Re: HEAD request and internal server error
Hi Graham,
This looks like a workaround, but in the core I§m talking about
exception when I also return . I don't understand why I can't react
to HEAD request, because exception will be raised in all cases (no
care if I return something or not).
So the middleware is now best way, but it's hack and I not understand
what exactly I should do here. Where is the point ? I'm voting for
problem in pylons that should be corrected.
I will look at it tonight, but if I need to write my own middleware to
create normal searchable web then it seems me that pylons is hacky
framework:(
Thanks for help:)
Petr
2008/9/17 Graham Dumpleton [EMAIL PROTECTED]:
On Sep 17, 10:59 am, Petr Kobalíček [EMAIL PROTECTED]
wrote:
Hi Wyatt,
my biggest problem with this is that HEAD requests are used by bots,
so the pylons pages are not indexable at all. This is big problem for
me and I don't know how to solve this, because we are creating
ecommerce software using pylons, sqlalchemy and qooxdoo for
administration. I'm using pylons also for my web and here I found the
problem:-(
So, any ideas ;-) ?
A workaround is to wrap your WSGI application in a middleware which
changes REQUEST_METHOD from HEAD to GET and which discards the
iterable returned from the application. The middleware should ensure
it still calls close() on the iterable properly though as per WSGI
specification requirements.
Alternatively, you could make it work by hosting with Apache/mod_wsgi
and configuring Apache to enable Apache CONTENT_LENGTH output filter
for the application. This will work as when an Apache output filter is
configured, mod_wsgi will convert a HEAD request to a GET request
before passing it to the WSGI application. This is done so that actual
response content can be passed back to the Apache output filter, which
may want to adjust response headers based on the content. Apache will
discard any response content after any output filters are done with it
and will not send it back to the client.
If this isn't done with Apache/mod_wsgi, the HEAD and GET requests may
not yield the same response headers. The CONTENT_LENGTH output filter
is chosen here purely because it is pretty benign, any Apache output
filter would have been enough to trigger this behaviour.
Graham
Cheers
- Petr
2008/9/17 Wyatt Baldwin [EMAIL PROTECTED]:
On Sep 16, 3:18 pm, Petr Kobalíček [EMAIL PROTECTED] wrote:
So it's related to this
ticked:http://pylonshq.com/project/pylonshq/ticket/507
I can't solve this bug myself, can anybody help me ? (I'm now using
pylons from mercurial, but without success)
Cheers
- Petr
2008/9/16 Petr Kobalíček [EMAIL PROTECTED]:
So,
this is pylons bug !
I tried to create plain application and to add hello controller
(that's in documentation).
The i tried this script:
import httplib
req = httplib.HTTPConnection(localhost:5000)
req.request(HEAD, /hello/index)
res = req.getresponse()
print res.status, res.reason
Ad I got internal server error
Exception: No content returned by controller (Did you remember to
'return' it?) in: 'HelloController'
So, what to do, is there any solution ?
Cheers
- Petr
2008/9/16 Petr Kobalíček [EMAIL PROTECTED]:
Hi devs,
I have problem with HEAD requests that causes me Internal server error.
The error exception:
Exception happened during processing of request from ('127.0.0.1',
4948)
Traceback (most recent call last):
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 1056, in process_request_in_thread
self.finish_request(request, client_address)
File C:\PROGRA~1\Python25\lib\SocketServer.py, line 254, in
finish_request
self.RequestHandlerClass(request, client_address, self)
File C:\PROGRA~1\Python25\lib\SocketServer.py, line 521, in __init__
self.handle()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 432, in handle
BaseHTTPRequestHandler.handle(self)
File C:\PROGRA~1\Python25\lib\BaseHTTPServer.py, line 316, in handle
self.handle_one_request()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 427, in handle_one_request
self.wsgi_execute()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 287, in wsgi_execute
self.wsgi_start_response)
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
gzipper.py, line 35, in __call__
return self.application(environ, start_response)
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
registry.py, line 350, in __call__
app_iter = self.application(environ, start_response)
File c:\program
files\python25\lib\site-packages\Beaker-1.0.1-py2.5.egg\beake
r\middleware.py, line
Re: HEAD request and internal server error
Thank you Philip, it's now working ! Best regards - Petr 2008/9/17 Philip Jenvey [EMAIL PROTECTED]: On Sep 16, 2008, at 1:57 AM, Petr Kobalíček wrote: Note, I read every document on internet related to pylons and HEAD, but I think problem is in pylons itself. I tried simple test like this: class PagePublicController(base.BaseController): def index_ROOT(self): return or class PagePublicController(base.BaseController): def index_ROOT(self): return [] and this produces internal server error too. here is some interesting stuff, but not solves my problem: http://pylonshq.com/pasties/922 So my question is, it's a bug or I'm doing something wrong ? This is now fixed in mercurial tip. Thanks for pointing it out as we missed tagging that ticket for the 0.9.7 release, and this was a critical issue. -- Philip Jenvey --~--~-~--~~~---~--~~ 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: HEAD request and internal server error
So,
this is pylons bug !
