将 json 邮寄到服务器节点

Question

这是我使用 axios 发送准备好的 json 的代码。

const axios = require("axios");

const jsonObj = {
    serial: '090982037439', //string
    sensor_type: 'ciccio bello', //string

    value_registered: {
        value: 30, //valore
        unit_of_measure: 'celsius' ///string
    },

    value_registered_at: '29-04-2021' ///string 

};

const json = JSON.stringify(jsonObj);

axios({
    method: 'post',
    url: 'http://localhost:3000/api/post',
    data: json
});

但我总是得到以下错误（415）。

UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise 
rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 2)
(node:11188) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Answer 1

415 不支持的媒体类型

1. 看起来axios 不需要对数据进行字符串化（或者这是可选的）？
2. 尝试设置 MIME 类型
3. 415响应码表示axios至少发送数据。 所以在后端检查问题
4. 当响应码不是 20X 时catch错误

const options = {
  headers: {'content-type': 'application/json'}
};

axios.post(
  '/login',
  {
    firstName: 'Finn',
    lastName: 'Williams'
  },
  options
).catch((error) => {
  console.log(error)
});

Answer 2

415 表示不支持的媒体类型。https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/415

确保 API 端点支持 json 请求。 祝你好运！