Mailman 3 December 2003 - Twisted

[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz 06 Aug '21

06 Aug '21

hi there, folks: I'd really like to release 0.7.0 but I would like it to be at least a little bit tested before I do so. Could those of you with CVS trees check everything out and see if it performs as advertised? Deeper bugs than that will have to wait for the next release, but I'd at least like to know if it works for someone other than me. Thanks. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |_____| |_____ | | | | @ t w i s t e d m a t r i x . c o m http://www.twistedmatrix.com/~glyph/

4 5

[Twisted-Python] flash's rtmp protocol
by Douglas Bagnall 10 Jan '04

10 Jan '04

RTMP is a secret protocol used by Macromedia flash servers to do fancy interactive/streaming stuff. I found a reference to it on one of Bob Ippolito's TODO lists: http://pythonmac.org/wiki/BobIppolito "TODO: [....] Reverse engineer proprietary RTMP protocol (Flash Communication Server) and implement Python version (Twisted)" I'm also interested in doing this, but am unlikely to start soon. So this is just to let you (Bob) know, lest we do too much in parallel. douglas

8 23

[Twisted-Python] XML Parsing Error in tutorial.xhtml
by a.vredegoor＠hccnet.nl 08 Jan '04

08 Jan '04

After a fresh install of twisted 1.1.1 and clicking on the manual entry and next on the * Tutorial: Twisted From Scratch link in the Twisted Documentation file I get the following error in mozilla: ### XML Parsing Error: duplicate attribute Location: file:///D:/Python23/Lib/site-packages/TwistedDocs/howto/tutorial.xhtml Line Number 506, Column 60:<a class="py-listing" href="listings/finger/finger/tap.py" class="py-listing">finger/tap.py</a> -----------------------------------------------------------^ ### possible fix: Change line 506 to 510 into: ### <a href="listings/finger/finger/tap.py" class="py-listing">finger/tap.py</a> <p>And register it all:</p> <a href="listings/finger/finger/plugins.tml" class="py-listing">finger/plugins.tml</a> ### Anton

2 3

[Twisted-Python] Twisted Weekly News #10
by Luc Stepniewski 07 Jan '04

07 Jan '04

==================================================================== Twisted Weekly News #10 ==================================================================== .. contents:: There wasn't too much mail this week, so I merged the previous TWN with the current, as I was ill last week. If you have any new information, ideas, announcements for the next TWN, please write to me, <lior(a)gradstein.info>. TWN is also available as HTML formated ReST on http://gradstein.info/articles/ twisted_news/twisted_news/twn10 The Twisted Weekly News ------------------------- 9&10th Issue. Sunday, December 28, 2003 QOTW:: http://twistedmatrix.com/pipermail/twisted-python/2003-December/006789.html From a mail by Alan McIntyre: "I just wanted to thank the Twisted developers for making such a cool piece of software. [...] Thanks to Twisted and Python, I was able to start from scratch and put together a server to present some of this data via XML-RPC in about 2 or 3 hours (and that includes looking up a lot of stuff in the documentation)." Discussions ------------- * http://twistedmatrix.com/pipermail/ twisted-python/2003-December/006786.html Jonathan Simms asked for help on his new (new) ftp server code which is currently in sandbox. He asks for help to resolve some problems with authentication on the Windows side. * http://twistedmatrix.com/pipermail/ twisted-python/2003-December/006828.html More and more people are becoming interested in integrating Twisted stuff into their projects. Last week, RodrigB asked about The Circle. This week, Valentino Volonghi asks about the possibility (wish) to replace the pygame event loop with a Twisted reactor. * http://twistedmatrix.com/pipermail/ twisted-python/2003-December/006820.html Michal Pasternak made some tests on Twisted, and noticed some performance degradation after 40 simultaneous connections. Itamar replied there wasn't anything hardcoded that would change Twisted behaviour above 40 simultaneous connections. Cool Thing of the Week ----------------------- * **Treasure of code examples and tutorials for nevow** (http:// www.livejournal.com/users/fzzzy/) fzZzy updated his new blog on LiveJournal with a lot of code samples he wrote for people who asked questions on irc. The second lecture he gave on irc is also available (http://soundfarmer.com/content/logs/ NevowLecture2-121503.txt). With these docs and the previous more "in-depth" documentation from justinj (http://stewstuff.com/doc/nevow.xhtml) you do not any excuse for not learning nevow! * **SFTP support in Zope (using Twisted!)** (http://twistedmatrix.com/ pipermail/twisted-python/2003-December/006839.html) Fred L. Drake, Jr. wrote some support (http://cvs.zope.org/Packages/ SFTPGateway/) for the sftp protocol to be included in Zope. The result may be available as a separate product in a near future. * **Impacket** (http://oss.corest.com/projects/impacket.html) Not related to Twisted, but interesting anyway.Itamar recommended us to take a look at this python library which provides low-level programmatic access to network packets (tcp, udp, etc.). There is also a python pcap implementation on their web site. * **Reminder about the web forum** (http://twisted.banquise.org/) May I remind you that a web interface exists for those that prefer reading informations online? We're barely 8 now, but nobody posts anything which can be discussed :-( Current releases ----------------- * Twisted: 1.1.1 (released 2003-12-10) * Quotient: 0.8.8 (released 2003-12-12) * Twisted Java: 0.6.1 Ok, that's it for this week. Thanks for reading!

