AJAX html won't refresh after data update

**Robin** · Oct 4 '07, 02:55 PM

Re: AJAX html won't refresh after data update

javelin wrote:

I created a feature in a page where a DIV displays child records of
the current record. From this same page, I can submit the insertion of
a new child record. However, the while the previous child records
displayed fine, the newly added ones don't - until I close down IE and
restart it. I know, there's a setting in IE options which will force a
refresh on each page load, instead of caching, but I can't access it
from these computers (NT policy prohibits it, I guess). None of the
end users can either, so that's not a solution. Anything I can do
programmaticall y here?

Add a 'unique' variable to the query string of you ajax URI so that
browser doesn't use the cached copy.

i.e.
obj.open('GET', 'ajax_call.php? recid='+recid+' &z='+
new Date().getTime( ),true);

HTH
Robin

**Good Man** · Oct 4 '07, 03:15 PM

Re: AJAX html won't refresh after data update

javelin <google.1.jvmai l@spamgourmet.c omwrote in
news:1191507760 .733314.137170@ 22g2000hsm.goog legroups.com:

I created a feature in a page where a DIV displays child records of
the current record. From this same page, I can submit the insertion of
a new child record. However, the while the previous child records
displayed fine, the newly added ones don't - until I close down IE and
restart it. I know, there's a setting in IE options which will force a
refresh on each page load, instead of caching, but I can't access it
from these computers (NT policy prohibits it, I guess). None of the
end users can either, so that's not a solution. Anything I can do
programmaticall y here?

Send an expired header with your data. Here's a straight lift from PHP
code:

//IE CACHES AJAX PAGES!!!
header("Expires : Sun, 19 Nov 1978 05:00:00 GMT");
header("Last-Modified: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Cache-Control: no-store, no-cache, must-revalidate");
header("Cache-Control: post-check=0, pre-check=0", false);
header("Pragma: no-cache");

.... followed by the correct headers and data for the XML or whatever output
you send back....

**cts1@spvision.com** · Oct 5 '07, 05:55 PM

Re: AJAX html won't refresh after data update

Dang, Robin! That actually works! Not used to getting such good help
the first time around :D

Thanks for the great idea.

J

On Oct 4, 9:52 am, Robin <a...@somewhere .comwrote:

javelin wrote:

I created a feature in a page where a DIV displays child records of
the current record. From this same page, I can submit the insertion of
a new child record. However, the while the previous child records
displayed fine, the newly added ones don't - until I close down IE and
restart it. I know, there's a setting in IE options which will force a
refreshon each page load, instead of caching, but I can't access it
from these computers (NT policy prohibits it, I guess). None of the
end users can either, so that's not a solution. Anything I can do
programmaticall y here?

>
Add a 'unique' variable to the query string of you ajax URI so that
browser doesn't use the cached copy.
>
i.e.
obj.open('GET', 'ajax_call.php? recid='+recid+' &z='+
new Date().getTime( ),true);
>
HTH
Robin

**Thomas 'PointedEars' Lahn** · Oct 5 '07, 06:05 PM

Re: AJAX html won't refresh after data update

cts1@spvision.c om wrote:

On Oct 4, 9:52 am, Robin <a...@somewhere .comwrote:

>Add a 'unique' variable to the query string of you ajax URI so that
>browser doesn't use the cached copy.
>>
>i.e.
>obj.open('GET' ,'ajax_call.php ?recid='+recid+ '&z='+
> new Date().getTime( ),true);

>
Dang, Robin! That actually works! Not used to getting such good help
the first time around :D
>
Thanks for the great idea.

That idea is BAD because it fills the browser cache with garbage, and so
eventually slows down access to other content. Unnecessarily.

Please don't top-post: http://jibbering.com/faq/

PointedEars
--
realism: HTML 4.01 Strict
evangelism: XHTML 1.0 Strict
madness: XHTML 1.1 as application/xhtml+xml
-- Bjoern Hoehrmann

**cts1@spvision.com** · Oct 5 '07, 06:35 PM

Re: AJAX html won't refresh after data update

Dang, Robin! That actually works! Not used to getting such good help
the first time around :D

Thanks for the great idea.

