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OT maybe, python and apache
From: Garrett Gaston
------------------------------------------------------
I'M trying to get the below python cgi output to load in my web browser=20
but the browser is just displaying the code it's self instead of the=20
output. My apache program is working because I just tried the phpinfo=20
function and it worked just fine. I'M getting this code from a book and=20
it's actually showing "#!/usr/bin/env python" but I decided to use what I
got with the which command "which python3" -> /usr/bin/python3
I have one copy of the file in /var/www and another in /var/www/cgi-bin.
I've also used grep and vi to find and edit every file in /etc/apache2=20
that contains "ExecCGI' and I've removed that # in front of it hoping to
turn on apache's cgi function. Could someone please tell me what I've=20
done wrong here? Thanks.
#!/usr/bin/python3
print('Content-type: text/plain')
# prints an empty line=2C to end the headers
print('Testing Python CGI')
=
===============================================================
From: Eric Wolf
------------------------------------------------------
Is the execute permission set so the apache user can run the script?
===============================================================
From: Dan Lyke
------------------------------------------------------
On Tue, 13 Nov 2012 10:21:38 -0600
Garrett Gaston wrote:
Two problems, one of which I know what the answer to is. Let's start
with the unknown one first: Your Apache isn't running your app as a
CGI. I do something like:
ScriptAlias /cgi-bin/ /home/danlyke/websites/flutterby.net/cgi-bin/
AllowOverride None
Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
Order allow,deny
Allow from all
To make http://localhost/cgi-bin/test.py run
from /home/danlyke/websites/flutterby.net/cgi-bin/
The second is easy:
You need a blank line between the headers and the content, so add a
line here that says:
print('')
Dan
===============================================================
From: Garrett Gaston
------------------------------------------------------
Dan=2C on the script you just sent me back:
ScriptAlias /cgi-bin/ /home/danlyke/websites/flutterby.net/cgi-bin/
AllowOverride None
Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
Order allow=2Cdeny
Allow from all
=20
What file did you find this in? Looking through my /etc/apache2 directory I=
found several files with ScriptAlias=2C > every file in /etc/apache2 that contains "ExecCGI' and I've removed
===============================================================
From: Garrett Gaston
------------------------------------------------------
Both files have rx on both user and others=2C I think the permissions are 7=
55. I created two files=2C one under /var/www/file.cgi and another under /v=
ar/www/cgi-bin/file.cgi. I had read where the file might need to be named w=
ith a .cgi extension or that it might need to be placed in a sup directory =
called cgi-bin. So I created two files both with .cgi extensions but one fi=
le is one more level down in cgi-bin directory right under /var/www/.
Date: Tue=2C 13 Nov 2012 09:27:32 -0700
From: ebwolf@gmail.com
To: chugalug@chugalug.org
Subject: Re: [Chugalug] OT maybe=2C python and apache
Is the execute permission set so the apache user can run the script?
On Nov 13=2C 2012 9:22 AM=2C "Garrett Gaston" wrote=
:
I'M trying to get the below python cgi output to load in my web browser=20
but the browser is just displaying the code it's self instead of the=20
output. My apache program is working because I just tried the phpinfo=20
function and it worked just fine. I'M getting this code from a book and=20
it's actually showing "#!/usr/bin/env python" but I decided to use what I
got with the which command "which python3" -> /usr/bin/python3
I have one copy of the file in /var/www and another in /var/www/cgi-bin.
I've also used grep and vi to find and edit every file in /etc/apache2=20
that contains "ExecCGI' and I've removed that # in front of it hoping to
turn on apache's cgi function. Could someone please tell me what I've=20
done wrong here? Thanks.
#!/usr/bin/python3
print('Content-type: text/plain')
# prints an empty line=2C to end the headers
print('Testing Python CGI')
=20
===============================================================
From: Dan Lyke
------------------------------------------------------
On Tue, 13 Nov 2012 10:51:28 -0600
Garrett Gaston wrote:
On Ubuntu, I put that segment in
/etc/apache2/sites-enabled/000-default
On some bastardized abomination like SL6... Uh... I mean, on my work
machine, that'd be in /etc/httpd/conf/httpd.conf unless you set up
something else (which I would).
