xmlhttprequest + json + pylons
Hi
JSONRequest = {
post: function( url, data, callback, timeout ) {
xhr = new XMLHttpRequest();
xhr.open(POST, url, true);
xhr.setRequestHeader( Content-Type, application/x-www-form-
urlencoded );
if (callback) {
xhr.onreadystatechange = function() {
if( xhr.readyState==4 ) {
//alert( xhr.responseText );
callback( xhr.responseText );
}
}
}
if ( data ) {
xhr.send( data );
} else {
xhr.send( null );
}
},
get: function(url, callback) {
alert( 'in JSONRequest.get();' );
}
};
using above code(js) I send the
data(login={username:python,password:pylons) to pylons.
... pylons controller...
print request.params.keys()
print request.params.items()
print request.params.values()
I am getting flowing output...
['login']
[('login', u'{username:python, password:
[u'{username:python, password:pylons}']
How can I get the username password value ?
Thanks
Madhu Alagu
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WSGIController.__call__ and error handling
Hello,
I want to write a generic error handler which will display meaningful page
to the user in case some particular error occurs.
I have tried to override WSGIController.__call__ using the following code
but it doesn't work:
try:
return WSGIController.__call__(self, environ, start_response)
except model.SQLError, e:
c.message = e
c.code = 500
return render('/custom_error.html')
When executed it simply prints a traceback to stderr:
File
/usr/lib/python2.5/site-packages/Paste-1.4-py2.5.egg/paste/httpserver.py,
line 287, in wsgi_execute
self.wsgi_start_response)
File
/usr/lib/python2.5/site-packages/Paste-1.4-py2.5.egg/paste/translogger.py,
line 67, in __call__
return self.application(environ, replacement_start_response)
File
/usr/lib/python2.5/site-packages/Paste-1.4-py2.5.egg/paste/debug/prints.py,
line 98, in __call__
environ, self.app)
File /usr/lib/python2.5/site-packages/Paste-1.4-py2.5.egg/paste/wsgilib.py,
line 540, in intercept_output
if data[0] is None:
IndexError: list index out of range
How do I do this properly?
--
Max Ischenko
http://www.developers.org.ua/ -- Ukrainian software developers community
http://maxischenko.in.ua/ -- my blog (Russian)
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Re: Having pylons.render() to return Unicode
Philip Jenvey [EMAIL PROTECTED] writes: Most if not all Buffet plugins (I'm not sure about Genshi or breve's) are pretty much hardcoded to only return raw strings. Unfortunately this is just how it's always been done with Buffet. I had APIs developed by people who never use Unicode. It would have been just at easy to return Unicode. Ok, I'll do the re-decoding by hand. -- Yannick Gingras --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
AutoConnectHub and doInTransaction bug
I know that pylons.database is about to be deprecated, but I've run across a bug (Im using 0.9.6.1). I'm posting this as a heads up for anyone else that may run into this. (I've also posted something in the pylons trac http://pylonshq.com/project/pylonshq/ticket/327) If you: 1) use the AutoConnectHub in pylons.database 2) use AutoConnectHub's inherited `doInTransaction` method 3) do not set processConnection on the AutoConnectHub instance 4) do not `connect` to the database via getConnection then, doInTransaction will blow up. doInTransaction blows up, looking for a threadingLocal.connection, which does not exist yet because getConnection has not been called on the hub. The code below illustrates this. (Change pathing of the database_uri variable!) First, run the code with --create-table as the command line argument. That creates the table. Next, run the script again with the --do-in-transaction command line argument. This should blow up. ## BEGIN TEST CODE from pylons.database import AutoConnectHub import sys import sqlobject # Setup the database connection. database_uri = 'sqlite:/c|/tmp/sqlite.dat' __connection__ = AutoConnectHub(database_uri) class User(sqlobject.SQLObject): name = sqlobject.StringCol() def main(): if '--create-table' in sys.argv: User.createTable() return 0 if '--do-in-transaction' in sys.argv: print __connection__.doInTransaction(func_for_xaction) return 0 return 0 def func_for_xaction(): print User(name = 'func for xaction') if __name__ == __main__: sys.exit(main()) ## END TEST CODE The quick fix for me was to derive from AutoConnectHub (well, really PackageHub for me) and override doInTransaction - class MyAutoConnectHub(AutoConnectHub): def doInTransaction(self, func, *args, **kw): if not hasattr(self.threadingLocal, connection): self.getConnection() return AutoConnectHub.doInTransaction(self, func, *args, **kw) Hope this helps someone... jw --~--~-~--~~~---~--~~ 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: About paste traceback emails
Yannick Gingras wrote: I have two questions regarding the backtrace emails that paste sends: 1) how do you disable them? Don't set the email address in your configuration. 2) how do you send them without unwinding the stack? You have to hook into what errormiddleware calls, paste.exceptions.errormiddleware.handle_exception. It would be nice if there was something in the environment that was hooked into the configuration, but there isn't now, so you'll have to provide all the many arguments to that function. -- Ian Bicking : [EMAIL PROTECTED] : http://blog.ianbicking.org --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
Classic URL Style
Hi! I'm trying to port an existing mod_python app to Pylons, but had some trouble with Routes. I'd like to keep using URLs the same classic URL style: http://localhost/location/edit?location_id=123 And then have Pylons receive it as arguments for the controller method: code class LocationController(BaseController): def edit(self, location_id): return 'Editing %s' % location_id /code But I'm getting this exception: TypeError: edit() takes exactly 2 arguments (1 given) Do you have any directions on what do I need to do to make it work? -- Humberto Diógenes --~--~-~--~~~---~--~~ 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: Classic URL Style
Humberto Diógenes wrote:
Hi!
I'm trying to port an existing mod_python app to Pylons, but had
some trouble with Routes. I'd like to keep using URLs the same
classic URL style:
http://localhost/location/edit?location_id=123
And then have Pylons receive it as arguments for the controller
method:
code
class LocationController(BaseController):
def edit(self, location_id):
return 'Editing %s' % location_id
/code
But I'm getting this exception:
TypeError: edit() takes exactly 2 arguments (1 given)
Do you have any directions on what do I need to do to make it work?
Yes, pull location_id from the request GET parameters:
employment_id = request.GET.get('employment_id')
Alberto
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Re: Classic URL Style
On Nov 6, 5:56 pm, Jonathan LaCour [EMAIL PROTECTED] wrote: This past weekend, I participated in a sprint on Pylons where we implemented two new controllers: DecoratedController and ObjectDispatchController. Both of these controllers perform parameter injection. Here is an example of a DecoratedController: from pylons.controllers import DecoratedController from pylons.decorators import expose class TestController(DecoratedController): @expose() def testing(self, name): return 'Hello, %s' % name This is all very new, so it probably has some bugs, but please do give it a try, and we'll do our best to fix any bugs you find! That's great! :) I pulled the latest version from the repository but couldn't use it. ### Existing project: URL: http://localhost:5000/location/index File '/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/ site-packages/Pylons-0.9.7dev_20071106-py2.4.egg/pylons/error.py', line 245 in respond app_iter = self.application(environ, detect_start_response) File '/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/ site-packages/Pylons-0.9.7dev_20071106-py2.4.egg/pylons/wsgiapp.py', line 95 in __call__ controller = self.resolve(environ, start_response) File '/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/ site-packages/Pylons-0.9.7dev_20071106-py2.4.egg/pylons/wsgiapp.py', line 173 in resolve match = environ['wsgiorg.routing_args'][1] KeyError: 'wsgiorg.routing_args' ### New project: $ paster create -t pylons PylonsTest2 [...] OSError: [Errno 2] No such file or directory: '/Library/Frameworks/ Python.framework/Versions/2.4/lib/python2.4/site-packages/ Pylons-0.9.7dev_20071106-py2.4.egg/pylons/templates/default_project' $ ls -l /Library/Frameworks/Python.framework/Versions/2.4/lib/ python2.4/site-packages/Pylons-0.9.7dev_20071106-py2.4.egg/pylons/ templates/ -rwxr-xr-x 1 root admin0 Nov 6 19:02 __init__.py -rwxr-xr-x 1 root admin 221 Nov 6 19:02 __init__.pyc I hope I'm not doing anything wrong. :P -- Humberto Diógenes http://humberto.digi.com.br --~--~-~--~~~---~--~~ 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: Classic URL Style
Thanks for the correction Mike Jose Mike Orr wrote: On 11/6/07, Jose Galvez [EMAIL PROTECTED] wrote: you could add for k,v in request.params: locals()[k] = v to the top f your functions this would inject the variable names into your functions do you could use them directly. You can't modify local variables via locals(). Local variables are implemented as an array with the names converted to subscripts at compile time. The only exception is if the function contains an 'eval', which is slow and insecure (if the arg is untrusted). ===x1,py=== def test(): locals()[k] = v print k if __name__ == __main__: test() === $ python /tmp/x.py Traceback (most recent call last): File /tmp/x.py, line 5, in module if __name__ == __main__: test() File /tmp/x.py, line 3, in test print k NameError: global name 'k' is not defined If you put k = 2 before the locals() call, it will print 2. I don't know what security risks this will bring up A user might override one of your variables like 'filename_to_delete'. --~--~-~--~~~---~--~~ 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: Classic URL Style
On 11/6/07, Jose Galvez [EMAIL PROTECTED] wrote: you could add for k,v in request.params: locals()[k] = v to the top f your functions this would inject the variable names into your functions do you could use them directly. You can't modify local variables via locals(). Local variables are implemented as an array with the names converted to subscripts at compile time. The only exception is if the function contains an 'eval', which is slow and insecure (if the arg is untrusted). ===x1,py=== def test(): locals()[k] = v print k if __name__ == __main__: test() === $ python /tmp/x.py Traceback (most recent call last): File /tmp/x.py, line 5, in module if __name__ == __main__: test() File /tmp/x.py, line 3, in test print k NameError: global name 'k' is not defined If you put k = 2 before the locals() call, it will print 2. I don't know what security risks this will bring up A user might override one of your variables like 'filename_to_delete'. -- Mike Orr [EMAIL PROTECTED] --~--~-~--~~~---~--~~ 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: Classic URL Style
Mike Orr wrote: The dictionary you return in the controller method will be used as the namespace for your template. Are 'c' and the other Pylons variables implicitly added? As of right now, they are not. You will have to return them as part of the dictionary that is sent to your template. -- Jonathan LaCour http://cleverdevil.org --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
Temporary mailing list to send multiple emails
Hi list. This is not Pylons-specific but I think a sort of ensamble point of view is needed, and since I'm working with the framework and strongly agree with its principles, here it is. I want to email thousands recipients from my application; in despite of ease I need the user to send the message using her mail agent to benefit from custom signature, external archiviation, Exchange backing, ... At the moment the application pops up several mailto requests, one every 50 recipients - this is due to some limit in the number of addresses handled by agents (or in the length of urls?), but this doesn't scale up as the number of addresses grows. So I had the enlightenment: creating a mailing list with needed addresses, emailing the list from the client agent, then trashing the list. I fell on GNU Mailman that seems to integrate neatly with Postfix and has ad-hoc command line interface. Now the questions: did I blow up my mind? May it worth the effort? Did you ever need something like that? Maybe I'm missing a simpler gear to accomplish this, for instance I have no clue on how to detect whether a message has been delivered by Mailmain, so that I'm free to clear the list. --~--~-~--~~~---~--~~ 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: Classic URL Style
On 11/6/07, Jonathan LaCour [EMAIL PROTECTED] wrote: The dictionary you return in the controller method will be used as the namespace for your template. Are 'c' and the other Pylons variables implicitly added? -- Mike Orr [EMAIL PROTECTED] --~--~-~--~~~---~--~~ 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: Classic URL Style
On 11/6/07, Humberto Diógenes [EMAIL PROTECTED] wrote: I pulled the latest version from the repository but couldn't use it. ### Existing project: URL: http://localhost:5000/location/index File '/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/ site-packages/Pylons-0.9.7dev_20071106-py2.4.egg/pylons/error.py', line 245 in respond app_iter = self.application(environ, detect_start_response) File '/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/ site-packages/Pylons-0.9.7dev_20071106-py2.4.egg/pylons/wsgiapp.py', line 95 in __call__ controller = self.resolve(environ, start_response) File '/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/ site-packages/Pylons-0.9.7dev_20071106-py2.4.egg/pylons/wsgiapp.py', line 173 in resolve match = environ['wsgiorg.routing_args'][1] KeyError: 'wsgiorg.routing_args' This is going to be a recurring problem with Pylons-dev. When upgrading an app from Pylons 0.9.6 to 0.9.7, you have to add three lines to middleware.py: # CUSTOM MIDDLEWARE HERE (filtered by error handling middlewares) # Routing/Session/Cache Middleware app = RoutesMiddleware(app, config['routes.map']) app = SessionMiddleware(app, config) app = CacheMiddleware(app, config) Downgrading, you have to remove these lines, because Pylons 0.9.6 activates them implicitly. ### New project: $ paster create -t pylons PylonsTest2 [...] OSError: [Errno 2] No such file or directory: '/Library/Frameworks/ Python.framework/Versions/2.4/lib/python2.4/site-packages/ Pylons-0.9.7dev_20071106-py2.4.egg/pylons/templates/default_project' $ ls -l /Library/Frameworks/Python.framework/Versions/2.4/lib/ python2.4/site-packages/Pylons-0.9.7dev_20071106-py2.4.egg/pylons/ templates/ -rwxr-xr-x 1 root admin0 Nov 6 19:02 __init__.py -rwxr-xr-x 1 root admin 221 Nov 6 19:02 __init__.pyc It works for me, both with my existing dev snapshot (d3c5b6893348) and after hg pull -u (a7756badfe81). Maybe you got an incomplete update? $ ls -l ~/mercurial/Pylons/pylons/templates total 20 -rw-r--r-- 1 mso mso 281 2007-10-22 12:36 controller.py_tmpl drwxr-xr-x 5 mso mso 4096 2007-10-22 12:36 default_project -rw-r--r-- 1 mso mso0 2007-10-22 12:36 __init__.py drwxr-xr-x 4 mso mso 4096 2007-10-22 12:36 minimal_project -rw-r--r-- 1 mso mso 2085 2007-10-22 12:36 restcontroller.py_tmpl -rw-r--r-- 1 mso mso 200 2007-10-22 12:36 test_controller.py_tmpl -- Mike Orr [EMAIL PROTECTED] --~--~-~--~~~---~--~~ 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: Classic URL Style
On 06/11/2007, at 20:22, Mike Orr wrote: On 11/6/07, Humberto Diógenes [EMAIL PROTECTED] wrote: ### Existing project: URL: http://localhost:5000/location/index [...] KeyError: 'wsgiorg.routing_args' This is going to be a recurring problem with Pylons-dev. When upgrading an app from Pylons 0.9.6 to 0.9.7, you have to add three lines to middleware.py: [...] Downgrading, you have to remove these lines, because Pylons 0.9.6 activates them implicitly. Thanks! It worked. Here goes the code with the right imports: # CUSTOM MIDDLEWARE HERE (filtered by error handling middlewares) # Routing/Session/Cache Middleware (0.9.7 only, remove for 0.9.6) from routes.middleware import RoutesMiddleware from beaker.middleware import SessionMiddleware, CacheMiddleware app = RoutesMiddleware(app, config['routes.map']) app = SessionMiddleware(app, config) app = CacheMiddleware(app, config) ### New project: $ paster create -t pylons PylonsTest2 [...] OSError: [Errno 2] No such file or directory: '/Library/Frameworks/ Python.framework/Versions/2.4/lib/python2.4/site-packages/ Pylons-0.9.7dev_20071106-py2.4.egg/pylons/templates/default_project' It works for me (...) Maybe you got an incomplete update? No, the update was OK, the files are in the checkout. I copied them manually to Python site-packages and it worked. I think there's something wrong with the install scripts. When I ran easy_install . again, the templates were gone from site-packages. Anyway, the new expose() decorator worked! Thanks!!! (although it took a little to notice that BaseController was changed to DecoratedController :-) -- Humberto Diógenes http://humberto.digi.com.br --~--~-~--~~~---~--~~ 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: Classic URL Style
On Nov 6, 2007 4:19 PM, Humberto Diógenes [EMAIL PROTECTED] wrote: I think there's something wrong with the install scripts. When I ran easy_install . again, the templates were gone from site-packages. is it possible to easy_install a development version in Mercurial? I used python setup.py develop -- Mike Orr [EMAIL PROTECTED] --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
db update notifier for pylons app
Hi, I am fairly new to pylons and have what may be a simple implementation question. I have an html table which displays the (partial) contents of a database, and I would like to dynamically, and parsimoniously update this table each time an entry is added to the database. The first, simplest, crudest solution that came to mind was implementing an html refresh option directly in the html for the template. This is not very nice. The second solution that comes to mind is to use javascript and a periodic xmlhttprequest to update the table every n seconds. This is preferable to the first solution but it doesn't really get at my real problem, which is how to achive immediate notification upon a state change in the database. In order to duplicate the effect I have to call the xmlhttprequest every second, which is quite wasteful. I'm using mysql to store my data, and I know mysql supports a TRIGGER function, and I wonder if there might be some way to use this and a javascript connection that returns only upon timeout or a db state change? Or maybe that makes no sense at all? I would prefer not to require the client to install anything on his machine. If anyone has any ideas about what is or is not possible any help is welcome. thanks! --~--~-~--~~~---~--~~ 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: db update notifier for pylons app
Also, I am using sqlalchemy with pylons. kettle wrote: Hi, I am fairly new to pylons and have what may be a simple implementation question. I have an html table which displays the (partial) contents of a database, and I would like to dynamically, and parsimoniously update this table each time an entry is added to the database. The first, simplest, crudest solution that came to mind was implementing an html refresh option directly in the html for the template. This is not very nice. The second solution that comes to mind is to use javascript and a periodic xmlhttprequest to update the table every n seconds. This is preferable to the first solution but it doesn't really get at my real problem, which is how to achive immediate notification upon a state change in the database. In order to duplicate the effect I have to call the xmlhttprequest every second, which is quite wasteful. I'm using mysql to store my data, and I know mysql supports a TRIGGER function, and I wonder if there might be some way to use this and a javascript connection that returns only upon timeout or a db state change? Or maybe that makes no sense at all? I would prefer not to require the client to install anything on his machine. If anyone has any ideas about what is or is not possible any help is welcome. thanks! --~--~-~--~~~---~--~~ 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 -~--~~~~--~~--~--~---
