Question re download timeout setting

[Alex Tweedly]

On 22/07/2023 01:02, prothero--- via use-livecode wrote:
> Folks:
> Sorry for the trivial question, but..
> I have an app on my iphone that I am updating from a several years old app the previously worked on an older version of livecode. It needs to access a mysql database on the internet. It works fine when there is internet service.
>
> I test access by downloading a file with a simple text code. If there code is returned in the message, I continue accessing the database. However, when there is no internet, the "put URL” command seems to hang forever. I’ve looked for a way to set the timeout for an internet command, but…. can’t,.
>
> Could you direct me to a simple explanation about how to set a reasonable internet not connected message?
>
.... not thoroughly tested ....

You should, I think, be able to do this using tsNetSetTimeouts. But I 
wouldn't :-)

I'd do something like the following - I've tested some, but not all, 
failure cases, but haven't tested a successful url.


> local sEventID
>
> -- neverhappens.com is a website - returns "Forbidden"
> -- nevehapens.com isn't, so almost immediately returns "can't be reached"
> -- I didn't test a properly working case :-)
>
> constant KURL = "http://neverhappens.com"
>
> on mouseup
>    load url kURL with message "gotareply"
>    send "timetocheck failed" to me in 10 seconds     -- or whatever 
> timeout you want
>    put the result into sEventID
> end mouseup
>
> on gotareply pURL, pURLStatus
>    cancel sEventID
>    timetocheck pURLStatus
> end gotareply
>
> on timetocheck pWhat
>    local tAnswer
>    put "time to check" && pWhat &CR after msg
>    if pWhat = "loaded" then
>       put URL kURL into tAnswer
>       if tAnswer contains "mycode" then
>          -- Internet is good
>          put "Internet is good" &CR after msg
>       end if
>    end if
>    -- Internet problematic
>    put "problem" &CR after msg
>    if pWhat = "error" then put libUrlErrorData(kURL) &CR after msg
>
>    unload URL KURL
> end timetocheck


Alex.