node.js报错The “chunk“ argument must be of type string or an instance of Buffer or Uint8Array.

如题，在使用node.js进行http请求时，出现如下报错：

The “chunk” argument must be of type string or an instance of Buffer or Uint8Array. Received an instance of Object

编辑

原代码如下：

const http = require("http");
const querystring = require("querystring");

const server = http.createServer((req, res) => {
  const method = req.method;
  const url = req.url;
  const path = req.url.split("?")[0];
  const query = req.url.split("?")[1];

  // 设置返回数据格式
  res.setHeader("Content-type", "application/json");

  const resData = {
    method,
    url,
    path,
    query,
  };

  if (method === "GET") {
    res.end(resData); // 这里数据类型为Object类型
  }
});

server.listen(8000);
console.log("OK");

而response.end()方法接收的参数类型只能是字符串或Buffer

修改办法：

const http = require("http");
const querystring = require("querystring");

const server = http.createServer((req, res) => {
  const method = req.method;
  const url = req.url;
  const path = req.url.split("?")[0];
  const query = req.url.split("?")[1];

  // 设置返回数据格式
  res.setHeader("Content-type", "application/json");

  const resData = {
    method,
    url,
    path,
    query,
  };

  if (method === "GET") {
    res.end(JSON.stringify(resData)); // 这里转换为字符串类型
  }
});

server.listen(8000);
console.log("OK");

问题就解决啦~

总结： response.end()方法接收的参数类型只能是字符串或Buffer