Posted by amygdala on 04/19/07 08:36

"Marvin Zhang" <zyeming@gmail.com> schreef in bericht
news:1176969782.001596.208900@e65g2000hsc.googlegroups.com...
>> The XMLHttpRequest object for using AJAX stuff has a property
>> 'readyState'
>> which can be:
>>
>> 0 // Uninitialized
>> 1 // Loading
>> 2 // Loaded
>> 3 // Interactive
>> 4 // Finished
>>
>> If I were to hack something you have in mind I would look at Loading and
>> Interactive (not sure what the latter does)
>>
>> My guess is that if you address one of these while the page is loading
>> and
>> have PHP flush the buffer once in a while you could catch an XML node
>> called
>> 'loadedSoFar' or any output for that matter to poll the state of the
>> page.
>
> Hi,
>
> Thank you for you reply.
>
> I tried this method. Under Firefox, it works great. Every time the
> server script calls flush(), the callback function of Ajax request
> will be called with readyState set to 3. So I can update the progress
> with the responseText variable. But unfortunately, this doesn't work
> in IE. In IE, the callback will only be called only once with
> readyState set to 3.
>

Alright, maybe the following will be a big resource hog on the client:
But what about (in IE that is) a javascript loop to poll responseText, say
every 500ms, for as long as readyState is 3 and hasn't changed?

By the way, I'm curious: how is your alternative coming along?

Cause what I didn't quite understand is how your suggested alternative
differs from the initial problem. You said you would poll the database now,
in stead of a session var right? But how are you gonna do that without a
second AJAX object?

Cheers

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