#jython IRC Log

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IRC Log for 2013-09-17

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[7:25] <topi`> jimbaker: excellent! in other news, it seems that the Twisted devs have assigned the twisted.trial jython issues to me ;)
[7:25] <topi`> they need trial running so that they can run the tests under jython
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[18:43] * Topic is 'Try Jython 2.7b1 at http://tinyurl.com/d4s8qvd | This channel is logged: http://jython.extreme.st/irclogs/ | Please update the wiki: http://wiki.python.org/jython | Jython Book: http://jythonbook.com | Podcast: http://jython.org/jythonpodcast/'
[18:43] * Set by Juneau001!~Juneau@50-45-119-204.dklb.il.frontiernet.net on Tue Feb 12 23:33:36 UTC 2013
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[19:25] <topi`> ouch. urllib2.urlopen doesn't work with https: urls
[19:31] <topi`> jimbaker: any ways around this SSL handshake exception?
[19:31] <topi`> maybe I should just avoid urllib2. Maybe there's a good java alternative.
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[19:34] <topi`> there is Apache HttpClient, but the example has ~30 lines of code, so not exactly a neat urllib2 replacement ;)
[19:44] <topi`> I tried out java.net.URL
[19:44] <topi`> PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
[19:44] <topi`> it doesn't seem to like my self-signed certificate...
[19:57] <jimbaker> topi`, you need code like this: https://github.com/rackerlabs/romper/blob/master/romper/trust.py
[19:58] <jimbaker> regardless of whether you use java.net.URL or the socket reworking (needs to be completed!) in https://bitbucket.org/jimbaker/jython-ssl
[19:59] <jimbaker> topi`, you could also install any certs at the JVM level; i hope the all-trust cert manager i linked makes it clear that this is the recommended solution :)
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[20:14] <topi`> which one is the recommended solution?
[20:14] <topi`> at least the all-trust mgr looks fairly complex to me...
[20:15] <jimbaker> topi`, i think it's by far the simplest solution
[20:15] <topi`> that trust.py does look a lot shorter than the java examples I saw on stackoverflow
[20:15] <jimbaker> topi`, first, we start with python :)
[20:16] <jimbaker> topi`, it would be nice to put together a pypi package for this too
[20:17] <jimbaker> i could imagine it could even include tools for helping managing the trust store
[20:20] <topi`> conn.setRequestProperty("Authorization", "Basic " + b64string)
[20:20] <topi`> IllegalArgumentException: java.lang.IllegalArgumentException: Illegal character(s) in message header value: Basic YWRtaW46c2lydWhhY2s=
[20:20] <topi`> any hints what kind of illegal chars are there?
[20:21] <jimbaker> topi`, maybe let's see if this is actually uuencoded?
[20:21] <topi`> clearly the string concatenate is successful, but then maybe wrong encoding?
[20:25] <jimbaker> topi`, clearly something like "YWRtaW46c2lydWhhY2s=".decode("base64") is fine
[20:26] <jimbaker> so it's somewhere else, hopefully close by
[20:28] <topi`> I didn't realize the encode/decode issues would extend to coercing to java methods as well :)
[20:28] <jimbaker> topi`, speaking about trust, what if we created the following pypi package (https://pypi.python.org/pypi/trust/ is free, unlike https://pypi.python.org/pypi/distrust/)
[20:29] <jimbaker> which supports a flexible trust manager, including blind trust; and it also include jython command line scripts to manage a trust store
[20:30] <topi`> CPython itself doesn't even have the concept of trust ;)
[20:30] <topi`> it trusts blindly everything. maybe a generic manager? or is it too difficult to share codebase between CPython and Jython?
[20:33] <jimbaker> topi`, so in the current ssl, one can specify a set of ca_certs for a given wrapped_socket. i'm not certain how to map this to java, at least not globally
[20:33] <jimbaker> http://docs.python.org/2/library/ssl.html#ssl.wrap_socket
[20:37] <jimbaker> topi`, actually it looks better than i suspected, http://docs.oracle.com/javase/7/docs/api/javax/net/ssl/SSLContext.html#getInstance(java.lang.String)
[20:38] <jimbaker> "A **new** SSLContext object encapsulating the SSLContextSpi implementation from the first Provider that supports the specified protocol is returned."
[20:40] <jimbaker> so we can configure at the SSLContext level. awesome, because i already had to use individual SSLContext objects anyway, as seen here: https://bitbucket.org/jimbaker/jython-ssl/src/29686771c25ccaa891d68d18802c983a97cfde5c/Lib/ssl.py?at=default#cl-121
[20:42] <topi`> also CPython urllib2 uses SSLContexts in the same way, conceptually
[20:42] <jimbaker> note that "blind trust" or trust store modification is still needed for circumstances like using java.net.URL - there's no way to change their use of the default SSL context
[20:43] <jimbaker> topi`, cool
[20:43] <topi`> because they automatically create the SSLcontext?
