gmane.comp.python.cherrypy

upload json file and process it

saptah — 2012-05-19T15:53:05

Hi guys,
I'm starting a new project, and I'm using cherrypy for a backend.

One thing though, I'm trying to do an upload of a json file, and I'd like 
to process this json file 'on the fly' without needing to access the 
physical file on disk. ¿is this possible?

Thanks!!

Better way than this for client-side SSL?

Simon Haines — 2012-05-17T03:03:55

I've made a ServerAdapter that saves client-side credentials (if any) to 
the WSGI environment, but was wondering if there's a better way to set up 
the default server to use it.

Here's the code:

import cherrypy.wsgiserver
from cherrypy.wsgiserver import ssl_builtin

class ClientSSLAdapter(ssl_builtin.BuiltinSSLAdapter):
    def get_environ(self, sock):
        environ = ssl_builtin.BuiltinSSLAdapter.get_environ(self, sock)
        environ['SSL_PEER_CERTIFICATE'] = sock.getpeercert()
        return environ

cherrypy.wsgiserver.wsgiserver2.ssl_adapters['client'] = 'ClientSSLAdapter'
cherrypy.config['server.ssl_module'] = 'client'

Those last two lines are the only way I could find to have the default 
server pick up my module. The documentation says 'Just set 
server.ssl_adapter to an SSLAdapter instance' but cherrypy.server has no 
ssl_adapter attribute. Is there a more canonical way to do this without 
reaching into the wsgiserver and fiddling with its adapters? Just curious.
Simon.

Web-framework+db with the widest scalability?

Alec Taylor — 2012-05-12T08:55:26

Disclosure: I have posted this question on stackoverflow<http://stackoverflow.com/q/10562165>and 
comp.lang.python<https://groups.google.com/forum/#%21topic/comp.lang.python/gSAw5mLkUos>
.

 I am building a project requiring high performance and scalability, 
entailing:

   - Role-based authentication<http://en.wikipedia.org/wiki/Role-based_access_control>with 
   API-key<http://en.wikipedia.org/wiki/Application_programming_interface_key>licensing to access data of specific users
   - API <http://en.wikipedia.org/wiki/Application_programming_interface>exposed with 
   REST <http://en.wikipedia.org/wiki/REST> (XML<http://en.wikipedia.org/wiki/XML>, 
   JSON <http://en.wikipedia.org/wiki/JSON>), XMLRPC<http://en.wikipedia.org/wiki/XMLRPC>, 
   JSONRPC <http://en.wikipedia.org/wiki/JSONRPC> and SOAP<http://en.wikipedia.org/wiki/SOAP>
   - "Easily" configurable getters and setters<http://en.wikipedia.org/wiki/Mutator_method>to create APIs accessing the same data but with input/output in different 
   schemas <ht

doubts on cherrypy

ram_ganeshu — 2012-05-14T08:05:38

Hi...all,
   I am using cherrypy more than 2 months, now i am having strange
doubt, is it necessary we should use def index(), for our index
page....(exact name index(), we can't use other names?)?
                                     One more is i want to call
directly a html file, that is navigation from one html file to another
html file, is it possible?(i want to call a static html file, from my
another html file) instead of writing a method to call a static
file...
                        please help me to find out....Thanks in
advance.....

Latching signal handling?

Simon Haines — 2012-05-14T01:45:54

Some of my modules used as CherryPy applications spin up their own threads 
(via threading.Timer) for background processing. However, I can't find a 
way to latch cherrypy.engine.signal_handler or 
cherrypy.engine.console_control_handler to properly clean things up when 
Ctrl-C is pressed on a Linux/Windows console.

My server startup code looks like this (Python 2.7.1, CherryPy 3.1.2):

# Register of background jobs
jobs = []
def handle_terminate(event):
  for job in jobs:
    print('Terminating %s' % job.name)
    job.stop()

if hasattr(engine, 'signal_handler'):
  engine.signal_handler.set_handler('SIGTERM', handle_terminate)
  engine.signal_handler.subscribe()
if hasattr(engine, 'console_control_handler'):
  # Best guess as there is no documentation for console_control_handler
  engine.console_control_handler.set_handler('SIGTERM', handle_terminate)
  engine.console_control_handler.subscribe()

Obviously I'd like to register a listener for the Ctrl-C signal, have the 
listener clean up the background job

link data

Rita Morgan — 2012-05-11T12:08:52

Hello,

How does one get and post data in cherrypy? for example, I have a link
link.html?user=foo  now in link.html how can I handle user=foo?

An example would be much appreciated.

Using simpledb with boto

Mark — 2012-05-03T15:35:58

Anyone using Amazon's SimpleDB with boto in CherryPy?

