I would do this with chained onSuccess handlers. Each one would
trigger a new request to a different endpoint, carrying some token to
identify the visitor.
$('button').observe('click',function(evt){
//do your lookup
new Ajax.Request('lookup.php',{
parameters:{id:'?=$id?'},
onCreate:function(){
$('message').update('searching...');;
},
onSuccess:function(transport){
//make your pdf
$('message').update('making PDF...');;
new Ajax.Request('pdf.php',{
parameters:{id:'?=$id?'},
onCreate:..., //you get the idea
onSuccess:...
});
}
}};
});
Walter
On Dec 9, 2009, at 11:11 AM, joe t. wrote:
i think i've seen examples of this, but can't recall where, and could
use some guidance.
Obviously it's easy to handle a 1:1 Request/Response
How can i do a true 1:many process? For instance:
Client takes a single action which requires the server to perform 3
tasks:
* Query database
* Generate PDF
* Generate email, attach PDF, and send
How can i respond to the client as EACH task is accomplished without
ending the request chain?
Looking up your data . . . (time-based dots as delay indicator)
Creating PDF . . .
Email sent (or failed, as the case may be)
Is this done with HTTP 2xx headers? Recursive callbacks? If anyone can
point me in the right direction (which include samples), i'd be
grateful.
Thanks.
-joe t.
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