windows-nt/Source/XPSP1/NT/base/ntsetup/oobe/msobmain/htmparse.cpp

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2020-09-26 03:20:57 -05:00
#include <urlmon.h>
#include <mshtmdid.h>
#include <mshtml.h>
#include <shlobj.h>
#include "htmparse.h"
CHTMLParser::CHTMLParser()
{
m_cRef = 1;
m_hrConnected = CONNECT_E_CANNOTCONNECT;
m_dwCookie = 0;
m_pCP = NULL;
m_pMSHTML = NULL;
m_hEventTridentDone = 0;
}
CHTMLParser::~CHTMLParser()
{
if (m_pMSHTML)
m_pMSHTML->Release();
}
/////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////
/////// IUnknown implementation
///////
///////
STDMETHODIMP CHTMLParser::QueryInterface(REFIID riid, LPVOID* ppv)
{
*ppv = NULL;
if (IID_IUnknown == riid || IID_IPropertyNotifySink == riid)
{
*ppv = (LPUNKNOWN)(IPropertyNotifySink*)this;
AddRef();
return NOERROR;
}
else if (IID_IOleClientSite == riid)
{
*ppv = (IOleClientSite*)this;
AddRef();
return NOERROR;
}
else if (IID_IDispatch == riid)
{
*ppv = (IDispatch*)this;
AddRef();
return NOERROR;
}
else
{
return E_NOTIMPL;
}
}
STDMETHODIMP_(ULONG) CHTMLParser::AddRef()
{
return ++m_cRef;
}
STDMETHODIMP_(ULONG) CHTMLParser::Release()
{
if (!(--m_cRef))
delete this;
return m_cRef;
}
/////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////
/////// IPropertyNotifySink implementation
///////
///////
// Fired on change of the value of a 'bindable' property
STDMETHODIMP CHTMLParser::OnChanged(DISPID dispID)
{
if (DISPID_READYSTATE == dispID)
{
EXCEPINFO excepInfo;
UINT uArgErr;
VARIANT varResult = {0};
DISPPARAMS dispparams = {NULL, NULL, 0, 0};
// check the value of the readystate property
assert(m_pMSHTML);
if (SUCCEEDED(m_pMSHTML->Invoke(DISPID_READYSTATE,
IID_NULL,
LOCALE_SYSTEM_DEFAULT,
DISPATCH_PROPERTYGET,
&dispparams,
&varResult,
&excepInfo,
&uArgErr)))
{
assert(VT_I4 == V_VT(&varResult));
if (READYSTATE_COMPLETE == (READYSTATE)V_I4(&varResult))
SetEvent(m_hEventTridentDone);
VariantClear(&varResult);
}
}
return NOERROR;
}
STDMETHODIMP CHTMLParser::OnRequestEdit(DISPID dispID)
{
return NOERROR;
}
/////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////
/////// IOleClientSite implementation
///////
///////
STDMETHODIMP CHTMLParser::SaveObject()
{
return E_NOTIMPL;
}
STDMETHODIMP CHTMLParser::GetMoniker(DWORD dwAssign, DWORD dwWhichMoniker, IMoniker** ppmk)
{
return E_NOTIMPL;
}
STDMETHODIMP CHTMLParser::GetContainer(IOleContainer** ppContainer)
{
return E_NOTIMPL;
}
STDMETHODIMP CHTMLParser::ShowObject()
{
return E_NOTIMPL;
}
STDMETHODIMP CHTMLParser::OnShowWindow(BOOL fShow)
{
return E_NOTIMPL;
}
STDMETHODIMP CHTMLParser::RequestNewObjectLayout()
{
return E_NOTIMPL;
}
/////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////
/////// IDispatch implementation
///////
///////
STDMETHODIMP CHTMLParser::GetTypeInfoCount(UINT* pctinfo)
{
return E_NOTIMPL;
}
STDMETHODIMP CHTMLParser::GetTypeInfo(UINT iTInfo, LCID lcid, ITypeInfo** ppTInfo)
{
return E_NOTIMPL;
}
STDMETHODIMP CHTMLParser::GetIDsOfNames(REFIID riid, LPOLESTR* rgszNames, UINT cNames, LCID lcid, DISPID* rgDispId)
{
return E_NOTIMPL;
}
// MSHTML Queries for the IDispatch interface of the host through the IOleClientSite
