Mailman 3 June 2010 - Twisted

[Twisted-Python] Twisted Python 0.7.0 Prerelease Testing
by Glyph Lefkowitz 05 Aug '21

05 Aug '21

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. ______ __ __ _____ _ _ | ____ | \_/ |_____] |_____| |_____| |_____ | | | | @ t w i s t e d m a t r i x . c o m http://www.twistedmatrix.com/~glyph/

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01 May '19

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[Twisted-Python] regarding xml elements
by Raj kumar 02 Oct '13

02 Oct '13

Hi, I have an xml file in my application, I have created an element using Example goes like this......... document.createElement("abc") and i appeneded it by using append() method. But how i can reflect this change to my xml file? and one more thing is i want to create element with some other parameters.... like............. <abc m=" " n=" "> </abc> and i have m and n values as strings with me. can anybody help me to create this element and write it to the existing xml file as a child of an existing element? Thanks in advance.. Raj.. Forgot the famous last words? Access your message archive online at http://in.messenger.yahoo.com/webmessengerpromo.php

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[Twisted-Python] Get IP of connecting client in XMLRPC server
by Remy C. Cool 28 Apr '13

28 Apr '13

Hello, On 18 May 2004, the following message was posted to this mailinglist: Jp Calderone exarkun at divmod.com wrote: >Daniel Newton wrote: > > I have a simple XML-PRC server similar to the example below: > > from twisted.web import xmlrpc, server > > class Example(xmlrpc.XMLRPC): > """An example object to be published.""" > > def xmlrpc_add(self, a, b): > """Return sum of arguments.""" > return a + b def xmlrpc_whatIsMyAddress(self): return self.transport.getPeer().host > > if __name__ == '__main__': > from twisted.internet import reactor > r = Example() > reactor.listenTCP(7080, server.Site(r)) > reactor.run() > > I want to be able to get the address of the client that calls the xmlrpc > method can anyone help me with this? This solution didn't work because 'transport' isn't a property of the Example class. I'm currently in the process of changing from a customized SimpleXMLRPCServer to a twisted XMLRPC server solution and I need to insert the client IP into the attributes passed to the called xmlrpc method. Anyone who knows the answer and is willing to share the info? Regards, Remy

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[Twisted-Python] http.Request and JSON
by Vincent Gulinao 25 Jan '12

25 Jan '12

How do you read JSON content from a POST using http.Request. I peeked on args and it's empty. TIA.

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[Twisted-Python] twisted.protocols.basic.NetstringReceiver: Some errors are not visible
by Carlos Valiente 14 Jul '10

14 Jul '10

>From twisted/protocols/basic.py: class NetstringReceiver(protocol.Protocol): def doLength(self): ... raise NetstringParseError, "netstring too long" ... def dataReceived(self, data): ... try: ... self.doLength() ... except NetstringParseError: self.transport.loseConnection() self.brokenPeer = 1 The error message "netstring too long" is shadowed by the except block. I'd like to see it in my log files. Would it make sense to emit logging messaged for those errors, or is there any particular reason why they are silenced? Cheers, Carlos

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[Twisted-Python] Lore to Sphinx Conversion Progress Report 6
by Kevin Horn 10 Jul '10

