在 HTTP 请求中指定端口号 (node.js)

声明:本页面是StackOverFlow热门问题的中英对照翻译,遵循CC BY-SA 4.0协议,如果您需要使用它,必须同样遵循CC BY-SA许可,注明原文地址和作者信息,同时你必须将它归于原作者(不是我):StackOverFlow 原文地址: http://stackoverflow.com/questions/31662411/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me): StackOverFlow

提示:将鼠标放在中文语句上可以显示对应的英文。显示中英文
时间:2020-09-02 19:09:21  来源:igfitidea点击:

Specify port number in HTTP request (node.js)

node.jshttprequest

提问by djfdev

Is it possible to specify a port number when making at HTTP request using the request module? I'm not seeing anything about this in the documentation:

是否可以在使用请求模块进行 HTTP 请求时指定端口号?我在文档中没有看到任何关于此的内容:

var request = require('request');

// this works
request({
  method: 'GET',
  url: 'http://example.com'
}, function(error, response, body) {
  if (error) console.log(error);
  console.log(body);
});

// this does not work
request({
  method: 'GET',
  url: 'http://example.com:10080'
}, function(error, response, body) {
  // ...
});

Additionally, when I run the second version, absolutely nothing happens in my program (almost like the request was never made).

此外,当我运行第二个版本时,我的程序中绝对没有任何反应(几乎就像从未发出请求一样)。

I also know that I can specify a port number when making a request using the core httpmodule. Why is the not an option in the request module?

我也知道我可以在使用核心http模块发出请求时指定端口号。为什么不是请求模块中的选项?

EDIT: I should have mentioned this before, but I am running this application on Heroku.

编辑:我之前应该提到过这一点,但我正在 Heroku 上运行这个应用程序。

When I run the request locally (using the request module) I am able to specify the port number, and get a successful callback.

当我在本地运行请求时(使用请求模块),我能够指定端口号,并获得成功的回调。

When I run the request from Heroku, no callback is fired, and nginx shows no record of the request.

当我从 Heroku 运行请求时,没有触发回调,并且 nginx 没有显示请求的记录。

Am I crazy? Is there some reason Heroku is preventing me from making an outbound HTTP request to a specific port number?

我疯了吗?Heroku 是否有某种原因阻止我向特定端口号发出出站 HTTP 请求?

回答by Robin Murphy

Using requestwith the complete URL as the first argument works for me:

使用request完整的 URL 作为第一个参数对我有用:

var http = require('http');
var request = require('request');

// start a test server on some non-standard port
var server = http.createServer(function (req, res) {
  res.end('Hello world');
});
server.listen(1234);

// make the GET request
request('http://127.0.0.1:1234', function (err, res) {
  if (err) return console.error(err.message);

  console.log(res.body);
  // Hello world

  server.close();
});

Specifying the methodand the urlseparately also works:

分别指定methodurl也有效:

request({
  method: 'GET',
  url: 'http://127.0.0.1:1234'
}, function (err, res) {
  if (err) return console.error(err.message);

  console.log(res.body);
  // Hello world

  server.close();
});

You might want to check that your server is running and that you're not behind a proxy or firewall that prevents access on that port.

您可能想要检查您的服务器是否正在运行,并且您没有在阻止访问该端口的代理或防火墙后面。

回答by Mauro Moreno

I realize the question asks for the request module but in a more general context, if using the http module, you can use the portkey docs.

我意识到问题要求请求模块,但在更一般的上下文中,如果使用 http 模块,则可以使用port关键docs

e.g.

例如

http.get({
    host: 'example.com', 
    path: '/some/path/',
    port: 8080
}, function(resp){
    resp.on('data', function(d){
        console.log('data: ' + d)
    })
    resp.on('end', function(){
        console.log('** done **')
    })
}).on('error', function(err){
    console.log('error ' + err)
})