ABAP - SAP与企业微信集成

最近接到一个SAP直接给企业微信推送消息的需求，说实话之前一直没接触过，脑袋空空的，最终通过在百度搜索案例成功解决了，百度虽然一直被诟病，但却无法否认它的神奇。
实现效果

实现思路：从需求出发，SAP给企业微信推送消息，其本质上是SAP调用企业微信对外发布的API，按照这个思路去找企业微信的API就好了。
1.获取企业内部开发>服务端API>开发指南>获取access_tokenhttps://developer.work.weixin.qq.com/document/path/910392.企业内部开发>服务端API>消息推送>发送应用消息https://developer.work.weixin.qq.com/document/path/90236
开发技巧

获取access_token请求地址： https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=企业ID&corpsecret=SECRET；两个参数企业ID和SECRET可以去找企业微信管理员的同事获取，拿到两个参数可以在postman测试；
根据第一步获取的ACCESS_TOKEN，再次调用企业微信API发送应用消息；请求地址： https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token=ACCESS_TOKEN

ABAP 代码

DATA lv_get_url   TYPE string.
DATA lv_post_url  TYPE string.

TYPES:BEGIN OF ty_get_receive,
        errcode      TYPE i,
        errmsg       TYPE string,
        access_token TYPE string,
        expires_in   TYPE i.
TYPES:END OF ty_get_receive.

DATA ls_get_receive TYPE ty_get_receive.

TYPES:BEGIN OF ty_content,
        content TYPE string.
TYPES:END OF ty_content.

TYPES:BEGIN OF ty_post_request,
        touser                   TYPE string,
        msgtype                  TYPE string,
        agentid                  TYPE i,
        text                     TYPE ty_content,
        safe                     TYPE i,
        enable_id_trans          TYPE i,
        enable_duplicate_check   TYPE i,
        duplicate_check_interval TYPE i.
TYPES:END OF ty_post_request.

DATA ls_post_request TYPE ty_post_request.

TYPES:BEGIN OF ty_post_receive,
        errcode TYPE i,
        errmsg  TYPE string,
        msgid   TYPE string.
TYPES:END OF ty_post_receive.

DATA ls_post_receive TYPE ty_post_receive.

START-OF-SELECTION.

  lv_get_url = `https://qyapi.weixin.qq.com/cgi-bin/gettoken?` &&
               `corpid=企业ID` &&
               `&corpsecret=企业应用Secret`.

  ls_post_request-text-content = |外购产品同步销售订单通知:\n|
                              && |{ sy-datum DATE = ISO } { sy-uzeit TIME = ISO }\n|
                              && |1234567890|
                              && |采购订单没有同步销售订单，请知悉! |.

  "设置传输内容
  ls_post_request-touser = `8073|404|613|646`.
  ls_post_request-msgtype = `text`.
  ls_post_request-agentid = 1000061.
  ls_post_request-safe = 0.
  ls_post_request-enable_id_trans = 0.
  ls_post_request-enable_duplicate_check = 0.
  ls_post_request-duplicate_check_interval = 0.

*** 第一步：获取access_token请求
  cl_http_client=>create_by_url( EXPORTING url    = lv_get_url
                                 IMPORTING client = DATA(io_http_client) ).

  io_http_client->request->set_content_type( content_type = 'application/json; charset=utf-8' ).

  io_http_client->request->set_method( if_http_request=>co_request_method_get ).

  io_http_client->send( EXCEPTIONS http_communication_failure = 1
                                   http_invalid_state         = 2  ).
  IF sy-subrc NE 0.
    io_http_client->get_last_error( IMPORTING message = DATA(lv_message) code = DATA(lv_code) ).
    CONCATENATE '获取access_token失败原因:' lv_message INTO lv_message.
  ENDIF.

  io_http_client->receive( EXCEPTIONS http_communication_failure = 1
                                      http_invalid_state         = 2
                                      http_processing_failed     = 3 ).
  IF sy-subrc EQ 0.
    DATA(lv_get_res) = io_http_client->response->get_cdata( ).
  ELSE.
    io_http_client->get_last_error( IMPORTING message = DATA(lv_msg) code = DATA(lv_code1) ).
    CONCATENATE '企业微信服务器响应失败原因:' lv_msg INTO lv_msg.
  ENDIF.

  "将Json报文转换成SAP结构
  /ui2/cl_json=>deserialize( EXPORTING json = lv_get_res
                                       pretty_name = /ui2/cl_json=>pretty_mode-camel_case
                              CHANGING data = ls_get_receive ).

  IF ls_get_receive-errmsg NE `ok`.
    MESSAGE '获取access_token失败' TYPE 'E'.
  ENDIF.

*** 第二步：发送到企业微信
  CLEAR:io_http_client.

  lv_post_url = `https://qyapi.weixin.qq.com/cgi-bin/message/send?access_token=` &&
                ls_get_receive-access_token.

  cl_http_client=>create_by_url( EXPORTING url    = lv_post_url
                                 IMPORTING client = io_http_client ).

  io_http_client->request->set_content_type( content_type = 'application/json; charset=utf-8' ).

  io_http_client->request->set_method( if_http_request=>co_request_method_post ).

  DATA(lv_send_data) = /ui2/cl_json=>serialize( data        = ls_post_request
                                                compress    = abap_false
                                                pretty_name = /ui2/cl_json=>pretty_mode-camel_case ).

  io_http_client->request->set_cdata( data = lv_send_data ).

  io_http_client->send( EXCEPTIONS http_communication_failure = 1
                                   http_invalid_state         = 2  ).
  IF sy-subrc NE 0.
    io_http_client->get_last_error( IMPORTING message = lv_message code = lv_code ).
    CONCATENATE '发送POST请求给企业微信失败:' lv_message INTO lv_message.
  ENDIF.

  io_http_client->receive( EXCEPTIONS http_communication_failure = 1
                                      http_invalid_state         = 2
                                      http_processing_failed     = 3 ).
  IF sy-subrc EQ 0.
    DATA(lv_post_res) = io_http_client->response->get_cdata( ).
  ELSE.
    io_http_client->get_last_error( IMPORTING message = lv_msg code = lv_code1 ).
    CONCATENATE '企业微信服务器响应失败原因:' lv_msg INTO lv_msg.
  ENDIF.

  "将Json报文转换成SAP结构
  /ui2/cl_json=>deserialize( EXPORTING json = lv_post_res
                                       pretty_name = /ui2/cl_json=>pretty_mode-camel_case
                              CHANGING data = ls_post_receive ).
  IF ls_post_receive-errmsg NE `ok`.
    MESSAGE '发送POST请求给企业微信失败' TYPE 'S' DISPLAY LIKE 'E'.
  ELSE.
    MESSAGE '发送POST请求给企业微信成功' TYPE 'S'.
  ENDIF.

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