10 Jul '10

It's been a while, I know you were all waiting with baited breath... First a few fixes: - Thanks to Tim Allen and Steve Steiner, several theme issues were fixed. This fixes a few minor display bugs and should make pages validate properly. - inline markup will now include child contents. This causes rst not to display properly in cases of "nested inline markup", but should make it easier to manually fix these places later - :download: links are now generated for non-rst files ending in .py (most of the examples), as welll as .tac and .sql files - toc entries which end in a "/" character now have "index appended to them in the ReST output, which fixes a few issues where the built-Sphinx docs would end up with broken navigation links. A couple of issues were also fixed at the PyCon sprints: - <cite> tags are now handled...sort of. According to Glyph, these aren't really very important, so we just return the contents of the tag without any special markup. If we feel the need to put citation markup back into the docs we can do that post-transition. - Glyph also found an easy way to improve the CSS of the theme somewhat. The issue where the sidebar drops below the main content should now be less of a problem, though it's not gone entirely. - Glyph and I also discussed a few different ways to handle links to the API docs and agreed on a way forward. Basically, well change the <code class='API'> tags into something like: :api:`path.to.documented object <label>`, and then create a docutils extension to convert that into a link. The beginnings of this are in the hg repos, but it looks like it won't be quite as simple as we thought. First, the way pydoctor generates links is deceptively simple. If you look up a module, like "twisted.internet.defer", the link looks like this: http://twistedmatrix.com/documents/9.0.0/api/twisted.internet.defer.html If you look up a class, like "twisted.internet.defer.Deferred" for example, the link looks like this: http://twistedmatrix.com/documents/current/api/twisted.internet.defer.Defer… Pretty simple right? But if you look up a function or method like "twisted.internet.defer.Deferred.callback", the link has an anchor, like so: http://twistedmatrix.com/documents/9.0.0/api/twisted.internet.defer.Deferre… So we'll need to do some checking on either the api docs or on twisted itself to determine what sort of object is being linked to. Shouldn't be super-difficult, just haven't had time yet. Second, I haven't yet figured out how to access the Sphinx config object from a docutils role function. I'm sure this is just a matter of finding an example or getting an answer from the mailing list, but I just haven't gotten to it yet. I think the API links are the only major issue still remaining until we start doing the conversion, so once this issue is handled, I'll probably file a ticket and create a branch in SVN for the conversion. If anyone has any docs tickets open, now is the time to get them fixed! And if anyone has some great ideas about how to organize the new docs in the repository, I'd love to hear them. As always, converted docs are here: http://twistedsphinx.funsize.net/ The lore2Sphinx Hg repos is here: http://bitbucket.org/khorn/lore2sphinx/ Comments, ideas, patches and pull requests gratefully accepted (or at least discussed). Kevin Horn

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[Twisted-Python] Creating a COM object in a thread
by Don Dwiggins 07 Jul '10

07 Jul '10

I need to create a COM object in a Windows application, and call it. Since the call will take some time to execute, I wrap it in a deferToThread. I've found that, when I create the object inline, it works. However, when I defer it, it hangs up in the win32com.client.Dispatch call. I've tried several things, including digging into the guts of Dispatch -- the hangup occurs during the creation of the object. I've discussed this with Mark Hammond, who suggests one lead: "The Windows message loop is used by the COM marshalling process. IIRC, the first thread to initialize COM in a process is the thread in which single-threaded objects will always end up being called in. If a different thread creates the object, COM uses Windows messages to marshall all calls back to that main thread. IOW, your second thread makes a call - even to create the object - which results in that thread sending a windows message to the main thread to act on the request. What this probably means in practice is that twisted needs to use a reactor which calls MsgWaitForMultipleObjects() and runs a message loop when the function detects a new message is in the queue. I'm not sure if there is an existing reactor which does this." I'm posting this on the off chance that someone else has wandered into this corner of Windows arcana, and has come up with something useful. I'm about to give up on doing this "inside" the twisted app, and running it in a separate app that I'll call from the thread. TIA, -- Don Dwiggins Advanced Publishing Technology

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[Twisted-Python] making Screwtape (Tim Allen) a committer
by Glyph Lefkowitz 02 Jul '10

02 Jul '10

I think we should give screwtape an SVN account and make him an official reviewer. He's been doing a lot of work on the distutils code which would be made easier by that, and he's been doing pretty decent reviews. Thoughts? (Feel free to voice any comments off-list, too.)

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[Twisted-Python] getting all results from DeferredList
by Pet 30 Jun '10

30 Jun '10

Hello, I'm trying to process results from several Deferreds (d1, d2) with DeferredList, merging it into one list and sending back to client. While merging works, the client has no results. What is the way to do tasks (db queries in my case) in parallel and then merge results? BTW, are nested runInteraction ok? Thanks for help! Pet class Test: def __init__(self, cursor): self.cursor = cursor def test(db, params): if params.get('query'): params['q'] = self.someFunc3(db, params) def processResults(results, out): #merge results into one for _, r in results: out.extend(r) return out out = [] d1 = self.cursor.runInteraction(self.someFunc, params) d2 = self.cursor.runInteraction(self.someFunc2, params) d = DeferredList([d1,d2]) d.addCallback(processResults, out) d.addErrback(log.err) return d class XMLRPCProtokoll(xmlrpc.XMLRPC): def __init__(self): self.db = adbapi.ConnectionPool() xmlrpc.XMLRPC.__init__(self, True) def xmlrpc_test(self, param): t = Test(self.db) return self.db.runInteraction(t.test, param)

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