How to clear the cache

Alex Tweedly alex at tweedly.net
Sun May 19 18:52:19 EDT 2013


Shawn,
you have a couple of issues here ...

1. (minor)
if this is the entire script, then   tCount is a local (i.e. handler 
local) variable, so it is re-created each time the handler is called, so 
you finish up with the same value each time. I think you ant to make it 
a script-local variable (i.e. declare it outside any handler) and then 
it retains its value from one call to the next. (I'm also paranoid, so I 
added a check for it not being a number). And since it's a script-local, 
I renamed it to sCount :-)

2. in line 3, you have an extra keyword "URL" You have

    *put* URL ("www.google.com?count=" & tCount) into pURL

and you need to simply have

    *put* ("www.google.com?count=" & tCount) into pURL

We are just trying to build up the string of the URL - what you had was 
trying to fetch it.

3. (trivial) I renamed pURL to tURL just to follow convention - it's a 
local variable, not a parameter :-)


I changed those - and a couple of other things for my testing, and got 
the following script which seems to work OK; fails with "invalid host 
address" when wifi is switched off.



local sCount
on mouseUp
    if sCount is not a number then
       put 1 into sCount
    else
       add 1 to sCount
    end if
    put   ("http://www.google.com/?count=" & sCount) into tURL
    put the millisecs && tURL &CR& the Result &CR&CR after field "F" -- 
just for testing
    get URL tURL
    if the result is empty then
       put the millisecs &&"success" &CR after field "F"
    else
       put the millisecs && the result &CR after field "F"
    end if
end mouseUp

-- Alex.

On 19/05/2013 17:56, Shawn Blc wrote:
> Alex,
>
> I added your idea of varying the URL each time, but still not able to get
> the script to work correctly.  See below.
>
> For instance, on my mac, when I disable wifi I shouldn't be able to
> connect, when I enable my wifi I should be able to connect.
>
> What's wrong with my script?
>
>
> *on* mouseUp
>
>     *add* 1 to tCount
>
>     *put* URL ("www.google.com?count=" & tCount) into pURL
>
>     *get* URL pURL
>
>     *put* the result into tResult
>
>     *if* tResult is not empty *then*
>
>        *put* "disconnected" && tResult into field "fldStatus"
>
>        *show* image "imageRed"
>
>        *hide* image "imageGreen"
>
>        *return* false
>
>     *else*
>
>        *put* "connected" into field "fldStatus"
>
>        *show* image "imageGreen"
>
>        *hide* image "imageRed"
>
>     *end* *if*
>
> *end* mouseUp
>
>
> On Sun, May 19, 2013 at 9:06 AM, Alex Tweedly <alex at tweedly.net> wrote:
>
>> unload URL tURL
>>
>> or if you prefer make the URL vary each time
>>
>> add 1 to tCount
>> put ("http://mydomain.com/**theurlname.lc?count=<http://mydomain.com/theurlname.lc?count=>"
>> & tCount) into tURL
>> and use that URL.
>>
>> -- Alex.
>>
>>
>>
>> On 19/05/2013 12:59, Shawn Blc wrote:
>>
>>> I have a little script to check for an internet connection.  Problem is
>>> that if I take this little script out of the preOpenCard and put it into a
>>> button the results are the same.  It keeps the last state, regardless if I
>>> disconnect my wifi or not.  I'm thinking that the URL that I'm connecting
>>> to to check for an internet connection is still in cache.
>>>
>>> How would I clear this cache?   These don't work.
>>> clear URL
>>> clear cache
>>>
>>> Any help is appreciated or at least point me in the right direction.
>>>
>>> Dank.
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