// interface that MSHTML is passed through its implementation of IOleObject::SetClientSite()
STDMETHODIMP CHTMLParser::Invoke(DISPID dispIdMember,
REFIID riid,
LCID lcid,
WORD wFlags,
DISPPARAMS* pDispParams,
VARIANT* pvarResult,
EXCEPINFO* pExcepInfo,
UINT* puArgErr)
{
if (!pvarResult)
return E_POINTER;
switch(dispIdMember)
{
case DISPID_AMBIENT_DLCONTROL:
{
// respond to this ambient to indicate that we only want to
// download the page, but we don't want to run scripts,
// Java applets, or ActiveX controls
V_VT(pvarResult) = VT_I4;
V_I4(pvarResult) = DLCTL_DOWNLOADONLY |
DLCTL_NO_SCRIPTS |
DLCTL_NO_JAVA |
DLCTL_NO_DLACTIVEXCTLS |
DLCTL_NO_RUNACTIVEXCTLS;
break;
}
default:
return DISP_E_MEMBERNOTFOUND;
}
return NOERROR;
}
// A more traditional form of persistence.
// MSHTML performs this asynchronously as well.
HRESULT CHTMLParser::LoadURLFromFile(BSTR bstrURL)
{
HRESULT hr;
LPPERSISTFILE pPF;
// MSHTML supports file persistence for ordinary files.
if ( SUCCEEDED(hr = m_pMSHTML->QueryInterface(IID_IPersistFile, (LPVOID*) &pPF)))
{
hr = pPF->Load(bstrURL, 0);
pPF->Release();
}
return hr;
}
// This function will attached trient to a location FILE: URL, and ensure that it is ready
// to be walked
HRESULT CHTMLParser::InitForMSHTML()
{
HRESULT hr;
LPCONNECTIONPOINTCONTAINER pCPC = NULL;
LPOLEOBJECT pOleObject = NULL;
LPOLECONTROL pOleControl = NULL;
// Create an instance of an dynamic HTML document
if (FAILED(hr = CoCreateInstance( CLSID_HTMLDocument, NULL,
CLSCTX_INPROC_SERVER, IID_IHTMLDocument2,
(LPVOID*)&m_pTrident )))
{
goto Error;
}
if (FAILED(hr = m_pTrident->QueryInterface(IID_IOleObject, (LPVOID*)&pOleObject)))
{
goto Error;
}
hr = pOleObject->SetClientSite((IOleClientSite*)this);
pOleObject->Release();
if (FAILED(hr = m_pTrident->QueryInterface(IID_IOleControl, (LPVOID*)&pOleControl)))
{
goto Error;
}
hr = pOleControl->OnAmbientPropertyChange(DISPID_AMBIENT_DLCONTROL);
pOleControl->Release();
// Hook up sink to catch ready state property change
if (FAILED(hr = m_pTrident->QueryInterface(IID_IConnectionPointContainer, (LPVOID*)&pCPC)))
{
goto Error;
}
if (FAILED(hr = pCPC->FindConnectionPoint(IID_IPropertyNotifySink, &m_pCP)))
{
goto Error;
}
m_hrConnected = m_pCP->Advise((LPUNKNOWN)(IPropertyNotifySink*)this, &m_dwCookie);
Error:
if (pCPC)
pCPC->Release();
return hr;
}
// Clean up connection point
HRESULT CHTMLParser::TermForMSHTML()
{
HRESULT hr = NOERROR;
// Disconnect from property change notifications
if (SUCCEEDED(m_hrConnected))
{
hr = m_pCP->Unadvise(m_dwCookie);
}
// Release the connection point
if (m_pCP)
m_pCP->Release();
if (m_pTrident)
m_pTrident->Release();
return hr;
}
HRESULT CHTMLParser::AttachToMSHTML(BSTR bstrURL)
{
HRESULT hr;
// Release any previous instance of the HTML document pointer we might be holding on to
if(m_pMSHTML)
{
m_pMSHTML->Release();
m_pMSHTML = NULL;
}
m_pMSHTML = m_pTrident;
m_pMSHTML->AddRef();
m_hEventTridentDone = CreateEvent(NULL, TRUE, FALSE, NULL);
hr = LoadURLFromFile(bstrURL);
if (SUCCEEDED(hr) || (E_PENDING == hr))
{
if (m_hEventTridentDone)
{
MSG msg;
DWORD dwRetCode;
HANDLE hEventList[1];
hEventList[0] = m_hEventTridentDone;
while (TRUE)
{
// We will wait on window messages and also the named event.
