Re: Windows CE, WideCharToMultiByte, HttpSendRequestEx prob with Unic
- From: "Paul G. Tobey [eMVP]" <ptobey no spam AT no instrument no spam DOT com>
- Date: Wed, 13 Apr 2005 09:09:00 -0700
Does this have to do with managed code and the .NET Compact Framework?
According to the help for WideCharToMultiByte(), you can use CP_UTF8. Does
it not work if you do that? Give us some information about whatever failure
it is that you're observing. And you need to tell us what device or what
version of Windows CE you're talking about!
Paul T.
"Manish" <Manish@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:12D96735-4181-4905-BDFC-9A9FE9618040@xxxxxxxxxxxxxxxx
>
> We are using Internet API's like HttpSendRequestEx etc. for a pocket PC
> based application. A C++ dll is created for internet access that uses Win
> APIs for Windows CE.
>
> There is an payload (XML format) we are sending in InternetWriteFile
> function as lpBuffer parameter.
> This payload is generated in Unicode and if we send it as it is, it is not
> recognized at the server and an error is returned.
>
> The header we send in HttpSendRequestEx is _T("Content-Type: text/xml;
> charset=utf-8\nSOAPAction: /")
>
> We found out that ANSI payload works properly. SO currently we are
> converting the payload to ANSI using CP_ACP in WideCharToMultiByte, since
> the
> ANSI payload is recognized at the server properly and the request is
> working.
>
> But in order to use the code globally, we need to convert the payload in
> utf-8 or so. But Windows CE does not support the CP_UTF7 and CP_UTF8
> values
> for the CodePage parameter in WideCharToMultiByte.
>
> How to solve this problem for Windows CE? Is there any way such that the
> payload can be passed as unicode and will be recognized at the server
> properly?
>
> Regards
> Hrushi
>
>
>
> P.S
> Following is the code we are using to do the whole process of send request
> and get response.
>
> first the two handles are opened in some initproxy function and then the
> ExecRequestRetResponse function is called to do the send receive request
> using these handles. The bsOptionalPayload parameter in the
> ExecRequestRetResponse function is the payload we are talking about above.
>
> g_hOpen = InternetOpen (TEXT("DscoreHttp"),
> g_dwAccessType,//INTERNET_OPEN_TYPE_PROXY, INTERNET_OPEN_TYPE_PRECONFIG
> g_pszPRoxyServer, g_pszPRoxyBypass, 0);
>
> if(!(g_hConnect = InternetConnect (g_hOpen,
> (LPCWSTR)g_szURL, //purl, //g_szURL, //_T("172.16.235.154"),
> g_nPort,
> NULL, NULL,
> INTERNET_SERVICE_HTTP,
> 0, 0)))
> {
> hr = E_FAIL; goto exit;
> }
>
>
>
> HRESULT ExecRequestRetResponse(TCHAR* bsOptionalPayload, BOOL*
> pbFailResponse, TCHAR** ppResponse)
> {
> FDEBUGLOG (_T("ExecRequestRetResponse... Enter"), 1);
> USES_CONVERSION;
>
> LOGDBG1("REQUEST : ", bsOptionalPayload);//Added for logs
> HRESULT hr = S_OK;
> ULONG g_ulTimeOut = 3*60*1000; // 3 minutes
>
> DWORD tosend = 0, remainingbytes = 0, curstartpos = 0;
> INTERNET_BUFFERS BufferIn;
> DWORD dwBytesWritten = 0;
> BOOL bRet = FALSE;
> CComBSTR response = _T("");
> char* lpBufferW = NULL;
> TCHAR *lpHeadersW = NULL;
> HINTERNET hRequest = NULL;
> DWORD dwSize = 0;
> DWORD dwPostSize = 0;
> LPSTR pOptionalPayload = NULL;
> DWORD dwRqstChunkSize = 10*1024; // 10 K. max 25 k was working ok on
> device
> // normal rqst is approx. 3 K.
