(VB6) Send cookies to the webserver, with cHttpRequest ?

[CouinCouin]

Hi Vladimir :)

I use the cHttpRequest dll and I would know if it is possible to send cookies to the webserver from the VB6 Sub?

Here is my VB6 code:

    Dim req As New cHttpRequest
	
    With req
        .SetTimeouts 500, 500, 500, 500
        .Open_ "POST", "http://192.168.0.250/forum/external.php", True
        .SetRequestHeader "Content-Type", "application/x-www-form-urlencoded; charset=""UTF-8"""
        .SetRequestHeader "Cookie", "cookietosend=" & cookievalue & "; Path=/"
        .Option_(WinHttpRequestOption_SslErrorIgnoreFlags) = 13056 '&H3300
        .Send "&username=" & username & _
            "&password=" & Password
        DoEvents
        .WaitForResponse
        Debug.Print .ResponseText
    End With

Here is my external.php code:

   print("Cookies received by the server:\n\r");
   foreach ($_COOKIE as $k => $v) {
      print "   $k = $v\n\r";
   }
   print "End of php script";

The VB6 console show only:

Cookies received by the server:

End of php script

I tried .SetRequestHeader "Set-Cookie" instead of .SetRequestHeader "Cookie" but nothing better.

A small idea ? :)

Thanks ! :D
Couin

[wqweto]

Host, Cookie and Content-Length headers are controlled internally by cHttpRequest so any custom values set by SetRequestHeader are ignored (because of redirects handling).

You can tweak cHttpRequest source code by making function pvSetCookie public (like in latest commit 3ff1d44) which will allow injecting custom cookies for each domain+path pair. This way instead of .SetRequestHeader "Cookie", "cookietosend=" & cookievalue & "; Path=/" one will be able to use .SetCookie "192.168.0.250", "/", "cookietosend=" & cookievalue

I'll include this tweak in next release too.

[CouinCouin]

Hi again :)

Thanks for your answer.
Oh, so "Content-Type" SetRequestHeader is to remove also ?

About tweak, why not, but I use the dll https://github.com/wqweto/VbAsyncSocket/releases/download/HRR-1.0.3/HttpRequest.zip you provided me few monthes ago.
I did not updated to 1.0.4 and I see it is missing in 1.0.5. I don't know how to create/modify a dll :(

[wqweto]

If you cannot tweak SetCookie in your setup you'll have to wait for the next binary release which will include the fix.

Btw, Content-Type is different than Content-Length so Content-Type header is fine/supported.

[CouinCouin]

Thanks :)
Also, in the archive, if there are all files needed to build the dll, if you have some little guidelines ?

[wqweto]

The project to build HttpRequest.dll is in contrib/dll directory.

Keep in mind that you'll have to switch cHttpRequest class to public before building the binary.

[CouinCouin]

Thanks for the info :)
Can the DLL be buit from VB6 IDE? Or should I need another software?
Edit: I just saw that opening in the VB6 IDE, purpose in the menu, to Make the dll, but I get a "No creatable public component detected", even by changing to Public" instead of "Private this line :
Private Property Get pvAddressOfReaderCallback() As cHttpRequest

[wqweto]

You'll have to switch cHttpRequest class to public before building the binary.

[CouinCouin]

Oh sorry, I though about the procedure.
In the cclass properties, I have:
1- Private
2- PublicNotCreatable
5- MultiUse
6- GlobalMultiuse

3 and 4 choices are missing, I don' know if normal or not. Shoudl I should 5 or 6 instead ?
Thanks :)

[wqweto]

I just added precompiled HttpRequest.zip binary to 1.0.5 release.

[CouinCouin]

Hi, I was just trying compilation, I tried MultiUse and GlobalMultiUse, the genretaed dll looks OK (actually testing on a XP virtualbox machine, not at home to test on usual win 10 where I work on VB6 code) : the server displays well the cookie I sent, in the Immediate area.
I tried also your compiled dll, but I get nothing displayed.
I noticed your DLL has a size of 528 kb, mine 504 kb.

Edit : In the IDE mine is OK yours not, but in compiled EXE , yours is OK , mine not, do you have an idea ? :)

[wqweto]

Could be DLL registration issue. Unregister both DLLs with regsvr32 /u and then register the one you want to use in IDE.

I'm releasing digitally signed binaries so the increase of size you are noticing is from the embedded signature.

Edit: This might not be such a good idea because now I remember we had performance problems with certificates on DLLs being checked by Windows which needs access to servers on the network.

[CouinCouin]

Hi Vladimir,
Okay for the dll filesize, I understand :)
Also, I tested to adding directly the 4 files (cAsyncSocket.cls, cHttpRequest.cls, cTlsSocket.cls and mdTlsThunks.bas) and unchecking the "Http Request Replacement" reference to/from the project and it looks running well, on XP and 10.
Test server seems to receive the cookies I send with "SetCookie" function.
So now, I should not have to register the DLL (with the potential problem you noticed about windows checking certificate) - I assume that with itnegrating classes and module directly, there is not checking anymore(?).
Thanks again for your great help :)

[wqweto]

So now, I should not have to register the DLL

Yes, this way you are linking the component in your final executable.

This is how modern languages work (incl. TwinBasic), by sharing source code components and linking these in final executable.

[CouinCouin]

Thanks :) I find also better too like that :)