Not sure what to do.....can I run this by you guys?

Rick Harrison harrison at all-auctions.com
Fri Mar 16 15:53:44 CET 2018


Hi Mike,

I am finding that Safari is not honoring
the meta tag to turn off caching.  I thought
I would give your method a try.  I’m not
sure I am doing it right though because
that isn’t working either.

(Firefox does everything properly.)

I was thinking from your description that
it would look something like:

http://www.yourwebsite.com/coolpage.lc#48432 <http://www.yourwebsite.com/coolpage.lc#48432>

Is the above example of what you are discussing
correct?  If not could you please post an example?

Thanks,

Rick 

> On Mar 16, 2018, at 9:31 AM, Mike Bonner via use-livecode <use-livecode at lists.runrev.com> wrote:
> 
> Another way around the cache problem is to use the #2 trick at the end of
> the url.  Send each request with a pound and different number at the end of
> the url and it'll be seen as a new request thus doing an end run around the
> cache.  Since it designates an inline anchor position on the page, it
> should have zero affect on the way the url functions.  (unless things have
> changed, the associated anchor doesn't need to exist on the page)
> 
> Thanks for the neat trick Charles. :)
> 
> On Fri, Mar 16, 2018 at 7:24 AM, Tom Glod via use-livecode <
> use-livecode at lists.runrev.com> wrote:
> 
>> Wow....I'm impressed....thats quite a hack Charles..I will study all this
>> see how far I get.....
>> 
>> Thank you gentlemen....you are Rockstars!!
>> 
>> On Fri, Mar 16, 2018 at 7:13 AM, Lagi Pittas via use-livecode <
>> use-livecode at lists.runrev.com> wrote:
>> 
>>> Maybe not 100% reliable but ....
>>> 
>>> https://stackoverflow.com/questions/1341089/using-meta-
>>> tags-to-turn-off-caching-in-all-browsers
>>> 
>>> Regards Lagi
>>> 
>>> On 16 March 2018 at 09:48, Charles Warwick via use-livecode
>>> <use-livecode at lists.runrev.com> wrote:
>>>> Hi Tom,
>>>> 
>>>> If the site you are trying to contact has CORS enabled appropriately,
>>> then you can do something like this...
>>>> 
>>>> With the LiveCode browser widget, you can call JavaScript functions
>> from
>>> LC script and have the JavaScript functions call LC handlers in return.
>>> JavaScript has the capability to perform asynchronous HTTP requests.
>>>> 
>>>> You can create a HTML page that you automatically load up in the
>> browser
>>> widget that has a small JavaScript function which you can call from LC
>> with
>>> ‘do in widget’.   All this function needs to do is issue an asynchronous
>>> HTTP call to the URL passed to it as a parameter and when it receives the
>>> data, return it back to your LC script by calling a nominated LC handler
>>> and passing the returned data as a parameter.
>>>> 
>>>> The HTML page would look something like this:
>>>> 
>>>> <html>
>>>> <head>
>>>> <title>Javascript Async Test</title>
>>>> <script type="text/javascript">
>>>> 
>>>> function httpGetAsync(theUrl)
>>>> {
>>>>    var xmlHttp = new XMLHttpRequest();
>>>>    xmlHttp.onreadystatechange = function() {
>>>>        if (xmlHttp.readyState == 4 && xmlHttp.status == 200)
>>>>            liveCode.httpRequestComplete(theUrl,
>> xmlHttp.responseText);
>>>>    }
>>>>    xmlHttp.open("GET", theUrl, true); // true for asynchronous
>>>>    xmlHttp.send(null);
>>>> }
>>>> </script>
>>>> </head>
>>>> <body>
>>>> </body>
>>>> <html>
>>>> 
>>>> You can either load that from a file into the browser widget’s URL or
>>> set its htmlText property accordingly...
>>>> 
>>>> Then in LC, make sure you register the httpRequestComplete handler so
>>> that the widget can call it:
>>>> 
>>>> set the javascriptHandlers of widget “browser” to “httpRequestComplete”
>>>> 
>>>> After that, add a httpRequestComplete handler to the card script to
>>> handle the returned data:
>>>> 
>>>> on httpRequestComplete pUrl, pData
>>>>   — pUrl will be the URL requested
>>>>   — pData will be the data returned from the URL requested
>>>> end httpRequestComplete
>>>> 
>>>> Lastly, make your async requests....
>>>> 
>>>> do (“httpGetAsync(‘http://www.livecode.com’);” in widget “browser”
>>>> 
>>>> Since the JavaScript in the browser widget is issuing the requests and
>>> sending the data back to LC, it doesn’t need to display anything related
>> to
>>> it in the browser widget itself - it can be a blank canvas.
>>>> 
>>>> Just be aware that the browser widget can cache URLs and there is no
>>> easy way (that I know of?) in LC to clear the browser’s cache... so if
>> you
>>> see very quick responses on a second or subsequent request to the same
>> URL,
>>> it is likely pulling it all from the browser’s cache.
>>>> 
>>>> Cheers,
>>>> 
>>>> Charles
>>>> 
>>>>>> On 16 Mar 2018, at 1:35 pm, Tom Glod via use-livecode <
>>> use-livecode at lists.runrev.com> wrote:
>>>>>> 
>>>>>> Great hints there Mike .... thanks alot.  Luckily I'm desktop only
>>> right
>>>>>> now.
>>>>>> 
>>>>>> It shouldn't be too long before I sit down to make something that I
>> can
>>>>>> rely on and reuse in future projects.
>>>>>> 
>>>>>> Might turn out I will have to hire someone to help which is cool too.
>>>>>> 
>>>>>> It only has to be very simple..and does not need to match performance
>>> of
>>>>>> Tsnet.
>>>>>> 
>>>>>> Anything more than 1 would be a great start. LOL.
>>>>>> 
>>>>>> I will look into the libURL library and then try to guess which way I
>>>>>> should go my first attempt to hack this.
>>>>>> 
>>>>>> I'll keep you guys posted on the progress..I think I need a name for
>>> this
>>>>>> little project.
>>>>>> 
>>>>>> Thanks you
>>>>>> 
>>>>>> Tom
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