Download data entered via web to a text file.

Question

Hello,
I'm developing a very simple BSP aplication in which the user enters via web some data in some fields. This data is store in an internal table. This table is an attribute in the application class. In this class there is a method to save the data to a file in presentation server. I've tried using WS_DOWNLOAD and GUI_DOWNLOAD but these function modules don't work. I would like to know if there some function modules or methods to download data to a file and that can be used in a BSP aplication.
Thank you very much,
Carlos
Details:
1-Layout
<%@page language="abap"%>
<%@extension name="htmlb" prefix="htmlb"%>
Carga ficheros
  generar_fichero
      exporting nombre_fichero = fichero.
3- Method generar_fichero
method GENERAR_FICHERO .
***Opción 1: emplear una instancia de una clase y llamar a su método
data: file type ref to CL_GUI_FRONTEND_SERVICES.
create object file.
data l_filelength type i.
call method file->gui_download
   exporting  filename = nombre_fichero
   importing filelength = l_filelength
   changing   data_tab = m_tabladatos
   exceptions
      FILE_WRITE_ERROR                = 1
      NO_BATCH                        = 2
      GUI_REFUSE_FILETRANSFER         = 3
      INVALID_TYPE                    = 4
      NO_AUTHORITY                    = 5
      UNKNOWN_ERROR                   = 6
      HEADER_NOT_ALLOWED              = 7
      SEPARATOR_NOT_ALLOWED           = 8
      FILESIZE_NOT_ALLOWED            = 9
      HEADER_TOO_LONG                 = 10
      DP_ERROR_CREATE                 = 11
      DP_ERROR_SEND                   = 12
      DP_ERROR_WRITE                  = 13
      UNKNOWN_DP_ERROR                = 14
      ACCESS_DENIED                   = 15
      DP_OUT_OF_MEMORY                = 16
      DISK_FULL                       = 17
      DP_TIMEOUT                      = 18
      FILE_NOT_FOUND                  = 19
      DATAPROVIDER_EXCEPTION          = 20
      CONTROL_FLUSH_ERROR             = 21
      OTHERS                          = 22
*if sy-subrc ne 0.
raise error_fichero.
*else.
**borrar cookie
*endif.
***Opción 2: llamada directa a la función ws_download_wan "FALLA:
***********************************************"no deja rastro del fallo
data l_filename(128).
write nombre_fichero to l_filename.
*CALL FUNCTION 'WS_DOWNLOAD_WAN'
EXPORTING
  BIN_FILESIZE              = ' '
  CODEPAGE                  = ' '
  FILENAME                  = l_filename
  FILETYPE                  = 'ASC'
  MODE                      = 'A'
  WK1_N_FORMAT              = ' '
  WK1_N_SIZE                = ' '
  WK1_T_FORMAT              = ' '
  WK1_T_SIZE                = ' '
IMPORTING
  FILELENGTH                =
TABLES
   DATA_TAB                  = m_tabladatos
EXCEPTIONS
  FILE_OPEN_ERROR           = 1
  FILE_WRITE_ERROR          = 2
  INVALID_FILESIZE          = 3
  INVALID_TABLE_WIDTH       = 4
  INVALID_TYPE              = 5
  NO_BATCH                  = 6
  UNKNOWN_ERROR             = 7
  OTHERS                    = 8
*IF SY-SUBRC <> 0.
raise error_fichero.
*else.

Answer 1

Hallo Carlos,
Welcome to the forum. As with all things new in life, one does not know where to start immediately. I would like to recommend the <a href="/people/brian.mckellar/blog/2004/06/11/bsp-trouble-shooting-getting-help">Getting Help</a> guide as first interesting article to read.
Specifically you are interested in the section for searching this forum. Use keywords such as download or GUI_DOWNLOAD. Also consider to look at keyword Excel. Although not exactly on topic, the Excel discussions does address this partly. All of this has been discussed many time before.
Finally, consider to read <a href="/people/mark.finnern/blog/2003/09/23/bsp-programming-handling-of-non-html-documents">BSP Programming: Handling Of Non-HTML Documents</a>. This will really show you some different techniques to download files onto the computer.
brian