SAP 调取http的x-www-form-urlencoded形式的接口

一、了解下x-www-form-urlencoded形式对于SAP来说有啥区别
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简单来说，
1.raw格式就是标准的json格式：{“Name”:“John Smith”，“Age”: 23}
2.x-www格式是要转化一下的：Name=John+Smith&Age=23
字段与字段相互连接要用 & 符号，空格用 + 连接。所以说当你的关键参数里面带有这些特殊符号时，就要用方法转化一下。

二、具体实例。
先使用Postman跑一下，ok没有问题，可以通畅。关键信息按照你的接口来，我的接口信息上马了。
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然后写ABAP代码：

DATA: len         TYPE        i, "发送报文长度
      len_string  TYPE        string,
      url         TYPE        string, "接口地址
      http_client TYPE REF TO if_http_client, "http客户端
      post_string TYPE        string,
      result      TYPE        string.
DATA: it_header  TYPE tihttpnvp,
      gv_json_in TYPE string VALUE '' .

START-OF-SELECTION.
  " url = 'https://api.map.baidu.com/weather/v1/?district_id=222405&data_type=all&ak=cvqVbWx3ruVm63LqMbuW43K3oqNOodBT'.

  url = 'http://这是个具体的网址，你需要粘贴上你的网址token'.

  cl_http_client=>create_by_url(
      EXPORTING url = url    "服务提供方服务地址
      IMPORTING client  =  DATA(lo_client)
    ).

  "调取方式：get 或者为 post
  lo_client->request->set_method( if_http_request=>co_request_method_post ).
  " lo_client->request->set_method( if_http_request=>co_request_method_get ).

  "设置抬头字段
  CALL METHOD lo_client->request->set_header_field
    EXPORTING
      name  = 'Content-Type'
      value = 'application/x-www-form-urlencoded'.  "为这种形式的，需要设置抬头格式
      
"返回格式。为json的
  lo_client->response->if_http_entity~set_content_type( content_type = 'application/json' ).

*lo_client->response->get_header_field( name = 'x-csrf-token' ).
*lo_client->response->get_cookies( CHANGING cookies = lt_cookies ).

  DATA:lv_username TYPE string.
  DATA:lv_password TYPE string.

"为这种x-www-form-urlencoded形式的，需要把变量全部转译一下，比如&符号的
  lv_username = cl_http_utility=>escape_url( 'cha填写关键信息' ).
  lv_password = cl_http_utility=>escape_url( 'O0&J人工打码' ).
  gv_json_in =   'grant_type=password' &&   "固定值
                 '&username=' && lv_username &&
                 '&password=' && lv_password &&
                 '&client_id=crm' .  "固定值

  DATA(lv_len) = strlen( gv_json_in ).
**  设置post接口body参数
  lo_client->request->set_cdata( data = gv_json_in  length = lv_len ).


**  发送数据
  lo_client->send(
  "    EXPORTING
 "       timeout                    = co_timeout_default " Timeout of Answer Waiting Time
    EXCEPTIONS
      http_communication_failure = 1                  " Communication Error
      http_invalid_state         = 2                  " Invalid state
      http_processing_failed     = 3                  " Error When Processing Method
      http_invalid_timeout       = 4                  " Invalid Time Entry
      OTHERS                     = 5
  ).
  IF sy-subrc <> 0.
    result = '接口接受响应失败'.
  ENDIF.

**********************************************************************
**  接收返回参数
  lo_client->receive(
    EXCEPTIONS
      http_communication_failure = 1                " Communication Error
      http_invalid_state         = 2                " Invalid state
      http_processing_failed     = 3                " Error When Processing Method
      OTHERS                     = 4
  ).
  IF sy-subrc <> 0.
    result = '接口接受响应失败'.
  ENDIF.

  result = lo_client->response->get_cdata( ).

  lo_client->close( ).
  "  WRITE: url.
  WRITE: / result.