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JavaScript: Check Server Status

 
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Hi All,

I have a little javascript file that connects to my server & downloads another file. Basically, what I want to do is write a small script that deals with the possibility of the server being down. It will check the server's url, if it is found then it will continue there, if it is not found it will try a different server.

I can't find anything on the web for a function to manage this. If anyone knows a function that will do it, i'd appreciate it.

Thanks a million,
Celine
 
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If you were going to use a file on your local server and see if it existed, you could have used XMLHttpRequest object, but since it is on another server, you would get security errors.

So the way I would do it is with an image on that server

<img src="yourUrl/theImage.jpg" style="width:0;height:0;visiblity:hidden;position:absolute;" onerror="functionError()">

Eric
 
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Can you give me a full example of this, i'm not that good at this kind of thing. As in the whole html source of that page

Many thanks,
mikemm
[ May 08, 2005: Message edited by: mike mm ]
 
Eric Pascarello
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Whole source for what one of the two?
 
mike mm
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from your post please
 
Eric Pascarello
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There is two answers, the onerror solution and the xmlhttprequest solution...

which one?
 
mike mm
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Oh the onError one
 
Eric Pascarello
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Are you looking for something like this?



Eric
 
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Hi Eric

Whats the way u can do that with XML HttpRequest ?? I know how to send a request , but how to check whether there is any return value or not so that i can get to know if server is running ??
 
Eric Pascarello
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The code here where we look for a page by using a username and password checks to see if a page is available, but you can not check accross domains without changing the security setings for the site.

http://radio.javaranch.com/pascarello/2005/06/24/1119626686861.html

Eric
 
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