I tried to create plain application and to add hello controller
(that's in documentation).
The i tried this script:
import httplib
req = httplib.HTTPConnection(localhost:5000)
req.request(HEAD, /hello/index)
res = req.getresponse()
print res.status, res.reason
Ad I got internal server error
Exception: No content returned by controller (Did you remember to
'return' it?) in: 'HelloController'
So, what to do, is there any solution ?
Cheers
- Petr
2008/9/16 Petr Kobalíček [EMAIL PROTECTED]:
Hi devs,
I have problem with HEAD requests that causes me Internal server error.
The error exception:
Exception happened during processing of request from ('127.0.0.1', 4948)
Traceback (most recent call last):
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 1056, in process_request_in_thread
self.finish_request(request, client_address)
File C:\PROGRA~1\Python25\lib\SocketServer.py, line 254, in finish_request
self.RequestHandlerClass(request, client_address, self)
File C:\PROGRA~1\Python25\lib\SocketServer.py, line 521, in __init__
self.handle()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 432, in handle
BaseHTTPRequestHandler.handle(self)
File C:\PROGRA~1\Python25\lib\BaseHTTPServer.py, line 316, in handle
self.handle_one_request()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 427, in handle_one_request
self.wsgi_execute()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 287, in wsgi_execute
self.wsgi_start_response)
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
gzipper.py, line 35, in __call__
return self.application(environ, start_response)
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
registry.py, line 350, in __call__
app_iter = self.application(environ, start_response)
File c:\program
files\python25\lib\site-packages\Beaker-1.0.1-py2.5.egg\beake
r\middleware.py, line 74, in __call__
return self.app(environ, start_response)
File c:\program
files\python25\lib\site-packages\Beaker-1.0.1-py2.5.egg\beake
r\middleware.py, line 147, in __call__
return self.wrap_app(environ, session_start_response)
File c:\program
files\python25\lib\site-packages\Routes-1.9.2-py2.5.egg\route
s\middleware.py, line 100, in __call__
response = self.app(environ, start_response)
File c:\my\python\pylons\pylons\wsgiapp.py, line 112, in __call__
to 'return' it?) in: %r % controller.__name__)
Exception: No content returned by controller (Did you remember to 'return'
it?)
in: 'PagePublicController'
Note, I read every document on internet related to pylons and HEAD,
but I think problem is in pylons itself. I tried simple test like
this:
class PagePublicController(base.BaseController):
def index_ROOT(self):
return
or
class PagePublicController(base.BaseController):
def index_ROOT(self):
return []
and this produces internal server error too.
here is some interesting stuff, but not solves my problem:
http://pylonshq.com/pasties/922
So my question is, it's a bug or I'm doing something wrong ?
Cheers
- Petr
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pylons-discuss group.
To post to this group, send email to pylons-discuss@googlegroups.com
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-~--~~~~--~~--~--~---
Re: HEAD request and internal server error
So it's related to this ticked: http://pylonshq.com/project/pylonshq/ticket/507
I can't solve this bug myself, can anybody help me ? (I'm now using
pylons from mercurial, but without success)
Cheers
- Petr
2008/9/16 Petr Kobalíček [EMAIL PROTECTED]:
So,
this is pylons bug !
I tried to create plain application and to add hello controller
(that's in documentation).
The i tried this script:
import httplib
req = httplib.HTTPConnection(localhost:5000)
req.request(HEAD, /hello/index)
res = req.getresponse()
print res.status, res.reason
Ad I got internal server error
Exception: No content returned by controller (Did you remember to
'return' it?) in: 'HelloController'
So, what to do, is there any solution ?
Cheers
- Petr
2008/9/16 Petr Kobalíček [EMAIL PROTECTED]:
Hi devs,
I have problem with HEAD requests that causes me Internal server error.
