msdn upload image with winhttp c++ - c++

Question

I have been trying this the whole day but no luck i want to upload an image file to a php file which i have created but when ever i try to do that winhttpsendrequest throws 183 error that means cannot send file that is already sent please can someone point out where i am wrong
c++ code:
int _tmain(int argc, _TCHAR* argv[]) {
HINTERNET hSession = NULL,
hConnect = NULL,
hRequest = NULL;
BOOL bResults = FALSE;
FILE *pFile;
long lSize;
char *buffer;
size_t result;
pFile = fopen("blog.jpg", "rb");
fseek(pFile, 0, SEEK_END);
lSize = ftell(pFile);
rewind(pFile);
buffer = (char *) malloc(sizeof(char) * lSize);
result = fread(buffer, 1, lSize, pFile);
fclose(pFile);
hSession = WinHttpOpen( L"WinHTTP Example/1.0",
WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,
WINHTTP_NO_PROXY_NAME,
WINHTTP_NO_PROXY_BYPASS, 0);
if (hSession)
hConnect = WinHttpConnect(hSession, L"localhost",
INTERNET_DEFAULT_HTTP_PORT, 0);
if (hConnect)
hRequest = WinHttpOpenRequest(hConnect, L"POST", L"locker/upload.php",
NULL, WINHTTP_NO_REFERER,
WINHTTP_DEFAULT_ACCEPT_TYPES,
WINHTTP_FLAG_REFRESH);
static WCHAR frmdata[2048] = L"Connection: keep-alive\r\nContent-Type: multipart/form-data; -----------------------------7d82751e2bc0858\r\nContent-Disposition: form-data; name=\"file\"; filename=\"blog.jpg\"\r\nContent-Type: image/jpeg\r\n\r\n";
bResults = WinHttpSendRequest(hRequest,
frmdata, wcslen(frmdata), buffer,
lSize, wcslen(frmdata)+lSize, 0);
if (bResults) {
/*
DWORD dwBytesWritten = 0;
bResults = WinHttpWriteData(hRequest, buffer,
lSize,
&dwBytesWritten);
if (bResults) {
printf_s("Data: %d", dwBytesWritten);
}
*/
} else {
printf_s("SendReq: %d", GetLastError());
}
free(buffer);
if (hRequest) { WinHttpCloseHandle(hRequest); }
if (hConnect) { WinHttpCloseHandle(hConnect); }
if (hSession) { WinHttpCloseHandle(hSession); }
getchar();
return 0;
}
php code:
if (isset($_FILES["file"])) {
$target_path = "uploads/";
$target_path = $target_path . basename( $_FILES['file']['name']);
if(move_uploaded_file($_FILES['file']['tmp_name'], $target_path)) {
echo "The file ". basename( $_FILES['file']['name']). " has been uploaded";
} else{
echo "There was an error uploading the file, please try again!";
}
}

Answer 1

Keshav Nair.
try to this code:
CHAR postData[1024];
CHAR postData2[1024];
ZeroMemory(&postData,1024);
ZeroMemory(&postData2,1024);
WinHttpAddRequestHeaders(hRequest,L"Content-Type: multipart/form-data; boundary=----OiRBxC0fjdSEpqhd",-1L,WINHTTP_ADDREQ_FLAG_ADD);
wsprintfA(postData,"%s","----OiRBxC0fjdSEpqhd\r\nContent-Disposition: form-data; name=\"file\"; filename=\"blog.jpg\"\r\nContent-Type: image/jpeg\r\n\r\n");
wsprintfA(postData2,"%s","\r\n----OiRBxC0fjdSEpqhd\r\nContent-Disposition: form-data; name=\"submit\"\r\n\r\nSubmit\r\n----OiRBxC0fjdSEpqhd--\r\n");
bResults = WinHttpSendRequest( hRequest,
WINHTTP_NO_ADDITIONAL_HEADERS,
0, WINHTTP_NO_REQUEST_DATA, 0,
lstrlenA(postData)+lstrlenA(postData2)+lSize, NULL);
if (bResults)
{
bResults=WinHttpWriteData(hRequest,LPCVOID)postData,lstrlenA(postData),NULL);
bResults = WinHttpWriteData(hRequest, buffer, lSize, &dwBytesWritten);
bResults=WinHttpWriteData(hRequest,(LPCVOID)postData2,lstrlenA(postData2),NULL);
}
WinHttpWriteData:
POST data - postData, postData2 must be 8 bit encoding.