js错误：连接econndeleced；来自服务器的响应

Question

var http = require("http");
var request = http.request({
    hostname: "localhost",
    port: 8000,
    path: "/",
    method: "GET"
}, function(response) {
    var statusCode = response.statusCode;
    var headers = response.headers;
    var statusLine = "HTTP/" + response.httpVersion + " " +statusCode + " " + http.STATUS_CODES[statusCode];
    console.log(statusLine);
    for (header in headers) {
        console.log(header + ": " + headers[header]);
    }
    console.log();
    response.setEncoding("utf8");
    response.on("data", function(data) {
        process.stdout.write(data);
    });
    response.on("end", function() {
        console.log();
    });
});

控制台中的结果如下：

events.js:141
      throw er; // Unhandled 'error' event
      ^

Error: connect ECONNREFUSED 127.0.0.1:8000
    at Object.exports._errnoException (util.js:870:11)
    at exports._exceptionWithHostPort (util.js:893:20)
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1063:14)

我不明白为什么会发生这种情况。

Answer 1

从您的代码来看，文件中似乎包含向localhost(127.0.0.1:8000)发出get请求的代码。

问题可能是您没有在本地计算机上创建侦听端口8000的服务器。

为此，您必须在localhost上设置服务器，以满足您的请求。

var express = require('express');
var app = express();

app.get('/', function (req, res) {
  res.send('Hello World!'); // This will serve your request to '/'.
});

app.listen(8000, function () {
  console.log('Example app listening on port 8000!');
 });