Mailman 3 May 2006 - Twisted

[Twisted-Python] Re: [Twisted-commits] r16956 - Branch for 2518bis updates.
by Jean-Paul Calderone May 30, 2006

May 30, 2006

On Mon, 29 May 2006 15:58:04 -0600, Wilfredo Sanchez <wsanchez(a)wolfwood.twistedmatrix.com> wrote: >Author: wsanchez >Date: Mon May 29 15:58:03 2006 >New Revision: 16956 > >Added: > branches/wsanchez/bis/ > - copied from r16955, trunk/ >Log: >Branch for 2518bis updates. > We've stopped using per-user directories in the branches hierarchy. Also, all branch names should be of the form <short descriptive name>-<ticket number>. See http://… [View More]

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[Twisted-Python] Flow, generators, coroutines etc.
by Dominic Fox May 29, 2006

May 29, 2006

I understand that twisted.flow is no longer maintained, and is not widely considered to represent a good way of writing twisted code. However, I haven't been able to find any explanation of why this approach (using generators to simulate co-operative multitasking) seems to have been abandoned. Is it simply the case that most people writing twisted code didn't find it very useful? Or are there more specific arguments against doing things that way? I'm trying to make the case at work for using … [View More]

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[Twisted-Python] pr0blems with meds expencies, you Are 0n right way
by Grant May 29, 2006

May 29, 2006

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[Twisted-Python] prOblems with meds expencies, you Are On right way
by Adan May 29, 2006

May 29, 2006

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[Twisted-Python] reactor.connectSSL() error handling
by Lorenzo Allegrucci May 29, 2006

May 29, 2006

Hi, I'm writing a distributed application using XML-RPC over SSL in Twisted. I need mutual authentication (server and client) but the XML-RPC Proxy in Twisted doesn't take any SSL context so I rewrote a Proxy by myself passing my ClientContextFactory subclass to reactor.connectSSL. Everything works fine but now I need to handle some possible error conditions that could prevent the connection, e.g wrong certificates, incompatible ciphersuite etc. In other words, I would like to catch these "… [View More]

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com May 28, 2006

May 28, 2006

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[Twisted-Python] Twisted 2.4.0 released
by Christopher Armstrong May 27, 2006

May 27, 2006

Twisted is an event-based framework for internet applications which works on Python 2.3.x and 2.4.x. The 2.4.0 release includes features and fixes for the various parts of Twisted, including Internet, Conch, Web, Mail, Names, and more. Hit http://twistedmatrix.com/trac/wiki/TwistedProject to see what's new and to get the latest downloads, including tarballs and Windows installers. For general information about Twisted, see the web site at http://twistedmatrix.com/. Thanks to Jean-Paul … [View More]

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[Twisted-Python] deferToThread - supported alternative to the (deprecated) setTimeout method
by Paul Moore May 26, 2006

May 26, 2006

I have a program where I think that what I want to use is deferToThread and setTimeout. However, the setTimeout method is marked as deprecated - but I can't find a good supported alternative. Can anyone help? The situation I have is: I need to do a large-ish number (50-100) of blocking calls in parallel, and collect the results or any errors. In itself, this seems like a suitable use for deferToThread (defer each call, and collect the results in the deferred callback/errback). The problem is … [View More]

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[Twisted-Python] XML-RPC server
by Kelly Vincent May 26, 2006

May 26, 2006

I am quite new to Twisted and I'm having some trouble getting my XML-RPC server to do exactly what I want. We have a relatively simple goal: create an XML-RPC server that will accept a request for a score, call a function that computes that score, and then return the score. The two catches are that 1. the client is actually a .NET web server rather than a Twisted client, and 2. we could have thousands of requests come in relatively simultaneously (though more likely not greater than a few … [View More]

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[Twisted-Python] web.client blowing up on non-fully qualified 301s
by Keith Dutton May 26, 2006

May 26, 2006

Hello, I have run into an odd problem. I am not sure if it is my issue or Twisted: any help would be appreciated. Under at least some circumstances, twisted.web.client seems to 1) not be able to follow a 301, and 2) throw an unhandled exception, when trying to follow a 301. A specific example and resulting error is given below: from twisted.internet import defer from twisted.web import client from twisted.internet import reactor class HTTPGetter(client.HTTPClientFactory): protocol = … [View More]client.HTTPPageGetter class Fetcher: def __init__(self,client_factory = HTTPGetter): self.factory = client_factory def download(self,host,port,url): f = self.factory(url) f.deferred.addCallback(self.downloadFinished).addErrback(self.downloadFailed) k = reactor.connectTCP(host, port, f, timeout=10) return f.deferred def downloadFinished(self,v): print "good" def downloadFailed(self, v): print "bad" print v r = Fetcher() w = r.download("www.shopzilla.com",80,"/aaaa") reactor.callLater(10,reactor.stop) reactor.run() This results in: Unhandled error in Deferred: Traceback (most recent call last): File "/usr/local/lib/python2.4/site-packages/twisted/internet/posixbase.py", line 226, in mainLoop self.runUntilCurrent() File "/usr/local/lib/python2.4/site-packages/twisted/internet/base.py", line 541, in runUntilCurrent call.func(*call.args, **call.kw) File "/usr/local/lib/python2.4/site-packages/twisted/internet/tcp.py", line 494, in resolveAddress d.addCallbacks(self._setRealAddress, self.failIfNotConnected) File "/usr/local/lib/python2.4/site-packages/twisted/internet/defer.py", line 182, in addCallbacks self._runCallbacks() --- <exception caught here> --- File "/usr/local/lib/python2.4/site-packages/twisted/internet/defer.py", line 307, in _runCallbacks self.result = callback(self.result, *args, **kw) File "/usr/local/lib/python2.4/site-packages/twisted/internet/tcp.py", line 498, in _setRealAddress self.doConnect() File "/usr/local/lib/python2.4/site-packages/twisted/internet/tcp.py", line 520, in doConnect connectResult = self.socket.connect_ex(self.realAddress) File "<string>", line 1, in connect_ex exceptions.TypeError: an integer is required Which is apparently due to the fact that doConnect assumes a good address and so does not trap for TypeError. The bad address that doConnect blows up on ('',None) for (host,port) slips in due to twisted.web.client.handleStatus_301. The example site (Shopzilla.com) posts a URL for the 301 Location that is not fully qualified. handleStatus_301, in the face of such a URL, appears to fail because it relies on getting the host/port from the location URL, but these are not present in it. Thus it passes in the ('',None) to its reactor.connectTCP attempt to follow the redirect, leading to the error above. My kludge fix to handleStatus_301 is given below, where if the host or port are missing I steal them from the transport, which should be correct since it was just used to get the page. I am running with this now, with no errors. Is this a Twisted issue? If so, is my fix reasonable? If it is not a Twisted issue, what am I doing wrong? Thanks, Keith def handleStatus_301(self): l = self.headers.get('location') if not l: self.handleStatusDefault() url = l[0] if self.followRedirect: scheme, host, port, path = \ _parse(url, defaultPort=self.transport.getPeer().port) self.factory.setURL(url) #following 4 lines added kad to fix apparent issue with 301 to a url that is not fully qualified if self.factory.host == '': self.factory.host = self.transport.addr[0] if self.factory.port == None: self.factory.port = self.transport.addr[1] [View Less]

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