| Re: Is there a way to distinguish an auto-refresh from a manual page load? [message #177193 is a reply to message #177192] |
Sun, 26 February 2012 12:25   |
The Natural Philosoph
Messages: 993
Registered: September 2010
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crankypuss wrote:
> On 02/25/2012 10:21 AM, Beauregard T. Shagnasty wrote:
>> bill wrote:
>>
>>> The Natural Philosopher wrote:
>>>> Álvaro G. Vicario wrote:
>>>> > The Natural Philosopher wrote:
>>>> >> Cos I want to make a page slightly different depending... ..I cant
>>>> >> think of any parameter I might pass that would be affected by
>>>> >> autorefersh or not tho.
>>>> >>
>>>> >> Maybe javsacript and a timer would enable one?
>>>> >
>>>> > The "auto-refresh" concept implies some previous work on your side.
>>>> > It'd help a lot to know what's the code you wrote to accomplish it
>>>> > (JavaScript,<meta> tag or whatever). Whatever, I have the impression
>>>> > that it'd help even more to know the problem you want to fix rather
>>>> > than just the solution you figured out.
>>>>
>>>> Well I used a meta tag so that the client refreshes in case new info
>>>> has come in.
>>>>
>>>> However in this case the client can also POST new information, and I
>>>> don't want it POSTING the same information every 5 minutes or whatever.
>>>>
>>>>
>>>> The idea is to construct a not very real time view (5 minute
>>>> granularity is good enough) on some data, some of which the user can
>>>> change.
>>>>
>>>> I haven't tested it to see if a refresh is actually different from a
>>>> submit.
>>>
>>> UNTESTED:
>>> On the original submit, attach a parameter with a random number.
>>> Keep the sequence number in your database. On every invocation
>>> of the php script, check the number in the database. If it is the same
>>> as last time, it is a refresh. bill
>>
>> ..unless another visitor views the page in between. This 'database' would
>> have to also include at least the IP address and the random number, or
>> perhaps the IP and the date/time and the random number to ever have a
>> shot at being close.
>
> That's where the concept of a user session comes in handy. I've been
> doing other things for some time now, but prior to that I was building a
> text editor and it was able to flawlessly detect re-sends of POST-ed
> information, etc. The underlying code is doubtless more complex than
> most people would care to deal with, but it is possible.
I haven't got around to testing this, but it has been interesting
hearing deas - so thanks for all those.
It occurs to me if I do refresh under Javashite I can always hand set a
variable to say 'ignore the post variables, if they happen to be set'
BUT I have to say I am attracted to playing with web sockets sim0ply
because its new and a bit of a challenge. That avoids the need to
refresh the page ...at all.
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