今天分享一個S4HC的ODATA 接口

這是一個維護PM中設備的的扣子

REPORT  YTEST029.
DATA: LO_HTTP_CLIENT TYPE REF TO IF_HTTP_CLIENT.
DATA: LO_HTTP_CLIENT2 TYPE REF TO IF_HTTP_CLIENT.
DATA: RESPONSE TYPE STRING.
DATA:IV_URL TYPE STRING.

根據SM59中配置的鏈接創建HTTP請求對象
CALL METHOD CL_HTTP_CLIENT=>CREATE_BY_DESTINATION
  EXPORTING    "URL                = 'https://********.s4hana.ondemand.com:443/sap/opu/odata/sap/API_EQUIPMENT'
    DESTINATION        = 'S4H_CLOUD_TEST'"ME->DEST
  IMPORTING
    CLIENT             = LO_HTTP_CLIENT
  EXCEPTIONS
    ARGUMENT_NOT_FOUND = 1
    PLUGIN_NOT_ACTIVE  = 2
    INTERNAL_ERROR     = 3
    OTHERS             = 4.

IF SY-SUBRC <> 0.
  "error handling
ENDIF.

ODATA 接口必須啟用COOKIE
LO_HTTP_CLIENT->PROPERTYTYPE_ACCEPT_COOKIE = IF_HTTP_CLIENT=>CO_ENABLED.

DATA:IV_URL2 TYPE STRING.
IV_URL2 = |/sap/opu/odata/sap/API_EQUIPMENT|.
或者的TOKEN是API_EQUIOMENT的
CALL METHOD CL_HTTP_UTILITY=>SET_REQUEST_URI
  EXPORTING
    REQUEST = LO_HTTP_CLIENT->REQUEST
    URI     = IV_URL2.

設置表頭參數
LO_HTTP_CLIENT->REQUEST->SET_HEADER_FIELD(
  NAME  = 'x-csrf-token'
  VALUE = 'fetch' ).
這是獲取Token
LO_HTTP_CLIENT->REQUEST->SET_METHOD('HEAD').

" Send the request
LO_HTTP_CLIENT->SEND(
*    EXPORTING
*      timeout                    = CO_TIMEOUT_DEFAULT    " Timeout of Answer Waiting Time
  EXCEPTIONS
    HTTP_COMMUNICATION_FAILURE = 1
    HTTP_INVALID_STATE         = 2
    HTTP_PROCESSING_FAILED     = 3
    HTTP_INVALID_TIMEOUT       = 4
    OTHERS                     = 5 ).
發送請求獲取Token
IF SY-SUBRC <> 0.
  RAISE HTTP_ERROR.
ENDIF.

" Receive the response
LO_HTTP_CLIENT->RECEIVE(
  EXCEPTIONS
    HTTP_COMMUNICATION_FAILURE = 1
    HTTP_INVALID_STATE         = 2
    HTTP_PROCESSING_FAILED     = 3
    OTHERS                     = 4 ).

IF SY-SUBRC NE 0.
  RAISE HTTP_ERROR.
ENDIF.

回收請求
DATA:EV_STATUS TYPE I.
DATA:IV_TOKEN TYPE STRING.
DATA:LT_COOKES TYPE TIHTTPCKI.
" Get status code
LO_HTTP_CLIENT->RESPONSE->GET_STATUS( IMPORTING CODE = EV_STATUS ).
檢查執行狀態
IF EV_STATUS = 200.
  "GET TIME STAMP FIELD ME->TOKEN_REFRESH_TIME.
  IV_TOKEN = LO_HTTP_CLIENT->RESPONSE->GET_HEADER_FIELD( 'x-csrf-token' ).
  LO_HTTP_CLIENT->RESPONSE->GET_COOKIES( CHANGING COOKIES = LT_COOKES ).
ENDIF.
取出Token 




DATA:LV_EQUNR TYPE EQUI-EQUNR,
  LV_VALDT            TYPE STRING.
LV_EQUNR = '''40043492'''.
LV_VALDT = '''9999-12-31T00%3A00'''.
IV_URL = | /sap/opu/odata/sap/API_EQUIPMENT/DismantleEquipment?Equipment=%2740043494%27&ValidityEndDate=datetime%279999-12-31T00%3A00%27 |.
拼接請求

在Odata中有些特殊的POST 是沒有PAYLOAD的 直接POST  很奇怪

CALL METHOD CL_HTTP_UTILITY=>SET_REQUEST_URI
  EXPORTING
    REQUEST = LO_HTTP_CLIENT->REQUEST
    URI     = IV_URL.



"setting request method
LO_HTTP_CLIENT->REQUEST->SET_METHOD('POST').



"adding headers

LO_HTTP_CLIENT->REQUEST->SET_HEADER_FIELD( NAME = 'x-csrf-token' VALUE = IV_TOKEN ).
LO_HTTP_CLIENT->REQUEST->SET_HEADER_FIELD( NAME = 'If-Match' VALUE = '*' ).

"BREAK-POINT .
content type 很重要 不然ODATA 沒辦法抓取請求參數值
LO_HTTP_CLIENT->REQUEST->SET_HEADER_FIELD( NAME = 'Content-Type' VALUE = 'application/json')."'application/xml;charset=utf-8').

CALL METHOD LO_HTTP_CLIENT->SEND
  EXCEPTIONS
    HTTP_COMMUNICATION_FAILURE = 1
    HTTP_INVALID_STATE         = 2
    HTTP_PROCESSING_FAILED     = 3
    HTTP_INVALID_TIMEOUT       = 4
    OTHERS                     = 5.

IF SY-SUBRC = 0.
  CALL METHOD LO_HTTP_CLIENT->RECEIVE
    EXCEPTIONS
      HTTP_COMMUNICATION_FAILURE = 1
      HTTP_INVALID_STATE         = 2
      HTTP_PROCESSING_FAILED     = 3
      OTHERS                     = 5.
ENDIF.

IF SY-SUBRC <> 0.
  "error handling
ENDIF.

RESPONSE = LO_HTTP_CLIENT->RESPONSE->GET_CDATA( ).

WRITE: 'response: ', RESPONSE.


BREAK-POINT.