8.2数据签名

联盟成员注册后才能使用，注册成功后，每个联盟成员有一个身份ID和一个KEY，调用接口时必须传入身份ID(参数名为：union_id)和用数据签名。
sign生成方法：对请求中的data数据加上**key=分配给成员的KEY**，进行MD5并转为大写。

示例：
**原始请求为：**
{"data":{"name":"张三","time":"2022-02-24 16:20:41","pass_type":"in","user_type":"2","id_number":"1234567890","telephone":"18799098765","face_img":"test","code":"test","user_code":"1","gate_name":"test","aisle_name":"test1"}}

**签名方法：**
data后面加上：key=7B315B512350500E  得到（7B315B512350500E为分配给联盟成员的KEY）：
{"name":"张三","time":"2022-02-24 16:20:41","pass_type":"in","user_type":"2","id_number":"1234567890","telephone":"18799098765","face_img":"test","code":"test","user_code":"1","gate_name":"test","aisle_name":"test1"}key=7B315B512350500E

对上面的字符串MD5并大写得到：0427A04F49FE3E25804C12999F45A96C，在MD5方法中，取字节时使用**utf-8码**

**请求数据为：**
{"platform\_name": "shanghai","union\_id": "200538","sign": "0427A04F49FE3E25804C12999F45A96C","timestamp": "1645690842","data": { "name": "张三","time": "2022-02-24 16:20:41","pass\_type": "in","user\_type": "2", "id\_number": "1234567890","telephone": "18799098765","face\_img": "test","code": "test","user\_code": "1","gate\_name": "test","aisle\_name": "test1"    } }
返回结果：
{"code":1,"data":"{\\"state\\":1,\\"message\\":\\"上报成功\\"}","message":"成功"}