错误：getaddrinfo ENOTFOUND in nodejs for get call
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Error: getaddrinfo ENOTFOUND in nodejs for get call
提问by nnm
I am running a web server on node the code for which is given below
我在节点上运行网络服务器，其代码如下
var restify = require('restify');
var server = restify.createServer();
var quotes = [
{ author : 'Audrey Hepburn', text : "Nothing is impossible, the word itself says 'I'm possible'!"},
{ author : 'Walt Disney', text : "You may not realize it when it happens, but a kick in the teeth may be the best thing in the world for you"},
{ author : 'Unknown', text : "Even the greatest was once a beginner. Don't be afraid to take that first step."},
{ author : 'Neale Donald Walsch', text : "You are afraid to die, and you're afraid to live. What a way to exist."}
];
server.get('/', function(req, res) {
res.json(quotes);
});
server.get('/quote/random', function(req, res) {
var id = Math.floor(Math.random() * quotes.length);
var q = quotes[id];
res.json(q);
});
server.get('/quote/:id', function(req, res) {
if(quotes.length <= req.params.id || req.params.id < 0) {
res.statusCode = 404;
return res.send('Error 404: No quote found');
}
var q = quotes[req.params.id];
res.json(q);
});
server.listen(process.env.PORT || 3011);
And then i want to do a get request in the following code
然后我想在下面的代码中做一个获取请求
var https = require('http');
/**
* HOW TO Make an HTTP Call - GET
*/
// options for GET
var optionsget = {
host : 'http://localhost',
port : 3010,
path : '/quote/random', // the rest of the url with parameters if needed
method : 'GET' // do GET
};
console.info('Options prepared:');
console.info(optionsget);
console.info('Do the GET call');
// do the GET request
var reqGet = https.request(optionsget, function(res) {
console.log("statusCode: ", res.statusCode);
// uncomment it for header details
// console.log("headers: ", res.headers);
res.on('data', function(d) {
console.info('GET result:\n');
process.stdout.write(d);
console.info('\n\nCall completed');
});
});
reqGet.end();
reqGet.on('error', function(e) {
console.error(e);
});
I am just starting with node and i dont even know if this is the right way. I want to test the performance of express and restify.I have done a apache benchmark test for the server code i wrote and found contradicting results that restify is better.So i want to test out some more by making calls to remote services and then later read write to mongodb.The above code is my starting point.I am getting the error
我只是从节点开始，我什至不知道这是否是正确的方法。我想测试express和restify的性能。我对我写的服务器代码做了一个apache基准测试，发现restify更好的矛盾结果。所以我想通过调用远程服务来测试更多，然后再测试读写mongodb。上面的代码是我的起点。我收到错误
{ [Error: getaddrinfo ENOTFOUND] code: 'ENOTFOUND', errno: 'ENOTFOUND', syscall: 'getaddrinfo' }
Am i atleast heading in the write direction? What is the right way to the kind of tests that i want to? Why did i get the result restify faster than express? Can anyone guide me to the best starting point tutorials for application in node/express/backbone and mongodb?
我至少在写方向吗？我想要的那种测试的正确方法是什么？为什么我得到的结果比快递更快？谁能指导我在 node/express/backbone 和 mongodb 中应用的最佳起点教程？
回答by Karol
getaddrinfo ENOTFOUND means client was not able to connect to given address. Please try specifying host without http:
getaddrinfo ENOTFOUND 表示客户端无法连接到给定地址。请尝试在没有 http 的情况下指定主机：
var optionsget = {
host : 'localhost',
port : 3010,
path : '/quote/random', // the rest of the url with parameters if needed
method : 'GET' // do GET
};
Regarding learning resources, you won't go wrong if you start with http://www.nodebeginner.org/and then go through some good book to get more in-depth knowledge - I recommend Professional Node.js, but there's many out there.
关于学习资源，如果你从http://www.nodebeginner.org/开始，然后阅读一些好书来获得更深入的知识，你就不会出错- 我推荐Professional Node.js，但有很多那里。
回答by Ben Kim
for me it was because in /etc/hosts file the hostname is not added
对我来说这是因为在 /etc/hosts 文件中没有添加主机名
回答by neoerol
Check host file which like this
检查像这样的主机文件
##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
127.0.0.1 localhost
255.255.255.255 broadcasthost
回答by Jay Wick
I can't explain why, but changing url parameter from having localhostto 127.0.0.1on mongodb.MongoClient.connect()method on Windows 10 solved the issue.
