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

Tom Glod tom at makeshyft.com
Fri Mar 16 15:12:57 CET 2018


Yes Mike that is a helpful trick.

On Fri, 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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