Re: Need Help on Http Header to add my own User-Agent with CDHTMLDialog

From:

dvd202@gmail.com

Newsgroups:

microsoft.public.vc.mfc

Date:

14 May 2006 01:49:18 -0700

Message-ID:

<1147596557.985795.121730@u72g2000cwu.googlegroups.com>

Sorry, I post again
==================================================================================
I use CDHTMLDialog to program a simple web browser, and I had a trobule
on Http Header modify.
I want add my own "User-Agent" when client use my application to browse
web.

//------------------------------------------------------------------------------------------------
#define WM_NVTO (WM_USER+1000)

class NvToParam
{
public:
    CString URL;
    DWORD Flags;
    CString TargetFrameName;
    CByteArray PostedData;
    CString Headers;
    DWORD dwPostDataLen;
};
//------------------------------------------------------------------------------------------------
LRESULT Ccdhtml_t1Dlg::OnNvTo(WPARAM wParam, LPARAM lParam)
{
    NvToParam* pNvTo = (NvToParam*)wParam;

    CDHtmlDialog::Navigate((LPCTSTR)pNvTo->URL, pNvTo->Flags,
(LPCTSTR)pNvTo->TargetFrameName, (LPCTSTR)pNvTo->Headers,
pNvTo->PostedData.GetData());

    delete pNvTo;
    return 1;
}

//------------------------------------------------------------------------------------------------
void Ccdhtml_t1Dlg::OnBeforeNavigate2(LPDISPATCH pDisp, VARIANT FAR*
URL, VARIANT FAR* Flags, VARIANT FAR* TargetFrameName, VARIANT FAR*
PostData, VARIANT FAR* Headers, BOOL FAR* Cancel)
{
        CString strHeaders(V_BSTR(Headers));

    // Check User-Agent
    if(strHeaders.Find("User-Agent:LHPBrowser 1.0") < 0)
        {
            *Cancel = TRUE; // Cancel this request

            if(!strHeaders.IsEmpty())
                strHeaders += "\r\n";
        // Add Customize Http Header
            strHeaders += "User-Agent:LHPBrowser 1.0";

            NvToParam* pNvTo = new NvToParam;
            ASSERT(V_VT(URL) == VT_BSTR);
            ASSERT(V_VT(TargetFrameName) == VT_BSTR);
            ASSERT(V_VT(PostData) == (VT_VARIANT | VT_BYREF));
            ASSERT(V_VT(Headers) == VT_BSTR);
            ASSERT(Cancel != NULL);

            USES_CONVERSION;

            VARIANT* vtPostedData = V_VARIANTREF(PostData);
            CByteArray array;
            if (V_VT(vtPostedData) & VT_ARRAY)
            {
                // must be a vector of bytes
                ASSERT(vtPostedData->parray->cDims == 1 &&
vtPostedData->parray->cbElements == 1);

                vtPostedData->vt |= VT_UI1;
                COleSafeArray safe(vtPostedData);

                DWORD dwSize = safe.GetOneDimSize();

                LPVOID pVoid;
                safe.AccessData(&pVoid);

                array.SetSize(dwSize);
                LPBYTE lpByte = array.GetData();

                memcpy(lpByte, pVoid, dwSize);

                safe.UnaccessData();
            }
            // make real parameters out of the notification

            CString strTargetFrameName(V_BSTR(TargetFrameName));
            CString strURL(V_BSTR(URL));
            DWORD nFlags = V_I4(Flags);

            //=====================================================
            pNvTo->URL = strURL;
            pNvTo->Flags = nFlags;
            pNvTo->TargetFrameName = strTargetFrameName;
            pNvTo->PostedData.Copy(array);
            pNvTo->Headers = strHeaders;
            //=====================================================

            // Post msg
            PostMessage(WM_NVTO,(WPARAM)pNvTo);

            return;
        }
    CDHtmlDialog::_OnBeforeNavigate2( pDisp, URL, Flags,
TargetFrameName, PostData, Headers, Cancel );
}

----------------------------------------------------------
After the testing, I found it will work fine on "http reqest", "http
form get" and "http form post".
But if my http form is "multipart/form-data" (upload file form), some
of the post datas will lost.

How should I fix it? Does any one can help me? Or any better method to
add http header when navigate a url?