J

On Oct 4, 9:52 am, Robin <a...@somewhere .comwrote:

javelin wrote:

I created a feature in a page where a DIV displays child records of
the current record. From this same page, I can submit the insertion of
a new child record. However, the while the previous child records
displayed fine, the newly added ones don't - until I close down IE and
restart it. I know, there's a setting in IE options which will force a
refreshon each page load, instead of caching, but I can't access it
from these computers (NT policy prohibits it, I guess). None of the
end users can either, so that's not a solution. Anything I can do
programmaticall y here?

>
Add a 'unique' variable to the query string of you ajax URI so that
browser doesn't use the cached copy.
>
i.e.
obj.open('GET', 'ajax_call.php? recid='+recid+' &z='+
new Date().getTime( ),true);
>
HTH
Robin

**Randy Webb** · Oct 5 '07, 10:15 PM

Re: AJAX html won't refresh after data update

Thomas 'PointedEars' Lahn said the following on 10/5/2007 2:00 PM:

cts1@spvision.c om wrote:

>On Oct 4, 9:52 am, Robin <a...@somewhere .comwrote:

>>Add a 'unique' variable to the query string of you ajax URI so that
>>browser doesn't use the cached copy.
>>>
>>i.e.
>>obj.open('GET ','ajax_call.ph p?recid='+recid +'&z='+
>> new Date().getTime( ),true);

>Dang, Robin! That actually works! Not used to getting such good help
>the first time around :D
>>
>Thanks for the great idea.

>
That idea is BAD because it fills the browser cache with garbage, and so
eventually slows down access to other content. Unnecessarily.

Pure nonsense.

--
Randy
Chance Favors The Prepared Mind
comp.lang.javas cript FAQ - http://jibbering.com/faq/index.html
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

**Thomas 'PointedEars' Lahn** · Oct 5 '07, 11:45 PM

Re: AJAX html won't refresh after data update

Randy Webb wrote:

Thomas 'PointedEars' Lahn said the following on 10/5/2007 2:00 PM:

>cts1@spvision.c om wrote:

>>On Oct 4, 9:52 am, Robin <a...@somewhere .comwrote:
>>>Add a 'unique' variable to the query string of you ajax URI so that
>>>browser doesn't use the cached copy.
>>>>
>>>i.e.
>>>obj.open('GE T','ajax_call.p hp?recid='+reci d+'&z='+
>>> new Date().getTime( ),true);
>>Dang, Robin! That actually works! Not used to getting such good help
>>the first time around :D
>>>
>>Thanks for the great idea.

>That idea is BAD because it fills the browser cache with garbage, and so
>eventually slows down access to other content. Unnecessarily.

>
Pure nonsense.

(sic!)

It isn't nonsense, it's a fact. (Or have I overlooked your argument by any
chance?)

PointedEars
--
var bugRiddenCrashP ronePieceOfJunk = (
navigator.userA gent.indexOf('M SIE 5') != -1
&& navigator.userA gent.indexOf('M ac') != -1
) // Plone, register_functi on.js:16

**Randy Webb** · Oct 6 '07, 02:35 AM

Re: AJAX html won't refresh after data update

Thomas 'PointedEars' Lahn said the following on 10/5/2007 7:41 PM:

Randy Webb wrote:

>Thomas 'PointedEars' Lahn said the following on 10/5/2007 2:00 PM:

>>cts1@spvision.c om wrote:
>>>On Oct 4, 9:52 am, Robin <a...@somewhere .comwrote:
>>>>Add a 'unique' variable to the query string of you ajax URI so that
>>>>browser doesn't use the cached copy.
>>>>>
>>>>i.e.
>>>>obj.open('G ET','ajax_call. php?recid='+rec id+'&z='+
>>>> new Date().getTime( ),true);
>>>Dang, Robin! That actually works! Not used to getting such good help
>>>the first time around :D
>>>>
>>>Thanks for the great idea.
>>That idea is BAD because it fills the browser cache with garbage, and so
>>eventually slows down access to other content. Unnecessarily.

>Pure nonsense.

>
(sic!)
>
It isn't nonsense, it's a fact. (Or have I overlooked your argument by any
chance?)

You have overlooked the argument. There is a very good reason for using
a query string to force a reload from the server. And no, headers and
server settings won't satisfy the need.

