send text file using InternetWriteFile
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Thread: send text file using InternetWriteFile

  1. #1
    Join Date
    Jul 2009
    Posts
    16

    Angry send text file using InternetWriteFile

    Hi codeguru people,

    I would like to send a text file from my local directory to the server. How could I do that?

    This is what I have now, and it is not working:

    INTERNET_BUFFERS BufferIn = {0};
    BufferIn.dwStructSize = sizeof( INTERNET_BUFFERS );

    HINTERNET hSession, hConnection, hRequest;
    wchar_t hdr_buf[1024], error_buf[128];
    wchar_t query_buf[1024] = {0,};
    BOOL result;

    DWORD dwBytesRead;
    DWORD dwBytesWritten;
    BYTE pBuffer[1024];

    hSession = InternetOpen( "name", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0 );
    if( hSession == NULL )
    {
    MessageBox( g_hWndMain, L"HTTP Open failed!", L"HTTP", MB_OK );
    return FALSE;
    }

    hConnection = InternetConnect( hSession, "server name",
    INTERNET_DEFAULT_HTTP_PORT, NULL, NULL,
    INTERNET_SERVICE_HTTP, 0, 0 );
    if( hConnection == NULL )
    {
    wsprintf( error_buf, L"HTTP Connection failed (%d)", GetLastError() );
    MessageBox( g_hWndMain, error_buf, L"HTTP", MB_OK );
    InternetCloseHandle( hSession );
    return FALSE;
    }

    hRequest = HttpOpenRequest( hConnection, L"POST", "object name?",
    HTTP_VERSION, NULL, 0, INTERNET_FLAG_KEEP_CONNECTION &&
    INTERNET_FLAG_NO_CACHE_WRITE, 0 );
    if( hRequest == NULL )
    {
    wsprintf( error_buf, L"HTTP OpenRequest(POST) failed (%d)", GetLastError() );
    MessageBox( g_hWndMain, error_buf, L"HTTP", MB_OK );
    InternetCloseHandle( hConnection );
    InternetCloseHandle( hSession );
    return FALSE;
    }


    HANDLE hFile = CreateFile(TEXT("\\mytext.txt"), //File name
    GENERIC_READ, //Desired Access
    FILE_SHARE_READ, //Share Mode
    NULL, //Security Attribute
    OPEN_EXISTING, //Creation Disposition
    FILE_ATTRIBUTE_NORMAL, //Flags and Attributes
    NULL); //Template File

    if(hFile == INVALID_HANDLE_VALUE)
    {
    wsprintf( error_buf, L"file open failed (%d)", GetLastError() );
    MessageBox( g_hWndMain, error_buf, L"HTTP", MB_OK );
    InternetCloseHandle( hConnection );
    InternetCloseHandle( hSession );
    return FALSE;
    }

    BufferIn.dwBufferTotal = GetFileSize(hFile, NULL);
    printf("File size is %d\n", BufferIn.dwBufferTotal);


    if(HttpSendRequestEx(hRequest, NULL, 0, NULL,0))
    {
    DWORD sum = 0;
    do
    {
    if(!(ReadFile(hFile, pBuffer, sizeof(pBuffer), &dwBytesRead, NULL)))
    {
    MessageBox( g_hWndMain, L"Error Read File", L"HTTP", MB_OK );
    break;
    }
    if(!(InternetWriteFile(hRequest, pBuffer, dwBytesRead, &dwBytesWritten)))
    {
    MessageBox( g_hWndMain, L"Error Write File", L"HTTP", MB_OK );
    break;
    }

    sum += dwBytesWritten;
    } while(dwBytesRead == sizeof(pBuffer));

    }

    InternetCloseHandle( hRequest );
    InternetCloseHandle( hConnection );
    InternetCloseHandle( hSession );


    I'm not sure what is wrong. One thing I'm really unsure about is the third parameter in HttpOpenRequest(). What should the "object name" be? Since I want to send a text file over to the server, could this object name be the name of the text file I would like to create on the server, or does it have to be a php script?

    I also would like to ask, is InternetWriteFile the correct way to send file over to the server? I read somewhere that I don't need InternetWriteFile, just need HttpSendRequest. Is that true? Right now InternetWriteFile is giving me errors, and I don't know the reason of it. Additionally, I don't see any new text files appear on the server.

    Thanks.
    Sheri

  2. #2
    Join Date
    Nov 2003
    Location
    Portland, OR
    Posts
    801

    Re: send text file using InternetWriteFile

    OK, Sheri, several things.

