问使用Fetch in ReactJS (带有标头和请求体)进行POST调用

EN

 - Request Headers :
servicename:login  
frontofficeid:Checker 
id:Mobile
language:1 
Content-Type:application/json 
loginid:SYSADMIN1

Request Body: 
{  "data" : 
  {  "attributes": 
     {    "loginId": "SYSADMIN1", 
          "password": "abcd1234", 
           "pmuv": "RTY" 
}  
}
}

 componentDidMount(){
    var myHeaders = new Headers();
    myHeaders.append('Accept' ,  'application/json');
    myHeaders.append('Content-Type' ,  'application/json');
    myHeaders.append('servicename' ,  'login');
    myHeaders.append('frontofficeid' ,  'Checker');
    myHeaders.append('id' ,  'Mobile');
    myHeaders.append('language' ,  1);
    myHeaders.append('loginid' ,  'SYSADMIN1');

    const myInit = {
      method : "POST",
      data : {
        attributes: {
          loginId: "SYSADMIN1",
          password: "abcd1234",
          pmuv: "RTY"
        }
      },
      headers: myHeaders
    };
    var url="http://<HOST_IP>:<HOST_PORT>/midsizeable/HJK/CheckerRun"

    var myRequest = new Request(url)
    fetch(myRequest, myInit)
      .then((response) => {
        console.log(response)
        return response.json();
      })
      .then((jsonObject) => {
      console.log("BODY ")
      console.log("This is Obj" , jsonObject)
        this.setState({
          message : jsonObject.id,
        })
      })
      .catch((error) => {
        console.log(error);
      });


  }