--
Randy
Chance Favors The Prepared Mind
comp.lang.javas cript FAQ - http://jibbering.com/faq/index.html
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

**Laurent vilday** · Oct 6 '07, 04:45 AM

Re: AJAX html won't refresh after data update

Thomas 'PointedEars' Lahn a écrit :

Randy Webb wrote:

>Thomas 'PointedEars' Lahn said the following on 10/5/2007 2:00 PM:

>>cts1@spvision.c om wrote:
>>>On Oct 4, 9:52 am, Robin <a...@somewhere .comwrote:
>>>>Add a 'unique' variable to the query string of you ajax URI so that
>>>>browser doesn't use the cached copy.
>>>Dang, Robin! That actually works! Not used to getting such good help
>>>the first time around :D
>>>Thanks for the great idea.
>>That idea is BAD because it fills the browser cache with garbage, and so
>>eventually slows down access to other content. Unnecessarily.

>Pure nonsense.

(sic!)
>
It isn't nonsense, it's a fact.

sic !

It is well-known among competent Web developers that IE is suffering a
cache issue with XHR when the call method is "GET". And no headers will
do anything to it.

The only solution is to add a dummy unique variable to the querysting.

*That* is a fact among others !

--
laurent

**Thomas 'PointedEars' Lahn** · Oct 6 '07, 08:45 AM

Re: AJAX html won't refresh after data update

Randy Webb wrote:

Thomas 'PointedEars' Lahn said the following on 10/5/2007 7:41 PM:

>Randy Webb wrote:

>>Thomas 'PointedEars' Lahn said the following on 10/5/2007 2:00 PM:
>>>cts1@spvision.c om wrote:
>>>>On Oct 4, 9:52 am, Robin <a...@somewhere .comwrote:
>>>>>Add a 'unique' variable to the query string of you ajax URI so
>>>>>that browser doesn't use the cached copy.
>>>>>>
>>>>>i.e. obj.open('GET', 'ajax_call.php? recid='+recid+' &z='+ new
>>>>>Date().get Time(),true);
>>>>Dang, Robin! That actually works! Not used to getting such good
>>>>help the first time around :D
>>>>>
>>>>Thanks for the great idea.
>>>That idea is BAD because it fills the browser cache with garbage,
>>>and so eventually slows down access to other content.
>>>Unnecessaril y.
>>Pure nonsense.

>(sic!)
>>
>It isn't nonsense, it's a fact. (Or have I overlooked your argument by
>any chance?)

>
You have overlooked the argument.

There was no argument. There was a statement.

There is a very good reason for using a query string to force a reload
from the server. And no, headers and server settings won't satisfy the
need.

You have not stated the reason; that is no argument, it is a statement.

PointedEars
--
Prototype.js was written by people who don't know javascript for people
who don't know javascript. People who don't know javascript are not
the best source of advice on designing systems that use javascript.
-- Richard Cornford, cljs, <f806at$ail$1$8 300dec7@news.de mon.co.uk>

**Thomas 'PointedEars' Lahn** · Oct 6 '07, 08:45 AM

Re: AJAX html won't refresh after data update

Laurent vilday wrote:

Thomas 'PointedEars' Lahn a écrit :

>Randy Webb wrote:

>>Thomas 'PointedEars' Lahn said the following on 10/5/2007 2:00 PM:
>>>cts1@spvision.c om wrote:
>>>>On Oct 4, 9:52 am, Robin <a...@somewhere .comwrote:
>>>>>Add a 'unique' variable to the query string of you ajax URI so that
>>>>>browser doesn't use the cached copy.
>>>>Dang, Robin! That actually works! Not used to getting such good help
>>>>the first time around :D
>>>>Thanks for the great idea.
>>>That idea is BAD because it fills the browser cache with garbage, and so
>>>eventually slows down access to other content. Unnecessarily.
>>Pure nonsense.

>(sic!)
>>
>It isn't nonsense, it's a fact.

>
sic !
>
It is well-known among competent Web developers that IE is suffering a
cache issue with XHR when the call method is "GET". And no headers will
do anything to it.

Where is your proof for that?

The only solution is to add a dummy unique variable to the querysting.

Non sequitur.

*That* is a fact among others !

You have to prove that.

