Real-time ping result using ajax

Question

I'm trying to create a web application which can display the results of a ping command real-time. I'm using JSP in the backend. I'm actually getting the result correctly. But the problem is, the result is not displayed in real-time. The application processes the ping command and dumps the result all at once. What I need is that, the application has to display the result line after line as and when a line of result is obtained.

Here is my code

String ip = request.getParameter("ipaddress");

String pingCmd = "ping -c 3 " + ip;

Runtime runtime = Runtime.getRuntime();

Process p = runtime.exec(pingCmd);

BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
String inputLine;

while ((inputLine = in.readLine()) != null)
{
    out.println(inputLine + "<br />");
}
in.close();

What is the change I need to make in this code.

Regards

Sunil Kumar B M

use 1 ping instead and loop it three times . Isn't there some ping class you can use ? also, this isn't ajax — f2lollpll, Feb 03 '12 at 05:39
@Walkerneo: The code I've mentioned above is a java servlet code. I'll use ajax call to invoke this code — Sunil Kumar B M, Feb 03 '12 at 05:56
@sjums : If I use one ping and loop it n times, it shows some prologue data before the result and statistics after that. Is there any other way?? — Sunil Kumar B M, Feb 03 '12 at 06:00
And then It's hosted, viewed in a browser which parse it,and execute the javascript before we get to your question, so you better add Apache,Chrome,webkit,V8, xmlhttprequest and TCP to the tags — f2lollpll, Feb 03 '12 at 06:02
@sjums: what is the use of -a arg in ping? the man page says it 'audible ping' — Sunil Kumar B M, Feb 03 '12 at 06:12

score 0 · Answer 1 · answered Feb 03 '12 at 06:20

0

You can do this with a comet servlet. For tomcat 6: http://tomcat.apache.org/tomcat-6.0-doc/aio.html

answered Feb 03 '12 at 06:20

Maurice Perry

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comet takes too much of resources in terms of processing, is there any other alternative?? – Sunil Kumar B M Feb 03 '12 at 07:01

Real-time ping result using ajax

1 Answers1