Mailman 3 March 2002 - Twisted

[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz Aug. 5, 2021

Aug. 5, 2021

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. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |… [View More]

4 5

[Twisted-Python] [patch] mktap web --resource
by Sune Kirkeby Aug. 12, 2002

Aug. 12, 2002

Hi, all! Attached is a short patch to add a --resource option to "mktap web", here is the --help for it: -r, --resource= <class> is the name (including module) of a subclass of twisted.web.resource.Resource to publish. So you can have any subclass of t.w.r.Resource be the 'root' of your web-server. I have also been working on a few other things: - an async Pytho-only PostgreSQL interface (not t.e.adbapi compatible, since I am not usre I like it's interface … [View More]

8 13

[Twisted-Python] We now have a coil command-line app in CVS
by Itamar Shtull-Trauring April 2, 2002

April 2, 2002

Now you can configure your TAP files through the web! Usage: coil [--new=<application name>] <tap file> Options: -n, --new= -p, --port= [default: 9080] For example, to configure a TAP generated by mktap: $ mktap web $ coil web.tap (now point browser at http://localhost:9080) Or to create a new TAP: $ coil --new=myapp new.tap (now point browser at http://localhost:9080)

3 8

[Twisted-Python] More coil TODOs
by Itamar Shtull-Trauring April 1, 2002

April 1, 2002

== Make ports visible == Currently, tcp/udp/ssl are treated as collections of protocol factories. I am going to change this to collections of Ports, so that you can configure interfaces to listen on, context factories for SSL, etc. The protocol factory will just be another attribute. This should have no effect on people who are coiling their apps. == Make old TAPs work == The refactor broke old taps - they can no longer be loaded since they refer to non-existence classes in twisted.… [View More]

2 2

[Twisted-Python] New Member
by Joan Torres April 1, 2002

April 1, 2002

Hi, My name is Joan Torres, I'm working in Port of Barcelona (spain), and I'm interested in learning more about how to use Twisted. I've two Python applications running on a Unix platform, both applications return a file as a result, and I want to write a server for them. The server should do the following things: - Execute Application1 every 10 minutes - Run Aplication1 on demand. - Keep the last file returned by application 1 - Execute Aplication2 on demand. There would … [View More]

2 1

[Twisted-Python] CVS broken?
by Itamar Shtull-Trauring March 31, 2002

March 31, 2002

Each time I checkin a file, the CVS process then gets stuck (if I check-in two files it gets stuck after the first). I'm not sure why -- perhaps this is relevant (as pointed out by Tv): http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=102292 Or perhaps it's some other issue.

1 0

[Twisted-Python] Twisted bug -- bad interaction with popen
by Itamar Shtull-Trauring March 31, 2002

March 31, 2002

This bug needs an answer from someone with unix expertise: <http://www.twistedmatrix.com/users/itamarst.twistd/bugs/view_bug?bug_id=8> I suggest getting rid of SIGCHLD handler, and having t.i.process.Process instances keep track of the pid of their process, and pass it to reapProcess so it only waitpid()s on a specific pid, and not all of them. I will add a test case which will test for this bug.

1 1

[Twisted-Python] Coil refactor more or less done
by Itamar Shtull-Trauring March 30, 2002

March 30, 2002

Hi, Background: COIL is a configuration system for Twisted, allowing you to manage and configure your server via the web, developed by glyph. To test it out: $ mktap coil $ twistd -n -f coil.tap And point your browser at http://localhost:9080 In CVS, the coil system has been refactored, and now resides in twisted.coil. I feel that at this point it is now usable for configuring real apps. Real world use will help us find missing requirements and find issues and bugs. Examples of how to … [View More]

4 8

[Twisted-Python] MSN client code preview
by Ivo van der Wijk March 30, 2002

March 30, 2002

Hi all, I did some heavy refactoring on my python MSN code this weekend. If anyone is interested in taking a sneak preview at the code (and comment on the API, etc), feel free to download some code at: http://ivo.freezope.org/pymsn200203250.tgz There's no docs (except for an msn protocol description), but there are two sample programs included: 'client.py' which is a very simple gtk/glade interface, and 'msntxttest.py' which basically echoes back anything that's sent to the client. The … [View More]

