Mailman 3 January 2004 - Twisted

[Twisted-Python] BEEPy - a Python BEEP library
by Justin Warren Jan. 9, 2004

Jan. 9, 2004

Hi folks, I'm relatively new to twisted, but I saw some discussion early in 2003 around BEEP and twisted lamenting the lack of a Python library. I hope this is the right place to post. I'm the developer of a library called BEEPy which is a BEEP implementation written in pure Python. I recently redesigned the core to use twisted for TCP and SSL comms, so I figured you folks might be interested in it. BEEPy is LGPL licensed and hosted over at sourceforge: http://beepy.sourceforge.net/ for the curious. A quick summary of features: - Implemented using twisted Protocol and Factory subclasses - Support for TLS for transport layer security - Support for SASL ANONYMOUS and OTP mechanisms for authentication - Implements the BEEP management profile - Reference implementation of an echo profile - Loads of example code Cheers, Justin -- "Either way, it'll remind the clued that there's only one letter difference between "turkey" and "turnkey"." -- Mike Andrews in a.s.r

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[Twisted-Python] how to get form values in woven?
by Mike Mueller Jan. 9, 2004

Jan. 9, 2004

I am just starting with woven. I couldn't find a simple example how to get the values from a submitted form. Reading the HOWTOs and searching the twisted mail archives as well as web didn't bring up what I was searching for. An example: from twisted.application import service, internet from twisted.web.woven import page from twisted.web import server, resource class FirstPage(page.Page): template = """<html> <head> <title>First Form</title> </head> <body> <h3>First Form</h3> <form action="processMyForm" method="post"> <p> Text1: <input type="text" id="Text1"/><br/> Text2: <input type="text" id="Text2"/><br/> <input type="submit" value="Send"/> </p> </form> </body> </html> """ def initialize(self, *args, **kwargs): self.numberOfProcessCalls = 0 def wchild_processMyForm(self, request): self.numberOfProcessCalls += 1 keysValues = [] for k, v in request.__dict__.items(): keysValues.append('%s:\t %s' %(k,v)) model = {'keys-values': keysValues, 'number':self.numberOfProcessCalls} return page.Page(model, template= """<html> <body> Number of calls: <p model="number" view="Text" /> <h3>arg keys: values</h3> <div model="keys-values" view="List"> <p pattern="listItem" view="Text" /> </div> </body> </html>""") p = FirstPage() application = service.Application('SimpleForm') internet.TCPServer(8088, server.Site(resource.IResource(p))).setServiceParent(service.IServiceCollection(application)) There are several problems with this. 1.) wchild_processMyForm gets called twice every time the submit button is hit 2.) for the first call the method is post for, the second it is get 3.) arg is always {}, so nothing to process Obviously, I am doing something wrong. Basically I just want to echo back the name/values pairs that where entered into the form. How do I do this with woven? Thanks Mike

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[Twisted-Python] Re: Newbie Question about PB and Firewalls
by Patrick Gilmartin Jan. 9, 2004

Jan. 9, 2004

Thanks for quick your response. I finally realize the errors in my logic regarding client side firewall settings. I look forward to becoming proficient with Twisted and incorporating it into overall IT infrastructure. Thanks again, Patrick --- On Thu 01/08, Eric <input class="txtDsp" type="text" size="8" name="word2" value= "<input" class="txtDsp" type="text" size="8" name="word3" value="-net.net" wrote: From: Eric python(a)twistedmatrix.com Date: Thu, 8 Jan 2004 20:05:59 -0700 Subject: [Twisted-Python] Re: Newbie Question about PB and Firewalls On Thursday 08 January 2004 04:14 pm, Patrick Gilmartin wrote:<br> I have been reviewing Twisted site and documentation fairly extensive<br> for the past couple of months.<br><br> I have just downloaded it to start working with it, but before I get<br> started there are some answers I seek that will really help in my<br> overall plans.<br><br> From all the reading I have done, it looks like PB would be the<br> optimal protocol for me to use. I understand where I have decision<br> making power at both ends of the line, I can modify the Firewalls<br> settings to accommodate the port(s).<br><br> But I know I will have situations where the client side will be<br> behind a firewall where I do manage the decision making process.<br><br>If it's the client side it shouldn't have a problem connecting out to <br>the Internet.<br><br>Or perhaps the firewall only allows certain outbound ports? If a user is <br>running such a firewall setup they pretty much need to be able to allow <br>more ports as needed.<br><br>One<br> of the reasons why XML-RPC and SOAP are broadly popular choices is<br> that they are over HTTP.<br><br>They're the same as far as crossing firewalls is concerned.<br><br><br> Given the above situation about Firewall settings where I have no<br> control, is my assumption correct that the PB protocol is not an<br> option for me.<br><br>No, probably not, but I don't think I understand your problem.<br><br><br> Thanks in advance for your help.<br><br> Patrick<br><br> _______________________________________________<br> Join Excite! - <input class="txtDsp" type="text" size="8" name="word9" value="://www.excite.com<br"> The most personalized portal on the Web!<br><br> _______________________________________________<br> Twisted-Python mailing list<br> Twisted-<input class="txtDsp" type="text" size="8" name="word12" value=".com<br"> <input class="txtDsp" type="text" size="8" name="word14" value="-<input" class="txtDsp" type="text" size="8" name="word15" value="-python<br"><br><br><br><br><br>_______________________________________________<br>Twisted-Python mailing list<br>Twisted-http://twistedmatrix. _______________________________________________ Join Excite! - http://www.excite.com The most personalized portal on the Web!

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[Twisted-Python] Newbie Question about PB and Firewalls
by Patrick Gilmartin Jan. 9, 2004

Jan. 9, 2004

I have been reviewing Twisted site and documentation fairly extensive for the past couple of months. I have just downloaded it to start working with it, but before I get started there are some answers I seek that will really help in my overall plans. >From all the reading I have done, it looks like PB would be the optimal protocol for me to use. I understand where I have decision making power at both ends of the line, I can modify the Firewalls settings to accommodate the port(s). But I know I will have situations where the client side will be behind a firewall where I do manage the decision making process. One of the reasons why XML-RPC and SOAP are broadly popular choices is that they are over HTTP. Given the above situation about Firewall settings where I have no control, is my assumption correct that the PB protocol is not an option for me. Thanks in advance for your help. Patrick _______________________________________________ Join Excite! - http://www.excite.com The most personalized portal on the Web!

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[Twisted-Python] Re: Re: Re: Resume FTP file retrieval
by Richard.Townsend＠edl.uk.eds.com Jan. 8, 2004

Jan. 8, 2004

Hi Andrew, Many thanks for the patch. I had to fix 3 typos to get it to run: Line 1867 needs an extra closing parenthesis: cmds.insert(0, ('REST ' + str(offset))) Line 1868 needs the missing 'cmds' parameter: return self.receiveFromConnection(cmds, protocol) Line 1885 needs an extra closing parenthesis: cmds.insert(0, ('REST ' + str(offset))) My test program then successfully did a partial download! Best regards, Richard Townsend

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[Twisted-Python] wxreactor
by Jonathan Daugherty Jan. 8, 2004

Jan. 8, 2004

I'm using debian unstable, twisted version 1.1.1-1, python 2.3. I'm running a wxPython demo script from the twisted site which uses the wxreactor; it will not run, and it cannot import the wxreactor. The error, as one would expect, is: File "test.py", line 20, in ? from twisted.internet import wxreactor ImportError: cannot import name wxreactor A search of the python2.3-twisted package and wxsupport.py file indicates no such entity exists. However, I know that a wxreactor has been in development: is this merely a limitation of the debian package I am using, or has it not yet been introduced into the release? Thanks! -- Jonathan Daugherty http://www.cprogrammer.org "It's a book about a Spanish guy called Manual, you should read it." -- Dilbert

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[Twisted-Python] newbie: using serial ports in plugin
by Nic Cave-Lynch Jan. 8, 2004

Jan. 8, 2004

Hi people I need to write an application which will receive data from a number of serial ports, mash it around a lot, then forward the mashed results across a TCP connection to another box where it's all un-mashed and spat out one of a number of serial ports there. All conceptually fairly simple, and Twisted looked like it would help enormously. But I can't work out how to daemonise an application which is bound to a serial port. The neither the gpsfix.py or the mouse.py examples seem to follow the required interface for being able to be turned into a 'tap'. I've looked at other approaches (like munging the portforward.py concepts -- that doesn't seem to allow the SerialPort intialisations to work properly) but I keep hitting dead ends (and my head against a brick wall) Can anyone give me any pointers, or better still, some example code of a serial port protocol running as a daemon. All help gratefully received Nic C-L

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[Twisted-Python] UNIX socket problem
by Matteo Giacomazzi Jan. 7, 2004

Jan. 7, 2004

Hello, I have a problem with a TAP using UNIX socket. On one server it works fine, on another one it raises a strange exception, here is the trace if someone can help... I can't understand why self.factory, where self should be a unix.Connector instance, get an int value instead of the factory I provide. And, in any case, I cannot understand why it happens on one server but not in another one (same Python and Twisted version). Thanks! 2004/01/07 11:44 CET [-] Traceback (most recent call last): 2004/01/07 11:44 CET [-] File "/usr/bin/twistd", line 36, in ? 2004/01/07 11:44 CET [-] run() 2004/01/07 11:44 CET [-] File "/usr/lib/python2.3/site-packages/twisted/scripts/twistd.py", line 188, in run 2004/01/07 11:44 CET [-] app.run(runApp, ServerOptions) 2004/01/07 11:44 CET [-] File "/usr/lib/python2.3/site-packages/twisted/application/app.py", line 200, in run 2004/01/07 11:44 CET [-] runApp(config) 2004/01/07 11:44 CET [-] File "/usr/lib/python2.3/site-packages/twisted/scripts/twistd.py", line 179, in runApp 2004/01/07 11:44 CET [-] startApplication(config, application) 2004/01/07 11:44 CET [-] File "/usr/lib/python2.3/site-packages/twisted/scripts/twistd.py", line 165, in startApplication 2004/01/07 11:44 CET [-] app.startApplication(application, not config['no_save']) 2004/01/07 11:44 CET [-] File "/usr/lib/python2.3/site-packages/twisted/application/app.py", line 220, in startApplication 2004/01/07 11:44 CET [-] service.IService(application).startService() 2004/01/07 11:44 CET [-] File "/usr/lib/python2.3/site-packages/twisted/application/service.py", line 194, in startService 2004/01/07 11:44 CET [-] service.startService() 2004/01/07 11:44 CET [-] File "/usr/lib/python2.3/site-packages/twisted/application/service.py", line 194, in startService 2004/01/07 11:44 CET [-] service.startService() 2004/01/07 11:44 CET [-] File "/usr/lib/python2.3/site-packages/twisted/application/internet.py", line 81, in startService 2004/01/07 11:44 CET [-] self._connection = self._getConnection() 2004/01/07 11:44 CET [-] File "/usr/lib/python2.3/site-packages/twisted/application/internet.py", line 89, in _getConnection 2004/01/07 11:44 CET [-] return getattr(reactor, 'connect'+self.method)(*self.args, 2004/01/07 11:44 CET [-] File "/usr/lib/python2.3/site-packages/twisted/internet/default.py", line 232, in connectUNIX 2004/01/07 11:44 CET [-] c.connect() 2004/01/07 11:44 CET [-] File "/usr/lib/python2.3/site-packages/twisted/internet/base.py", line 553, in connect 2004/01/07 11:44 CET [-] self.factory.doStart() 2004/01/07 11:44 CET [-] AttributeError: 'int' object has no attribute 'doStart' Kindest regards, Matteo

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[Twisted-Python] Re: Re: Re: Resume FTP file retrieval
by Richard.Townsend＠edl.uk.eds.com Jan. 7, 2004

Jan. 7, 2004

Hi Andrew, I have tried to follow the code in FTPClient. It looks like the _openDataConnection() method is responsible for sending the PORT/PASV before the RETR. However, I'm not sure how it could be safely modified to send a REST between the two requests. I need this facility to be able to resume a partial download when transferring large files over an unreliable comms link. Would you or another of Twisted experts be able to help make this change? thanks, Richard Townsend (2nd attempt to post this)

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[Twisted-Python] XML Parsing Error in tutorial.xhtml
by a.vredegoor＠hccnet.nl Jan. 7, 2004

Jan. 7, 2004

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

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