dwRetCode = MsgWaitForMultipleObjects(1,
&hEventList[0],
FALSE,
300000, // 5 minutes
QS_ALLINPUT);
// Determine why we came out of MsgWaitForMultipleObjects(). If
// we timed out then let's do some TrialWatcher work. Otherwise
// process the message that woke us up.
if (WAIT_TIMEOUT == dwRetCode)
{
break;
}
else if (WAIT_OBJECT_0 == dwRetCode)
{
break;
}
else if (WAIT_OBJECT_0 + 1 == dwRetCode)
{
// Process all messages in the Queue, since MsgWaitForMultipleObjects
// will not do this for us
while (TRUE)
{
if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
if (WM_QUIT == msg.message)
{
break;
}
else
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
else
{
break;
}
}
}
}
CloseHandle(m_hEventTridentDone);
m_hEventTridentDone = 0;
}
else
{
// If we were pending, and we could not wait, we got a problem...
if(E_PENDING == hr)
hr = E_FAIL;
}
}
return (hr);
}
HRESULT CHTMLParser::AttachToDocument(IWebBrowser2 *lpWebBrowser)
{
HRESULT hr;
LPDISPATCH pDisp;
// Release any previous instance of the HTML document pointer we might be holding on to
if(m_pMSHTML)
{
// If the m_pMSHMTL is NOT our internal Trident object (for walking files)
// then sombody did not do a detach, so we need to release the previous
// MSHTML object
if (m_pMSHTML != m_pTrident)
m_pMSHTML->Release();
m_pMSHTML = NULL;
}
// Make sure we have a webbrowser to grab onto
assert(lpWebBrowser);
// Get the document pointer from this webbrowser.
if (SUCCEEDED(hr = lpWebBrowser->get_Document(&pDisp)))
{
if (pDisp)
{
hr = pDisp->QueryInterface( IID_IHTMLDocument2, (LPVOID*)&m_pMSHTML );
// Paranoia, but trident/shdocvw might say OK, but really not give us a document
if (!m_pMSHTML)
hr = E_FAIL;
pDisp->Release();
}
else
{
hr = E_FAIL;
}
}
return (hr);
}
HRESULT CHTMLParser::Detach()
{
if(m_pMSHTML)
{
// If the m_pMSHMTL is NOT our internal Trident object (for walking files)
// then sombody did not do a detach, so we need to release the previous
// MSHTML object
if (m_pMSHTML != m_pTrident)
m_pMSHTML->Release();
m_pMSHTML = NULL;
}
return S_OK;
}
HRESULT CHTMLParser::ConcatURLValue(BSTR bstrValue, BSTR bstrName, WCHAR* lpszQuery)
{
if(bstrName)
{
// Append the Name
lstrcat(lpszQuery, bstrName);
lstrcat(lpszQuery, cszEquals);
if(bstrValue)
{
//we need to be three times as big since 1 char decoded == 3 char encoded
size_t cch = (lstrlen(bstrValue) + 1) * 3;
