Checking for an internet connectio

[Peter Haworth]

Thanks Dar.  You're right, Phil's solution answers a better question than
the one I asked since it kills two birds with one stone - is there an
internet connection and is the server responding.
Pete
lcSQL Software <http://www.lcsql.com>



On Sat, Apr 28, 2012 at 3:40 PM, Dar Scott <dsc at swcp.com> wrote:

> Hi, Peter,
>
> I like Phil's solution, but it does answer a slightly different question
> from you said you want to ask.  I think it is a better question.  It
> answers not only if there is an Internet connection but  also whether your
> update server is online and reachable.  That might be more of the question
> you wanted your script to ask.  It does not say whether there are ftp/http
> services available on your download server.
>
> You might want to check with a quick ping by hand to make sure icmp
> services are available on you server (which they are likely to be).
>
> Dar
>
>
> On Apr 28, 2012, at 2:24 PM, Peter Haworth wrote:
>
> > Great, thanks a lot Phil, I'll give that a whirl.
> > Pete
> > lcSQL Software <http://www.lcsql.com>
> >
> >
> >
> > On Sat, Apr 28, 2012 at 12:30 PM, Phil Davis <revdev at pdslabs.net> wrote:
> >
> >> Hi Peter,
> >>
> >> I use "ping" to see if a given server is available. There are fewer bad
> >> things that can happen using this approach than trying to get a URL. The
> >> following code came from a recent project (slightly modified to protect
> the
> >> innocent) - watch line wraps:
> >>
> >>
> >> on mouseUp
> >>  answer "Connection status =" && app_connectionStatus("google.**com<
> http://google.com>
> >> ")
> >> end mouseUp
> >>
> >>
> >>
> >> function app_connectionStatus pTargetDomain
> >>
> >>   -- attempt to ping the ctrainweb.com server
> >>   switch (the platform)
> >>       case "MacOS"
> >>           put shell("ping -c 1 -t 5" && pTargetDomain) into tShellOutput
> >>           put the result into tResult
> >>           break
> >>       case "Win32" -- PD 20100411
> >>           set the hideConsoleWindows to true
> >>           put shell("ping -n 1 -w 5" && pTargetDomain) into tShellOutput
> >>           put the result into tResult
> >>           break
> >>       default -- all other OSes
> >>           answer "This app cannot run on the" && the platform &&
> >> "platform."
> >>           put param(0) & colon && the platform && "platform not
> >> supported" into tResult
> >>           break
> >>   end switch
> >>
> >>   -- check for connection failure
> >>   if tResult <> empty
> >>   then return false -- failed
> >>   else -- connected, but how well?
> >>       set the itemDel to comma
> >>       if the platform = "Win32"
> >>       then
> >>           get tShellOutput
> >>           filter it with "*(0% loss)*"
> >>       else -- Mac
> >>           repeat for each item tFilter in "* 0% packet loss*,* 0.0%
> >> packet loss*" -- for different OS versons
> >>               get tShellOutput
> >>               filter it with tFilter
> >>               if it <> empty then exit repeat
> >>           end repeat
> >>       end if
> >>       return (it <> empty)
> >>   end if
> >> end app_connectionStatus
> >>
> >>
> >> HTH
> >> Phil Davis
> >>
> >>
> >>
> >>
> >> On 4/28/12 12:12 PM, Peter Haworth wrote:
> >>
> >>> Just put together a procedure for checking for software updates from my
> >>> SQLiteAdmin program.  All works great but I'm wondering the best way to
> >>> check if there is an internet connection.  I tried this out by
> >>> disconnecting my computer from my wireless router and I got an"invalid
> >>> host
> >>> address" message from libURLErrorData as soon as I called
> >>> libURLDownloadToFile.
> >>>
> >>> I can easily check for that of course but it sounds like that message
> >>> could
> >>> come back in other circumstances so wondering if there's some other
> way to
> >>> check for an internet connection before attempting a download.
> >>>
> >>> Pete
> >>> lcSQL Software<http://www.lcsql.com>
> >>> ______________________________**_________________
> >>> use-livecode mailing list
> >>> use-livecode at lists.runrev.com
> >>> Please visit this url to subscribe, unsubscribe and manage your
> >>> subscription preferences:
> >>> http://lists.runrev.com/**mailman/listinfo/use-livecode<
> http://lists.runrev.com/mailman/listinfo/use-livecode>
> >>>
> >>>
> >> --
> >> Phil Davis
> >>
> >>
> >> ______________________________**_________________
> >> use-livecode mailing list
> >> use-livecode at lists.runrev.com
> >> Please visit this url to subscribe, unsubscribe and manage your
> >> subscription preferences:
> >> http://lists.runrev.com/**mailman/listinfo/use-livecode<
> http://lists.runrev.com/mailman/listinfo/use-livecode>
> >>
> > _______________________________________________
> > use-livecode mailing list
> > use-livecode at lists.runrev.com
> > Please visit this url to subscribe, unsubscribe and manage your
> subscription preferences:
> > http://lists.runrev.com/mailman/listinfo/use-livecode
>
>
> _______________________________________________
> use-livecode mailing list
> use-livecode at lists.runrev.com
> Please visit this url to subscribe, unsubscribe and manage your
> subscription preferences:
> http://lists.runrev.com/mailman/listinfo/use-livecode
>