Download a Smartform to Pdf from Web Dynpro Abap

This is an example to download a Smartform to PDF from a Web Dynpro Abap.
The method ONACTIONSHOW_PDF is binded to “onAction” event Button

method ONACTIONSHOW_PDF.

DATA: smartform_fm  TYPE rs38l_fnam,
bin_pdf TYPE TABLE OF docs,
bin_tline TYPE TABLE OF tline,
bin_filesize TYPE i,
bin_pdfx TYPE xstring,
v_device_type TYPE rspoptype,
v_output_options TYPE ssfcompop,
v_control_parameters TYPE ssfctrlop.

**CONVERT SMARTFORM TO BINARY XSTRING PDF
CALL FUNCTION 'SSF_GET_DEVICE_TYPE'
EXPORTING
    i_language             = 'I'
    i_application          = 'SAPDEFAULT'
IMPORTING
     e_devtype              = v_device_type
EXCEPTIONS
     no_language            = 1
     language_not_installed = 2
     no_devtype_found       = 3
     system_error           = 4
     OTHERS                 = 5.

v_output_options-tdprinter = v_device_type.
v_control_parameters-no_dialog = 'X'.
v_control_parameters-getotf = 'X'.

CALL FUNCTION 'SSF_FUNCTION_MODULE_NAME'
EXPORTING
      formname                 = 'ZSMARTFORM'
IMPORTING
      fm_name                  = smartform_fm
EXCEPTIONS
no_form                  = 1
no_function_module       = 2
OTHERS                   = 3.

CALL FUNCTION smartform_fm
EXPORTING
       control_parameters         = v_control_parameters
       output_options             = v_output_options
       id_document                = doc_id
IMPORTING
       job_output_info            = v_output_stampa
EXCEPTIONS
formatting_error           = 1
internal_error             = 2
send_error                 = 3
user_canceled              = 4
OTHERS                     = 5.

***CONVERT OTF TO PDF
CLEAR: bin_pdf,bin_tline,bin_filesize,bin_pdfx.

CALL FUNCTION 'CONVERT_OTF'
EXPORTING
      format                      = 'PDF'
IMPORTING
      bin_filesize                =  bin_filesize
      bin_file                    = bin_pdfx
TABLES
      otf                         = v_output_stampa-otfdata
      lines                       = bin_tline.

**ATTACH PDF TO RESPONSE
CL_WD_RUNTIME_SERVICES=>ATTACH_FILE_TO_RESPONSE(
i_filename = 'PDFSMARTFORM.PDF'
i_content = bin_pdfx
i_mime_type = 'application/pdf' ).

endmethod.