>
> DSTRY
> {
> FDEBUGLOG(_T("Before WideCharToMultiByte"), 0);
>
> int wsize = _tcslen(bsOptionalPayload) + 2;
> pOptionalPayload = (LPSTR)malloc(wsize);
> ZeroMemory(pOptionalPayload, wsize);
> if(!(WideCharToMultiByte(CP_ACP, 0, bsOptionalPayload, wsize,
> pOptionalPayload, wsize, NULL, NULL)))
> {
> DWORD dw = GetLastError();
> hr = E_FAIL;
> goto exit;
> }
>
> dwPostSize = (DWORD)strlen(pOptionalPayload);
> FDEBUGLOG(_T("Before HttpOpenRequest"), 0);
> // Open an HTTP request handle.
> if (!(hRequest = HttpOpenRequest (g_hConnect,
> TEXT("POST"),
> (LPCWSTR)(pFile), //pFile,
> HTTP_VERSION,
> NULL,
> //NULL,
> (LPCTSTR*)AcceptTypes,
> INTERNET_FLAG_RELOAD | INTERNET_FLAG_NO_CACHE_WRITE, 0)))
> {
> FDEBUGLOG (_T("HttpOpenRequest failed"),0);
> hr = E_FAIL; goto exit;
> }
>
> TCHAR header[256];
>
> _stprintf(header, _T("Content-Type: text/xml; charset=utf-8\nSOAPAction:
> /"));
>
> FDEBUGLOG(_T("Before InternetSetOption"), 0);
> if(!(InternetSetOption(hRequest, INTERNET_OPTION_SEND_TIMEOUT,
> (LPVOID)&g_ulTimeOut, sizeof(ULONG))))
> {
> FDEBUGLOG (_T("InternetSetOption failed for send timeout"),0);
> //hr = E_FAIL; goto exit; should not exit
> }
> else
> {
> FDEBUGLOG (_T("InternetSetOption passed"),0);
> }
> FDEBUGLOG(_T("Before InternetSetOption"), 0);
> if(!(InternetSetOption(hRequest, INTERNET_OPTION_RECEIVE_TIMEOUT,
> (LPVOID)&g_ulTimeOut, sizeof(ULONG))))
> {
> FDEBUGLOG (_T("InternetSetOption failed for send timeout"),0);
> //hr = E_FAIL; goto exit; should not exit
> }
> else
> {
> FDEBUGLOG (_T("InternetSetOption passed"),0);
> }
>
> BufferIn.dwStructSize = sizeof( INTERNET_BUFFERS ); // Must be set or
> error
> will occur
> BufferIn.Next = NULL;
> BufferIn.lpcszHeader = header;
> BufferIn.dwHeadersLength = _tcslen(header);
> BufferIn.dwHeadersTotal = 0;
> BufferIn.lpvBuffer = NULL;
> BufferIn.dwBufferLength = 0;
> BufferIn.dwBufferTotal = dwPostSize; // This is the only member used
> other than dwStructSize
> BufferIn.dwOffsetLow = 0;
> BufferIn.dwOffsetHigh = 0;
>
> FDEBUGLOG(_T("Before HttpSendRequestEx"), 0);
> if(!HttpSendRequestEx( hRequest, &BufferIn, NULL, 0, 0))
> {
> LOGDBG("Error on HttpSendRequestEx ");//LOGDBG(printf( "Error on
> HttpSendRequestEx %d\n",GetLastError() ));
> //return FALSE;
> hr = E_FAIL; goto exit;
> }
> // Send a request to the HTTP server.
> bRet=TRUE;
> if(dwPostSize <= dwRqstChunkSize)
> {
> FDEBUGLOG(_T("Before InternetWriteFile"), 0);
> bRet=InternetWriteFile( hRequest, pOptionalPayload, dwPostSize,
> &dwBytesWritten);
> }
> else
> {
> while(true)
> {
> remainingbytes = dwPostSize - curstartpos;
> if(!remainingbytes)
> break;
> tosend = (remainingbytes < dwRqstChunkSize ? remainingbytes :
> dwRqstChunkSize);
> FDEBUGLOG(_T("Before InternetWriteFile"), 0);
> if(!(bRet=InternetWriteFile( hRequest, (void*)(pOptionalPayload +
> curstartpos), tosend, &dwBytesWritten)))
> {
> bRet = FALSE;
> break;
> }
> if(dwBytesWritten < tosend) // may be some error
> {
> bRet = FALSE;
> break;
> }
> curstartpos += tosend;
> }
> }
>
> if(!bRet)
> {
> LOGDBG(printf( "\nError on InternetWriteFile
> %lu\n",GetLastError() ));
> hr = E_FAIL;
> goto exit;
> }
>
> FDEBUGLOG(_T("Before HttpEndRequest"), 0);
> if(!HttpEndRequest(hRequest, NULL, 0, 0))
> {
> LOGDBG(printf( "Error on HttpEndRequest %lu \n", GetLastError()));
> hr = E_FAIL;
> goto exit;
> }
>
> // Call HttpQueryInfo to find out the size of the headers.
> FDEBUGLOG(_T("Before HttpQueryInfo"), 0);
> HttpQueryInfo (hRequest, HTTP_QUERY_RAW_HEADERS_CRLF, NULL, &dwSize,
> NULL);
>
> // Allocate a block of memory for lpHeadersA.
> lpHeadersW = new TCHAR[dwSize];
>
> // Call HttpQueryInfo again to get the headers.
> FDEBUGLOG(_T("Before HttpQueryInfo"), 0);
> if (!HttpQueryInfo (hRequest,
> HTTP_QUERY_RAW_HEADERS_CRLF,
> (LPVOID) lpHeadersW, &dwSize, NULL))
> {
> FDEBUGLOG (_T("HttpQueryInfo failed in getting headers"),0);
> hr = E_FAIL; goto exit;
> }
> else
> {
> FDEBUGLOG (_T("HttpQueryInfo passed"),0);
> }
>
> // Terminate headers with NULL.
> lpHeadersW [dwSize] = '\0';
>
> // Allocate a block of memory for lpBufferW.
> lpBufferW = new char[32000];
> ZeroMemory(lpBufferW, 32000);
>
> do
> {
> FDEBUGLOG(_T("Before InternetReadFile"), 0);
> if (!InternetReadFile (hRequest, (LPVOID)lpBufferW, 32000, &dwSize))
> {
> FDEBUGLOG (_T("InternetReadFile failed"),0);
> hr = E_FAIL; goto exit;
> }
>
> if (dwSize != 0)
> {
> // Terminate headers with NULL.
> lpBufferW [dwSize] = '\0';
>
> response += A2W(lpBufferW);
>
> }
> } while (dwSize);
>
> FDEBUGLOG (_T("After InternetReadFile loop"),0);
> // check whether the request went through. else don't go further.
> if(!(_tcsstr(lpHeadersW, _T("200 OK")))) // hrushi check this
> {
> FDEBUGLOG (_T("header is showing request failure. so exiting"),0);
> *pbFailResponse = TRUE;
> }
>
> *ppResponse = _tcsdup(response);
> LOGDBG1("response received in ExecRequestRetResponse is", *ppResponse);
>
> exit:
>
> // Close the Internet handles.
> if (hRequest)
> {
> FDEBUGLOG(_T("Before InternetCloseHandle"), 0);
> InternetCloseHandle (hRequest);
> }
>
> delete lpBufferW;
> delete lpHeadersW;
>
> }
> DSCATCH
> {
> FDEBUGLOG (_T("in catch of ExecRequestRetResponse"),0);
> }
> FDEBUGLOG (_T("ExecRequestRetResponse... Exit"), -1);
> DSFREE(pOptionalPayload);
> LOGDBG("after pOptionalPayload freed");
> return hr;
> }
>
.
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