javascript - node.js 错误 : connect ECONNREFUSED; response from server

Question

这个小程序有问题:

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();
    });
});

控制台中的结果是这样的:

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)

我不明白为什么会这样。

Answer 1

从您的代码看来，您的文件包含向 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机器上创建服务器来监听端口 8000。

为此，您必须在 localhost 上设置可以满足您的请求的服务器。

1. 创建 server.js

   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!');
    });
   

2. 运行 server.js : node server.js

3. 运行包含发出请求的代码的文件。