This is a bit of a rant, so if you're not in the mood, switch off now :-)
I will (when I've calmed down and organised myself :-) submit bug reports.
So, normally, I don't have much time for my favourite hobby of scripting
in LC, which lately has been mostly LCServer for a couple of simple
websites I have built for friends. But this week I had lots of time set
aside, because I've (finally) convinced one of those website owners to
do her own maintenance / updating of the site.
The site has many images - which I have typically put into my desktop
copy of the site, tried them out - and then synch'ed those up to the
real site. However, for the site owner to upload photos, I needed to
revive my script for uploading files (specifically images), which hasn't
been used in a while. And indeed, may have been played around with in
the meantime - so I can't be sure that this is exactly a "once-working"
script.
It was written a long time ago - back before there was any built-in way
to parse multi-part form content - so I did my own parsing of the POSTed
data (actually, I think someone else did it first, and I copied that :-)
However - that no longer works. Using $_POST_RAW fails when the uploaded
file is a jpg image - it works ok for text file, simple PNGs etc. - but
fails dramatically when the file is proper binary. Test script of
<?lc
set the errormode to inline
put "raw has" && the number of bytes in $_POST_RAW && "bytes<br>"
?>
fails with
file "/home/ua886128/public_html/tweedly.co.uk/tryme.lc"
row 3, col 18: Chunk: can't get source string
row 3, col 18: Chunk: error in chunk expression
.....
when the POSTed data includes a JPG file.
While google'ing around for that, I ran into the Livecode lesson on this
topic
http://lessons.livecode.com/m/4070/l/40708-how-to-upload-a-file-with-livecode-server
which uses the (newer) $_FILES array which does the complex parsing of
the file info from the form - a big improvement !! And indeed, the
example there works does work. BUT - it seems that although it correctly
parses out the file information, it loses any other POSTed values. So if
your form consists *ONLY* of one or more files to upload - you're good.
But if you pass any other values (e.g. folder you want it to go to,
meta-info, passwords, etc.) that is all lost. Which basically means it's
unusable for any real scenario.
I hear you asking - which version ? :-)
Well, it's on my on-rev account - so it's version 7.1.0 !! - pretty old
and out of date.
Off to check the on-rev documents - which claim that the default version
will be the latest released version. Nope!
Another google - how do I use a different version on on-rev ? Well,
there's a "lesson" for that too (
http://lessons.livecode.com/m/4070/l/41105-how-do-i-choose-which-livecode-server-engine-to-use-with-on-rev
)
Summary of Answer : use .htaccess, and specify the exact version I wish
to use; engines are stored in /cgi-bin/livecode-server-<version_number>
Hmmm - which ones are available ?
Turns out that /cgi-bin is read-protected (probably sensibly :-) - which
means there is no way to find out what ones there are. I tried a few
guesses, but didn't stumble into one - so unable to use on-rev.
Fortunately, I have another account somewhere else :-)
So - moved everything over to my HostM account (running 8.1.7), and with
this later version the $_FILES and $_POST arrays are both properly
available. Hurrah ! ($_POST_RAW still causes complete failure).
So - only 3 days later, I have finally got past a problem that shouldn't
even have existed - just occasionally I with I'd stuck with PHP :-)
But - still need to solve the problem of my database interactions -
which I want to do through revIgniter, rather than through my little
utility script for doing the actual upload. No problem - just take the
rest of the data, stick in a JSON-encoded cookie, and redirect back to
the revIgniter script on success.
That's when I ran into the problem that aArrayToJSON() isn't
(automatically) available on LCServer. Fortunately Devin has given me an
answer to that (Thanks!!) so I should be back on track in another hour
or two ...
End of rant. Thanks for listening :-)
Alex.
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