Re: CFtpConnection GetFile cause memory leaking. Why?

From:
"Mark Salsbery [MVP]" <MarkSalsbery[MVP]@newsgroup.nospam>
Newsgroups:
microsoft.public.vc.language
Date:
Mon, 5 Nov 2007 10:43:15 -0800
Message-ID:
<AE7F4819-90D6-4671-A195-608F350D4D1C@microsoft.com>
How are you detecting the memory leak?

The calls you make get passed by MFC directly to WinInet functions, so if
there's a leak, it's in there somewhere :)

Mark

--
Mark Salsbery
Microsoft MVP - Visual C++

"Larry" <changquansheng@gmail.com> wrote in message
news:1194279583.844637.130990@k35g2000prh.googlegroups.com...

I'm trying to use CFtpConnection GetFile to download files from a
WS_FTP server. I found if I download 1000 files (Size from 17KB to
25KB ), it can cause about 10M memory leaking. When I commented out
the GetFile( ) line, there was no memorry leaking. WHY?

Following is part of my source code:

try
{
// Request a connection to Image Server
//Use default FTP Port
//Use Passive MODE
pConnect =
sess.GetFtpConnection(strISIP,strFtpUser,strFtpPwd,INTERNET_INVALID_PORT_NUMBER,TRUE);

//Change FTP folder
pConnect->SetCurrentDirectory(_T("/Transfer"));

// use a file find object to enumerate files
CFtpFileFind finder(pConnect);

// start looping
BOOL bFoundFile = finder.FindFile(_T("*.pgp"));

while ((bFoundFile==TRUE)&&(nMaxImages<MAX_IMAGE_NUM))
{
bFoundFile = finder.FindNextFile();
strRemoteName=finder.GetFileName();
strLocalName=strLocalPath+strRemoteName;

// BOOL bFailIfExists = FALSE,
//DWORD dwAttributes = FILE_ATTRIBUTE_NORMAL,
// DWORD dwFlags = FTP_TRANSFER_TYPE_BINARY,
// DWORD_PTR dwContext = 1

bGetFile=pConnect-

GetFile(strRemoteName,strLocalName,FALSE,FILE_ATTRIBUTE_NORMAL,FTP_TRANSFER_TYPE_BINARY,

1);

If get File Remove the file;
if(bGetFile==TRUE)
{
pConnect->Remove(strRemoteName);

}

nMaxImages++;

}
}
catch (CInternetException* pEx)
{
TCHAR sz[1024];
pEx->GetErrorMessage(sz, 1024);
pEx->Delete();
}

// if the connection is open, close it
if (pConnect != NULL)
{
pConnect->Close();
delete pConnect;
}

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