Using LC server to check for existence of mp3 on our web server?

[Mike Bonner]

If you have php on your second server, and don't have lc, you can do a
check with php similar to what you're talking about.  This is untested but..

If you have the following php file (perhaps named checkforfile.php) on the
alternate server, and send it a get request containing the path to the file
youre looking for, it will return true or false if it exists.  This is
obviously an extremely bare example.  You'd want to make sure the get
contains "myfile" and handle that too, as well as any other issues.   In
addition, you would probably want to limit the requests to only allowed
areas and file types in the php script.
<?php
echo file_exists($_GET["myfile"]);
?>

>From the lc side of things you could do something like this..

<?lc
   get url "
http://your.alternateserver.com/checkforfile.php?myfile=theFile.mp3"
   if it is true then
      put "<audio src=http://my.programserver.com/theFile.mp3>"
  else
      put "program not found."
  end if
?>

Of course if you DO have lc on the program server you can do the same type
of check and "put" true or false just like you did with php.  (Also can be
done with javascript, asp, etc)
On Sun, Jan 22, 2017 at 2:16 AM, Phil Davis via use-livecode <
use-livecode at lists.runrev.com> wrote:

> Hi Tim,
>
> Here is a very simplistic way of checking for a file on your server. It
> assumes your mp3 files are in a 'programs' folder that resides in the
> 'document root' folder. This script as it is here would be in a .lc file on
> your server. You pass it a filename in the url and it tells you if the file
> is in the programs folder or not.
>
> So the url would look something like this:
>
>    http://my.programserver.com/check.lc?1234.mp3
>
>
> The text of the 'check.lc' file:
>
>    <?lc
>       set the errorMode to "inline"
>       put $_SERVER["QUERY_STRING"] into tFilename
>       put $_SERVER["DOCUMENT_ROOT"] & "/programs/" & tFilename into tPath
>       if there is a file tPath then
>           put "Found file" && q(tFilename)
>       else
>           put "Did not find file" && q(tFilename)
>       end if
>    ?>
>
>
>    <?lc
>    function q pString
>         return quote & pString & quote
>    end q
>    ?>
>
> This is most likely not exactly what you need, but maybe it'll give you a
> starting point.
>
> Thanks -
> Phil Davis
>
>
>
> On 1/21/17 11:36 PM, Tim Selander via use-livecode wrote:
>
>> Hi,
>>
>> On-rev.com hosting, using LC server to present a list of our AM/FM radio
>> programs for people to listening to on-demand.
>>
>> Out of a month's 20 programs, 3 or 4 might not get uploaded due to
>> copyright issues, etc. Also, mp3's are not on the on-rev.com server, but
>> another hosting service we use as well.
>>
>> Filenaming is standardized, so I know the list of programs. I want to hit
>> the server, if the mp3 files exists, present it as an <audio src=, if the
>> mp3 file does not exists, present a "Sorry, program not available" message.
>>
>> If I wanted to check on the existence of a small text file, it would be
>> fast enough for me to just get it, put it into a variable and see if the
>> variable has anything in it. But mp3's are too big, so too slow.
>>
>> Locally, I would simply write "if there is a file 'filename'..."  --
>> what's the equivalent command for checking on existence of a file on a
>> server?
>>
>> Thanks in advance.
>>
>> Tim Selander
>> Tokyo, Japan
>>
>>
>>
>>
>>
>>
>>
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>>
> --
> Phil Davis
>
>
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