PointedEars
--
Prototype.js was written by people who don't know javascript for people
who don't know javascript. People who don't know javascript are not
the best source of advice on designing systems that use javascript.
-- Richard Cornford, cljs, <f806at$ail$1$8 300dec7@news.de mon.co.uk>

**Bart Van der Donck** · Oct 6 '07, 10:25 AM

Re: AJAX html won't refresh after data update

Thomas 'PointedEars' Lahn wrote:

Laurent vilday wrote:

>It is well-known among competent Web developers that IE is suffering a
>cache issue with XHR when the call method is "GET". And no headers will
>do anything to it.

>
Where is your proof for that?

The proof for IE is below.

>The only solution is to add a dummy unique variable to the querysting.
>*That* is a fact among others !

You have to prove that.

XMLHttpRequest: open() method - Web APIs | MDN

http://msdn2.microsoft.com/en-us/library/ms536648.aspx

The XMLHttpRequest method open() initializes a newly-created request, or re-initializes an existing one.

| Microsoft Internet Explorer caches the results of HTTP GET
| requests in the Temporary Internet Files (TIF) folder. In
| most cases, caching improves performance for data that will
| not change frequently. To guarantee that the results are not
| cached, use POST.

If you want to use 'GET' anyway, use a randomized query-string.

--
Bart

**Laurent vilday** · Oct 6 '07, 04:45 PM

Re: AJAX html won't refresh after data update

Thomas 'PointedEars' Lahn a écrit :

Laurent vilday wrote:

>It is well-known among competent Web developers that IE is suffering a
>cache issue with XHR when the call method is "GET". And no headers will
>do anything to it.

>
Where is your proof for that?

LOL, and you really pretend to know your stuff ?

This issue is *VERY* well known, can't you do a few google search to
know what you talking about ?

Or better, actually spend more time working with the technology you
pretend to know instead of babbling about it ?

You will discover a lot of things. Reality is *far* away from anything
you keep pretending to know !

>The only solution is to add a dummy unique variable to the querysting.

>
Non sequitur.

<p lang="fr">
Je comprend pas ta langue gamin, te la joues pas avec ton latin pourri !
</p>

>*That* is a fact among others !

You have to prove that.

LOL, why would I have to proove anything ? Since when did c.l.j. became
your helpdesk ? I'm not here to educated you ! Do your searches, read
books (even bad ones), read webpages, experiment, get *LOT* more of real
experience. Then, come back to us if you have any questions !

Days after days, you saying a lot of nonsense without prooving much. Why
would I have to proove anything more to you when I'm right ?

<FAQENTRY>
4.45 [IE - XHR - GET] Why is my AJAX page not updated from IE cache when
using HTTP GET request ?
Microsoft Internet Explorer caches the results of HTTP GET requests. If
you need a non cached version of the page, you will have to use a
randomized query-string or use a HTTP POST request. No headers or server
configuration will do any help to it.
<http://msdn2.microsoft .com/en-us/library/ms536648.aspx>
</FAQENTRY>

ps : Thomas, I already know my english sucks, no need to correct my
english grammar errors in this message except the FAQENTRY of course.

--
laurent

**Randy Webb** · Oct 6 '07, 07:25 PM

Re: AJAX html won't refresh after data update

Thomas 'PointedEars' Lahn said the following on 10/6/2007 1:18 PM:

Laurent vilday wrote:

><FAQENTRY>
>4.45 [IE - XHR - GET] Why is my AJAX page not updated from IE cache when
>using HTTP GET request ?
>Microsoft Internet Explorer caches the results of HTTP GET requests. If
>you need a non cached version of the page, you will have to use a
>randomized query-string or use a HTTP POST request. No headers or server
>configuratio n will do any help to it.

>
That is your statement, still lacking proof.

When I have tested it extensively, it has proof. If you want proof, then
you are welcome to test it yourself.

><http://msdn2.microsoft .com/en-us/library/ms536648.aspx>

>
There is _nothing_ there that says the caching behavior cannot be controlled
by headers. In fact, it would be very weird behavior if IE's HTTP
implementation would obey cache control headers in normal operation (and it
does) and would not when it is triggered through the IXMLHTTPRequest interface.

Perhaps you should follow the rest of the advice in the post you replied
to and get out in the real world and find out how things really work
instead of trying to defend the way you think things *should* work.
Especially when the way you think they work and the way they work are
not the same.

--
Randy
Chance Favors The Prepared Mind
comp.lang.javas cript FAQ - http://jibbering.com/faq/index.html
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

AJAX html won't refresh after data update

AJAX html won't refresh after data update

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