Node.js getaddrinfo ENOTFOUND

Question

使用Node.js尝试获取以下网页的html内容时:

eternagame.wikia.com/wiki/EteRNA_Dictionary

我收到以下错误:

events.js:72
    throw er; // Unhandled 'error' event
          ^
Error: getaddrinfo ENOTFOUND
    at errnoException (dns.js:37:11)
    at Object.onanswer [as oncomplete] (dns.js:124:16)

我确实已经在stackoverflow上查找了这个错误,并意识到这是因为node.js无法从DNS中找到服务器(我认为).但是,我不确定为什么会这样,因为我的代码完美无缺www.google.com.

这是我的代码(几乎从一个非常相似的问题复制和粘贴,除了更改主机):

var http = require("http");

var options = {
    host: 'eternagame.wikia.com/wiki/EteRNA_Dictionary'
};

http.get(options, function (http_res) {
    // initialize the container for our data
    var data = "";

    // this event fires many times, each time collecting another piece of the response
    http_res.on("data", function (chunk) {
        // append this chunk to our growing `data` var
        data += chunk;
    });

    // this event fires *one* time, after all the `data` events/chunks have been gathered
    http_res.on("end", function () {
        // you can use res.send instead of console.log to output via express
        console.log(data);
    });
});

以下是我复制和粘贴的来源:如何在Expressjs中进行Web服务调用？

我没有使用node.js的任何模块.

谢谢阅读,

维尼特

Answer 1

在Node.js HTTP模块的文档中:http://nodejs.org/api/http.html#http_http_request_options_callback

您可以调用http.get('http://eternagame.wikia.com/wiki/EteRNA_Dictionary', callback),然后解析URL url.parse(); 或致电http.get(options, callback),这里options是

{
  host: 'eternagame.wikia.com',
  port: 8080,
  path: '/wiki/EteRNA_Dictionary'
}

更新

正如@EnchanterIO的评论中所述,该port字段也是一个单独的选项; 该协议http://不应包括在该host领域.https如果需要SSL,其他答案还建议使用模块.

Answer 2

另一个常见的错误来源

Error: getaddrinfo ENOTFOUND
    at errnoException (dns.js:37:11)
    at Object.onanswer [as oncomplete] (dns.js:124:16)

在设置属性时写入协议(https,https,...)hostoptions

  // DON'T WRITE THE `http://`
  var options = { 
    host: 'http://yoururl.com',
    path: '/path/to/resource'
  }; 

Answer 3

在HTTP请求的选项中,将其切换为

var options = { host: 'eternagame.wikia.com', 
                path: '/wiki/EteRNA_Dictionary' };

我认为这将解决你的问题.

Answer 4

  var http=require('http');
   http.get('http://eternagame.wikia.com/wiki/EteRNA_Dictionary', function(res){
        var str = '';
        console.log('Response is '+res.statusCode);

        res.on('data', function (chunk) {
               str += chunk;
         });

        res.on('end', function () {
             console.log(str);
        });

  });

Answer 5

如果您需要使用https,请使用https库

https = require('https');

// options
var options = {
    host: 'eternagame.wikia.com',
    path: '/wiki/EteRNA_Dictionary'
}

// get
https.get(options, callback);

Answer 6

我的问题是我的OS X(Mavericks)DNS服务需要重新启动.

Answer 7

我用这个修复了这个错误

$ npm info express --verbose
# Error message: npm info retry will retry, error on last attempt: Error: getaddrinfo ENOTFOUND registry.npmjs.org registry.npmjs.org:443
$ nslookup registry.npmjs.org
Server:     8.8.8.8
Address:    8.8.8.8#53

Non-authoritative answer:
registry.npmjs.org  canonical name = a.sni.fastly.net.
a.sni.fastly.net    canonical name = prod.a.sni.global.fastlylb.net.
Name:   prod.a.sni.global.fastlylb.net
Address: 151.101.32.162
$ sudo vim /etc/hosts 
# Add "151.101.32.162 registry.npmjs.org` to hosts file
$ npm info express --verbose
# Works now!

原始来源： https: //github.com/npm/npm/issues/6686

Answer 8

我认为http在端口80上发出了请求，即使我在options对象中提到了完整的主机URL。当我在以前在端口3000上运行的端口80上运行具有API的服务器应用程序时，它起作用了。请注意，要在端口80上运行应用程序，您将需要root特权。

Error with the request: getaddrinfo EAI_AGAIN localhost:3000:80

这是完整的代码段

var http=require('http');

var options = {
  protocol:'http:',  
  host: 'localhost',
  port:3000,
  path: '/iso/country/Japan',
  method:'GET'
};

var callback = function(response) {
  var str = '';

  //another chunk of data has been recieved, so append it to `str`
  response.on('data', function (chunk) {
    str += chunk;
  });

  //the whole response has been recieved, so we just print it out here
  response.on('end', function () {
    console.log(str);
  });
}

var request=http.request(options, callback);

request.on('error', function(err) {
        // handle errors with the request itself
        console.error('Error with the request:', err.message);        
});

request.end();

Answer 9

就我而言，问题是 URL 格式错误。我的网址中有双斜杠。