The error exception:
Exception happened during processing of request from ('127.0.0.1', 4948)
Traceback (most recent call last):
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 1056, in process_request_in_thread
self.finish_request(request, client_address)
File C:\PROGRA~1\Python25\lib\SocketServer.py, line 254, in finish_request
self.RequestHandlerClass(request, client_address, self)
File C:\PROGRA~1\Python25\lib\SocketServer.py, line 521, in __init__
self.handle()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 432, in handle
BaseHTTPRequestHandler.handle(self)
File C:\PROGRA~1\Python25\lib\BaseHTTPServer.py, line 316, in handle
self.handle_one_request()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 427, in handle_one_request
self.wsgi_execute()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 287, in wsgi_execute
self.wsgi_start_response)
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
gzipper.py, line 35, in __call__
return self.application(environ, start_response)
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
registry.py, line 350, in __call__
app_iter = self.application(environ, start_response)
File c:\program
files\python25\lib\site-packages\Beaker-1.0.1-py2.5.egg\beake
r\middleware.py, line 74, in __call__
return self.app(environ, start_response)
File c:\program
files\python25\lib\site-packages\Beaker-1.0.1-py2.5.egg\beake
r\middleware.py, line 147, in __call__
return self.wrap_app(environ, session_start_response)
File c:\program
files\python25\lib\site-packages\Routes-1.9.2-py2.5.egg\route
s\middleware.py, line 100, in __call__
response = self.app(environ, start_response)
File c:\my\python\pylons\pylons\wsgiapp.py, line 112, in __call__
to 'return' it?) in: %r % controller.__name__)
Exception: No content returned by controller (Did you remember to 'return'
it?)
in: 'PagePublicController'
Note, I read every document on internet related to pylons and HEAD,
but I think problem is in pylons itself. I tried simple test like
this:
class PagePublicController(base.BaseController):
def index_ROOT(self):
return
or
class PagePublicController(base.BaseController):
def index_ROOT(self):
return []
and this produces internal server error too.
here is some interesting stuff, but not solves my problem:
http://pylonshq.com/pasties/922
So my question is, it's a bug or I'm doing something wrong ?
Cheers
- Petr
--~--~-~--~~~---~--~~
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: HEAD request and internal server error
On Sep 16, 3:18 pm, Petr Kobalíček [EMAIL PROTECTED] wrote:
So it's related to this ticked:http://pylonshq.com/project/pylonshq/ticket/507
I can't solve this bug myself, can anybody help me ? (I'm now using
pylons from mercurial, but without success)
Cheers
- Petr
2008/9/16 Petr Kobalíček [EMAIL PROTECTED]:
So,
this is pylons bug !
I tried to create plain application and to add hello controller
(that's in documentation).
The i tried this script:
import httplib
req = httplib.HTTPConnection(localhost:5000)
req.request(HEAD, /hello/index)
res = req.getresponse()
print res.status, res.reason
Ad I got internal server error
Exception: No content returned by controller (Did you remember to
'return' it?) in: 'HelloController'
So, what to do, is there any solution ?
Cheers
- Petr
2008/9/16 Petr Kobalíček [EMAIL PROTECTED]:
Hi devs,
I have problem with HEAD requests that causes me Internal server error.
The error exception:
Exception happened during processing of request from ('127.0.0.1', 4948)
Traceback (most recent call last):
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 1056, in process_request_in_thread
self.finish_request(request, client_address)
File C:\PROGRA~1\Python25\lib\SocketServer.py, line 254, in
finish_request
self.RequestHandlerClass(request, client_address, self)
File C:\PROGRA~1\Python25\lib\SocketServer.py, line 521, in __init__
self.handle()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 432, in handle
BaseHTTPRequestHandler.handle(self)
File C:\PROGRA~1\Python25\lib\BaseHTTPServer.py, line 316, in handle
self.handle_one_request()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 427, in handle_one_request
self.wsgi_execute()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 287, in wsgi_execute
self.wsgi_start_response)
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
gzipper.py, line 35, in __call__
return self.application(environ, start_response)
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
registry.py, line 350, in __call__
app_iter = self.application(environ, start_response)
File c:\program
files\python25\lib\site-packages\Beaker-1.0.1-py2.5.egg\beake
r\middleware.py, line 74, in __call__
return self.app(environ, start_response)
File c:\program
files\python25\lib\site-packages\Beaker-1.0.1-py2.5.egg\beake
r\middleware.py, line 147, in __call__
return self.wrap_app(environ, session_start_response)
File c:\program
files\python25\lib\site-packages\Routes-1.9.2-py2.5.egg\route
s\middleware.py, line 100, in __call__
response = self.app(environ, start_response)
File c:\my\python\pylons\pylons\wsgiapp.py, line 112, in __call__
to 'return' it?) in: %r % controller.__name__)
Exception: No content returned by controller (Did you remember to 'return'
it?)
in: 'PagePublicController'
Note, I read every document on internet related to pylons and HEAD,
but I think problem is in pylons itself. I tried simple test like
this:
class PagePublicController(base.BaseController):
def index_ROOT(self):
return
or
class PagePublicController(base.BaseController):
def index_ROOT(self):
return []
and this produces internal server error too.
here is some interesting stuff, but not solves my problem:
http://pylonshq.com/pasties/922
So my question is, it's a bug or I'm doing something wrong ?
