Mailman 3 October 2003 - Twisted

[Twisted-Python] smtp.SMTP help
by Greg 03 Oct '03

03 Oct '03

Working on an SMTP filter (consisting of an SMTP server that receives messages, some code that mangles them, then and SMTP client that forwards them along). The first step is to get a functioning SMTP server working, and I'm having some trouble with SMTPFactory / SMTP. I've overloaded the validate methods in an attempt accept emails to and from any domain, but I can't figure out how to hook in a class that implements IMessageDelivery: ----------------------------------------------------------- class MySMTPFactory(SMTPFactory): def buildProtocol(self, addr): self.protocol = MySMTPProtocol return SMTPFactory.buildProtocol(self, addr) class MySMTPProtocol(SMTP): def validateFrom(self, helo, origin): return origin def validateTo(self, user): d = defer.Deferred() reactor.callLater(0, self.fakeSucceed()) return d def fakeSucceed(self): return MyIMessage class MyIMessage: __implements__ = (smtp.IMessageDelivery) def __init__(self): print "MyIMessage.__init__ got called...." def validateTo(self, user): print "MyIMessage.validateTo got called..." return user def validateFrom(self, helo, origin): print "MyIMessage.validateFrom got called..." return origin def receivedHeader(self, helo, origin, recipients): print "MyIMessage.receivedHeader got called..." return None ----------------------------------------------------------- I gleaned most of this from looking at the testing code. The SMTP server reports "503 Must have valid receiver and originator" after the client issues the DATA command, and none of the methods in MyIMessage (except for __INIT__) ever get called. Any tips as to what I'm doing wrong? Thanks.

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[Twisted-Python] Can I use twisted http server to serve java applets
by Benjamin Polen 02 Oct '03

02 Oct '03

I want to find out if it is possible to use twisted http server to serve java applets to IE and Netscape. Some of the applets I wish to use will contain the awt and swing java libraries. Is twisted http server of doing this? I appreciate any helpful responses, Ben

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[Twisted-Python] Can twisted serve java applets
by Benjamin Polen 02 Oct '03

02 Oct '03

Can twisted serve java applets, including those which use swing or awt? Thanks Ben

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[Twisted-Python] Writing unit tests with Trial for Twisted Applications
by Travis B. Hartwell 02 Oct '03

02 Oct '03

Hey all, In my recent efforts to update the Beyond code base to use recent, preferred, and non-deprecated Twisted developments such as new cred, I have encountered a few problems in updating the unit tests to match my changes. The unit tests as they stood before my changes used the old pyunit module. After successfully converting the tests on the old code base to use twisted.trial (and fixing a probable bug in the process that pyunit didn't expose), I attempted to get them to work with my changes. That's where the problems started happening. From my experience and looking through the unit tests written for Twisted, I have come up with the following questions. As a background, the client and server that I am testing in Beyond is implemented using PB. 1. Does proper testing necessitate or at least include actually communicating over a port for the client and server? I see this is done for the PB tests and several others, but not for many. 2. Closely related, what is the proper way to connect the client and server? When I made changes, the t.test.test_pb.IOPump that the tests were using didn't seem to work. According to spiv, this may not be the preferred connecting method to use anymore. 3. From that, if I use the twisted.protocols.loopback module, how do I set up callbacks for events such as logging in? As I am using it now, it appears that things just hang and nothing is ever completed. For example, in one of my tests, I have this code, with self.p being my portal and self.c being an instance of my PB client: accum = [] factory = pb.PBClientFactory() deferred = factory.login(UsernamePassword("guest", "guest"), client=self.c) deferred.addCallbacks(accum.append, self.errorReceived) loopback.loopbackTCP(self.p, self.c) It just sits there, not advancing beyond the loopbackTCP call. 4. Regardless of the method used, what is the proper way to have the reactor keep going until there are no more events? I need something analogous to test_pb.IOPump.pump() or flush(), if IOPump is not to be used. trial.unittest.TestCase.runReactor()? 5. When is the proper time to use unittest.deferredResult? I see it used in some cases, yet in other cases regular callbacks and errbacks are used. 6. Realted to that, when I added callbacks and errbacks, they didn't seem to get executed. Yet looking at test_newcred.py, on line 89 for example, they are added and then immediately the result is checked. Does this work because I am listening on a port? Or was my doing this not working originally because the client and server were not connected? Later in the same file deferredResult is used. I'm not understanding what the expected behavior is then. 7. Is it preferred to use unittest.TestCase.assertEqual to the plain assert? I see both used in various places in the Twisted tests. I hope these questions make sense. I felt the mailing list was a better forum for this than IRC because I had detailed questions. Also, would it be appropriate for general cases of answers to these questions (especially ones like #5 and #7) to be added to the "Unit Tests in Twisted" howto? I would be willing to put those appropriate into there after someone answers my questions. :) Thanks a million, and slowly learning, Travis

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[Twisted-Python] Serving web content over SSL
by Thomas Weholt 01 Oct '03

01 Oct '03

Can anybody provide a working, simple example of a SSL-capable web-server using Twisted ? Any hints or clues regarding installation of openssl or other required library is also interesting. Thanks in advance, Thomas

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[Twisted-Python] Re: [Twisted-commits] Implement ReconnectingPBClientFactory, please review
by Itamar Shtull-Trauring 01 Oct '03

01 Oct '03

On Wed, 01 Oct 2003 01:18:38 -0600 warner CVS <warner(a)wolfwood.twistedmatrix.com> wrote: > Modified files: > Twisted/sandbox/warner/test_pb.py None 1.1 > Twisted/sandbox/warner/pb.py None 1.1 > > Log message: > Implement ReconnectingPBClientFactory, please review You can override failedToGetPerspective to get the error but because it's a callback on a Deferred and returns the error it will always cause error to get logged, which is not necessarily what you want. Maybe it shouldn't return anything. Or... hm. If you don't override it you do want the error logged. OK. -- Itamar Shtull-Trauring http://itamarst.org/ Available for Python & Twisted consulting

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01 Oct '03

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[Twisted-Python] more on IRC frustration
by Glyph Lefkowitz 30 Sep '03

30 Sep '03

Mentioning IRC frustrations in my message to paul reminded me of something. There is one stylistic hint in particular I'd like to point out, because it causes the most misunderstanding, and it seems as though it may be particular to our peculiar IRC subculture. If you're in #twisted and somebody says something like this: <usr> Hi there! I am a user with a proble integrating widgets and frobules, and there seems to be a problem with version 2.5-X of Twisted. <dev> i guess you are just an idiot then! haha idiot Though I seriously doubt such a straightforwardly hostile exchange would occur, watch the punctuation in the #twisted regular's phrase. If it follows the pattern <dev> sentence with no punctuation! additional sentence it is most likely intended as sarcasm, whereas if it is phrased with mroe conventional grammar and punctuation, <dev> I guess you're just an idiot, then. Heh. Idiot. Then you should really be offended :-). Other cues of sarcasm include use of the word "r" (for "are"), "si" (for "is"), and "teh" (for "the") We rarely make those typos unintentionally.

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