Converting Base64Binary to PDF document in BSP

Question

Hello SDN users,
I am trying to get and display a pdf document from a webservice which is provided as a base64binary.
The interface of the webservice tells me that the response type (the actual pdf document) is an xsd:base64Binary.
The webservice proxy class generates an RAWSTRING for the pdf document as the response from the webservice call.
So my first guess was to use following class method to convert the base64binary to a normal string
   CALL METHOD cl_http_utility=>if_http_utility~decode_base64
      EXPORTING
        encoded = lv_out_char " RAWSTRING from webservice
      RECEIVING
        decoded = lv_out_char_decoded.
My second guess was to create an xstring from this converted string via
CALL FUNCTION 'SCMS_STRING_TO_XSTRING'
      EXPORTING
        text   = lv_out_char_decoded"
        mimetype = 'APPLICATION/PDF'
      IMPORTING
        buffer = lv_out_charx.
My next assumption was to create otf-data via function module so that I can send the otf data to the http server cache.
lv_pdf_len = XSTRLEN( lv_out_charx ).
call function 'CONVERT_OTF'
    EXPORTING
      format                = 'PDF'
    IMPORTING
      bin_filesize          = lv_pdf_len
      bin_file              = lv_out_charx
    TABLES
      OTF                   = LT_OUTPUT_DATA-OTFDATA
      LINES                 = LT_LINES
    EXCEPTIONS
      err_max_linewidth     = 1
      err_format            = 2
      err_conv_not_possible = 3
      err_bad_otf           = 4
      others                = 5.
My Problem is, that I get back error code 4 which means bad otf.
Does anyone has a hint how I need to convert the base64binary from the webservice to a right format?
That would be great!

Answer 1

Hello Durairaj,
thank you very much for your answer,
is it usual that the method
CALL METHOD cl_http_utility=>if_http_utility~decode_base64
      EXPORTING
        encoded = lv_out_char " RAWSTRING from webservice
      RECEIVING
        decoded = lv_out_char_decoded.
returns a string containg something like %pdf...? This was not the case with my method call.
But on friday I found out why. the string I received from the webservice was actually an XSTRING which I found out during a debugging session. The method return parameter was declared  as RAWSTRING so I assumed that I had to convert from Base64 to STRING and then to XSTRING. When I aborted all the converting routines
if_http_utility~decode_base64
and
CALL FUNCTION 'SCMS_STRING_TO_XSTRING'
and passed the XSTRING to the ICM server cache I received the pdf I wanted.
But anyway If you could confirm my second question how a a decoded Base64 attribute should look  like I would be very happy.
Regards,
Sebastian