Accessing a secure (https) server via MFC WinInet classes.

I am attempting the access a secure (https) server via the MFC WinInet
classes and I am having difficulty. I have scoured the newsgroups and
the Internet for suggestions, but I have not been able to find anything

As the MSDN Knowledgebase suggests, I use CInternetSession,
CHttpConnection and CHttpFile to connect to a server and send it a
Request. My Visual C++ 6.0 app works fine when I use
GetHttpConnection() to get a connection to a non-secure server.
However, when I name a secure server (https://...) as the URL, a
subsequent call to CHttpFile::SendRequest() always results in an
internal exception (12005--The URL is invalid).

Can the WinInet classes be used to access a secure server? If so, could
you please provide me with sample source code that shows the correct
way of doing this?


jhewson (3)
11/8/2006 6:29:49 PM
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Wow, thanks for all the helpful suggestions--this newsgroup is soooo

Anyway, I have found answers to my own questions, so thought I should
post them for the next person to see.

As is turns out, I found that I could not use "https://" in the server
URL field in the call to GetHttpConnection. For example, if the server
URL is "", I must use "". Moreover,
the port number must be set to INTERNET_DEFAULT_HTTPS_PORT (see below).

CInternetSession Session;
CHttpConnection* pConnection =

Next, if the URL includes further path info, that must be added to the
call to OpenRequest. For example, if the full URL is
"", then "/pathname" must be passed to
OpenRequest. Moreover, several flags must be passed to OpenRequest (see

CHttpFile* pFile =
pConnection->OpenRequest(CHttpConnection::HTTP_VERB_POST, "/pathname",

These modifications allowed me to access the secure server that I was


jhewson (3)
11/10/2006 3:49:57 PM
James wrote
> CHttpFile* pFile =
> pConnection->OpenRequest(CHttpConnection::HTTP_VERB_POST, "/pathname",

Hi James,

you should get a valid Certificate for this server instead of blindly
trusting *any* certificate!

Anyways, thx for the answer :)


11/10/2006 6:21:26 PM

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