Re: AfxParseURL - C / C++ / MFC Discussion Boards

shuchigo_jane wrote:
why the AfxParseURL function is not working 4 me

What is the problem ?

Cédric Moonen
Software developer

Charting control

nothing wrong with d code then?
it gives me a "debug assertion failed" message,plus no value returned in bParse..

shuchigo_jane wrote:
it gives me a "debug assertion failed" message

And how are you sure that this is this code that causes the crash ? Use your debugger yo track the crash (press F5 to start and F9 to set breakpoints).

Cédric Moonen
Software developer

Charting control

shuchigo_jane wrote:
it gives me a "debug assertion failed" message,plus no value returned in bParse..

On first look there is no error in code, have check what line no is DEBUGGER showing you assertion!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

will this detailed code help tracking it??

CInternetSession session("My Session");
CHttpConnection* pServer = NULL;
CString tmpstr;
char inbuff[100000];
UINT nBytesRead;
CHttpFile* pFile = NULL;
try
{
void *szBuff=NULL;
CString URL=("http://www.yahoo.com");
BOOL bParse;
CString csSvrName;
CString csObjName;
INTERNET_PORT nPort;
DWORD dwServiceType = AFX_INET_SERVICE_HTTP;
bParse=AfxParseURL( URL, dwServiceType , csSvrName, csObjName, nPort );

pServer = session.GetHttpConnection( csSvrName, nPort);
pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_GET, url);
pFile->AddRequestHeaders(pBuf);
pFile->SendRequest();

UINT nRead = pFile->Read(szBuff, 1023);
while (nRead > 0)
{
//read file...
}
delete pFile;
delete pServer;
}
catch (CInternetException* pEx)
{
LPTSTR lpszError=NULL;
//catch errors from WinInet
pEx->GetErrorMessagelpszError,1023);
}
if(pFile==NULL)
{
AfxMessageBox("Error in openurl");
}
else
{
nBytesRead=pFile->Read(inbuff,sizeof(inbuff));
tmpstr.Format("Read %d",nBytesRead);
AfxMessageBox(tmpstr);
}// endif
session.Close();

Please use your debugger to check where it crashes. Then, if you are not able to correct the problem, give us detailed information about the crash (where it crashes, what the problem is, ...)

Cédric Moonen
Software developer

Charting control

When you trying to read:
...
UINT nRead = pFile->Read(szBuff, 1023);
...
your szBuff is NULL - initialize this buffer (i.e.: szBuff = new BYTE[1023]).

-----------
Mila

{ ShowBanner();

if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0))
{
cerr << _T("MFC Failed to initialize.\n");
return 1;
}

if (argc < 2 || !ParseOptions(argc, argv) || pszURL == NULL)
ShowUsage();

int nRetCode = 0;

CTearSession session(_T("TEAR - MFC Sample App"), dwAccessType);
CHttpConnection* pServer = NULL;
CHttpFile* pFile = NULL;
try
{
// check to see if this is a reasonable URL

CString strServerName;
CString strObject;
INTERNET_PORT nPort;
DWORD dwServiceType;

if (!AfxParseURL(pszURL, dwServiceType, strServerName, strObject, nPort) ||
dwServiceType != INTERNET_SERVICE_HTTP)
{
cerr << _T("Error: can only use URLs beginning with http://") << endl;
ThrowTearException(1);
}

if (bProgressMode)
{
cerr << _T("Opening Internet...");
VERIFY(session.EnableStatusCallback(TRUE));
}

pServer = session.GetHttpConnection(strServerName, nPort);

pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_GET,
strObject, NULL, 1, NULL, NULL, dwHttpRequestFlags);
pFile->AddRequestHeaders(szHeaders);
pFile->SendRequest();

DWORD dwRet;
pFile->QueryInfoStatusCode(dwRet);

// if access was denied, prompt the user for the password

if (dwRet == HTTP_STATUS_DENIED)
{
DWORD dwPrompt;
dwPrompt = pFile->ErrorDlg(NULL, ERROR_INTERNET_INCORRECT_PASSWORD,
FLAGS_ERROR_UI_FLAGS_GENERATE_DATA | FLAGS_ERROR_UI_FLAGS_CHANGE_OPTIONS, NULL);