So I actually just muck around with Apache stuff 'til it works, and
then never touch it again, but...
I believe that "ScriptAlias x /y/z/w" says "for every request that looks
like http:/blabla/x/, look on the local filesystem in the
folder /y/z/w".
Then the "" tag says "Within this directory on the file
system, use these options". If you use the "" tag
instead, you're saying "Within this path on the HTTP request". I think.
I *think* that this setup basically says "Assume everything there is a
CGI script", which means that:
simple1.cgi should work just fine. As should simple1.py.
Dan
===============================================================
From: Dan Lyke
------------------------------------------------------
On Tue, 13 Nov 2012 10:21:38 -0600
Garrett Gaston wrote:
I'm assuming that you've got this working now, but I wanted to note:
It used to be that we specified which interpreter we wanted with
#!/usr/bin/python or #!/usr/local/bin/python or #!/opt/run/python
or ... well ... you get the picture.
The problem was that when you tried to share a script file with someone
they'd say "Hey, I don't have "/opt/run/python" on my computer,
what'sup?"
This got even worse when you had dueling source control checkins. I
make it point to my favorite Python interpreter, check it in, you check
out the latest software, it breaks your build, you fix it to your
interpreter, check it in, after two or three rounds of that we're on to
passive-aggressive solutions like poisoning your lunch, or fouling up
your romantic entanglements, or kneecapping the starters in your
favorite sports leagues.
Finally, someone said "Hey, let's make /usr/bin/env find and run the
appropriate interpreter from the path, and if people want to
run /yargh/really/my/funky/build/python then they can change that in
their own personal environment and not inflict it on the rest of us."
Hope this helps explain things a bit.
Dan
===============================================================
From: Garrett Gaston
------------------------------------------------------
Thanks. I've never understood why there are seemingly so many paths to prog=
rams in Linux. Coming from windows everything is C:\Program Files\NameOfPro=
gram\program.exe
So are you saying that I should use #!/usr/bin/enc python3 or am I misunder=
standing you? I'M going to give it a try=2C and no I actually hadn't got th=
is working yet.
ck
to
===============================================================
From: wes
------------------------------------------------------
he was just explaining a bit about why it is the way it is. you should use
whatever works for you. once it works, don't mess with it!
without making backups that is. this is a good time to extol the virtues of
good backups. when you screw something up, as we all inevitably do, they
suddenly become PRICELESS! in the early stages, it would be great to get
into the habit of copying any files you're about to modify. I put a date on
anything that's only mine (on my own system) and on a shared system, I
include my name.
cp .bashrc .bashrc.2012-11-17
vi .bashrc
actually, the example I randomly chose above reminds me to raise another
point that I hope you never have to struggle with. when modifying login
related things, KEEP YOUR CURRENT SESSION GOING. immediately after saving,
start a new SSH session or virtual terminal on the host and make sure you
can still get in. if not, you can always switch back to the session you
still have open and fix it.
don't learn the hard way! I did. and it sucked.
-wes
===============================================================
From: Eric Wolf
------------------------------------------------------
Garrett,
Not to sound snotty, but on my Windows 7 box, Python is in C:\Python26\bin,
C:\ArcGIS\Python25\bin, C:\Python27\bin (and probably a few other
places)... Not a single copy of Python is in C:\Program
Files\Python\python.exe... I also seem to have quite a number of programs
in C:\Windows, C:\Windows\System, C:\Windows\System32, C:\Windows\SysWOW64.
I know that in older versions of Windows, there was no System32 or SysWOW64.
Linux is no different. Stuff moves around. That's where things like
'locate' come in handy.
-Eric
-=--=---=----=----=---=--=-=--=---=----=---=--=-=-
Eric B. Wolf 720-334-7734