2 2

[Twisted-Python] Re: [Twisted-commits] Better collection support for coil.
by Glyph Lefkowitz March 30, 2002

March 30, 2002

On Mon, 2002-03-25 at 05:34, itamarst CVS wrote: > If a configurable class is not collection, coil's web interface will > check if the Configurator class is a collection, allowing us to have > Configurators that act as collections. > A remaining issue is twisted.web.vhost, and other similar cases, where > both the Configurator and the configurable class should really be > collections. IMHO, the way this should work is: check the Configurator first. It is the authority on … [View More]

2 1

[Twisted-Python] Coil command-line app
by Itamar Shtull-Trauring March 27, 2002

March 27, 2002

Hi all, I will soon be writing a coil command line app. It will let you edit an exisiting .tap. Ports it creates will not be activated, and its own webserver won't show up in the config interface since it will be configuring a different Application insatnce. This will very likely replace "mktap coil" for most uses. It'll working something like this: $ coil exisiting.tap (config an existing tap) $ coil -n "email-server" email.tap (create a new application instance and store it in tap) … [View More]

1 0

[Twisted-Python] Anonymous CVS pserver access
by Christopher Armstrong March 25, 2002

March 25, 2002

Today I added an "anon" user to the pserver running on zaibach, allowing anonymous users to check out the CVS Twisted code. The commands: cvs -d:pserver:anon@twistedmatrix.com:/cvs login You can just hit <enter> when you get the password prompt, then: cvs -d:pserver:anon@twistedmatrix.com:/cvs co Twisted You should then have the Twisted code in the "Twisted" subdirectory. I added a "CVS Access" page to the website at http://twistedmatrix.com/developer/cvs, if anyone wants to write up … [View More]

2 1

[Twisted-Python] Aaargh
by Itamar Shtull-Trauring March 20, 2002

March 20, 2002

""" The Win32 event mechanism (e.g. WaitForMultipleObjects()) can only wait on 64 event objects at a time. """ Same as select(). so we may need to use multiple threads for the win32 event loop.

1 0

[Twisted-Python] win32 process problem
by Drew Whitehouse March 20, 2002

March 20, 2002

Hi Itamar, I'm just getting into twisted, after our IRC chat the other day. Looks like it does everything I need (plus a lot more !). I'm having some trouble with Process and win32, i.e. I'm already using bleeding edge CVS versions ... I'm trying to run a http server which services XMLRPC calls. The XMLRPC calls then have to launch a process that the server needs to keep track of, getting notified when the process exits. Anyhow it seems the new win32 process stuff is giving trouble. It only … [View More]

2 1

[Twisted-Python] New scripts
by j.her＠t-online.de March 19, 2002

March 19, 2002

Hi! mktap is now fully moved to twisted.scripts. Would be nice if people moved the commands they use the most, or are related to the part they developed. What to do: 1. Copy the code of the command to twisted/scripts/command.py. Then first commit it unchanged, so there is a clear history! 1. Move as much code as possible into a function named run(); try to avoid top-level code if you can, since that is a problem for doc-tools, pychecker, etc. 2. Replace the command in bin/command by its … [View More]

1 0

[Twisted-Python] mktap seems to work
by j.her＠t-online.de March 18, 2002

March 18, 2002

[...\python22]Scripts\mktap.bat --help web Usage: mktap web [options] Options: --personal Instead of generating a webserver, generate a ResourcePublisher which listens on ~/.twistd-web-service ... Ciao, Jürgen

1 0

[Twisted-Python] cvs script failure
by j.her＠t-online.de March 18, 2002

March 18, 2002

Hi! On a second look, this seems to be caused by CVS using my local settings. Still, shouldn't the CVS scripts take care to use a special, well-known system path to "their" Twisted? Ciao, Jürgen

