Newbie question - using cgi to serve my app
Hello,
I'm new to this framework, so pardon my ignorance, but here goes:
I've spent a LOT of time trying to get this working on my server, and
now I have some specific questions:
I have gotten a project up and running, and I can verify it by
starting the paster server, and then running a lynx webserver to
localhost:5000. This shows I am getting the proper 'hello world'
controller working (and the route that directs to the hello controller
from the root url).
However, I am still stuck on how to get the public to view my site,
given that I am on a server without root privileges, and the Apache
install does not have mod_python, mod_wsgi, or mod_fcgi. I do have
mod_proxy, but I'm not clear how I can use that to serve my pages. I
suppose I could redirect certain urls to point to the port 5000 paster
server
I found an article on how to use straight CGI to serve a WSGI
application, and I got it working for static pages, by putting this
script (called test.py) in my cgi-bin directory:
#!/usr/home/rgamage/bin/python
from paste.deploy import loadapp
wsgi_app = loadapp('config:/usr/home/rgamage/siv/siv_production.ini')
import wsgiref.handlers
wsgiref.handlers.CGIHandler().run(wsgi_app)
If I have a static index.html in the public directory, then this
method works - going to http://mywebspace.com/cgi-bin/test.py yields
the proper static welcome page. However, if I delete that index.html,
I expect it to run the sample controller, hello, and instead I get
this series of exceptions:
Output of script follows:
=
Traceback (most recent call last):
File /usr/local/lib/python2.5/wsgiref/handlers.py, line 92, in run
self.result = application(self.environ, self.start_response)
File /usr/home/rgamage/lib/python2.5/site-packages/Paste-1.4.2-
py2.5.egg/paste/cascade.py, line 92, in __call__
return self.apps[-1](environ, start_response)
File /usr/home/rgamage/lib/python2.5/site-packages/Paste-1.4.2-
py2.5.egg/paste/registry.py, line 340, in __call__
app_iter = self.application(environ, start_response)
File /usr/home/rgamage/lib/python2.5/site-packages/Paste-1.4.2-
py2.5.egg/paste/recursive.py, line 80, in __call__
return self.application(environ, start_response)
File /usr/home/rgamage/lib/python2.5/site-packages/Paste-1.4.2-
py2.5.egg/paste/errordocument.py, line 185, in __call__
app_iter = self.application(environ, change_response)
File /usr/home/rgamage/lib/python2.5/site-packages/Paste-1.4.2-
py2.5.egg/paste/evalexception/middleware.py, line 180, in __call__
The EvalException middleware is not usable in a
AssertionError: The EvalException middleware is not usable in a multi-
process environment
Status: 500 Dude, this is whack!
Content-Type: text/plain
Content-Length: 59
A server error occurred. Please contact the administrator.
Any ideas you guys have would be much appreciated. Also, I don't
quite understand how I would reference different controllers using the
cgi method. The test.py script runs my application, but how would I
specify which controller or page within the app? Is this method even
a good idea, or should I make the jump to another hosting service that
provides mod_python or mod_wsgi?
Thanks,
Randy
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Re: Newbie question - using cgi to serve my app
Rudy escreveu: I do have mod_proxy, but I'm not clear how I can use that to serve my pages. I suppose I could redirect certain urls to point to the port 5000 paster server That would be probably a better idea than CGI. Pylons has a big startup cost; it's better to pay it once than on each request. I vaguely remember some gotchas, but Ian Bicking wrote some middleware to handle it. Ah, someone else went to the trouble of documenting it (thank James Gardnet and Ben Bangert): http://wiki.pylonshq.com/display/pylonscookbook/Apache+as+a+reverse+proxy+for+Pylons AssertionError: The EvalException middleware is not usable in a multi- process environment Clearly labeled. Edit the load_middleware function IIRC and have a look around, if you want to explore CGI a bit more deeply. Hope that helps, --lbruno signature.asc Description: OpenPGP digital signature
Re: Newbie question - using cgi to serve my app
Thanks for the reply. The only trouble with redirecting to the paster server is that I don't know if I can leave the paster running after I log out. Right now, I have to log in and start the paster server, then start another login window and run lynx to test the server. When I log out the process gets killed. I can start it as a backround task, but I think it will still be killed when I log out. Thanks, Randy On May 2, 9:58 am, Luis Bruno [EMAIL PROTECTED] wrote: Rudy escreveu: I do have mod_proxy, but I'm not clear how I can use that to serve my pages. I suppose I could redirect certain urls to point to the port 5000 paster server That would be probably a better idea than CGI. Pylons has a big startup cost; it's better to pay it once than on each request. I vaguely remember some gotchas, but Ian Bicking wrote some middleware to handle it. Ah, someone else went to the trouble of documenting it (thank James Gardnet and Ben Bangert):http://wiki.pylonshq.com/display/pylonscookbook/Apache+as+a+reverse+p... AssertionError: The EvalException middleware is not usable in a multi- process environment Clearly labeled. Edit the load_middleware function IIRC and have a look around, if you want to explore CGI a bit more deeply. Hope that helps, --lbruno signature.asc 1KDownload --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-discuss@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en -~--~~~~--~~--~--~---
Re: Newbie question - using cgi to serve my app
can you launch the paster server from within screen? That is how I do it when developing then when I go production I use daemontools to monitor it Rudy wrote: Thanks for the reply. The only trouble with redirecting to the paster server is that I don't know if I can leave the paster running after I log out. Right now, I have to log in and start the paster server, then start another login window and run lynx to test the server. When I log out the process gets killed. I can start it as a backround task, but I think it will still be killed when I log out. Thanks, Randy On May 2, 9:58 am, Luis Bruno [EMAIL PROTECTED] wrote: Rudy escreveu: I do have mod_proxy, but I'm not clear how I can use that to serve my pages. I suppose I could redirect certain urls to point to the port 5000 paster server That would be probably a better idea than CGI. Pylons has a big startup cost; it's better to pay it once than on each request. I vaguely remember some gotchas, but Ian Bicking wrote some middleware to handle it. Ah, someone else went to the trouble of documenting it (thank James Gardnet and Ben Bangert):http://wiki.pylonshq.com/display/pylonscookbook/Apache+as+a+reverse+p... AssertionError: The EvalException middleware is not usable in a multi- process environment Clearly labeled. Edit the load_middleware function IIRC and have a look around, if you want to explore CGI a bit more deeply. Hope that helps, --lbruno signature.asc 1KDownload --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-discuss@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en -~--~~~~--~~--~--~---
Re: Newbie question - using cgi to serve my app
On Fri, 2008-05-02 at 10:55 -0700, Rudy wrote: Thanks for the reply. The only trouble with redirecting to the paster server is that I don't know if I can leave the paster running after I log out. Right now, I have to log in and start the paster server, then start another login window and run lynx to test the server. When I log out the process gets killed. I can start it as a backround task, but I think it will still be killed when I log out. There's several utilities for managing this (screen, dtach, etc), but the good old-fashioned way is nohup: $ nohup paster serve myapp.cfg Regards, Cliff --~--~-~--~~~---~--~~ You received this message because you are subscribed to the Google Groups pylons-discuss group. To post to this group, send email to pylons-discuss@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/pylons-discuss?hl=en -~--~~~~--~~--~--~---
