Mailman 3 August 2002 - Twisted

[Twisted-Python] Help us release Twisted 1.0
by Itamar Shtull-Trauring 23 Aug '02

23 Aug '02

Hi all, We're trying to get 1.0 out the door. How can you help? 1. Write docs, tests, examples. Help get rid of remaining deprecation warnings in tests. 2. Have you submitted a patch for twisted.internet that hasn't made it in? Email it to me directly. And pester Glyph and Allen about finishing up the bug tracking system. 3. Help with the public relations - have you used Twisted in your company? If so we'd love to get quotes from you about what you did and how great it is. You know who you are :) Thanks!

7 9

[Twisted-Python] [Fwd: Adelux quote]
by Itamar Shtull-Trauring 22 Aug '02

22 Aug '02

Date: Thu, 22 Aug 2002 13:37:00 +0200 Reply-To: lstep (a) adequat.net Organization: Adelux ========================================== Adelux develops custom internet applications such as portals, network security tools, communication-related programs, and software that leverages other systems. We discovered Twisted 10 months ago, and now it is a key element of our development strategy. We have successfully used Twisted on several projects, of very different problem domains. We developped a highly scalable realtime application for customer support, which serves web-based clients as well as clients implemented in any of the many protocols supported by Twisted. Twisted was also used to develop targeted proxies for various applications supporting more than 15.000 users. Twisted handles the charge with no problem. We intend to continue using Twisted on upcoming projects, especially since integrated support for databases and new services are being added very quickly. We found Twisted to be powerful, comprehensible, well documented, and backed by a good helpful community. We'll use it on our next products for sure! Luc Stepniewski, Head Engineer <lstep(a)adequat.net> Adelux, France ===============================

1 0

[Twisted-Python] Bug adding SSL web server through coil
by Alex Levy 22 Aug '02

22 Aug '02

Hi, all -- I've hit a bug while playing around with coil. I made an out-of-the-box web.tap ('mktap web --path static') and ran coil ('coil web.tap'), went to http://localhost:9080/config/ports/ssl and tried to add an 'HTML Web Server' on port 8888. I got the following error: exceptions.TypeError: listenSSL() takes at least 4 arguments (3 given) The traceback is attached. -- Alex Levy Tel: 617.835.0778 WWW: http://mesozoic.geecs.org "Power corrupts. Absolute power is kind of neat." - John Lehman, Secretary of the Navy, 1981-1987

2 1

[Twisted-Python] t.e.rows and serial
by Benjamin Bruheim 20 Aug '02

20 Aug '02

Hello, I've started to examine t.e.rows to see if it fits me. But at the moments it's just an ugly collection of tests. But still I think my problems are actual: Its currently based on the rows-examples that come with twisted. There is a single problem I have. If I try to use the type serial, so that the id for the stuff I put into the db is autoincremented, I get the DBError, "Type serial no known". All examples I've encountered elsewhere increments the id manually, but I do not gain anything on doing that. Are there any generic methods for solving this, or are there any helpers out there? Second, what's this "catch all exceptions"-thing I've encountered? I must print out the exceptions manually, even though I thought these were thrown into the deferredexceptionchain/as a Failure. Any ideas? Thanks, Benjamin Bruheim

1 0

[Twisted-Python] fdport
by Moshe Zadka 20 Aug '02

20 Aug '02

import socket from twisted.internet import tcp, abstract from twisted.python import log class FDPort(tcp.Port): port = "dummy" def __init__(self, fd, factory, backlog=None, reactor=None): """Initialize with a numeric port to listen on. """ abstract.FileDescriptor.__init__(self, reactor=reactor) self.fd = fd self.factory = factory if backlog: self.backlog = backlog def __getstate__(self): """(internal) get my state for persistence """ dct = copy.copy(self.__dict__) try: del dct['socket'] except: pass return dct def startListening(self): """Create and bind my socket, and begin listening on it. This is called on unserialization, and must be called after creating a server to begin listening on the specified port. """ log.msg("%s startings"% self.factory.__class__) self.factory.doStart() skt = socket.fromfd(self.fd, socket.AF_INET,socket.SOCK_STREAM) skt.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1) skt.setblocking(0) skt.listen(self.backlog) self.connected = 1 self.socket = skt self.numberAccepts = 100 self.fileno = skt.fileno self.startReading()

1 0

[Twisted-Python] Event I/O for Java
by Zooko 19 Aug '02

19 Aug '02

Itamar suggested that I mail this list announcing EIO -- an Event-based Input/Output package for Java. http://zooko.com/eio The design of the EIO package should look familiar to Twisted hackers -- it uses the handy concepts of callbacks, non-blocking IO, and a task scheduler. If someone wanted to write a reactor for the Twisted Java code, EIO might be a good place to start. One limitation is that it currently requires Java >= 1.4. Regards, Zooko