1 0

[Twisted-Python] cvs scripts failure
by j.her＠t-online.de March 18, 2002

March 18, 2002

some checkin script fails: WARNING: Python C API version mismatch for module cBanana: This Python has API version 1010, module cBanana has version 1009. <__main__.MyOptions instance at 0x8209f34> Traceback (most recent call last): File "loginfo.py", line 161, in ? config.parseOptions() File "/home/jh/lib/python/twisted/python/usage.py", line 119, in parseOptions for long, short in flags: Directory /cvs/Twisted/twisted/scripts added to the repository ValueError: unpack tuple … [View More]

1 0

[Twisted-Python] Some Win32 comments
by Tyler W. Wilson March 18, 2002

March 18, 2002

I was trying to get the Twisted IM client running, and have a few comments related to config issues on Win32. Here they are: 1 running 'python setup.py install' copies the twisted folder to the <python>\lib\site-packages folder, which is okay. but if you change to the Twisted<version> folder and do 'python bin\im', it will be using the sources from the original location, NOT the site-packages location. 2 similar to the above, if you set PYTHONPATH to point to Twisted<… [View More]

7 9

[Twisted-Python] We now have a bug tracker
by Itamar Shtull-Trauring March 18, 2002

March 18, 2002

http://twistedmatrix.com/users/itamarst.twistd/bugs/ It's using twisted.bugs, which is of course still a work in progress, but it's good enough to add bugs to. Please submit all and any bugs, feature wishes and so on.

2 2

[Twisted-Python] This seems too good to be true... :-)
by Nils R Grotnes March 18, 2002

March 18, 2002

Hi! I know I probably should lurk-a-lot-first, so please just tell me to shut up if I'm somehow out of line here... I like to state up front that I'm fresh, fresh and fresh. I switched to Debian just recently, I have just read my first Python book, and I didn't know this place existed until a week ago. The latter is what I wonder about in the Subject. How come it was so hard to find you? I have lurked quite a lot on comp.lang.python and c.l.p.announce, and I have surfed around on a lot of … [View More]

2 3

[Twisted-Python] "3D Game Using Twisted?", or: "Ach du lieber..."
by Derek Simkowiak March 15, 2002

March 15, 2002

Hello. My name is Derek Simkowiak, I've just been introduced to Twisted by Sean Riley (sean at twistedmatrix dot com). I'm using (and now contributing to) his PyUI widget set for my 3D game engine. When I told him I still needed to write the networking code, he pointed me here. I wanted to introduce myself, ask for some general guidance about a network protocol, and point out that the documentation titled "The Basics" at http://twistedmatrix.com/page.epy/docs/basics.html results in "no … [View More]such page", which really sucks for somebody just getting started (like me). First, a little bit about my game engine, because it's the type of thing you twisted Twisted people might be interested in: o OpenGL for rendering o SDL for event management o Quake2 BSP map rendering (many more model formats to come soon) - includes almost all of the Id BSP culling tricks - includes fully-functional collision detection using the Q2 "bloated planes" algorithm, as figured out by Kekoa Proudfoot o Complete in-game GUI over the top of the 3D world, including transulency, using the PyUI widget set. Screenshot at: http://www.realloc.net/~dereks/targa_pyui1.jpg Also see the older shots at: http://www.realloc.net/~dereks/commputers/my_code/targa/ Also, the big piece that you may like: I've recently refactored the whole damn thing, and with a little help from SWIG my "engine" is now nothing more than some Python C extensions. My "main event loop" is just a simple Python script, and because all the [bottlenecking] rendering code is still C, I get the ~70 FPS I was getting when the entire engine was pure C. But now I have Python at my disposal, mua ha ha. (Also, note that all the libraries are cross-platform. I'm developing under Linux, but eventually this thing should run under MS-Windows, Mac OS X, AmigaOS, and even PlayStation2.) The big pieces I have left are the enemy A.I. and the networking code. This is a client-server engine. The light at the end of the tunnel is load-balanced Linux cluster (using LVS) serving up a persistent, 3D world (ala' PlanetSide), and maybe even me making some $$$ from a few hundred subscribers paying $5/month. Now you see where Twisted fits in -- I'm basically shooting for twisted.reality in real-time 3D. My concern is regarding bandwidth. My game protocol will be similar to the Quake2 protocol, meaning huge lists of 'entities' are updated with position and orientation data as often as possible. Such generic position updates will be done with UDP, and 'critical' packets (such as damage, explosions, jumps, messages, etc.) will be done with TCP. In summary, every single byte of network overhead matters -- nay, every BIT matters (npi). So I've browsed through the API docs, but I don't have any context to know what I'm looking at. I'll be downloading and installing the source soon, but in the meantime... any advice? Is there any particular package I should be looking at (other than twisted.internet)? Does Twisted's networking code cater to somebody who needs to, for example, do bitshifting and compression to absolutely minimize the bandwidth requirements? What approach would you take? Note that, using PyUI for the GUI and [possibly] Twisted for the server, I want to have things like in-game "IRC/ICQ", in-game "emails", and also in-game "voice chat" ala CounterStrike 1.3. Other wild ideas include in-game video conferencing, and dynamically-downloaded bits of Python code that would act as all-new, not-previously-imagined entities. (Note that by "in-game" I mean the 3D world is rendered, and the email/IRC/video client application is rendered on top of the 3D world with some translucency. The idea is to keep the player immersed.) Any advice is greatly appreciated. If anybody else is using Twisted for something similar, I'd love to hear about it. Thanks, Derek Simkowiak dereks at realloc dot net [View Less]

