Question

MSXML IXMLHTTPRequest Memory Leak

Asked by: danielj

I use the following code repeatedly to get responses from a server but the object leaks memory a lot. Does anybody have a clue why and how to fix it?

Daniel.


CComPtr<IXMLHTTPRequest> xml_Request;
HRESULT hr = xml_Request.CoCreateInstance( L"Msxml2.XMLHTTP.3.0", NULL, CLSCTX_INPROC_SERVER  );
if( hr != S_OK )
{
     AfxMessageBox("Could not create the XMLDOMHttpRequest object");
     return;
}

hr = xml_Request->open( L"POST", _bstr_t( (LPCTSTR)strUrl.c_str() ), _variant_t(false),
_variant_t(""), _variant_t(""));
if(hr != S_OK)
{
      AfxMessageBox("Error open connnection");
     return;
}

hr = xml_Request->send(vOpt);
if(hr != S_OK)
{
     AfxMessageBox("Error posting");
     return;
}

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Asked On
2001-07-16 at 06:52:02ID20151376
Tags

ixmlhttprequest

Topic

C++ Programming Language

Participating Experts
4
Points
200
Comments
7

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Answers

 

by: jkrPosted on 2001-07-16 at 08:24:22ID: 6286326

>>Does anybody have a clue why and how to fix it?

How do you use 'vOpt'?

 

by: MattCPosted on 2001-07-16 at 08:47:42ID: 6286428

listening.....

 

by: danieljPosted on 2001-07-16 at 22:44:30ID: 6288540

Sorry Left that one out.
It is declared as follow:
_variant_t vOpt("");

Thanks.
Daniel.

 

by: MattCPosted on 2001-07-17 at 03:05:41ID: 6289144

are you re-using the same "xml_request" object each time or do you re-instatiate it, without killing the old object?

 

by: danieljPosted on 2001-07-17 at 03:20:24ID: 6289178

I tries it using the whole block and only from "xml_Request->open()" but no luck. The memory leak only occurs after the 30th or so loop.

CComPtr do call the Release() method after it goes out of scope.

Thanks.
Daniel.

 

by: griesshPosted on 2002-03-06 at 18:44:40ID: 6846113

I think you forgot this question. I will ask Community Support to close it unless you finalize it within 7 days.

I am not sure what to suggest here. Could somebody please shed some light on the value of this thread ... otherwise it was suggested to delete and refund.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!
======
Werner

 

by: Computer101Posted on 2002-03-06 at 18:53:42ID: 6846131

Listening,
Computer101
E-E Moderator

20120131-EE-VQP-002

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