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Re: Pass varible with out URL and SESSION [message #179988 is a reply to message #179985] Tue, 25 December 2012 01:23 Go to previous messageGo to previous message
Jerry Stuckle is currently offline  Jerry Stuckle
Messages: 2598
Registered: September 2010
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On 12/24/2012 5:26 PM, Denis McMahon wrote:
> On Mon, 24 Dec 2012 13:56:17 -0500, Jerry Stuckle wrote:
>
>> On 12/24/2012 11:40 AM, Denis McMahon wrote:
>>> On Mon, 24 Dec 2012 08:30:45 -0500, Jerry Stuckle wrote:
>>>
>>>> On 12/24/2012 4:30 AM, Andy wrote:
>>>> >> well exactly. There are only three ways to keep track of a browser
>>>> >> state between pages: cookie, GET or POST.
>>>> >
>>>> > In the words of Yoda "There is another"...
>>>> >
>>>> > You guys won't like it but I thought it worth mentioning that you can
>>>> > also use a hidden frame and store any variable to be passed back to
>>>> > the next content page.
>>>
>>>> Which still comes back in the GET or POST values, as applicable.
>>>
>>> I think Andy is suggesting a client side method that uses javascript to
>>> store a variable in a higher level frame between page loads. This could
>>> be used to pass data between the javascript code running in two pages
>>> on a client without passing the data through the server.
>>>
>>> It's a similar approach to using js to create a cookie on the client
>>> side that can be read by js in another page on the client side, to pass
>>> data between pages on the client side without relying on the server.
>>>
>>> However, as we already agreed (I think), until we have more information
>>> about what the OP actually wants to do, and specifically whether he's
>>> trying to pass state information between pages on the client or on the
>>> server, it's a bit pointless debating the ins and outs of the various
>>> possible methods.
>
>> But it's still passed back to the server via POST or GET. All he's
>> suggesting is a different way of storing it on the client (i.e. instead
>> of a hidden field in a form).
>
> No, he's suggesting a way to pass data from a client side script running
> in one page on the client to a client page script running in another page
> on the client *without* going back through the server at all.
>
> Scenario:
>
> A frameset has javascript methods set( param, value ) and get(param)
>
> Any pages loaded into a subframe of that frameset, from the same host (xss
> restrictions will apply if the page is from a different host) can call
> the set and get methods in the parent frameset to store / retrieve values
> that will never be passed through the server.
>
> I once wrote a shopping catalogue that ran 100% in client side javascript
> doing this, for someone who was running on a hosting provider that only
> made a basic mailform cgi available. Customers could browse the
> catalogue, pick out their goods, and then mail their shopping list to the
> company using the mailform cgi.
>
> The (mom & pop) company would then contact the customer, confirm the
> requirement, put it on their van and deliver it, collecting payment when
> they delivered.
>
> The only time that any "data" apart from plain page requests got sent to
> the server was after the complete order had been assembled, when it was
> sent to the mailform cgi on the server, and that could have been avoided
> by generating a mail uri that would have launched the default mail
> application on the client computer and populate the message text.
>
> The same can be done with a javascript cookie, although the cookie in
> that case does get sent to the server the server just discards it, but
> the javascript in different pages from the same host (again security
> constraints apply) on the client can read and write the cookie and use it
> to pass data values between themselves.
>

Which is just another way of storing data on the client. It doesn't do
a bit of good getting data back to the server so PHP can act on it - cgi
or otherwise.

--
==================
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex(at)attglobal(dot)net
==================

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