9 19

[Twisted-Python] Issues with roots.Collections in regards to Coil
by Itamar Shtull-Trauring March 15, 2002

March 15, 2002

(If this doesn't make sense, you can probably ignore it. At some point we might make a twisted-dev list.) Issues: 1) The problem where you click on a virtual host's sub-Resource in web coil and you can't configure it. Dunno why. (I fixed some similar effect bugs which were caused by *someone* using MOVED_PERMANENTLY and ignoring the fact this gets cached by browsers, but that's not the issue here.) 2) The UI assumes entities in a collection are mutable, i.e. first created, and then … [View More]

2 2

[Twisted-Python] HTML in documentation
by Chris Armstrong March 12, 2002

March 12, 2002

It has become apparent to me that we need to standardize the tags we use in HTML documentation for Twisted. This will make it easier to apply stylesheets to it, as well as use processing tools to convert it to other formats. Here is my proposal (This is especially aimed at Moshe, since he is the HTML purist of the bunch, and I want to make sure he's happy with these so he won't decide to rebel and start his own repository of docs again ;-)). So I would like it if at least Moshe and Glyph were … [View More]to both reply to me in some fashion, even if with a simple "yes" or "no" (if it's a "no", a short explanation would be nice ;-)). Of course others are very much encouraged to chime in. The three of us aren't the only important ones around here, by a long shot. ;-) 1.) For code-snippets that are separated from paragraph content, we should either use the <code> tag, along with <pre>. for example: ---- <p> For example, this is how one defines a Resource: </p> <p> <code><pre> from twisted.web import resource class MyResource(resource.Resource): def render(self, request): return "Hello, world!" </pre></code> </p> ---- The <pre> shall not be assigned any special semantic value in processing tools or StyleSheets. It is only there so browsers will render it correctly. Special semantics shall only be assigned to <code>. 2.) For single-line code-snippets and attribute/method/module-names interpolated in a paragraph, <code> shall also be used, but without the <pre> tag. Also, module and class names should be specified with their fully-qualified name, and have a link to the API documentation, which is assumed to be in ../api/current/ (this is how it will be set up on the web-site). Regular attribute names don't need to be fully qualified (as this wouldn't make sense), but should still be enclosed in <code> tags. For example: ---- <p>To add a <a href="../api/current/twisted/web/widgets_Widget.html"><code>twisted.web.widgets.Widget</code></a> instance to a <a href="../api/current/twisted/web/widgets_Gadget.html"><code>twisted.web.widgets.Gadget</code></a> instance, do <code>myGadget.putWidget("widgetPath", MyWidget())</code>. </p> <p> (implementation note: the widgets are stored in the <code>gadgetInstance.widgets</code> attribute, which is a list.) </p> ---- I realize that adding the links to the API documentation everywhere is ugly, so I suppose it would be fine to only add the link to the first instance a module/classname shows up in the document. Just make sure there's a link in there somewhere. Maybe I'll hack on generate.py to automatically insert the links when it sees a fully-qualified twisted.* name... (but this doesn't mean one should completely disregard linking to API docs -- the idea is to have the HTML documents be browsable both with *or* without pre-processing) 3.) It goes without mentioning that one should use <hN> in a sane way to organize the document: the only <h1> shall be the title of the document, <h2> shall be sections, <h3> sub-sections, etc. 4.) Tags that have an optional closing tag should have the optional closing tag (ie, <li> and </li>). This makes it easier for some editors and processing tools to work with the code. This point isn't all that important. If it bothers someone enough, I can deal without having them. :-) 5.) Glyph says we should use XHTML, but he's a dork. Discuss. ;-) That's about it. Any other suggestions? If everyone agrees to this, I'll go through all the existing docs and update them with these rules (I doubt there will be many updates), and probably create a style-sheet to render them nicely. p.s. -- The only rules I notice that differ with Moshe's style in his existing documentation are 1.) he doesn't use <code> around multi-line code snippets and 2.) he doesn't have ending </li> tags. Is this a problem for you, Moshe? [View Less]

1 1

[Twisted-Python] Automatic reconnection
by Andrew Bennetts March 12, 2002

March 12, 2002

Hi all, I need a tcp.Client that can automatically reconnect when disconnected. I've written the following class, and it seems to work, but... * It doesn't handle unix sockets (that's ok for me, I'm using Windows, so I never had them in the first place) * I'm not sure what the "connector" is, and thus I suspect it won't for Clients that use it. * It's only lightly tested Is there a better way to do this (i.e. is there a way to do this already in Twisted, and I just haven't … [View More]found it yet)? Otherwise, I'd be interested in knowing if anyone else would find this useful, or if maybe it should be included in Twisted. I suspect I'm not the only person who wants to be able to write a server which automatically tries to recover from "upstream" problems. -Andrew. Code: class ReconnectingClient(tcp.Client): """A tcp.Client that automatically reconnects when disconnected Overrideable attributes: * reconnectionDelay -- number of seconds to wait before reconnecting * maxReconnects -- maximum number of reconnects before giving up. The reconnection counter is reset after a successfull reconnection. Set this to None to keep retrying indefinitely. The protocol will have connectionLost called as normal when disconnected, but may get reconnected after that -- so if you need to reset anything in your protocol after a disconnection, do it in Protocol.connectionLost. """ reconnectionDelay = 3.0 maxReconnects = 5 def __init__(self, host, port, protocol, timeout=None, connector=None): tcp.Client.__init__(self, host, port, protocol, timeout, connector) self.reconnectAttempts = 0 self.reconnectProtocol = protocol def connectionLost(self): # Disconnect as normal tcp.Client.connectionLost(self) # Then schedule a reconnect if main.running: # FIXME: Is this test necessary? print 'Lost connection, reconnecting...' main.addTimeout(self.reconnect, self.reconnectionDelay) def reconnect(self): if not self.connected: if (self.maxReconnects is None or self.reconnectAttempts < self.maxReconnects): self.reconnectAttempts += 1 tcp.Connection.__init__(self, self.createInternetSocket(), self.reconnectProtocol) self.doConnect() main.addTimeout(self.reconnect, self.reconnectionDelay) else: print 'Reconnection failed after %d attempts. Giving up.' \ % (self.reconnectAttempts,) else: # Reset the reconnect counter if we're connected. self.reconnectAttempts = 0 [View Less]

2 2