I have found many scripts that can ping, but the result is always the ping of the .php files hosted server and not the ping of the user...
example: 1.1.1.1 wants to ping 3.3.3.3
the script was uploaded to 2.2.2.2
all the results i'm getting is a ping from 2.2.2.2 to 3.3.3.3 and not the actual users pc of 1.1.1.1....
i just need a script that i can put on a website so someone can see what server is 'fastest' for them...
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Try Zvonko's answer from this link:
http://www.experts-exchang
I'm afraid my JavaScript isn't that strong. You probably need to combine it with this one: http://www.experts-exchang
You probably want to do this:
var time=new Date()
var start=time.getTime()
before the loading of the test file/image and then get the time again afterwards, then subtract the start from the end.
I *think* it might be something like:
function ping(ipnum){
var ImageObject = new Image();
var time = new Date()
var start=time.getTime()
ImageObject.src = "http://"+ipnum+"/icons/ab
if(ImageObject.height>0){
alert("ping successful.");
} else {
alert("ping failed.");
}
return time.getTime() - start;
}
This would need to be called for each ipnum you want to check and this should probably be done when the page is loaded (in another function).
function pingServers()
{
// Create storage for the ping time of each server
// Loop through the servers, calling ping() for each IP number
// store the time taken
}
<body onload="pingServers()">
Then in the body of the document, I *think* you should be able to display the results of the pings.
My apologies for typos, errors etc. I told you my JavaScript wasn't too good ;-)
What you are trying to do is something that you *should not be able to do* security-wise. So whatever solution you come up with will either involve
a - exploiting a security leak in a web-browser (like javascript, java applets, activeX,...)
b - the user taking actions to accomplish the desired task
As stated before, it is simply not possible to do this on the server, so forget about cgi, php, asp, jsp and all the server-side stuff. You need to do it on the client machine and making a client machine do this without the users express consent is a security leak and should not be possible.
Sorry to disappoint you, but at least you won't be wasting time on this. There are other solutions, though. Feel free to ask for suggestions.
Regars,
- michael
I doubt that this is really what you are looking for. A download gives you information about throughput, not latency as ping does. And I would also be most interested in how this application accomplishes this via php!? What is it that you want to measure - throughput (download speed) or latency (e.g. for games)?
I'm utterly confused now...;-)
- michael
the server doesn't download the file, ratehr teh file is called just like any other object on a webpage and the download of the file into cache is timed. i beleive thats teh general reasoning behind it.
this is an extract from the "working" part of the script:
<script>
<!--
time = new Date();
starttime = time.getTime();
// -->
</script>
<?php
$data_file = "payload.bin";
$fd = fopen ($data_file, "rb");
if (isset($_GET['kbps'])) {
$test_kbytes = ($_GET['kbps'] / 8) * 10; //set the download to take 10 seconds
if ($test_kbytes > 3000) {
$test_kbytes = 3000;
}
} else {
$test_kbytes = $default_kbyte_test_size;
}
$contents = fread ($fd, $test_kbytes * 1024);
echo "<!-- $contents -->";
fclose ($fd);
?>
<script>
<!--
time = new Date();
endtime = time.getTime();
if (endtime == starttime)
{downloadtime = 0
}
else
{downloadtime = (endtime - starttime)/1000;
}
kbytes_of_data = <?php echo $test_kbytes; ?>;
linespeed = kbytes_of_data/downloadtim
kbps = (Math.round((linespeed*8)*
<?php
$nexturl = "results.php?kbps=' + kbps + '&downloadtime=' + downloadtime + '&KB=' + kbytes_of_data + '&recorded=1";
?>
nextpage='<?php echo $nexturl; ?>';
document.location.href=nex
// -->
</script>
I have tested this script and the results are proving accurate from the end users machine. People located closer to the server with higher connections are getting higher speeds than others. I guess this isn't really "pinging" as such, rather testing the line speed, but for the application, this could actually be better.
Thanks for posting the code - this only measures the download speed for the server on which the php script is running. If that's what you want, that's probably as good as it gets (although there are issues with accuracy, but there is no easy way around this). Also note that different browsers might yield (wildly) different results or won't work at all.
- michael
I think jimmack's solution is the only viable one...
Have the webpage run some script that attempts to download something from each of the servers. It might be possible to learn the pinf time (latency) by having it try to download a non-existant file. The alternative would be to write a complicated ActiveX app that the client would download embedded in a page (security alert and all, probably).
-- Dan
Business Accounts
Answer for Membership
by: jimmackPosted on 2004-01-14 at 08:21:36ID: 10112109
I'm not really sure how you intend this to work. It seems that the client at 1.1.1.1 opens a page on the server 2.2.2.2, but then you want the client to independently ping 3.3.3.3
There is no "ping" facility available in (for example) JavaScript, which is executed client-side.
The only way I can think of that might possibly give you some speed information is quite cumbersome. That would be to load a small amount of data from each server you want to check (3.3.3.3, 4.4.4.4 etc.) and time the responses.
You can't do anything from the server side, because, as you have identified, the ping is from the server, not the client.