6 7

[Twisted-Python] SSL Client Certificate support
by Martin Waite 01 Jan '04

01 Jan '04

Hi, Does twisted support SSL Client certificates ? I can't see anywhere to plug the certificate into in the SSL ClientContextFactory. regards, Martin

3 3

[Twisted-Python] Subversion
by Itamar Shtull-Trauring 01 Jan '04

01 Jan '04

Currently in beta. Atomic commits, real support for renames, folders, etc.. Can do both anon and logged in access without apache (ssh and pserver style). Has emacs mode. Has windows clients (e.g. TortoiseSVN, VS.NET integration). Has cvs importer. viewcvs supports it. I say we switch when it hits 1.0. -- Itamar Shtull-Trauring http://itamarst.org Looking for a job: http://itamarst.org/resume.html

3 2

[Twisted-Python] Re: [Twisted-commits] log stderr and non-zero exit code in CGIs, don't show info to users as it is a security risk (closes issue #241)
by Glyph Lefkowitz 01 Jan '04

01 Jan '04

On Thursday, August 28, 2003, at 10:32 AM, itamarst CVS wrote: > log stderr and non-zero exit code in CGIs, don't show info to users as > it is a security risk (closes issue #241) We shouldn't swallow errors in these situations. If it's a security risk, provide a way for the server administrator to turn it off, but this is a _bad_ default. If you doubt the wisdom of making this default, please consult any number of Perl FAQs of the form: Q. "I wrote a CGI and it works perfectly, but now I moved it to another server and I get nothing but a "500 Internal Server Error" page. How do I tell what went wrong!?!?!?" A. Look in your apache logs. --- Q. "I looked at my apache logs and nothing makes sense! How do I tell what the error was??!" A. ... Also, could you clarify the security risk of displaying stderr from CGI scripts? I've never heard of a CGI that puts security-critical information on stderr rather than stdout and makes it a risk to display to users.

2 4

[Twisted-Python] Recovering PB references on broken connection?
by David Bolen 30 Dec '03

30 Dec '03

I've been experimenting with the perspective broker in Twisted 1.1.0 and am wondering? Is there any graceful way to reconnect and continue to use PB references if you temporarily lose a connection due to a network outage? For example, I can envision my application as being a client that connects to a remote application server, and while running may have any number of PB references to that remote application server in various data structures in the client. Should there be a transient network outage such that the TCP session to the server is interrupted, I'd like to be able to reconnect without having to flush all such data in the client. I'm still experimenting, but the docs and some early tests would seem to imply that if the TCP link breaks for any reason then any of my object references can never be used again. Is that in fact true and/or is there any way to avoid such a condition? I was hoping that I could catch network errors in some manner such that I could try to re-establish the PB link, and then permit existing references from the prior connection to continue to function could severely impact a client (or certainly impose a potentially large effort to restore any remote state to newly viable references). What do other perspective broker applications do about being as robust as possible in the presence of transient network conditions? Thanks for any info/suggestions. -- David

3 2

[Twisted-Python] Unjellying per broker vs. global jelly.unjellyableRegistry
by Ralf Schmitt 29 Dec '03

29 Dec '03

Hi, I have attached a patch, which makes it possible to unjelly different classes depending on the broker they were sent through (basically one can set a brokers 'unjellyableRegistry' attribute, which then get's used instead of the global one). Has such a feature already been planned? Any chance of getting it included? - Ralf =================================================================== RCS file: /cvs/Twisted/twisted/spread/jelly.py,v retrieving revision 1.48 diff -u -u -r1.48 jelly.py --- twisted/spread/jelly.py 4 Jun 2003 00:18:03 -0000 1.48 +++ twisted/spread/jelly.py 24 Dec 2003 01:36:31 -0000 @@ -495,13 +495,22 @@ class _Unjellier: - def __init__(self, taster, persistentLoad, invoker): + unjellyableRegistry = unjellyableRegistry + unjellyableFactoryRegistry = unjellyableFactoryRegistry + + def __init__(self, taster, persistentLoad, invoker, + unjellyableRegistry=None, unjellyableFactoryRegistry=None): self.taster = taster self.persistentLoad = persistentLoad self.references = {} self.postCallbacks = [] self.invoker = invoker + if unjellyableRegistry is not None: + self.unjellyableRegistry = unjellyableRegistry + if unjellyableFactoryRegistry is not None: + self.unjellyableFactoryRegistry = unjellyableFactoryRegistry + def unjellyFull(self, obj): o = self.unjelly(obj) for m in self.postCallbacks: @@ -514,7 +523,7 @@ jelType = obj[0] if not self.taster.isTypeAllowed(jelType): raise InsecureJelly(jelType) - regClass = unjellyableRegistry.get(jelType) + regClass = self.unjellyableRegistry.get(jelType) if regClass is not None: if isinstance(regClass, ClassType): inst = _Dummy() # XXX chomp, chomp @@ -526,7 +535,7 @@ if hasattr(val, 'postUnjelly'): self.postCallbacks.append(inst.postUnjelly) return val - regFactory = unjellyableFactoryRegistry.get(jelType) + regFactory = self.unjellyableFactoryRegistry.get(jelType) if regFactory is not None: state = self.unjelly(obj[1]) inst = regFactory(state) @@ -845,7 +854,9 @@ return _Jellier(taster, persistentStore, invoker).jelly(object) -def unjelly(sexp, taster = DummySecurityOptions(), persistentLoad=None, invoker=None): +def unjelly(sexp, taster = DummySecurityOptions(), persistentLoad=None, invoker=None, + unjellyableRegistry=None, unjellyableFactoryRegistry=None): + """Unserialize from s-expression. Takes an list that was the result from a call to jelly() and unserializes @@ -853,4 +864,4 @@ of SecurityOptions, will cause an InsecureJelly exception to be raised if a disallowed type, module, or class attempted to unserialize. """ - return _Unjellier(taster, persistentLoad, invoker).unjellyFull(sexp) + return _Unjellier(taster, persistentLoad, invoker, unjellyableRegistry, unjellyableFactoryRegistry).unjellyFull(sexp) Index: twisted/spread/pb.py =================================================================== RCS file: /cvs/Twisted/twisted/spread/pb.py,v retrieving revision 1.154 diff -u -u -r1.154 pb.py --- twisted/spread/pb.py 17 Oct 2003 19:06:23 -0000 1.154 +++ twisted/spread/pb.py 24 Dec 2003 01:36:33 -0000 @@ -500,6 +500,8 @@ version = 6 username = None factory = None + unjellyableRegistry = None + unjellyableFactoryRegistry = None def __init__(self, isClient=1, security=globalSecurity): banana.Banana.__init__(self, isClient) @@ -826,7 +828,7 @@ self.unserializingPerspective = perspective try: - return unjelly(sexp, self.security, None, self) + return unjelly(sexp, self.security, None, self, self.unjellyableRegistry, self.unjellyableFactoryRegistry) finally: self.unserializingPerspective = None -- brainbot technologies ag boppstrasse 64 . 55118 mainz . germany fon +49 6131 211639-1 . fax +49 6131 211639-2 http://brainbot.com/ mailto:ralf@brainbot.com

2 3

[Twisted-Python] .tac filenames configurations
by RITA Y/O RODRIGO DIAZ Y/O BENENSON 28 Dec '03

28 Dec '03

Is there a way to indicate in the .tac file which .log and .pid filenames the .tap file will generate ? If not, should not this feature be aviable ? Happy new year for the Twisted minds... RodrigoB.

2 1

Twisted December 2003