Mailman 3 October 2006 - Twisted

[Twisted-Python] twisted.cred question
by Yi Qiang 27 Oct '06

27 Oct '06

Hi, I am using twisted.cred to provide authentication to users over PB. I am using the FilePasswordDB class to provide avatarID's to users. I am wondering where/how I should implement the feature so that when a user tries to login with a username that does not exist yet, we create a username/password pair for that user and log them in. I looked around in checkers.py, but I am not sure if that is the right place to implement this. Thanks in advance, Yi

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[Twisted-Python] setting perspective arg to getStateToCacheAndObserveFor
by Marvin McNett 24 Oct '06

24 Oct '06

How does one go about setting the perspective parameter to twisted.spread.flavors.Cacheable.getStateToCacheAndObserveFor method? I'd like to return different information based on what type of observer is subscribing. I've looked over and tested the example in the documentation, but it's always None. I also looked over the source, but it's not obvious to me. Thanks, -Marvin

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RE: [Twisted-Python] udp broadcast question
by Gaspard, Bradley S 24 Oct '06

24 Oct '06

It does work when I specify the broadcast address of my wireless interface. I am still curious if one can specify on which interface to broadcast to 255.255.255.255 ... perhaps not a twisted question. -----Original Message----- From: twisted-python-bounces(a)twistedmatrix.com on behalf of Gaspard, Bradley S Sent: Tue 10/24/2006 4:27 PM To: twisted-python(a)twistedmatrix.com Subject: [Twisted-Python] udp broadcast question I found a udp broadcast example (below) which works fine for my wired ethernet interface but I would like to be able to specify my wireless interface (ath0) for the udp broadcast. How can this be done? On Wednesday, Dec 17, 2003, at 17:27 Europe/Helsinki, Jp Calderone wrote: > > No threads, but maybe it's good enough anyway: Thanks for trying to help. But really this is very incomplete, missing all read or write calls to the socket. And I've tried, with just that SO_BROADCAST option I do not receive the stuff I send, and in fact with just that option, I can't even send. But thanks for the pointer to twisted. Torsten > import sys > from socket import SOL_SOCKET, SO_BROADCAST > > from twisted.internet import reactor > from twisted.internet import protocol > from twisted.internet import task > from twisted.python import log > > log.startLogging(sys.stdout) > > port = 7154 > > class BroadcastingDatagramProtocol(protocol.DatagramProtocol): > > port = port > > def startProtocol(self): > self.transport.socket.setsockopt(SOL_SOCKET, SO_BROADCAST, > True) > self.call = task.LoopingCall(self.tick) > self.dcall = self.call.start(1.0) > > def stopProtocol(self): > self.call.stop() > > def tick(self): > self.transport.write(self.getPacket(), ("<broadcast>", > self.port)) > > def getPacket(self): > return "Some bytes for you" > > def datagramReceived(self, data, addr): > print "Received", repr(data) > > reactor.listenUDP(port, BroadcastingDatagramProtocol()) > reactor.run() > > Jp > > -- > http://mail.python.org/mailman/listinfo/python-list _______________________________________________ Twisted-Python mailing list Twisted-Python(a)twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python

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[Twisted-Python] udp broadcast question
by Gaspard, Bradley S 24 Oct '06

24 Oct '06

I found a udp broadcast example (below) which works fine for my wired ethernet interface but I would like to be able to specify my wireless interface (ath0) for the udp broadcast. How can this be done? On Wednesday, Dec 17, 2003, at 17:27 Europe/Helsinki, Jp Calderone wrote: > > No threads, but maybe it's good enough anyway: Thanks for trying to help. But really this is very incomplete, missing all read or write calls to the socket. And I've tried, with just that SO_BROADCAST option I do not receive the stuff I send, and in fact with just that option, I can't even send. But thanks for the pointer to twisted. Torsten > import sys > from socket import SOL_SOCKET, SO_BROADCAST > > from twisted.internet import reactor > from twisted.internet import protocol > from twisted.internet import task > from twisted.python import log > > log.startLogging(sys.stdout) > > port = 7154 > > class BroadcastingDatagramProtocol(protocol.DatagramProtocol): > > port = port > > def startProtocol(self): > self.transport.socket.setsockopt(SOL_SOCKET, SO_BROADCAST, > True) > self.call = task.LoopingCall(self.tick) > self.dcall = self.call.start(1.0) > > def stopProtocol(self): > self.call.stop() > > def tick(self): > self.transport.write(self.getPacket(), ("<broadcast>", > self.port)) > > def getPacket(self): > return "Some bytes for you" > > def datagramReceived(self, data, addr): > print "Received", repr(data) > > reactor.listenUDP(port, BroadcastingDatagramProtocol()) > reactor.run() > > Jp > > -- > http://mail.python.org/mailman/listinfo/python-list

