如何获取远程服务器上某个文件的名字和大小??

Question

在远程服务器上有个文件 http://www.xxxx.com/123/vc.rar
请问如何获取它的文件名和大小??
谢谢~~~~~~~~
具体代码更好

Answer 1

用wininet库，FtpFindFirstFile ，InternetFindNextFile ，FtpGetFileSize，InternetReadFileEx等都可以，ftp的容易得到大小，http的需要读出来。
int WINAPI DisplayDir(HWND hX, DWORD dwFlags)
{
    WIN32_FIND_DATA pDirInfo;
    HINTERNET hDir;
    DWORD dError;
    char DirList[MAX_PATH];
    DWORD dwTemp=MAX_PATH;
    LPDWORD temp =&dwTemp;
    LPVOID lpOption;
    DWORD dwSize;
    LPDWORD lpdwSize = &dwSize;SendDlgItemMessage(hX,IDC_FTPList,LB_RESETCONTENT,0,0);
    if ( !(hDir = FtpFindFirstFile (hSecondary, TEXT ("*.*"), &pDirInfo,
        dwFlags, 0) ))
        if (GetLastError()  == ERROR_NO_MORE_FILES) 
        {
            MessageBox(hX,"There are no files here!!!","Display Dir",MB_OK);
            InternetCloseHandle(hDir);
            return 1;
        }
        else 
        {
            ErrorOut (hX, GetLastError (), "FindFirst error: ");
            InternetCloseHandle(hDir);
            return 0;
        }        sprintf(DirList, pDirInfo.cFileName);
        if (pDirInfo.dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY)
            strcat(DirList," <DIR> ");
    
        SendDlgItemMessage(hX,IDC_FTPList,LB_ADDSTRING,0,(LPARAM)DirList);    dError = NO_ERROR;
    do
    {
         if (!InternetFindNextFile (hDir, &pDirInfo))
         {
             dError = GetLastError();
             if ( dError == ERROR_NO_MORE_FILES ) 
             {
                 InternetCloseHandle(hDir);
                 return 1;
             }
             else
             {
                 ErrorOut (hX,GetLastError(), "InternetFindNextFile");
                 InternetCloseHandle(hDir);
                 return 0;
             }
         }
         else
         {
            sprintf(DirList, pDirInfo.cFileName);
            if (pDirInfo.dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY)
                strcat(DirList," <DIR> ");    
            SendDlgItemMessage(hX,IDC_FTPList,LB_ADDSTRING,0,
                (LPARAM)DirList);
         }
    }
    while ( TRUE);    if (!InternetCloseHandle(hDir) )
    {
        InternetCloseHandle(hDir);
        ErrorOut (hX,GetLastError(), "InternetCloseHandle error");
        return 0;
    }
    else
        return 1;}int WINAPI Dumper(HWND hX, int intCtrlID, HINTERNET hResource)
{
     LPSTR    lpszData;      // buffer for the data
     DWORD    dwSize;        // size of the data available
     DWORD    dwDownloaded;  // size of the downloaded data
     DWORD    dwSizeSum=0;   // size of the data in the textbox
     LPSTR    lpszHolding;   // buffer to merge the textbox data and buffer     // Set the cursor to an hourglass.
     SetCursor(LoadCursor(NULL,IDC_WAIT));     // This loop handles reading the data.  
     do
     {
          // The call to InternetQueryDataAvailable determines the amount
  // of data available to download.
          if (!InternetQueryDataAvailable(hResource,&dwSize,0,0))
          {
               ErrorOut(hX,GetLastError(),"InternetReadFile");
               SetCursor(LoadCursor(NULL,IDC_ARROW));
               return FALSE;
          }
          else
          {     
                // Allocate a buffer of the size returned by
                // InternetQueryDataAvailable.
               lpszData = new char[dwSize+1];               // Read the data from the HINTERNET handle.
               if(!InternetReadFile(hResource,(LPVOID)lpszData,dwSize,&dwDownloaded))
               {
                    ErrorOut(hX,GetLastError(),"InternetReadFile");
                    delete[] lpszData;
                    break;
               }
               else
               {
                    // Add a null terminator to the end of the data buffer.
                    lpszData[dwDownloaded]='\0';                    // Allocate the holding buffer.
                    lpszHolding = new char[dwSizeSum + dwDownloaded + 1];
                    
                    // Check if there has been any data written to the textbox.
                    if (dwSizeSum != 0)
                    {
                         // Retrieve the data stored in the textbox if any.
                         GetDlgItemText(hX,intCtrlID,(LPSTR)lpszHolding,dwSizeSum);
                         
                         // Add a null terminator at the end of the textbox data.
                         lpszHolding[dwSizeSum]='\0';
                    }
                    else
                    {
                         // Make the holding buffer an empty string. 
                         lpszHolding[0]='\0';
                    }                    // Add the new data to the holding buffer
                    strcat(lpszHolding,lpszData);                    // Write the holding buffer to the textbox.
                    SetDlgItemText(hX,intCtrlID,(LPSTR)lpszHolding);                    // Delete the two buffers.
                    delete[] lpszHolding;
                    delete[] lpszData;                    // Add the size of the downloaded data to the textbox data size.
                    dwSizeSum = dwSizeSum + dwDownloaded + 1;                    // Check the size of the remaining data.  If it is zero, break.
                    if (dwDownloaded == 0)
                         break;
               }
          }
     }
     while(TRUE);     // Close the HINTERNET handle.
     InternetCloseHandle(hResource);     // Set the cursor back to an arrow.
     SetCursor(LoadCursor(NULL,IDC_ARROW));     // Return
     return TRUE;
}