Mailman 3 February 2010 - Twisted

[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com 06 Feb '10

06 Feb '10

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[Twisted-Python] Sending a stream via Protocol?
by Darren Govoni 06 Feb '10

06 Feb '10

Hi, I have a simple protocol listening on a port. I send it a text message (a filename) and the protocol tries to stream back the bytes of the file. Mostly, this works but in some cases, the receiving side receives less bytes than is written by: self.transport.write(bytes) I read the API which says it can receive less than expected bytes or messages. Why? So how can I reliably send a sequences of bytes via "dataReceived" in my protocol? Thanks for any help! Darren

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[Twisted-Python] Fwd: Twisted + python = TELNET server (without AUTH)
by Knezan 06 Feb '10

06 Feb '10

Hi. I am long time in python and having twisted is good thing. I want to make telnet server (with python or linux prompt) but without auth, beacuse i'd use it via serial port (RS232) ideas? Greetings, Vatts -- case(word == "ping"): # TABLE TENNIS!!! say "pong "+params return

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[Twisted-Python] Simple gateway server
by 徐乔 06 Feb '10

06 Feb '10

I need to write a gateway server that forwarding data between client and data server。I use a Protocol instance for incoming connection from client, and creating another Protocol instance to connect data server when received data from client: Exp.1 ... Class ToClientProtocol(Protocol): """ Protocol for incoming connection from client. """ def connectionMade(self): self.data_server = reactor.connectTCP('localhost', 8888, DataServerFactory()) # make connection to data server self.data_server.transport.write('hello!') # send a message to data server, but not work ... The connetion to data server can be made, BUT the data server received nothing. self.data_server.transport.write() not work. It will work if I write like that: Exp. 2 ... Class ToClientProtocol(Protocol): """ Protocol for incoming connection from client. """ def connectionMade(self): self.data_server = reactor.connectTCP('localhost', 8888, DataServerFactory(self)) # make connection to data server Class DataServer(Protocol): """ Protocol for connection to data server. """ def __init__(self, client): self.client = client def connectionMade(self): self.client.data_server.transport.wirte('hello!') # send message to data server, it's work now! Class DataServerFactory(self): def __init__(self, client): self.client = client def buildProtocol(self, addr): return DataServer(self.client) ... I don't think this is the best way. Why I can't simply wirte like Exp.1?

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Re: [Twisted-Python] Lore to Sphinx Conversion Progress Report 5
by Terry Jones 05 Feb '10

05 Feb '10

Hi Kevin I think this is looking really good. Here are a few superficial / quick comments. - It looks fine under Google chrome - You could reduce visual repetition / density of some of the high-level pages by taking out a word like "Documentation" which appears in the heading and on every line of things like this: Twisted Documentation Table of Contents Twisted Conch Documentation Twisted Core Documentation Historical Documents Twisted Lore Documentation Twisted Mail Documentation Twisted Names Documentation Twisted Pair Documentation Twisted VFS Documentation Twisted Web Documentation Twisted Web2 Documentation Twisted Words Documentation See also http://twistedsphinx.funsize.net/contents.html which is very cluttered with repeated content. I realize these are probably just being picked up out of the .rst header line, and that one of those documents when seen in isolation probably should have a full title. I'm not sure how best to simplify the top-level, though I guess it's possible to extend the sphinx layout.html and override something... may be more trouble than it's worth. - I think it would improve appearance a little to have a non-intrusive border around the green source code boxes. I'll see if I can find/make time to have a look at the CSS. Terry

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[Twisted-Python] Question about ReconnectingClientFactory and conch StatefulTelnetProtocol
by Mark Bailey 05 Feb '10

05 Feb '10

Good day, everyone: Continuing my effort to learn Python and Twisted, I need to create several Telnet clients and somehow send two arguments to each and receive data from each. I tried the same pattern that I used with the Telnet server and created a Factory, actually a ReconnectingClientFactory. It doesn't work. My source and the error (no attribute 'factory') are below. Do the "conch" protocols not support a factory? Is there an alternative that provides a Telnet client with a lineReceived method? What am I doing wrong? :-) I suppose I could pass arguments to ClusterClient by overriding __init__, but that seems inelegant. Thanks for your help. Mark ---------- from twisted.internet.protocol import Protocol, ReconnectingClientFactory from sys import stdout from twisted.internet import reactor from twisted.conch.telnet import StatefulTelnetProtocol class ClusterClient(StatefulTelnetProtocol): def lineReceived(self, data): print self.factory.prompt, self.factory.call print data class ClusterClientFactory(ReconnectingClientFactory): protocol = ClusterClient def __init__(self): self.prompt = "call:" self.call = "kd4d" def startedConnecting(self, connector): print 'Started to connect.' def buildProtocol(self, addr): print 'Connected.' self.resetDelay() return ClusterClient() def clientConnectionLost(self, connector, reason): print 'Lost connection. Reason:', reason ReconnectingClientFactory.clientConnectionLost(self, connector, reason) def clientConnectionFailed(self, connector, reason): print 'Connection failed. Reason:', reason ReconnectingClientFactory.clientConnectionFailed(self, connector, reason) if __name__ == '__main__': factory = ClusterClientFactory() factory.maxDelay = 120 # two minutes print factory.prompt, factory.call reactor.connectTCP("localhost", 8023, factory) reactor.run() ----------------- File "ClusterClient.py", line 11, in lineReceived print self.factory.prompt, self.factory.call exceptions.AttributeError: ClusterClient instance has no attribute 'factory' Lost connection. Reason: [Failure instance: Traceback (failure with no frames): <type 'exceptions.AttributeError'>: ClusterClient instance has no attribute 'fa ctory' ]

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Re: [Twisted-Python] Lore to Sphinx Conversion Progress Report 5
by Terry Jones 05 Feb '10

05 Feb '10

> - It looks fine under Google chrome Argh, having said that, I just noticed the table of contents is below and to the right of the main page content. An example page that exhibits this is http://twistedsphinx.funsize.net/projects/conch/howto/conch_client.html Terry

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Re: [Twisted-Python] Lore to Sphinx Conversion Progress Report 5
by Terry Jones 05 Feb '10

05 Feb '10

Hi Kevin I just tried building under Python 2.5.2 and got this: $ python lore2sphinx.py Traceback (most recent call last): File "lore2sphinx.py", line 32, in <module> from table import Table File "/home/terry/s/net/lore2sphinx/table.py", line 214 row_lines = list(izip_longest(*row_split, fillvalue='')) ^ SyntaxError: invalid syntax >From a quick look at table.py, I don't see the problem. I have to go to a meeting now, so can't dig into it ATM. Also, I have Spinx 0.6.3 installed, not 0.6.4 BTW, why is there a Python 2.6 requirement? I wrote all the FluidDB docs in Sphinx with 2.5 (http://doc.fluidinfo.com/fluidDB/). Terry

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[Twisted-Python] Lore 2 Sphinx addendum: Divmod docs
by Kevin Horn 05 Feb '10

05 Feb '10

For those that are interested, my current Sphinx versions of the docs for the 3 Divmod projects that have Lore-format docs (Epsilon, Mantissa, and Nevow) are here: http://divmodsphinx.funsize.net/ They just use the default Sphinx theme at the moment. Enjoy! Kevin Horn

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[Twisted-Python] Lore to Sphinx Conversion Progress Report 5
by Kevin Horn 05 Feb '10

05 Feb '10

This time on "How the Docs Conversion Turns"... Moving along at about the same pace, but this time have some very visible results! Here's the latest: - The generated toctree directives now preserve the order of the links from the original source documents. This makes the "prev"/"next" links work in a sane fashion in the resulting Sphinx docs. - Comments in Lore docs are now translated properly. - You want Trac integration? I got your Trac integration right here! http://twistedsphinx.funsize.net/ OK, so it's not quite done yet, but I was pretty impressed at the results of what amounts to about a day's work. It still needs some tweaks here and there, but I'm mostly satisfied with it. If there are any CSS gurus out there who are willing to take a look at this, there are a few spots that are giving me fits. Send me an email or look me up on IRC. In any case, I'd appreciate it if everyone would take a look and tell me what they think. (Disclaimer: I haven't really tested this in anything but Firefox, except for a brief glance in IE, so if people could test it out in Safari, etc. that would be helpful) - The previous look (which was just the default theme, with a color scheme to match the Twisted website) has been moved into it's own Sphinx theme. Sphinx's theme inheritance made this really easy. This way people can build the docs with the "old" look if they wish, or maybe we can use it for docs tarballs or .CHM files or something. Still to come: - <code class="API"> tags still need handling. - Certain links need special handling as they don't quite display properly. - "Inline markup" still needs a bit more work. - XHTML entities need resolving, but as I've mentioned previously, this will probably be the very last thing I address. All in all, I think this is starting to come together. I'm hoping to have the rest completed by PyCon, but if I don't manage that, I'll probably sprint on this on Monday. code is here: http://bitbucket.org/khorn/lore2sphinx/ current converted docs here: http://twistedsphinx.funsize.net/ Until next time.. Kevin Horn

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