主要是CPI要用到WSDL文件做mapping，客户的SAP服务器不一定直接可在浏览器访问http或者https的地址，所以在SAP里面开发程序内部调用地址获取WSDL文件

*&---------------------------------------------------------------------*
*& Report YXX_GET_WSDL
*&---------------------------------------------------------------------*
*&
*&---------------------------------------------------------------------*
REPORT yxx_get_wsdl.

DATA: gv_url          TYPE string,
      gv_protocol     TYPE string,
      gv_host         TYPE rfcdisplay-rfchost,
      gv_ip           TYPE rfcdisplay-rfchost,
      gv_port         TYPE string,
      gv_resp         TYPE string,
      gv_path         TYPE string,
      gv_fullpath     TYPE string,
      gv_extension    TYPE string,
      gv_filename     TYPE string,
      go_http_client  TYPE REF TO if_http_client,
      gt_resp         TYPE TABLE OF string,
      gt_service_info TYPE TABLE OF icm_sinfo2.

SELECTION-SCREEN BEGIN OF BLOCK blk01 WITH FRAME TITLE TEXT-101.

PARAMETERS: p_rfc TYPE rs38l-name OBLIGATORY MATCHCODE OBJECT sfunc_modules.

SELECTION-SCREEN END OF BLOCK blk01.

START-OF-SELECTION.

  " 检查函数名
  SELECT SINGLE
    funcname
  FROM tfdir
  WHERE
    funcname = @p_rfc
  INTO @DATA(ls_tfdir).
  IF sy-subrc <> 0.
    MESSAGE '函数不存在' TYPE 'E'.
  ENDIF.

  " 获取ip
  gv_host = sy-host.
  CALL FUNCTION 'RFC_HOST_TO_IP'
    EXPORTING
      rfchost = gv_host
    IMPORTING
      rfcip   = gv_ip.

  " 获取http端口
  CALL FUNCTION 'ICM_GET_INFO2'
    TABLES
      servlist = gt_service_info.
  gv_port     = VALUE #( gt_service_info[ protocol = 1 ]-service OPTIONAL ). " HTTP 端口
  gv_protocol = 'http'.
  IF gv_port IS INITIAL.
    gv_port = VALUE #( gt_service_info[ protocol = 2 ]-service OPTIONAL ). " HTTPS 端口
    gv_protocol = 'https'.
  ENDIF.

  " WSDL地址 使用之前需要在SICF Service Tree中激活WSDL服务的地址才可以访问
  gv_url = |{ gv_protocol }://{ gv_ip }:{ gv_port }/sap/bc/soap/wsdl11?services={ p_rfc }&sap-client={ sy-mandt }|.

  " 调用WSDL地址
  cl_http_client=>create_by_url(
    EXPORTING
      url = gv_url
    IMPORTING
      client = go_http_client
    EXCEPTIONS
      argument_not_found = 1
      plugin_not_active  = 2
      internal_error     = 3
      OTHERS             = 4 ).
  IF sy-subrc <> 0.
    MESSAGE ID sy-msgid TYPE sy-msgty NUMBER sy-msgno WITH
               sy-msgv1 sy-msgv2 sy-msgv3 sy-msgv4.
    EXIT.
  ENDIF.

  " 设置授权
  go_http_client->request->set_content_type( content_type = 'application/xml; charset=utf-8' ).
  go_http_client->request->set_authorization( username = CONV #( sy-uname ) password = CONV string( '' ) ).
  go_http_client->authenticate( username = CONV #( sy-uname ) password = CONV string( '' ) ).
  go_http_client->request->set_method( if_http_request=>co_request_method_post ).

  " 发送请求
  go_http_client->send(  EXCEPTIONS http_communication_failure = 1
                                   http_invalid_state         = 2  ).

  " 读取远程服务返回的结果消息。
  go_http_client->receive( EXCEPTIONS http_communication_failure = 1
                                      http_invalid_state         = 2
                                      http_processing_failed     = 3 ).

  IF sy-subrc <> 0.
    "操作失败，获取失败原因
    go_http_client->get_last_error( IMPORTING message = DATA(lv_message) ).
    MESSAGE lv_message TYPE 'E'.
  ELSE.
    gv_resp = go_http_client->response->get_cdata( ).

    " 选择文件保存路径
    cl_gui_frontend_services=>file_save_dialog(
      EXPORTING
        default_extension = 'WSDL'
        default_file_name = CONV string( p_rfc )
      CHANGING
        filename          = gv_filename
        path              = gv_path
        fullpath          = gv_fullpath
      EXCEPTIONS
        OTHERS            = 1 ).

    IF sy-subrc <> 0 OR gv_fullpath IS INITIAL.
      MESSAGE '未选择文件保存路径' TYPE 'E'. " 未选择文件保存路径
      RETURN.
    ENDIF.

    APPEND gv_resp TO gt_resp.

    " 下载本地
    CALL FUNCTION 'GUI_DOWNLOAD'
      EXPORTING
        filename = gv_fullpath
        filetype = 'DAT'
      TABLES
        data_tab = gt_resp.

  ENDIF.