File attachment in ABAP Web Service – Service Consumer(Consumer Proxy)

During one of our requirement I found ABAP Consumer proxy class doesn’t create the attachment method like Java consumer proxy. We need to insert the attachment at runtime using WS protocol. Here I am going to explain the steps and code.

Assumption:

1. Web service you are going to consume has the attachment enabled

        <sapattahnd:Enabled xmlns:sapattahnd=”http://www.sap.com/710/features/attachment/“>true</sapattahnd:Enabled>

  2.  Web service is consumed and proxy class is activated

  3.  Create a Z class, method and use the code below

METHOD set_proposal.
* Author: Amaresh Pani
  DATA: lcl_obj TYPE REF TO zca_co_customerproposal,
        ls_request  TYPE  zca_send_customer_proposal_re4,
        ls_response TYPE  zca_send_customer_proposal_re3.
  TRY.
      CREATE OBJECT lcl_obj.
      CATCH cx_ai_system_fault INTO lx_fault.
      gv_msg = lx_fault->get_text( ).
  ENDTRY.
*----------------------------------------------------------------------------------------**
DATA: lo_attachments                TYPE REF TO if_wsprotocol_attachments.
DATA: g_attachment    TYPE REF TO  if_ai_attachment,
      g_attachments    TYPE          prx_attach,      "Internal table for attachment
      g_attach_xstring TYPE          xstring.          "variable of xstring type.
* binary xstring file stored in Z table
SELECT SINGLE value FROM zzupld INTO g_attach_xstring WHERE filename = 'CUST'.
TRY.
    lo_attachments ?= lcl_obj->get_protocol( if_wsprotocol=>attachments ).
    g_attachment = lo_attachments->get_attachment_from_binary(
          data = g_attach_xstring                " File content
          type = if_ai_attachment=>c_mimetype_pdf " MIME type
          name = 'CustomerProposal' ).            " Name of PDF to be uploaded
    APPEND g_attachment TO g_attachments.
    lo_attachments->set_attachments( g_attachments ).
    CATCH cx_ai_system_fault INTO lx_fault.
    gv_msg = lx_fault->get_text( ).
ENDTRY.
*----------------------------------------------------------------------------------------**
ls_request-send_customer_proposal_request-document-opprotunity_id-content = '7117941'. " Defaulted content of proxy
  TRY.
      lcl_obj->send_customer_proposal(
        EXPORTING
          send_customer_proposal_request  = ls_request
        IMPORTING
          send_customer_proposal_respons = ls_response ).
    CATCH cx_ai_system_fault INTO lx_fault.
      gv_msg = lx_fault->get_text( ).
    CATCH cx_ai_application_fault INTO lx_fault1.
      gv_msg = lx_fault->get_text( ).
  ENDTRY.
ENDMETHOD.

Content in Z table zzupld

Remember to set attachment “YES” while creating the endpoint.

Execute the method to trigger the web service with attachment. Enable payload trace in SRT_UTIL to see the file attachment.

SOAP creates tag MULTIPART. PART_1 contains the general SOAP xml content. PART_2 contains the attachment as above.