// if the user cancelled the dialog, bail out

if (dwPrompt != ERROR_INTERNET_FORCE_RETRY)
{
cerr << _T("Access denied: Invalid password\n");
ThrowTearException(1);
}

pFile->SendRequest();
pFile->QueryInfoStatusCode(dwRet);
}

CString strNewLocation;
pFile->QueryInfo(HTTP_QUERY_RAW_HEADERS_CRLF, strNewLocation);

// were we redirected?
// these response status codes come from WININET.H

if (dwRet == HTTP_STATUS_MOVED ||
dwRet == HTTP_STATUS_REDIRECT ||
dwRet == HTTP_STATUS_REDIRECT_METHOD)
{
CString strNewLocation;
pFile->QueryInfo(HTTP_QUERY_RAW_HEADERS_CRLF, strNewLocation);

int nPlace = strNewLocation.Find(_T("Location: "));
if (nPlace == -1)
{
cerr << _T("Error: Site redirects with no new location") << endl;
ThrowTearException(2);
}

strNewLocation = strNewLocation.Mid(nPlace + 10);
nPlace = strNewLocation.Find('\n');
if (nPlace > 0)
strNewLocation = strNewLocation.Left(nPlace);

// close up the redirected site

pFile->Close();
delete pFile;
pServer->Close();
delete pServer;

if (bProgressMode)
{
cerr << _T("Caution: redirected to ");
cerr << (LPCTSTR) strNewLocation << endl;
}

// figure out what the old place was
if (!AfxParseURL(strNewLocation, dwServiceType, strServerName, strObject, nPort))
{
cerr << _T("Error: the redirected URL could not be parsed.") << endl;
ThrowTearException(2);
}

if (dwServiceType != INTERNET_SERVICE_HTTP)
{
cerr << _T("Error: the redirected URL does not reference a HTTP resource.") << endl;
ThrowTearException(2);
}

// try again at the new location
pServer = session.GetHttpConnection(strServerName, nPort);
pFile = pServer->OpenRequest(CHttpConnection::HTTP_VERB_GET,
strObject, NULL, 1, NULL, NULL, dwHttpRequestFlags);
pFile->AddRequestHeaders(szHeaders);
pFile->SendRequest();

pFile->QueryInfoStatusCode(dwRet);
if (dwRet != HTTP_STATUS_OK)
{
cerr << _T("Error: Got status code ") << dwRet << endl;
ThrowTearException(2);
}
}

cerr << _T("Status Code is ") << dwRet << endl;

TCHAR sz[1024];
while (pFile->ReadString(sz, 1023))
{
if (bStripMode)
StripTags(sz);
cout << sz;
}

// NOTE: Since HTTP servers normally spit back plain text, the
// above code (which reads line by line) is just fine. However,
// other data sources (eg, FTP servers) might provide binary data
// which should be handled a buffer at a time, like this:

#if 0
while (nRead > 0)
{
sz[nRead] = '\0';
if (bStripMode)
StripTags(sz);
cout << sz;
nRead = pFile->Read(sz, 1023);
}
#endif

pFile->Close();
pServer->Close();
}
catch (CInternetException* pEx)
{
// catch errors from WinINet

TCHAR szErr[1024];
pEx->GetErrorMessage(szErr, 1024);

cerr << _T("Error: (") << pEx->m_dwError << _T(") ");
cerr << szErr << endl;

nRetCode = 2;
pEx->Delete();
}
catch (CTearException* pEx)
{
// catch things wrong with parameters, etc

nRetCode = pEx->m_nErrorCode;
TRACE1("Error: Exiting with CTearException(%d)\n", nRetCode);
pEx->Delete();
}

if (pFile != NULL)
delete pFile;
if (pServer != NULL)
delete pServer;
session.Close();

return nRetCode;
}

alantop

shuchigo_jane wrote:
it gives me a "debug assertion failed" message...

Knowing what line of what file would go a long way towards solving the problem.