[20:43] <jimbaker> yes, in the world of java factories, there's no way to inject here
[20:43] <jimbaker> ironic...
[20:44] <topi`> if you create a factory in jython (inheriting from java base), couldn't it be possible to inject?
[20:44] <jimbaker> maybe there's a "guicable" version in say the google client
[20:44] <jimbaker> you mean java.net.URL? i don't see how
[20:45] <topi`> what about apache HttpClient?
[20:45] <jimbaker> one could use a bootpath jar to intercept java.net.URL
[20:46] <topi`> this becomes slightly too hacky
[20:46] <topi`> I prefer the python mantra, about making things explicit
[20:47] <jimbaker> topi`, exactly. anyway, it's interesting stuff. so the takeaway here is that we could potentially better manage in python
[20:47] <jimbaker> while providing some good tools in jython
[20:47] <jimbaker> anyway, i like the idea of putting together a trust package in pypi for this stuff
[20:47] <topi`> how's your writeup on ProxyMaker? :)
[20:48] <jimbaker> topi`, seriously i should not hang out here ;)
[20:48] <jimbaker> it's going well. i realized that i should refactor clamp
[20:49] <jimbaker> so i put together a new project for that. let me make it public...
[20:49] <topi`> writing doc also lets you rethink things, like refactor methods :)
[20:50] <jimbaker> ok, it's public. just a shell now but soon, there will be stuff there: https://github.com/rackerlabs/clamp/
[20:50] <jimbaker> topi`, the true virtue of open sourfce
[20:50] <jimbaker> i'm just going through my earlier questionable decisions :), and making them better and more usable for general usage
[20:50] <topi`> java.lang.IllegalArgumentException can be triggered when expecting Unicode and receiving ascii?
[20:51] <topi`> but if I .decode('ascii') then the end product ought to be unicode?
[20:51] <jimbaker> topi`, fuller context? in general, i wouldn't want to have java leak out like that in python code...
[20:51] <topi`> i'm calling setRequestProperty on a connectino
[20:52] <topi`> see java.net.URL
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[20:54] <jimbaker> topi`, btw, it's considered idiomatic jython to say, conn.requestProperty = ...
[20:54] <jimbaker> this automatically gets translated to conn.setRequestProperty(???)
[20:54] <topi`> thanks!
[20:55] <jimbaker> i mean, you could do it the java way, but i personally prefer it the python way ;)
[20:55] <topi`> if I pass in a tuple..?
[20:55] <jimbaker> so anyway, in this case, it definitely can leak java exceptions
[20:56] <jimbaker> topi`, then it better accept something that it can coerce from a tuple
[20:56] <jimbaker> it = jython runtime
[20:57] <topi`> the conn.setRequestProperty() takes 2 args, the Header name and the Header value
[20:57] <topi`> AttributeError: 'sun.net.www.protocol.https.HttpsURLConnectionImpl' object has no attribute 'requestProperty'
[20:57] <topi`> so it didn't work the way you described...
[20:58] <jimbaker> topi`, ahh, it should
[20:58] <jimbaker> i suppose it could
[20:58] <topi`> try it yourself;)
[20:58] <jimbaker> no, i accept your analysis
[20:58] <jimbaker> but i'm thinking of what's going on here
[21:01] <jimbaker> topi`, i looked through the supporting code
[21:01] <jimbaker> we should modify that support
[21:01] <jimbaker> to make it more regular. should be straightforward, simply use current python property support
[21:02] <jimbaker> sort of a low priority item right now??? but definitely doable
[21:03] <jimbaker> this would make raymond hettinger very happy however
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[21:06] <topi`> I bet :)
[21:08] <jimbaker> anyway, i just added to my infinite todo list
[21:16] <jimbaker> topi`, i have to finish generating an assignment for a students, so they have something to keep busy on and/or learn cool stuff
[21:16] <jimbaker> but after that, will turn back to that blog post/clamp refactor
[21:19] <jimbaker> btw, i do plan to add at the beginning support for vararg constructors; i will then think about annotation support
[21:20] <jimbaker> topi`, does quartz need support for annotations, btw? because if it does, that would be an excellent test case for me
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[22:36] <jimbaker> annotations look very useful in quartz: http://quartz-scheduler.org/documentation/quartz-2.x/new-in-quartz-2
[22:37] <jimbaker> so definitely want to add support in clamp sooner than later
[23:15] <jimbaker> oh, i have a crazy idea for doing this. darn, this is much more fun than putting together an assignment ;)
[23:16] <jimbaker> i thought previously of doing this with import hooks (import clamp.magic to enable?). now i have a good idea of exactly what that would look like
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