    (1) Put your code into code blocks. It is impossible to read it.

    (2) If something gets you errors, you look up what they are and if you can't alter your code accordingly, post it here as well.

    (3) Why not use sockets? InternetWriteFile() is a "higher-level" wrapper function that may have a bunch of its own quirks. Look on the net, there's a bunch of examples of how to do it with sockets:
    http://www.codeproject.com/KB/cpp/WSFileTransfer.aspx

  3. #3
    Join Date
    Jul 2009
    Posts
    16

    Post Re: send text file using InternetWriteFile

    Hi

    Sorry about not using code blocks. I have pasted the code below.

    I cannot use the things shown in the link, http://www.codeproject.com/KB/cpp/WSFileTransfer.aspx, because I'm programming for Windows Mobile, using windows API. Do you know how I could do this using InternetWriteFile() or HttpSendRequest?

    Code:
    INTERNET_BUFFERS BufferIn = {0};
    BufferIn.dwStructSize = sizeof( INTERNET_BUFFERS );
    
    HINTERNET hSession, hConnection, hRequest;
    wchar_t hdr_buf[1024], error_buf[128];
    wchar_t query_buf[1024] = {0,};
    BOOL result;
    
    DWORD dwBytesRead;
    DWORD dwBytesWritten;
    BYTE pBuffer[1024];
    
    hSession = InternetOpen( "name", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0 );
    if( hSession == NULL )
    {
           MessageBox( g_hWndMain, L"HTTP Open failed!", L"HTTP", MB_OK );
           return FALSE;
    }
    
    hConnection = InternetConnect( hSession, "server name",
    INTERNET_DEFAULT_HTTP_PORT, NULL, NULL,
    INTERNET_SERVICE_HTTP, 0, 0 );
    
    if( hConnection == NULL )
    {
           wsprintf( error_buf, L"HTTP Connection failed (%d)", GetLastError() );
           MessageBox( g_hWndMain, error_buf, L"HTTP", MB_OK );
           InternetCloseHandle( hSession );
           return FALSE;
    }
    
    hRequest = HttpOpenRequest( hConnection, L"POST", "object name?",
    HTTP_VERSION, NULL, 0, INTERNET_FLAG_KEEP_CONNECTION &&
    INTERNET_FLAG_NO_CACHE_WRITE, 0 );
    if( hRequest == NULL )
    {
           wsprintf( error_buf, L"HTTP OpenRequest(POST) failed (%d)", GetLastError() );
           MessageBox( g_hWndMain, error_buf, L"HTTP", MB_OK );
           InternetCloseHandle( hConnection );
           InternetCloseHandle( hSession );
           return FALSE;
    }
    
    
    HANDLE hFile = CreateFile(TEXT("\\mytext.txt"), //File name
                                 GENERIC_READ, //Desired Access
                                 FILE_SHARE_READ, //Share Mode
                                 NULL, //Security Attribute
                                 OPEN_EXISTING, //Creation Disposition
                                 FILE_ATTRIBUTE_NORMAL, //Flags and Attributes
                                 NULL); //Template File
    
    if(hFile == INVALID_HANDLE_VALUE)
    {
           wsprintf( error_buf, L"file open failed (%d)", GetLastError() );
           MessageBox( g_hWndMain, error_buf, L"HTTP", MB_OK );
           InternetCloseHandle( hConnection );
           InternetCloseHandle( hSession );
           return FALSE;
    }
    
    BufferIn.dwBufferTotal = GetFileSize(hFile, NULL);
    printf("File size is %d\n", BufferIn.dwBufferTotal);
    
    
    if(HttpSendRequestEx(hRequest, NULL, 0, NULL,0))
    {
           DWORD sum = 0;
           do
           {
                  if(!(ReadFile(hFile, pBuffer, sizeof(pBuffer), &dwBytesRead, NULL)))
                  {
                         MessageBox( g_hWndMain, L"Error Read File", L"HTTP", MB_OK );
                         break;
                  }
                  if(!(InternetWriteFile(hRequest, pBuffer, dwBytesRead, &dwBytesWritten)))
                  {
                         MessageBox( g_hWndMain, L"Error Write File", L"HTTP", MB_OK );
                         break;
                  }
    
                  sum += dwBytesWritten;
           } while(dwBytesRead == sizeof(pBuffer));
    
    }
    
    InternetCloseHandle( hRequest );
    InternetCloseHandle( hConnection );
    InternetCloseHandle( hSession );

    Thanks.
    Sheri
    Last edited by shericn; August 24th, 2009 at 03:26 AM.

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