Rails spinoffs - Oct 2006 - AJAX Serach Results

I have got Ajax.Request posting the data i need to the search backend,
now the question is how do i return the data?  I have onSuccess setup
to read the returned text but really what im asking is what do i return
form the processor?  XML? CSV? And also how do i us this library to
process the returrned information?


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Well there may be better solutions depending on what language you''re 
using server side and what your data is exactly, but I pretty much 
always use JSON.
There is a library for it in pretty much every major language (I use php 
with php_json.dll) and it''s usage is as simple as (PHP example):
$data = Array(''somekey''=>''sometext'');
print json_encode($data); //where $data is any combination of arrays and 
associative arrays

On the client side, simply use eval. E.g.:

function json_decode(txt){
    try{
        return eval(''(''+txt+'')'');
    }catch(ex){}
}
onSuccess: function(xhr,obj){
    var results = json_decode(xhr.responseText);
    alert(results.somekey); //alerts "sometext"
}

Or if you sent the results in an "X-JSON" header:

onSuccess: function(xhr,obj){
    alert(obj.somekey); //alerts "sometext"
}

Colin

heispsychotic-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
wrote:
> I have got Ajax.Request posting the data i need to the search backend,
> now the question is how do i return the data?  I have onSuccess setup
> to read the returned text but really what im asking is what do i return
> form the processor?  XML? CSV? And also how do i us this library to
> process the returrned information?
>
>
> >
>
>   

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