NetworkServices

Article
Keywords: RHTTPSession, RSocketServ, RConnection, TCommDbConnPref, TConnectionInfoBuf
Created: tepaa (15 Feb 2008)
Last edited: hamishwillee (13 Sep 2012)

Contents

Overview

You can use an already active RConnection to establish a connection to the Internet. This saves resources and memory.

RConnection has enumeration of the active connections. The source code finds active connections and attaches to the selected connection via the IAP. If there is no selected active connection, a new one is created. Errors are not handled in the source code.

MMP file

LIBRARY http.lib
LIBRARY ecom.lib
LIBRARY esock.lib
LIBRARY commdb.lib
CAPABILITY NetworkServices

Header file

#include <http.h>
#include <es_sock.h>
#include <commdbconnpref.h>


Source file

// Selected IAP
TInt selectedIap=6;
 
// Open socket server and connection
RHTTPSession session; // TODO: Set to your class member variable
RSocketServ socketServ; // TODO: Set to your class member variable
RConnection connection; // TODO: Set to your class member variable
TCommDbConnPref connPref; // TODO: Set to your class member variable
socketServ.Connect();
connection.Open(iSocketServ);
 
// Search through existing connections.
// If there is already a connection that matches the given IAP, try to attach to
// existing connection.
TBool connected(EFalse);
TConnectionInfoBuf connInfo;
TUint count;
if ( connection.EnumerateConnections(count) == KErrNone )
{
for (TUint i=1; i<=count; i++)
{
// Note: GetConnectionInfo expects 1-based index
if ( connection.GetConnectionInfo( i, connInfo ) == KErrNone )
{
if ( connInfo().iIapId == selectedIap )
{
if ( connection.Attach(connInfo, RConnection::EAttachTypeNormal)
== KErrNone )
{
connected = ETrue;
break;
}
}
}
}
}
 
// Is there an active connection?
if ( !connected )
{
// Could not attach to the existing connection.
// => Start a new connection.
connPref.SetDialogPreference(ECommDbDialogPrefDoNotPrompt);
connPref.SetIapId(selectedIap);
connection.Start(connPref);
}
 
// Open session
session.OpenL();
 
// Set the session's connection info...
RStringPool strPool = session.StringPool();
RHTTPConnectionInfo connInfo = session.ConnectionInfo();
 
// ...to use the socket server
connInfo.SetPropertyL ( strPool.StringF(HTTP::EHttpSocketServ,
RHTTPSession::GetTable() ), THTTPHdrVal (socketServ.Handle()) );
 
// ...to use the connection
connInfo.SetPropertyL ( strPool.StringF(HTTP::EHttpSocketConnection,
RHTTPSession::GetTable() ),
THTTPHdrVal (REINTERPRET_CAST(TInt, &(connection))) );
 
 
 
 
// TODO: Remember to close handles in your class destructor, such as:
CYourClass::~CYourClass()
{
session.Close(); // Close handles in this order
connection.Close();
socketServ.Close();
}

See also

How can I determine active connections using Symbian C++?

This page was last modified on 13 September 2012, at 09:21.
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