blocks|key|2742966|text|您可以使用exec调用系统ping命令|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2742967|var+sys+=+require('sys')
var+exec+=+require('child_process').exec;
function+puts(error,+stdout,+stderr)+{+sys.puts(stdout)+}
exec("ping+-c+3+localhost",+puts);|code-block|syntax|javascript|2742968|entityMap^0|5|4|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

You could use <code>exec</code> to call the system ping command

<pre><code>var sys = require('sys')
var exec = require('child_process').exec;
function puts(error, stdout, stderr) { sys.puts(stdout) }
exec("ping -c 3 localhost", puts);
</code></pre>

blocks|key|2743170|text|node-net-ping是一个使用原始套接字的很棒的模块。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2743171|而且，如果您只寻找原始套接字，同一个开发人员也有一个用于此的模块：node-raw-socket。|2743172|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/stephenwvickers/node-net-ping|1|https://github.com/stephenwvickers/node-raw-socket^0|0|D|0|0|X|F|1|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|F|3|-4|5|6|7|X|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]|N|$5|I|J|K|C|$L|O]]]]

<a href="https://github.com/stephenwvickers/node-net-ping" rel="noreferrer">node-net-ping</a> is an awesome module that uses raw sockets.

And, if you are looking for only raw sockets, the same developer has a module for that too: <a href="https://github.com/stephenwvickers/node-raw-socket" rel="noreferrer">node-raw-socket</a>.

blocks|key|2743065|text|我是ping-wrapper的作者。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2743066|它产生ping，您可以立即监听事件。如果进程退出，它将自动生成。|2743067|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/langpavel/node-ping-wrapper^0|2|C|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

I'm author of <a href="https://github.com/langpavel/node-ping-wrapper">ping-wrapper</a>.

It spawn ping and you can listen to events immediately. If process quits, it will be spawn automatically.

blocks|key|676572|text|执行ping(可编程)需要root权限，因为它需要需要root访问权限的raws套接字。您可以在Gradwohl's代码片段之后执行ping，但请记住，您正在派生一个(相对)昂贵的新进程。如果你不需要做很多事情(并发性)，这肯定能行得通:)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|676573|要在没有分支过程的情况下(仅在node.js中)这样做，我认为您有两个选择，这两个选择都很难实现:()|676574|676575|将此ping+python+library重写为node.js，然后以根用户身份运行程序。|ordered-list-item|676576|使用asio+c%2B%2B+library为node.js编写一个c%2B%2B+extension/addon+for+node.js。它还提供了几个如何执行icmp+ping.|676577|的示例|676578|不(仅)使用node.js：|676579|676580|使用以根用户身份运行的python+ping+library，通过redis与node.js实例通信。=>+最容易实现。(几乎没有任何工作，但我认为还是使用asio+c%2B%2B编写相当快的:))|style|BOLD|676581|write+c(%2B%2B)代码，而不是编写node.js扩展，通过hiredis与同样使用redis的node.js进行通信。|676582|676583|作为附注，如何在node.js上使用redis：|676584|从http://redis.io|676585|install+fast+node_redis+library|unordered-list-item|676586|
安装redis+|676587|676588|676589|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/4737130/how-to-ping-from-a-node-js-app/4737427#4737427|1|http://www.g-loaded.eu/2009/10/30/python-ping/|2|http://think-async.com/|3|http://nodejs.org/docs/v0.2.6/api.html#addons-313|4|http://think-async.com/Asio/asio-1.4.7/doc/asio/examples.html#asio.examples.icmp|5|6|https://github.com/antirez/hiredis|7|http://redis.io/|8|https://github.com/mranney/node_redis^0|1C|A|0|0|0|0|2|J|1|0|2|G|2|U|V|3|21|9|4|0|0|0|0|1I|15|B|J|5|0|V|7|6|0|0|0|1|F|7|0|D|I|8|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1V|8|@]|9|@$A|1W|B|1X|1|1Y]]|C|$]]|$1|D|3|E|5|6|7|1Z|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|20|8|@]|9|@]|C|$]]|$1|G|3|H|5|I|7|21|8|@]|9|@$A|22|B|23|1|24]]|C|$]]|$1|J|3|K|5|I|7|25|8|@]|9|@$A|26|B|27|1|28]|$A|29|B|2A|1|2B]|$A|2C|B|2D|1|2E]]|C|$]]|$1|L|3|M|5|6|7|2F|8|@]|9|@]|C|$]]|$1|N|3|O|5|6|7|2G|8|@]|9|@]|C|$]]|$1|P|3|-4|5|6|7|2H|8|@]|9|@]|C|$]]|$1|Q|3|R|5|I|7|2I|8|@$A|2J|B|2K|S|T]]|9|@$A|2L|B|2M|1|2N]]|C|$]]|$1|U|3|V|5|I|7|2O|8|@]|9|@$A|2P|B|2Q|1|2R]]|C|$]]|$1|W|3|-4|5|6|7|2S|8|@]|9|@]|C|$]]|$1|X|3|Y|5|6|7|2T|8|@]|9|@]|C|$]]|$1|Z|3|10|5|6|7|2U|8|@]|9|@$A|2V|B|2W|1|2X]]|C|$]]|$1|11|3|12|5|13|7|2Y|8|@]|9|@$A|2Z|B|30|1|31]]|C|$]]|$1|14|3|15|5|6|7|32|8|@]|9|@]|C|$]]|$1|16|3|-4|5|13|7|33|8|@]|9|@]|C|$]]|$1|17|3|-4|5|6|7|34|8|@]|9|@]|C|$]]|$1|18|3|-4|5|6|7|35|8|@]|9|@]|C|$]]]|19|$1A|$5|1B|1C|1D|C|$1E|1F]]|1G|$5|1B|1C|1D|C|$1E|1H]]|1I|$5|1B|1C|1D|C|$1E|1J]]|1K|$5|1B|1C|1D|C|$1E|1L]]|1M|$5|1B|1C|1D|C|$1E|1N]]|1O|$5|1B|1C|1D|C|$1E|1H]]|1P|$5|1B|1C|1D|C|$1E|1Q]]|1R|$5|1B|1C|1D|C|$1E|1S]]|1T|$5|1B|1C|1D|C|$1E|1U]]]]

