Checking for an internet connectio

[Peter Haworth]

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>
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>>
> --
> Phil Davis
>
>
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