如何使用已连接的接入点

2023-10-29 19:18

文章标签 使用连接接入点

本文主要是介绍如何使用已连接的接入点，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

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。

编辑本段回目录 MMP文件

LIBRARY http.lib

LIBRARY ecom.lib

LIBRARY esock.lib

LIBRARY commdb.lib

CAPABILITY NetworkServices

编辑本段回目录头文件

复制到剪贴板 C/C++代码

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

编辑本段回目录 Source file

复制到剪贴板 C/C++代码

// 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();
}

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