作为 object 的一部分发送时无法读取 response.json()

cannot read response.json() when sent as part of an object

我正在从函数进行 API 调用,return response.json(),在调用函数上我可以获得数据。但是除了 response.json() 我还需要将 header 数据传递给调用函数所以我创建了一个 object 并添加了 response.json() 和 header 数据

在调用函数中我可以读取 header 数据但不能读取 response.json()。你能建议如何正确读取响应数据吗?

API调用函数

export function loginlibAPI ( id, password ){
    var loginURL = 'https://example.com/sessions';
    return fetch(loginURL, {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json'
        },
        body: JSON.stringify({
            "user": {
                'email': id,
                'password': password
            }            
        }),
    })
    .then((response) =>{
          consoleLog('loginUser_lib - header ' + response.headers.get('Authorization-X'));  

    if (response.headers.get('content-type').match(/application\/json/)) {
        consoleLog('inside content type');        
        //return response.json(); // works 
        return { response: response.json(), authorizationToken: response.headers.get('Authorization-X') }; //can not read the response in the calling function
    }
    return response;
    })
    .catch((error) => {
        consoleLog('Error from loginlibAPI() api call - ' + error.message);
    });
}

调用函数

loginUser_lib = async (  ) => {
    const returned = await loginlibAPI( this.state.nationalId, this.state.password ).then((res) => {
      //consoleLog('loginUser_lib - '  + JSON.stringify(res)); // can read data when only response.json() is sent
      consoleLog('loginUser_lib - ' + res.authorizationToken); //works fine - received 'abcdfdlkjsdlkjsdlkj'
      consoleLog('loginUser_lib - ' + res.response);  //returns - [object Object]
      consoleLog('loginUser_lib - ' + JSON.stringify(res.response)); //returns - {"_40":0,"_65":0,"_55":null,"_72":null}
    })
  }

请记住 response.json() returns 一个 承诺 ,因此您需要在从中获取数据之前解决它。类似于:

return response
    .json()
    .then(data => ({
        response: data,
        authorizationToken: response.headers.get('Authorization-X')
    });