Cheers
- Petr
I just put a Pylons 0.9.7rc1 app into production and am see a bunch of
these errors, too. Mostly, they seem to be coming from user agents
other than browsers.
--~--~-~--~~~---~--~~
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pylons-discuss group.
To post to this group, send email to pylons-discuss@googlegroups.com
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-~--~~~~--~~--~--~---
Re: HEAD request and internal server error
On Sep 17, 10:59 am, Petr Kobalíček [EMAIL PROTECTED]
wrote:
Hi Wyatt,
my biggest problem with this is that HEAD requests are used by bots,
so the pylons pages are not indexable at all. This is big problem for
me and I don't know how to solve this, because we are creating
ecommerce software using pylons, sqlalchemy and qooxdoo for
administration. I'm using pylons also for my web and here I found the
problem:-(
So, any ideas ;-) ?
A workaround is to wrap your WSGI application in a middleware which
changes REQUEST_METHOD from HEAD to GET and which discards the
iterable returned from the application. The middleware should ensure
it still calls close() on the iterable properly though as per WSGI
specification requirements.
Alternatively, you could make it work by hosting with Apache/mod_wsgi
and configuring Apache to enable Apache CONTENT_LENGTH output filter
for the application. This will work as when an Apache output filter is
configured, mod_wsgi will convert a HEAD request to a GET request
before passing it to the WSGI application. This is done so that actual
response content can be passed back to the Apache output filter, which
may want to adjust response headers based on the content. Apache will
discard any response content after any output filters are done with it
and will not send it back to the client.
If this isn't done with Apache/mod_wsgi, the HEAD and GET requests may
not yield the same response headers. The CONTENT_LENGTH output filter
is chosen here purely because it is pretty benign, any Apache output
filter would have been enough to trigger this behaviour.
Graham
Cheers
- Petr
2008/9/17 Wyatt Baldwin [EMAIL PROTECTED]:
On Sep 16, 3:18 pm, Petr Kobalíček [EMAIL PROTECTED] wrote:
So it's related to this
ticked:http://pylonshq.com/project/pylonshq/ticket/507
I can't solve this bug myself, can anybody help me ? (I'm now using
pylons from mercurial, but without success)
Cheers
- Petr
2008/9/16 Petr Kobalíček [EMAIL PROTECTED]:
So,
this is pylons bug !
I tried to create plain application and to add hello controller
(that's in documentation).
The i tried this script:
import httplib
req = httplib.HTTPConnection(localhost:5000)
req.request(HEAD, /hello/index)
res = req.getresponse()
print res.status, res.reason
Ad I got internal server error
Exception: No content returned by controller (Did you remember to
'return' it?) in: 'HelloController'
So, what to do, is there any solution ?
Cheers
- Petr
2008/9/16 Petr Kobalíček [EMAIL PROTECTED]:
Hi devs,
I have problem with HEAD requests that causes me Internal server error.
The error exception:
Exception happened during processing of request from ('127.0.0.1', 4948)
Traceback (most recent call last):
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 1056, in process_request_in_thread
self.finish_request(request, client_address)
File C:\PROGRA~1\Python25\lib\SocketServer.py, line 254, in
finish_request
self.RequestHandlerClass(request, client_address, self)
File C:\PROGRA~1\Python25\lib\SocketServer.py, line 521, in __init__
self.handle()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 432, in handle
BaseHTTPRequestHandler.handle(self)
File C:\PROGRA~1\Python25\lib\BaseHTTPServer.py, line 316, in handle
self.handle_one_request()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 427, in handle_one_request
self.wsgi_execute()
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
httpserver.py, line 287, in wsgi_execute
self.wsgi_start_response)
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
gzipper.py, line 35, in __call__
return self.application(environ, start_response)
File c:\program
files\python25\lib\site-packages\paste-1.7.1-py2.5.egg\paste\
registry.py, line 350, in __call__
app_iter = self.application(environ, start_response)
File c:\program
files\python25\lib\site-packages\Beaker-1.0.1-py2.5.egg\beake
r\middleware.py, line 74, in __call__
return self.app(environ, start_response)
File c:\program
files\python25\lib\site-packages\Beaker-1.0.1-py2.5.egg\beake
r\middleware.py, line 147, in __call__
return self.wrap_app(environ, session_start_response)
File c:\program
files\python25\lib\site-packages\Routes-1.9.2-py2.5.egg\route
s\middleware.py, line 100, in __call__
response = self.app(environ, start_response)
File c:\my\python\pylons\pylons\wsgiapp.py, line 112, in __call__
to 'return' it?) in: %r % controller.__name__)
Exception: No content returned by controller (Did you remember to
'return' it?)
in: 'PagePublicController'