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[Twisted-Python] keeping client data in sync with Twisted, mirroring some Axiom Items on the client-side
by Robert Gravina 24 Oct '06

24 Oct '06

Divmod and Twisted lists, I think I've asked something similar before on the Divmod list, but I'd like to ask again for some advice about using Divmod Axiom (an object-relational DB) in a multi-user Twisted GUI application I'm writing. This has as much to do with Twisted as it does Axiom, so I felt it best to send to both lists. I apologise for the noise. The problem I'm having is mainly architectural. I have about 15 Axiom Item classes that live on a server-side database, and these are Twisted pb.Copyable, so the clients end up with a pb.RemoteCopy which has all of the attributes from the server-side Item. I now have about 1000 lines of code for the pb.Copyable Axiom Items and 500 lines of code for all these pb.RemoteCopy objects, but essentially all they are classes with the same attribute names as the Axiom Items. Apart from being a pain to maintain, it feels like this is really wasted code. There's also a lot of code to notify other clients when data in these objects changes. Basically, my app is starting to feel really bloated, and I think I'm going about this the wrong way. Someone mentioned earlier that what I really want is Zope Enterprise Objects, and they are right. A distributed database that's simple keep all clients in sync is exactly what I want, but now that I've invested so much time and energy into Twisted I'd hate to throw it all away and begin the long arduous task of learning and switching to Zope. My basic goals are this: 1) Have a database which several clients can share and modify. For example, if this is a contacts database, and I update someone's phone number, I want all the other clients to get the new number. Perhaps this can be implemented using pb.Cacheables? I already do something like this using one Cacheable which I send pb.Copyable objects to it's client-side RemoteCache as they are modified, and it updates a dict of objects indexed by storeID.... but my implementation is far from elegant :) 2) I'd like clients to be able to possibly one day "work offline". Say for example they don't have network access, they could, instead of logging in to the server, use their local cache of contacts. add/ edit/delete then and then have these changes reflected when they next logon. I assume this would probably take some effort to implement regardless of whether I used Twisted or ZEO, but my main stumbling block at the moment is that I can't send Axiom Items down the wire, since they have a Store reference and storeID etc. What I would really like to do is send Axiom Items to clients and have them create an Axiom Item *with the same storeID and details* as the one they received. Sort of like mirroring the data, but not necessarily the whole DB, just the objects they require. I'm starting to wonder now if I should replace Twisted with ZEO in my application. The main reason I didn't go with ZEO in the beginning is I couldn't find any examples of it being used for mutli-user GUI database-apps, only for mirroring/scaling Zope instances, so figured it wasn't designed with this in mind. I do like Twisted, and I'm very happy with it as a framework, I'm just struggling with how to deal with this problem. Thanks again all, Robert

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[Twisted-Python] Raja Fashions, Quality Mens Fashions
by Over Stock 24 Oct '06

24 Oct '06

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[Twisted-Python] knowing which reactor is running
by Manlio Perillo 23 Oct '06

23 Oct '06

In a test suite I need to know if the win32eventreactor is running. Any solution? Thanks and regards Manlio Perillo

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[Twisted-Python] Problems with code in "Twisted" book ...
by Walsh, Sandy 23 Oct '06

23 Oct '06

Hey there, Just got a copy of "Twisted" and I've been playing around with the book examples. Can't seem to get the "Example 2-6. dataforward.py" to work on Windows. I've reverted back to Python 2.3 (because I ultimately want to use the secure stuff later). It compiles and runs, but I get no echo of the input and the reactor seems to be frozen. When I Ctrl-C the program I get my keyed input spewed into the console, so it seems python is not receiving it. Is there a place I can check for the latest code from the book or is there a more suitable place to ask questions of this type? Thx, Sandy

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[Twisted-Python] Re: [Twisted-commits] r18506 - Fix SSL check.
by Jean-Paul Calderone 23 Oct '06

