PyQt by example (Session 2) in spanish!
Thanks to Nicolás Pace, session 2 is now available in spanish.
If anyone wants to translate these things to other languages, please, go ahead and contact me!
Thanks to Nicolás Pace, session 2 is now available in spanish.
If anyone wants to translate these things to other languages, please, go ahead and contact me!
This is how you add basic authentication to your Juno app:
init({ 'middleware':[('paste.auth.basic.AuthBasicHandler', {'realm':'Admin', 'authfunc':valid_user})], })
Where valid_user is the obvious function that takes user/pass and returns true/false.
Not exactly a sophisticated role-based auth, but I don't need that for my app (LDAP's access controls take care of it).
I am currently in dire need of creating a nice admin page for a LDAP addressbook, which should do some slightly unusual things with the data (like manipulating Postfix's virtual table).
So, what the heck, let's also learn something new while I'm at it. The victims: Pyjamas and Juno.
Pyjamas is sort of a Python version of GWT and is bliss. Finally I can code HTML and JS in python ;-)
And Juno is refreshingly simple. Since the whole frontend is done by Pyjamas, all I needed is a way to route JSONRPC calls to python code and operate in the backend.
So, here are two useful snippets:
# This decorator decodes JSONRPC arguments as sent by Pyjamas to # Juno, and calls the target function with the decoded version. def JSONRemote(target): def wrapper(web,*args,**kwargs): postdata=web.input().keys()[0] data = json.loads(postdata) id, method, params = data["id"],data["method"],[web,]+data["params"][1] kwargs['method']=method return target(*params,**kwargs) return wrapper
Using this, any plain juno method works as a JSONRPC method!
For example:
@route('/user') @JSONRemote def list(web,startwith='*',method=None): try: result=search(filter='(&(uid=*@bigclient.ar)(sn=%s*))'%startwith) resp=JSONResponse(result) except ldap.LDAPError, e: resp=JSONResponse(None,e.desc) return resp
See? No JSON decoding. And no encoding either, because I am creating the response using this:
# This class creates a correct JSON response from Juno as required by Pyjamas class JSONResponse(JunoResponse): def __init__(self,result=None,error=None,id=None,code=200): JunoResponse.__init__(self) self.headers['Content-Type']='text/javascript' self.append(json.dumps({'result':result,'error':error,'id':id,'code':code}))
This is probably not a great implementation but it's good enough for me right now.
The spanish translations of most sessions of "PyQt by Example" are almost done, thanks to several volunteers.
Tomorrow I will upload at least one.
If anyone wants to translate them to other languages, I will be happy to include those too.
I am finally publishing my LatinoWare 2008 tutorial, in revised and expanded form. It will probably be a 10-part series, and here is session 5.
This session does heavy designer work, including promoted widgets, custom slots, and much more.
See also: