如何使用已连接的接入点

Contents

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• 1 简介
• 2 MMP文件
• 3 头文件
• 4 Source file
• 5 相关连接

简介

你可以使用已存在的连接RConnection，用来建立到互联网的连接。这将会节省资源和内存。

RConnection可以列出已存在的连接。示例代码中我们查找已存在的连接，并通过IAP接入。如果没有选择激活的连接，那么就会创建一个新的。在示例代码中没有处理错误信息。

MMP文件

LIBRARY http.lib

LIBRARY ecom.lib

LIBRARY esock.lib

LIBRARY commdb.lib

CAPABILITY NetworkServices

头文件

#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();
    }

相关连接

TSS000056 - How can I determine active connections?