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ecmascript reading xml from a remote server

Posted on 2004-08-04
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Last Modified: 2006-11-17
Hi,

For a voice-xml application I need to check the validity of user input. The voice system runs on a third party server and uses ECMAscript 262. I want to do a get/post to my own server (e.g. http://myserver/vxmlservice?input="1") which then checks the input and replies with true or false or a list of possible options (in xml format). How can I send the request and read the reply (in xml) with ECMAscript?

Many thanks in advance,

Adje
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Question by:adje_
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10 Comments
 
LVL 63

Expert Comment

by:Zvonko
ID: 11714220
With a hidden IFRAME you can call that server and read the response in the iframe onLoad event.
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LVL 63

Expert Comment

by:Zvonko
ID: 11714242
But the biggest problem in that approach is that both servers, the one who provides the parent page and the other whith the iframe url, both need to be in the same internet domain.
Otherwise there is a security restriuction to acces foreign domains.
That security restriction is removed when the main page is loaded localy with a file name extensio .hta



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Author Comment

by:adje_
ID: 11714694
The application is not a webbrowser. Is there an iframe object or some other object to instantiate, so I can make the request in ecmascript.

For instance,

myXml = new XML();
myXml.url = "http://myServer/..";
myXml.onLoad = function;
myXml.load();
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LVL 63

Expert Comment

by:Zvonko
ID: 11714758
Do you know HTA?
It stands for HyperTextApplication.

And for XML you use:
    var zipcode = "20166";
    var theURL = "http://mycontent.aol.com/widgets/weather/weather.psp?pid=bc&key=xiebie&format=xml&zipcode=" + zipcode;
    var httpReq = new ActiveXObject("Microsoft.XMLHTTP");
    httpReq.Open('GET',theURL,false);
    httpReq.Send();
   
    var xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
    xmlDoc.loadXML(httpReq.responseText);
    alert(httpReq.responseText);    
     
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Author Comment

by:adje_
ID: 11715610
Unfortunately, HTA as well as those nice ActiveX objects are not supported by the voice interpreter. Is there no crude old fashioned way. Like reading Http streams and put them in an object??
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LVL 63

Expert Comment

by:Zvonko
ID: 11715799
If your voice interpreter can execute JavaScript, then where is the problem to create ActiveX objects?
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Author Comment

by:adje_
ID: 11715875
Well, they say they support ecmascript and they do not run on a windows platform
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LVL 63

Accepted Solution

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Zvonko earned 125 total points
ID: 11716377
Ahh, ok see.
Buth then you need some other script engines. First idea would be Perl. They have packages for opening html streams.
Also php, but I do not know wether Perl nor PHP is ecma conform.
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