"The largest fire starts but with the smallest spark." - David Crow

Hi Friend,
I am creating very basic C++ checklist for developer. I have include lots of comments however I am looking for more..... Can you please let me know some of your valuable comments.

Thanks
Wink | ;)

itkid wrote:
very basic C++ checklist for developer.

Such as?! Would you mind listing one or two samples for us to get clearer what the check list is about? Then I can add some of mine.

Maxwell Chen

itkid wrote:
I am creating very basic C++ checklist for developer

1. coding guidelines (formatting, naming, constructs to avoid, etc.)OK
2. comments (redundant, missing, consistency with code)OKNOK(function comments)
3. function/procedure/method sizeOK
4. defensive programming (memory management, exception handling, variable initialization, floating point calculations)OKNOK(exception handling )
5 correctness (program logic)OK.
6. maintainability OK
7. efficiency OK

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Thank Alok,
You have given few very good point to think.
Regards
Smile | :)

Have a look at the Mozilla Code Reviewer's Guide[^].

Hi,

I am using USB development kit and i have installed corresponding driver in my system to communicate with that Kit. From my program how can send and receive data. Is it like serial port communication or will it be differed? Is there any specific ports for this?

sivaprakashshanmugam wrote:
Is it like serial port communication or will it be differed?

It's completely different. Basically, what you'll have to do is open the driver (with CreateFile function) and then, once you get the handle of your driver, you can send commands to the driver with DeviceIOControl.

If you get a USB development kit, then all the documentation should be supplied with the kit. Take a look at it.

Cédric Moonen
Software developer

Charting control

hi all,

I have created a diretory using CreateDirectorey function.
If i open a file rocky,then directory is created with the same name.
Everything is working fine.

But my problem is,If file name has space(Ex.Race car),then the directory is not created.
1.how to trim the space in between filename?
2.also it is taking only 10 characters.so if the filename is "AA000017060102021015",then directory is not created.

help me

cheers

sangeet

-- modified at 1:54 Wednesday 17th May, 2006

ramyasangeet wrote:
But my problem is,If file name has space(Ex.Race car),then the directory is not created.

It works well in my code as:

if(!CreateDirectory("Race car", NULL)) {
  AfxMessageBox("Error CreateDirectory.");
}

Maxwell Chen

I use the same coding.

if(!CreateDirectory("Race car", NULL)) { AfxMessageBox("Error CreateDirectory.");}

This is not creating directory with name Race car.

just i need to remove the space and i have to create directory with name like Racecar.

how to do that??

cheers

sangeet

Show me the error code.

if(!CreateDirectory("Race car", NULL)) {
  DWORD ErrorCode = GetLastError();
  CString sTxt;
  sTxt.Format("Error code: 0x%08X", ErrorCode);
  AfxMessageBox(sTxt);
}

Maxwell Chen

but it work
CreateDirectory("c:\\AA000017060102021015",NULL);

whitesky

i have mentioned my prgoram under and i am tryin to read the path where the acrobat reader is installed from the registry. though RegQueryInfoKey is returnin a positive result for the key, but when i query for Value 'Path' in the key the return value(szProductType) is empty

HKEY hKey = NULL;
LONG lRet = NULL;
char szProductType[1024] = { '\0' };
DWORD dwBufLen=1024;
LPDWORD Path;
int size = 8192;
LONG appExist;

TCHAR regPath[] = TEXT("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\AppPaths\\AcroRd32.exe");

appExist = RegQueryInfoKey(HKEY_LOCAL_MACHINE,NULL,NULL,NULL,NULL,NULL,NULL,Path,NULL,NULL,NULL,NULL);

lRet = RegOpenKeyEx( HKEY_LOCAL_MACHINE, (LPCWSTR)regPath, 0, KEY_ALL_ACCESS, &hKey );
lRet = RegQueryValueEx( hKey, (LPCTSTR) "Path", NULL, NULL, (LPBYTE) szProductType, &dwBufLen);

Your use of string types and casts is inconsistent and is probably causing your errors. First question, is this an ANSI or Unicode build?

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

Hi
I want to add a contect menu on the right click of Recycle Bin Folder.
Please guide me how to do this.

Thanks

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