Question

我正在尝试使用 NODE.JS 测试服务器可用性，例如服务器监控。我在其中创建了包含 5000域的测试CSV文件，并使用了以下代码：

var net = require('net');

function Daemon(address,name, port) {
  this.address = address;
  this.name = name;
  this.port = port;
}

var fs = require('fs');
var array = fs.readFileSync('domains.csv').toString().split("\n");
for(i in array) {
    console.log(array[i]);
    daemons.push(new Daemon(array[i],'http', 80));
}

// loop through each daemon in the array
daemons.forEach(function(d) {

  // create the TCP stream to the server
  var stream = net.createConnection(d.port, d.address);
    console.log('[' + d.address + ']\t connected');

  // listen for connection
  stream.on('connect', function(){

    // connection success
    //console.log('[' + d.name + ']\t connected');

    stream.end(); // close the stream
  });

  // listen for any errors
  stream.on('error', function(error){
    console.log('[' + d.name + ']\t error: ' + error);

    stream.destroy(); // close the stream

  });
});

特定域名有很多超时：

[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: connect ETIMEDOUT
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: connect ETIMEDOUT
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: connect ETIMEDOUT
[http]   error: Error: getaddrinfo ENOTFOUND
[http]   error: Error: connect ETIMEDOUT
[http]   error: Error: connect ETIMEDOUT
[http]   error: Error: connect ETIMEDOUT
[http]   error: Error: connect ETIMEDOUT
[http]   error: Error: read ETIMEDOUT
[http]   error: Error: connect ETIMEDOUT
[http]   error: Error: read ETIMEDOUT
[http]   error: Error: connect ETIMEDOUT
[http]   error: Error: read ETIMEDOUT
[http]   error: Error: connect ETIMEDOUT

但这段代码很慢。完成它需要将近30分钟。如何加速此代码（异步连接）？

我需要脚本能够每5分钟测试 100.000个域名

Answer 1

我的猜测是，在某一点上，打开5000个出站TCP连接对您的系统不利。您应该将并发连接尝试限制为合理的数量。

我建议你使用async.queue并发为100或200。

NODE.JS连接测试速度慢

1 个答案: