Mailman 3 March 2008 - Twisted-web

XMLRPC and keyword arguments
by Andrew McNabb 11 Mar '08

11 Mar '08

I've made a simple extension to XMLRPC, and I was wondering if it is something that I should contribute back to Twisted or if I should keep it to myself. In other words, would others find this useful? The idea is that RPC methods might need to get at information in the request. For example, an RPC method might need to know what IP address the request comes from or it might need to know if HTTP basic authentication is set. I'm sure I could come up with more examples. Here how it's used: class SomeXMLRPCClass(XMLRPC): def keywords(self, request): return {'client': request.client} def xmlrpc_echo(self, x, **kwds): client = kwds['client'] # [do what you need to with client here] return x Anyway, implementing this is incredibly simple, and I needed it for a project I'm working on. If it would be useful to others, I'd be happy to create a ticket and post a patch. Thanks. -- Andrew McNabb http://www.mcnabbs.org/andrew/ PGP Fingerprint: 8A17 B57C 6879 1863 DE55 8012 AB4D 6098 8826 6868

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status of Twisted Web and Web 2
by Andrew McNabb 08 Mar '08

08 Mar '08

I've been trying to understand what the current status of Twisted Web and Web 2 are. Everything I've found on Google seems to be a year or two old, so I was wondering of someone here could give a more up-to-date summary. Is Twisted Web 2 close to becoming stable? Is it an active project (most of the tickets I saw on Trac were a year or two old)? How is its support for HTTP 1.1? How complete is XMLRPC support on both client and server? Is there anything that Twisted Web is still better at than Web 2? I've written some code that uses Twisted Web, and it seemed a little basic. For example, I had to make some modifications in order to receive large files in progress instead of waiting until they were done downloading. I have a new project that would use a lot of HTTP and XMLRPC, and I was wondering if it would be safer to go with Twisted Web or Twisted Web 2. I was also wondering if there are any recent or forthcoming advancements to look forward to. Thanks. -- Andrew McNabb http://www.mcnabbs.org/andrew/ PGP Fingerprint: 8A17 B57C 6879 1863 DE55 8012 AB4D 6098 8826 6868

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static file performance
by Phil Christensen 07 Mar '08

07 Mar '08

Hi All, The previous thread about http server performance made me think of something I've been meaning to ask about for a while. What is the best way to send static files to the client in twisted.web? I know web2 had some preliminary support for mmap for small files, but I know it didn't work the last time I checked, and I'm trying to stick with twisted.web for now, anyways. I've just been using Apache to serve static content, but I'd love to be able to use a pure-twisted solution. -phil

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Re: [Twisted-web] xml library in twisted
by Raj kumar 05 Mar '08

05 Mar '08

Hi michal, Thank you for the valuable reply. I need a clarification regarding this xml from you. from your reply i got to know is, the file which i wanted is not at all any xml. Is it? Then let me tell you my problem.... My (server-client)application will get players information fromdifferent clients and the server will save this plyers information in a*.xml file. And my server will send this file to clients when ever they need it. can you suggest me how to handle this situation? Do i need an xml? what you call the following format of my file other than xml? <game> <player1> <stuff> </stuff> </player1> </game> Please suggest me what kind of xml stuff i'm using now? and any better options for me? Thank you. ----- Original Message ---- From: Michał Pasternak <michal.dtz(a)gmail.com> To: twisted-web(a)twistedmatrix.com Sent: Tuesday, 4 March, 2008 8:49:05 PM Subject: Re: [Twisted-web] xml library in twisted Dnia 2008-03-04, o godz. 19:47:17 Raj kumar <k_r_a_j_kumar(a)yahoo.co.in> napisał(a): > Hi all, > I'm dealing with xml files in a twisted application, > can any one suggest me the best xml library in twisted? > Previously i used twisted.web.microdom and twisted.web.minidom but > they don't have much of the functionalities.... Is there any other > xml library in twisted which makes it easy with lot of options? I > wanted to create a xml file like this... Are you completly sure you need XML at all? Allow me to cite http://dirtsimple.org/2004/12/python-is-not-java.html : """ XML is not the answer. It is not even the question. To paraphrase Jamie Zawinski on regular expressions, "Some people, when confronted with a problem, think "I know, I'll use XML." Now they have two problems." This is a different situation than in Java, because compared to Java code, XML is agile and flexible. Compared to Python code, XML is a boat anchor, a ball and chain. In Python, XML is something you use for interoperability, not your core functionality, because you simply don't need it for that. In Java, XML can be your savior because it lets you implement domain-specific languages and increase the flexibility of your application "without coding". In Java, avoiding coding is an advantage because coding means recompiling. But in Python, more often than not, code is easier to write than XML. And Python can process code much, much faster than your code can process XML. (Not only that, but you have to write the XML processing code, whereas Python itself is already written for you.) [...] (The only exception to this is if your target audience really really needs XML for some strange reason. Like, they refuse to learn Python and will only pay you if you use XML, or if you plan to give them a nice GUI for editing the XML, and the GUI in question is something that somebody else wrote for editing XML and you get to use it for free. There are also other, very rare, architectural reasons to need XML. Trust me, they don't apply to your app. If in doubt, explain your use case for XML to an experienced Python developer. Or, if you have a thick skin and don't mind being laughed at, try explaining to a Lisp programmer why your application needs XML!) """ -- m _______________________________________________ Twisted-web mailing list Twisted-web(a)twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-web Bollywood, fun, friendship, sports and more. You name it, we have it on http://in.promos.yahoo.com/groups

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Pharmacy Online March 70% OFF
by twisted-web＠twistedmatrix.com 05 Mar '08

05 Mar '08

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Re: xml library in twisted(need clarification)
by Phil Christensen 05 Mar '08

05 Mar '08

On Mar 5, 2008, at 12:23 AM, Raj kumar wrote: > Hi Phil, > Thank you for the valuable reply. > I need a clarification regarding this xml from you. > from your reply i got to know is, the file which i wanted is not at > all any xml. > Is it? > Then let me tell you my problem.... > My (server-client)application will get players information from > different clients and the server will save this plyers information > in a *.xml file. > And my server will send this file to clients when ever they need it. > can you suggest me how to handle this situation? > Do i need an xml? > what you call the following format of my file other than xml? > <game> > <player1> > <stuff> > </stuff> > </player1> > </game> > > and one more thing is the problem with micrdom is i'm unable to > generate a tree stucture as above...everything it saves as a child > of root like below.. > <game> > <plyer1> > <stuff> > </stuff> > </plyer1> > </game> I'm not really clear what the difference is supposed to be between those two samples. They seem to be semantically identical except for whitespace (and what I'm assuming is a typo with the plyer1 tag name). Are you trying to output the XML in a "beautified" format? As for whether XML is appropriate to use in this case, that's really up to you. It seems like you're trying to use XML as a communication protocol, which isn't particularly efficient, in the way that a F-16 is not a particularly efficient way to get to the grocery store. On the other hand, it also sounds like you control both ends of the wire. In that case, there's a myriad of other serialization protocols you might choose to transfer these attribute trees, including JSON, or Twisted's Perspective Broker. > and to read all the elements from xml file again i have to use > domhelper. Because there is no function in microdom to read all the > elements in a single loop(other than read file line by line or to > get a specific element by getElement method). I think you might want to try using getElementsByTagName(). It returns a list of matching nodes you can iterate through. > Please suggest me what kind of xml stuff i'm using now? and any > better options for me? If you're using this in the context of a Twisted app, you might as well use microdom, unless your XML starts getting complex and you need the speed of Expat or something. But again, XML is probably not your best choice here, except as an exercise. -phil

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xml library in twisted
by Raj kumar 04 Mar '08

04 Mar '08

Hi all, I'm dealing with xml files in a twisted application, can any one suggest me the best xml library in twisted? Previously i used twisted.web.microdom and twisted.web.minidom but they don't have much of the functionalities.... Is there any other xml library in twisted which makes it easy with lot of options? I wanted to create a xml file like this... <game> <player1> <stuff> </stuff> </player1> <player2> <stuff> </stuff> </player2> </game> and want to access that player stuff directly..(like a tree structure) Thank you in advance. Now you can chat without downloading messenger. Go to http://in.messenger.yahoo.com/webmessengerpromo.php

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HTTP(S) Client with authentication support
by Bruno Harbulot 03 Mar '08

03 Mar '08

Hello, I'm new to Twisted, and I'd like to know if there is any HTTP(S) Client API that would support various authentication methods and strategies. By 'strategy', I mean that, ideally, the client application could define some sort of 'strategies' to tell the client API what to reply when challenged with an HTTP 401 Unauthorized response code. I guess that's feasible using HTTP Basic authentication, but I'd also like to be able to define when to send a client certificate for authentication to an HTTPS server than wants or requires it. Could some of these goals be achieved with Twisted.Web or Twisted.Web2? I'm not sure where to find documentation on the subject. I'd appreciate any pointers or suggestions. Best wishes, Bruno.

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Divmod Nevow 0.9.31
by Tristan Seligmann 02 Mar '08

02 Mar '08

I'm pleased to announce the release of Nevow 0.9.31, available here: http://divmod.org/trac/attachment/wiki/SoftwareReleases/Nevow-0.9.31.tar.gz… Changes since the last announced release (0.9.29): 0.9.31 (2008-02-06): - Fixed Guard's request parameter save/restore feature to not clobber request state after login succeeds when a session has already been negotiated. - Added a hook to nevow.guard.SessionWrapper which allows the domain parameter of the session cookie to be specified. 0.9.30 (2008-01-16): - Change DeferredSerializer so that it passes failures from the Deferred being serialized on to the Deferred returned by the flattening function. Without this behavior, the Deferred returned by the flattening function is never fired when a Deferred which fails is serialized.

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