23 Oct '06

On Mon, 23 Oct 2006 09:51:25 -0600, Ralph Meijer <ralphm(a)wolfwood.twistedmatrix.com> wrote: >Author: ralphm >Date: Mon Oct 23 09:51:25 2006 >New Revision: 18506 > >Modified: > trunk/twisted/words/protocols/jabber/xmlstream.py > trunk/twisted/words/test/test_jabberxmlstream.py >Log: >Fix SSL check. > >Author: ralphm >Reviewer: exarkun >Fixes 2171 > This changeset contains some changes which were made after the review but never checked into the development branch. This makes tracking down the exact set of changes more challenging, since the branch diff does not end up representing the actual trunk change. This makes a difference if, for example, the change needs to be reverted. The person doing the revert may not realize the trunk commit represented additional changes and they could be lost. For future branch merges, make sure that the trunk commit includes only the changes from the branch. Jean-Paul

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com 22 Oct '06

22 Oct '06

Bug summary ______________________ Summary for 2006-10-15 through 2006-10-22 Bugs opened: 12 Bugs closed: 6 Total open bugs: 749 (+6) |== Type Changes |== Priority Changes |== Component Changes |Defect: +3 |Highest: +2 |Core: +6 |Enhancement: +5 |High: +1 |Ftp: +1 |Task: +1 |Normal: +6 |Names: +1 |Trial: +1 |Words: +0 New / Reopened Bugs ______________________ ===== Highest ===== [#1953] Epoll reactor (opened by therve) enhancement core http://twistedmatrix.com/trac/ticket/1953 [#1953] Epoll reactor (opened by therve) enhancement core http://twistedmatrix.com/trac/ticket/1953 [#815 ] t.internet.process.Process should check for valid arguments (opened by marienz) enhancement core http://twistedmatrix.com/trac/ticket/815 ===== High ===== [#2173] twisted/trial/runner.py:243: exceptions.DeprecationWarning: log.startKeepingErrors is deprecated since Twisted 2.5 (opened by exarkun) defect trial http://twistedmatrix.com/trac/ticket/2173 [#2175] twisted.plugin.getCache doesn't handle WindowsError ERROR_FILE_NOT_FOUND (opened by exarkun) (CLOSED, duplicate) defect core http://twistedmatrix.com/trac/ticket/2175 ===== Normal ===== [#2174] Error in the PullProducer doc (opened by misto) defect core http://twistedmatrix.com/trac/ticket/2174 [#2176] Need IFilePath (opened by wsanchez) enhancement core http://twistedmatrix.com/trac/ticket/2176 [#2177] Collect Jabber interfaces in one file (opened by ralphm) task words http://twistedmatrix.com/trac/ticket/2177 [#2178] Generalize XMPP subprotocol containment (opened by ralphm) enhancement words http://twistedmatrix.com/trac/ticket/2178 [#2179] Parameterize the root directory of the FTP server for non-anonymous logins (opened by cwegrzyn) enhancement ftp http://twistedmatrix.com/trac/ticket/2179 [#2180] FilesystemLock needs a method that defers until it can acquire a lock (opened by wsanchez) enhancement core http://twistedmatrix.com/trac/ticket/2180 [#2181] twisted.names.client.getHostByName and friends insufficently documented. (opened by jerub) defect names http://twistedmatrix.com/trac/ticket/2181 Closed Bugs ______________________ ===== Highest ===== [#1953] Epoll reactor (opened by therve, closed by exarkun, ) enhancement core http://twistedmatrix.com/trac/ticket/1953 [#1953] Epoll reactor (opened by therve, closed by exarkun, ) enhancement core http://twistedmatrix.com/trac/ticket/1953 [#1995] Rework t.w.p.jabber.component to work with initializers. (opened by ralphm, closed by ralphm, fixed) enhancement words http://twistedmatrix.com/trac/ticket/1995 [#815 ] t.internet.process.Process should check for valid arguments (opened by marienz, closed by exarkun, ) enhancement core http://twistedmatrix.com/trac/ticket/815 ===== High ===== [#2175] twisted.plugin.getCache doesn't handle WindowsError ERROR_FILE_NOT_FOUND (opened by exarkun, closed by exarkun, duplicate) defect core http://twistedmatrix.com/trac/ticket/2175 ===== Normal ===== [#2088] twisted.words.im.basechat.ChatUI.contactChangedNick is completely broken. (opened by jerub, closed by exarkun, duplicate) enhancement words http://twistedmatrix.com/trac/ticket/2088

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