I have to connect then get a domain:

import boto

sdb = boto.connect_sdb(...)
dom = sdb.get_domain('test_users')

Then in my page handlers I can look for a user 'shooter' with:

user2 = dom.get_item('shooter')
if user2 == None:
  print "no user shooter"


But I'm not sure where to make the connect and get_domain calls and
where to save the domain object. Can I just do:

root.py:

import boto
sdb = boto.connect_sdb(...)
dom = sdb.get_domain('test_users')

class Root:
    < at >cherrypy.expose
    def page(self, username):
        user = dom.get_item(username)
        if user != None:
            ...

Cheroot

2012-05-01T13:10:08

Hi,

I have been a CP user for a few years now and was wondering where does cheroot fit in the cherrypy ecosystem?

Cheers,

EuGeNe

Newbie IOError Port not free

Stefanie Lück — 2012-04-30T12:46:54

Hi!

I'm new to cherrypy and web frameworks in general. I wanted to try out a 
simply HelloWorld example but I'm always getting this Error:

ChannelFailures: IOError("Port 8080 not free on '127.0.0.1'",)

I tried things which I found in Internet like changing the ports but I 
didn't work.

Any suggestions?

Thanks in advance!
Stefanie

Europython 2012 - Early Bird will end in 3 days!

Palla — 2012-04-30T09:17:10

Hi All,
the end of Early Bird is on May 2nd, 23:59:59 CEST. We'd like to ask
to you to forward this post to anyone that you feel may be interested.

We have an amazing lineup of tutorials and talks. We have some
excellent keynote speakers and Guido will be with us!
[https://ep2012.europython.eu/p3/whos-coming?speaker=on#guido-van-
rossum]

If you plan to attend, you could save quite a bit on registration
fees ... but remember that early bird registration ends in 3 days!

Things to Remember:
- House your server: We will be running an Intranet at EuroPython, to
let sponsors, startups, open-source projects and speakers showcase
their products directly within our network.
- Training: You can book the trainings you want to attend, directly
from the schedule (click on the training, and then click on the "Book"
button).
- Sprints: Wonderful hacking sessions during the weekend, learn from
expert Python developers, and contribute to the Python ecosystem!
- Probably we've already discussed about the fact that Guido Va

having issue with cherrypy with mako templates and ASCII chars greater than 127

Tony Caduto — 2012-04-27T20:26:23

Hi,
I have had a cherrypy app in production for over a year and recently I have
been getting errors when someone uploads a file
with a name that contains extended ascii chars like the EM Dash etc

What happens is this error is returned when the app tries to display a grid
with the file names:

Invalid Request!
500 Internal Server Error

The server encountered an unexpected condition which prevented it from
fulfilling the request.



cherrypy version = 3.2.0

I have # -*- coding: utf-8 -*-
at the top of my code.

Is there a way to prevent this error when a file name being display has one
of these odd chars in it?

404 error, unable to load css styles and img src!

Eugene NGONTANG — 2012-04-22T20:55:56

Hi!

I'm in my first real experience with python web development. I'm
developing a third part web application with  cheetah and cherrypy.
I use cheetah Template class for templating and it works find. But
when it define my color and html attribute in a css style file, and
use the <link> balise to link my css styles, it doesn't work.
In the other hand the server does not serve image for the web page,
defined in the <img sr=> balise
Thus the page is display without themes and color.

And in the console i get 404 error from the server for these
resources.

I don't know if the error is from cheetah but i think it could be from
cherrypy since i have a 404 error, manning that the resource is not
located by the server. Even when i put the full path of my css files
and images, the same thing happen

I use precompiled chestah template Below are my linux and python
configurations, and errors got from the console :

System used :  Debian squeeze
Python version : 2.6
Cherrypy version : 3.2.2

Css file:
body {
    backgr

Trailing Slashes tool not working?

Daniel Devine — 2012-04-22T14:09:58

I cannot get the trailing_slash tool to work. I've played around with
the options and nothing seems to have any effect.
I am using CherryPy 3.2.2 and Routes 1.13. I would like to have a
trailing slash added. There is no errors in the debug output.

If I go to http://127.0.0.1:8080/blog/index/ it works, however if I go
to http://127.0.0.1:8080/blog/index it doesn't.

The two files of interest are:
The main program is: https://bitbucket.org/ddevine/icdy/src/872f3969a341/icdy.py
And the routes I am testing are in:
https://bitbucket.org/ddevine/icdy/src/872f3969a341/blog/__init__.py

Can anybody see what I am doing wrong? Is there a bug or lack of
essential documentation?

--Daniel Devine

Unittests for client code

Andrew Melo — 2012-04-19T09:43:22

Hello, everyone-

We have an application that contains both server (written in cherrypy) code
and client code that queries the server (i.e. different components on
different machines communicate over REST), but our unittest harness is a)
somewhat flaky (transient connection errors) b) somewhat innacurate because
cherrypy is running in the same process as the client code (though in a
different thread).

Does someone have an example for robustly starting/stopping a cherrypy
server in a separate process and doing the proper synchronization to keep
the client from attempting to connect before the server has finished
acquiring the socket and starting up?

I saw the code in the cherrypy test tree, but it appears it starts the
server in the same process.

Thanks,
Andrew

subprocess and cherrypy

Rita Morgan — 2012-04-15T12:08:48

Hi,

My web application involves many subprocesses to get data back to the
website. I was wondering, if there was a best practices guide or even
better some examples on how to handle this use case?

running cherryd

Rita Morgan — 2012-04-13T11:33:01

Hello,

Planning to deploy my app and I was wondering, should I use

cherryd -i cpapp -c prod.conf

to deploy my application or the conventional python capp.py ? I
personally like, cherryd, but was wondering if that was ok.

This is to serve about 50 users.

standalone cherrypy

Rita Morgan — 2012-04-12T11:19:11

Hi,

I would like to deploy a web application for my team. There will be
about 50 users using it. Would a standalone cherrpy server be
sufficient or should I go with mod_wsgi with cherrypy?

problem combining streaming and content-type

Robert Bjornson — 2012-03-28T20:22:19

Hi all,

I'm trying to use response.stream to stream a large gzip file.  I'd
also like to set 'Content-Type' to 'application/z-gzip' so that the
browser (Chrome) automatically
opens the file chooser and loads the data into a file.  I can
successfully do one or the other, but when I do both, the content-type
isn't transmitted in the header.
Here is simplified code that has this behavior (using cherrypy
3.1.2).  Note that I've simplified the generator to only return one
chunk for this example; of course in the actual case I'd read the
entire file.

    < at >cherrypy.expose
    def getfile2(self, *rest):

        cherrypy.response.headers['Content-Type']='application/x-gzip'

        path='/'.join(rest)
        buf =
open(path).read(10000)
        yield buf

    getfile2._cp_config = {'response.stream': True}

If I remove the line setting response.stream to True, and turn the
yield into return, the content type is correctly placed in the header
and I am prompted to save the file.  As is, the header returned to the

Unintended/undocumented incompatibility btw cp3.2 and cp3.3 with form values?

Ralph Heinkel — 2012-04-03T09:12:53

Hi,
we have been using cherrypy for many years now (and we are really happy 
users...), just the latest new version gives us some headaches with 
upgrading to it.

The reason for this is that variables contained in the URL of a page are 
now added to the content of a posted form if variables with the same name 
exist.
Example:

URL: my.host/page?myvalue=4

The form returned would look like:
<html>
  <form action="" method="POST">
    <input type="hidden" name="myvalue" value="5" />
    ...
  </form>
</html>

After submitting, with cp3.2 the resulting cherrypy.request.params 
dictionary would only contain the value of the hidden field for 'myvalue', 
i.e. being {'myvalue': '5'}
Now in cp3.3 the value from the URL would be added to it, so we receive{'myvalue': ['4', '5']}.
Note: Since "action" is empty the same URL would be used for the POST 
request. But this has always been the case.

Is this change in behavior intended? Can it be suppressed?

Any help would be appreciated.

Thanks,

Ralph

timeout issues

Radim — 2012-03-27T20:37:33

Firstly, thanks for the great package!

When using cherrypy, I'd appreciate help with the following behaviour:

I have a long, blocking call (several hours). The call completes
normally (no error), but upon exiting, I see the following in the log:

2012-03-27 20:53:48,547 : INFO : _cplogging:280 : access(CP Server
Thread-7) : 127.0.0.1 - - [27/Mar/2012:20:53:48] "POST /indexize HTTP/
1.1" 200 14 "" "python-requests/0.10.8"
[27/Mar/2012:20:53:48]  Traceback (most recent call last):
  File ".../lib/python2.7/site-packages/cherrypy/_cpwsgi.py", line
169, in trap
    return func(*args, **kwargs)
  File ".../lib/python2.7/site-packages/cherrypy/_cpwsgi.py", line 96,
in __call__
    return self.nextapp(environ, start_response)
  File ".../lib/python2.7/site-packages/cherrypy/_cpwsgi.py", line
379, in tail
    return self.response_class(environ, start_response, self.cpapp)
  File ".../lib/python2.7/site-packages/cherrypy/_cpwsgi.py", line
222, in __init__
    self.run()
  File ".../lib/python2.7/site-packages/cherr

CherryPy Recipes

Sylvain Hellegouarch — 2012-03-19T18:16:22

Hi folks,

I've started adding more recipes to the CherryPy Recipes Mercurial
repository I'm holding on BitBucket.

https://bitbucket.org/Lawouach/cherrypy-recipes

It's fare from covering all aspects of CherryPy but hopefully will help
some of you. Recipes are based on CherryPy 3.2.2 but should work down to 3.1