Doing ping(programmable) requires root privileges because it requires raws sockets which require root access. You could perform ping following <a href="https://stackoverflow.com/questions/4737130/how-to-ping-from-a-node-js-app/4737427#4737427">Gradwohl's</a> snippet, but keep in mind that you are forking a new process which is expensive(relatively). If you don't need to do it a lot(concurrency) this will definitely work :)

To do it in node.js(only) without forking process I think you have a couple of options, which are both hard to implement :()

<ol>
<li>rewrite this <a href="http://www.g-loaded.eu/2009/10/30/python-ping/" rel="nofollow noreferrer">ping python library</a> to node.js and then run program as root user.</li>
<li>write a <a href="http://nodejs.org/docs/v0.2.6/api.html#addons-313" rel="nofollow noreferrer">c++ extension/addon for node.js</a> using <a href="http://think-async.com/" rel="nofollow noreferrer">asio c++ library</a> for node.js. It also has a couple of examples how to do <a href="http://think-async.com/Asio/asio-1.4.7/doc/asio/examples.html#asio.examples.icmp" rel="nofollow noreferrer">icmp ping</a>.</li>
</ol>

Not (only) using node.js:

<ol>
<li>use <a href="http://www.g-loaded.eu/2009/10/30/python-ping/" rel="nofollow noreferrer">python ping library</a> ran as root and communicate with node.js instance via redis. => EASIEST to implement.(hardly any work but I think rather fast :))</li>
<li>write c(++) code again using asio c++ but instead of writing node.js extension communicate via <a href="https://github.com/antirez/hiredis" rel="nofollow noreferrer">hiredis</a> with node.js which also uses redis.</li>
</ol>

As a side-note how to use redis on node.js:

<ul>
<li>install redis from <a href="http://redis.io" rel="nofollow noreferrer">http://redis.io</a></li>
<li>install the fast <a href="https://github.com/mranney/node_redis" rel="nofollow noreferrer">node_redis library</a></li>
</ul>

blocks|key|4345594|text|我知道这个答案很久以前就得到了回答，但对于正在寻找相同答案的人，我已经在github上写了一个模块来尝试简化它:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4345595|https://github.com/bscarvell/pingwrap|offset|length|4345596|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|11|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

I know this answer has been answered quite a while ago, but for people who are looking for the same answer, I have written a module on github to try simplify it more :)

<a href="https://github.com/bscarvell/pingwrap" rel="nofollow">https://github.com/bscarvell/pingwrap</a>

blocks|key|2743114|text|您也可以使用我的nodejs+ping包装器yaping。总有一天，我们将在nodejs中获得原始套接字，我们将能够制作自己的ping数据包，并对我们的响应时间撒谎。;-)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|2743115|这个简单的函数应该|2743116|ping+|2743117|do+dns+lookups|unordered-list-item|2743118|
|2743119|+once|2743120|2743121|timeout+after+10+well+out+error+codes+ping+provides|2743122|2743123|spawn+a|2743124|2743125|+processes+of+|2743126|2743127|2743128|
(执行dns查找并在10秒后超时一次子进程已超时)|2743129|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/reconbot/node-yaping^0|M|6|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|19|8|@]|9|@$A|1A|B|1B|1|1C]]|C|$]]|$1|D|3|E|5|6|7|1D|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|1E|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|1F|8|@]|9|@]|C|$]]|$1|K|3|L|5|6|7|1G|8|@]|9|@]|C|$]]|$1|M|3|N|5|J|7|1H|8|@]|9|@]|C|$]]|$1|O|3|L|5|6|7|1I|8|@]|9|@]|C|$]]|$1|P|3|Q|5|J|7|1J|8|@]|9|@]|C|$]]|$1|R|3|L|5|6|7|1K|8|@]|9|@]|C|$]]|$1|S|3|T|5|J|7|1L|8|@]|9|@]|C|$]]|$1|U|3|L|5|6|7|1M|8|@]|9|@]|C|$]]|$1|V|3|W|5|J|7|1N|8|@]|9|@]|C|$]]|$1|X|3|L|5|6|7|1O|8|@]|9|@]|C|$]]|$1|Y|3|-4|5|J|7|1P|8|@]|9|@]|C|$]]|$1|Z|3|10|5|6|7|1Q|8|@]|9|@]|C|$]]|$1|11|3|-4|5|6|7|1R|8|@]|9|@]|C|$]]]|12|$13|$5|14|15|16|C|$17|18]]]]

You can also use my nodejs ping wrapper <a href="https://github.com/reconbot/node-yaping" rel="nofollow">yaping</a>. One day we will get raw sockets in nodejs and we'll be able to make our own ping packets and lie about our response times. ;-)

This simple function should

<ul>
<li>do dns lookups</li>
<li>ping once</li>
<li>timeout after 10 seconds</li>
<li>communicate all the well though out error codes that ping provides</li>
<li>spawn a child processes out of wedlock</li>
</ul>

I want to ping a server from my node.js app.

Is that doable?

Thanks

How to "Ping" from a Node.js app?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想从我的node.js应用程序ping服务器。这是可行的吗？谢谢

问如何从Node.js应用程序中"Ping“？
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