使用 ABAP 代码向百度网站发起请求并收到回应

使用事物码 SE38，新建一个 ABAP 程序，将下列代码粘贴进去，激活：

REPORT zhttp.

DATA: so_client TYPE REF TO if_http_client.

CALL METHOD cl_http_client=>create_by_url
  EXPORTING
    url                = 'http://www.baidu.com'
  IMPORTING
    client             = so_client
  EXCEPTIONS
    argument_not_found = 1
    plugin_not_active  = 2
    internal_error     = 3
    OTHERS             = 4.

ASSERT sy-subrc = 0.
so_client->request->set_method( 'GET' ).
CALL METHOD so_client->send
  EXCEPTIONS
    http_communication_failure = 1
    http_invalid_state         = 2
    http_processing_failed     = 3.
ASSERT sy-subrc = 0.

CALL METHOD so_client->receive
  EXCEPTIONS
    http_communication_failure = 1
    http_invalid_state         = 2
    http_processing_failed     = 3.

IF sy-subrc <> 0.
   so_client->get_last_error( IMPORTING code = data(lv_code) message = data(lv_message) ).
   WRITE:/ | error code: { lv_code }, text: { lv_message } |.
   return.
endif.

DATA(rv_data) = so_client->response->get_cdata( ).
so_client->close( ).

BREAK-POINT.

运行之后，如果一切成功，会自动弹出 ABAP 调试器：

如上图所示，双击第 42 行的变量 rv_data：

将 View 从 Fast Display 切换成 HTML Browser，即可看到通过 ABAP 代码请求回来的百度首页：

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