我无法解释原因，但是在 Windows 10上将url 参数从必须更改localhost为127.0.0.1onmongodb.MongoClient.connect()方法解决了这个问题。
回答by Naren Chejara
I also had same problem and I fixed it by using right proxy. Please double check your proxy settings if you are using proxy network.
我也有同样的问题，我使用正确的代理修复了它。如果您使用代理网络，请仔细检查您的代理设置。
Hope this will help you -
希望能帮到你 -
回答by Adiii
i have same issue with Amazon server i change my code to this
我对亚马逊服务器有同样的问题，我将代码更改为此
var connection = mysql.createConnection({
localAddress : '35.160.300.66',
user : 'root',
password : 'root',
database : 'rootdb',
});
check mysql node module https://github.com/mysqljs/mysql
检查 mysql 节点模块 https://github.com/mysqljs/mysql
回答by Dr NVS
When I tried to install a new ionic app, I got the same error as follows, I tried many sources and found the mistake made in User Environment and System Environment unnecessarily included the PROXY value. I removed the ```user variables http://host:portPROXY
当我尝试安装一个新的 ionic 应用程序时，我得到了如下相同的错误，我尝试了很多来源，发现在用户环境和系统环境中犯的错误不必要地包含了 PROXY 值。我删除了```用户变量 http://host:portPROXY
system Variables http_proxy http://username:password@host:port```` and now it is working fine without trouble.
系统变量 http_proxy http://username:password@host:port```` 现在它可以正常工作了。
[ERROR] Network connectivity error occurred, are you offline?
If you are behind a firewall and need to configure proxy settings, see: https://ion.link/cli-proxy-docs
Error: getaddrinfo ENOTFOUND host host:80
回答by Washington Guedes
Struggling for hours, couldn't afford for more.
挣扎了几个小时，负担不起更多。
The solution that worked for me in less than 3 minutes was:
在不到 3 分钟的时间内对我来说有效的解决方案是：
npm install axios
Code ended up even shorter:
代码最终变得更短：
const url = `${this.env.someMicroservice.address}/v1/my-end-point`;
const { data } = await axios.get<MyInterface[]>(url, {
auth: {
username: this.env.auth.user,
password: this.env.auth.pass
}
});
return data;
回答by Er.Subhendu Kumar Pati
var http = require('http');
var options = {
host: 'localhost',
port: 80,
path: '/broadcast'
};
var requestLoop = setInterval(function(){
http.get (options, function (resp) {
resp.on('data', function (d) {
console.log ('data!', d.toString());
});
resp.on('end', function (d) {
console.log ('Finished !');
});
}).on('error', function (e) {
console.log ('error:', e);
});
}, 10000);
var dns = require('dns'), cache = {};
dns._lookup = dns.lookup;
dns.lookup = function(domain, family, done) {
if (!done) {
done = family;
family = null;
}
var key = domain+family;
if (key in cache) {
var ip = cache[key],
ipv = ip.indexOf('.') !== -1 ? 4 : 6;
return process.nextTick(function() {
done(null, ip, ipv);
});
}
dns._lookup(domain, family, function(err, ip, ipv) {
if (err) return done(err);
cache[key] = ip;
done(null, ip, ipv);
});
};
// Works fine (100%)
回答by Hady
I was running into the same problem and after some trial and error discovered that my hostsfile customisation was causing the problem.
我遇到了同样的问题，经过反复试验后发现是我的hosts文件自定义导致了问题。
My localhostDNS was overwritten and because of that a simple ping was failing:
我的localhostDNS 被覆盖，因此一个简单的 ping 失败：
$ ping http://localhost
# ping: cannot resolve http://localhost: Unknown host
Once I resolved the configuration of /private/etc/hostsfile, pinging localhostsuccessfully worked, and was no longer getting the error that you were seeing:
一旦我解决了/private/etc/hosts文件的配置，ping 就localhost成功了，并且不再出现您看到的错误：
# Fatal error: getaddrinfo ENOTFOUND