1 0

[Twisted-Python] ANN: Twisted 0.99.0
by Christopher Armstrong 19 Aug '02

19 Aug '02

Twisted is an event-based framework for internet applications, written in Python and licensed under the LGPL. For more information, visit: http://www.twistedmatrix.com Join the mailing list at: http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python Our IRC channel is #twisted on irc.openprojects.net. What's New in 0.99.0 ==================== - Paul Shwartz contributed Twisted Conch, an SSHv2 implementation. - Twisted Zoot, an implementation of Gnutella for Twisted, was written by Bryce "zooko" Wilcox-O'Hearn. - Rewritten connection APIs to make writing clients with Twisted easier. - A "Pager" for Twisted Spread allowing one to easily stream large amounts of data with Perspective Broker. - A new FreeBSD Kqueue reactor (mainloop implementation) contributed by Matt Campbell. - Refactored Authorizers and Application so twisted.internet has no dependance on twisted.cred. - Many API cleanups, tons of bugfixes, and more documentation as usual. What is Twisted? ================ Twisted is an event-based framework for internet applications. It includes a web server, a telnet server, a chat server, a news server, a generic client and server for remote object access, and APIs for creating new protocols and services. Twisted supports integration of the Tk, GTK+, Qt or wxPython event loop with its main event loop. The Win32 event loop is also supported, as is basic support for running servers on top of Jython. Twisted supports TCP, SSL, UDP, Unix sockets and subprocesses out of the box. Twisted currently supports the following protocols, all implemented in pure python, most of them as both servers and clients: - FTP - HTTP - NNTP - SOCKSv4 (server only) - SMTP - IRC - telnet - POP3 - AOL's instant messaging TOC - OSCAR, used by AOL-IM as well as ICQ (client only) - DNS - MouseMan - finger - Echo, discard, chargen and friends - Twisted Perspective Broker -- Chris Armstrong << radix(a)twistedmatrix.com >> http://twistedmatrix.com/users/radix.twistd/

1 0

[Twisted-Python] twisted/protocols/http.py stringToDatetime
by Lee Harr 17 Aug '02

17 Aug '02

Hi; I am new to the list, and to Twisted. I was playing with the twisted webserver and found a bug that seems to come up when accessing web pages using an old version of netscape. I am using: Netscape Navigator 4.08 FreeBSD 4.5-RELEASE Twisted 0.19 (from FreeBSD ports) The error would occur when trying to reload a page which had been changed, and seems to be caused by the way the date is being sent from the browser to the server. I am able to work around the problem, by just using a pre-set date if there is a problem parsing that date, as this patch shows: *** http.py.1 Sat Aug 17 12:44:45 2002 --- http.py Sat Aug 17 12:45:39 2002 *************** *** 204,214 **** def stringToDatetime(dateString): """Convert an HTTP date string to seconds since epoch.""" ! parts = string.split(dateString, ' ') ! day = int(parts[1]) ! month = int(monthname.index(parts[2])) ! year = int(parts[3]) ! hour, min, sec = map(int, string.split(parts[4], ':')) return int(timegm(year, month, day, hour, min, sec)) def toChunk(data): --- 204,217 ---- def stringToDatetime(dateString): """Convert an HTTP date string to seconds since epoch.""" ! try: ! parts = string.split(dateString, ' ') ! day = int(parts[1]) ! month = int(monthname.index(parts[2])) ! year = int(parts[3]) ! hour, min, sec = map(int, string.split(parts[4], ':')) ! except: ! day, month, year, hour, min, sec = 1, 1, 1970, 1, 1, 1 return int(timegm(year, month, day, hour, min, sec)) def toChunk(data): Lee Harr missive(a)hotmail.com _________________________________________________________________ Send and receive Hotmail on your mobile device: http://mobile.msn.com

1 0

[Twisted-Python] Deprecation consternation
by Steve Waterbury 17 Aug '02

17 Aug '02

I understand that the way the authorizer machinery is assembled into twisted seems to be morphing (and not completely propagated into other twisted components yet, hence all the deprecation messages when running the unit tests), and I was trying to see if I could do things properly (the new way) in my code -- but not successfully yet, I guess, because when running this (shamelessly purloined and modified from the pgquoter.py example): from twisted.spread import pb from pdmengine import BasePdmEngine class PdmClient(pb.Perspective): def perspective_getProductsByProject(self): return self.service.BasePdmEngine.getProductsByProject(project) class PdmPBService(pb.Service): def __init__(self, engine, serviceName, authorizer, application=None): pb.Service.__init__(self, serviceName, authorizer, application) perspectiveClass = PdmClient --- ... with mktap I still get: /home/waterbug/sandbox/TwistedPlugins/TwistedPdm/pdmpb.py:10: DeprecationWarning: You have to pass an authorizer separately from an application now. pb.Service.__init__(self, serviceName, authorizer, application) /usr/local/lib/python2.2/site-packages/twisted/cred/service.py:72: DeprecationWarning: Application.authorizer attribute is deprecated, use Service.authorizer instead authorizer = sp.authorizer /usr/local/lib/python2.2/site-packages/twisted/spread/pb.py:972: DeprecationWarning: Application.authorizer attribute is deprecated, use Service.authorizer instead auth = auth.authorizer Saving pgpdm application to pgpdm.tap... Saved. --- I understand the second 2 warnings, which are internal to twisted, but I'm puzzled by the first one, which refers to this line: pb.Service.__init__(self, serviceName, authorizer, application) ^^^^^^^^^^ I thought I _was_ passing an authorizer separately! Suggestions? What should the syntax be under the new authorizer regime? tnx! -- Steve. Stephen C. Waterbury http://misspiggy.gsfc.nasa.gov/people/waterbug.html

2 1

[Twisted-Python] Question about pbquote example
by Steve Waterbury 14 Aug '02

14 Aug '02

Glyph, First, thanks for extending the TwistedQuotes example with pbquote.py and quotetap2.py -- very helpful! Question: in pbquote.py, the QuoteReader's method is named perspective_nextQuote(), which returns the result of the quoter's getQuote() ... so I'm guessing you named the perspective method that way (instead of perspective_getQuote(), e.g.) to emphasize that the result one perspective gets from a service is not necessarily the same as the result another perspective would get, since it could be affected by the perspective's identity, states, etc. -- independently of the fact that, in this particular case, the results are random anyway (a somewhat impertinent artifact of the quoter example ;^)? -- Steve. Stephen C. Waterbury http://misspiggy.gsfc.nasa.gov/people/waterbug.html

2 1