WCHAR* szVal = (WCHAR*)malloc(BYTES_REQUIRED_BY_CCH(cch));
lstrcpy(szVal, bstrValue);
URLEncode(szVal, cch);
lstrcat(lpszQuery, szVal);
free(szVal);
SysFreeString(bstrValue);
}
lstrcat(lpszQuery, cszAmpersand);
SysFreeString(bstrName);
}
return S_OK;
}
HRESULT CHTMLParser::CreateQueryString
(
IHTMLFormElement *pForm,
LPWSTR lpszQuery
)
{
VARIANT vIndex;
HRESULT hr = E_FAIL;
long lFormLength = 0;
VARIANT var2 = { 0 };
LPDISPATCH pDisp = NULL;
IHTMLButtonElement* pButton = NULL;
IHTMLInputButtonElement* pInputButton = NULL;
IHTMLInputFileElement* pInputFile = NULL;
IHTMLInputHiddenElement* pInputHidden = NULL;
IHTMLInputTextElement* pInputText = NULL;
IHTMLSelectElement* pSelect = NULL;
IHTMLTextAreaElement* pTextArea = NULL;
IHTMLOptionButtonElement* pOptionButton = NULL;
BSTR bstrName = NULL;
BSTR bstrValue = NULL;
vIndex.vt = VT_UINT;
if (SUCCEEDED(pForm->get_length(&lFormLength)))
{
for (int i = 0; i < lFormLength; i++)
{
vIndex.lVal = i;
if (SUCCEEDED(hr = pForm->item( vIndex, var2, &pDisp )))
{
if (SUCCEEDED(hr = pDisp->QueryInterface( IID_IHTMLInputHiddenElement, (LPVOID*)&pInputHidden )))
{
//We could take out the repetative calls to get_name/get_value but that would require
//us to make a sketchy cast
if (SUCCEEDED(pInputHidden->get_name(&bstrName)) &&
SUCCEEDED(pInputHidden->get_value(&bstrValue)))
{
ConcatURLValue(bstrValue, bstrName, lpszQuery);
}
// Release the interface pointer
pInputHidden->Release();
continue;
}
if (SUCCEEDED(hr = pDisp->QueryInterface( IID_IHTMLInputTextElement, (LPVOID*)&pInputText )))
{
if (SUCCEEDED(pInputText->get_name(&bstrName)) &&
SUCCEEDED(pInputText->get_value(&bstrValue)) )
{
ConcatURLValue(bstrValue, bstrName, lpszQuery);
}
// Release the interface pointer
pInputText->Release();
continue;
}
if (SUCCEEDED(hr = pDisp->QueryInterface( IID_IHTMLSelectElement, (LPVOID*)&pSelect )))
{
if (SUCCEEDED(pSelect->get_name(&bstrName)) &&
SUCCEEDED(pSelect->get_value(&bstrValue)) )
{
ConcatURLValue(bstrValue, bstrName, lpszQuery);
}
// Release the interface pointer
pSelect->Release();
continue;
}
if (SUCCEEDED(hr = pDisp->QueryInterface( IID_IHTMLTextAreaElement, (LPVOID*)&pTextArea )))
{
if (SUCCEEDED(pTextArea->get_name(&bstrName)) &&
SUCCEEDED(pTextArea->get_value(&bstrValue)) )
{
ConcatURLValue(bstrValue, bstrName, lpszQuery);
}
// Release the interface pointer
pTextArea->Release();
}
// First check to see if this is an OptionButton.
if (SUCCEEDED(hr = pDisp->QueryInterface( IID_IHTMLOptionButtonElement, (LPVOID*)&pOptionButton )))
{
BSTR bstr = NULL;
// See if it is a Radio or a CheckBox
if (SUCCEEDED(pOptionButton->get_type(&bstr)))
{
LPWSTR lpszType = bstr;
if ((lstrcmpi(lpszType, L"radio") == 0) || (lstrcmpi(lpszType, L"checkbox") == 0))
{
short bChecked;
// See if the button is checked. If it is, then it needs to be
// added to the query string
if (SUCCEEDED(pOptionButton->get_checked(&bChecked)))
{
if(bChecked)
{
if ( SUCCEEDED(pOptionButton->get_name(&bstrName)) &&
SUCCEEDED(pOptionButton->get_value(&bstrValue)) )
{
ConcatURLValue(bstrValue, bstrName, lpszQuery);
}
}
}
}
SysFreeString(bstr);
}
// Release the interface
pOptionButton->Release();
continue;
}
// For the rest we need to form Name=Value pairs
if (SUCCEEDED(hr = pDisp->QueryInterface( IID_IHTMLButtonElement, (LPVOID*)&pButton )))
{
if (SUCCEEDED(pButton->get_name(&bstrName)) &&
SUCCEEDED(pButton->get_value(&bstrValue)) )
{
ConcatURLValue(bstrValue, bstrName, lpszQuery);
}
// Release the interface pointer
pButton->Release();
continue;
}
if (SUCCEEDED(hr = pDisp->QueryInterface( IID_IHTMLInputFileElement, (LPVOID*)&pInputFile )))
{
if (SUCCEEDED(pInputFile->get_name(&bstrName)) &&
SUCCEEDED(pInputFile->get_value(&bstrValue)) )
{
ConcatURLValue(bstrValue, bstrName, lpszQuery);
}
// Release the interface pointer
pInputFile->Release();
continue;
}
pDisp->Release();
}
}
}
// Null out the last Ampersand, since we don't know when we added the last pair, so we got
// a trailing ampersand
lpszQuery[lstrlen(lpszQuery)-1] = L'\0';
return S_OK;
}
HRESULT CHTMLParser::get_QueryStringForForm(IDispatch* pDisp, WCHAR* szUrl)
{
HRESULT hr = E_FAIL; //don't assume succeess
WCHAR szQuery [MAX_PATH*7] = L"\0";
IHTMLFormElement* pForm = NULL;
BSTR bstrAction = NULL;
if (!pDisp)
return (E_FAIL);
if(SUCCEEDED(pDisp->QueryInterface(IID_IHTMLFormElement, (void**)&pForm)) && pForm)
{
// Get the Action for the Next Form
if (SUCCEEDED(pForm->get_action(&bstrAction)) && bstrAction)
{
lstrcpy(szUrl, bstrAction);
lstrcat(szUrl, cszQuestion);
SysFreeString(bstrAction);
// Get the Query String
if (SUCCEEDED(CreateQueryString(pForm, szQuery)))
{
lstrcat(szUrl, szQuery);
}
}
}
return hr;
}
void CHTMLParser::URLEncode(WCHAR* pszUrl, size_t cchUrlMax)
{
assert(pszUrl);
WCHAR* pszEncoded = NULL;
WCHAR* pchEncoded = NULL;
WCHAR* pchUrl = pszUrl + lstrlen(pszUrl);
int cchUrl = (int)(pchUrl-pszUrl);
WCHAR c;
if ((size_t)(cchUrl * 3) < cchUrlMax)
{
pszEncoded = (WCHAR*)malloc(BYTES_REQUIRED_BY_CCH(cchUrl * 3 + 1));
if(pszEncoded)
{
ZeroMemory(pszEncoded, BYTES_REQUIRED_BY_CCH(cchUrl * 3 + 1));
for(pchUrl = pszUrl, pchEncoded = pszEncoded;
L'\0' != *pchUrl;
pchUrl++
)
{
switch(*pchUrl)
{
case L' ': //SPACE
lstrcpyn(pchEncoded, L"+", 1);
pchEncoded+=1;
break;
case L'#':
lstrcpyn(pchEncoded, L"%23", 3);
pchEncoded+=3;
break;
case L'&':
lstrcpyn(pchEncoded, L"%26", 3);
pchEncoded+=3;
break;
case L'%':
lstrcpyn(pchEncoded, L"%25", 3);
pchEncoded+=3;
break;
case L'=':
lstrcpyn(pchEncoded, L"%3D", 3);
pchEncoded+=3;
break;
case L'<':
lstrcpyn(pchEncoded, L"%3C", 3);
pchEncoded+=3;
break;
case L'+':
lstrcpyn(pchEncoded, L"%2B", 3);
pchEncoded += 3;
break;
default:
*pchEncoded++ = *pchUrl;
break;
}
}
// String should be null-terminated since the buffer was zeroed
//
ASSERT(L'\0' == *pchEncoded);
// Did we overflow the buffer?
//
ASSERT(pchEncoded - pszEncoded < cchUrlMax);
lstrcpy(pszUrl , pszEncoded);
free(pszEncoded);
}
}
}