Mailman 3 June 2006 - Twisted-web

Test
by Philippe Lafoucrière 05 Aug '21

05 Aug '21

Hi all just a test

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New WebDAV implementation that can run on web2
by Michael Robinson 28 Jun '06

28 Jun '06

My project, NoDAV (http://nodav.python-hosting.com/), is a framework for developing WebDAV applications in Python. NoDAV includes an example WSGI server running on web2. NoDAV is not tied to any specific web framework and should integrate integrate into any HTTP1.1 framework with ~100-150 of lines of NoDAV related code. I don't know if advantagers there would be a major advantage to implementing NoDAV directly on top of the Twisted API instead of WSGI, but it would be a trivial task for anyone familiar with Twisted (which I'm not).

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Mailing list for Formal
by Matt Goodall 28 Jun '06

28 Jun '06

Hi, I've been getting quite a few requests for help with Formal for some time now so I (finally!) got round to creating a mailing list for it. It's better that help requests go to more than just me because I don't always get enough free time to answer questions. I used Google Groups. I know it's not perfect but, hey, it's easy to set up. URL: http://groups.google.com/group/formal-nevow Email: formal-nevow(a)googlegroups.com I haven't changed the group much from the default so anyone can view the group but only members can post and it's unmoderated. If anyone has strong objections to that configuration then I'm willing to listen, but it seems reasonable and will hopefully avoid a bit of spam. So, I hope to see a few members there soon (I'm going to invite a few people I know of to encourage things along). Cheers, Matt -- __ / \__ Matt Goodall, Pollenation Internet Ltd \__/ \ w: http://www.pollenation.net __/ \__/ e: matt(a)pollenation.net / \__/ \ t: +44 (0)113 2252500 \__/ \__/ / \ Any views expressed are my own and do not necessarily \__/ reflect the views of my employer.

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guard, mind and component questions
by Dan Aronson 28 Jun '06

28 Jun '06

I've been using nevow on a project and I think I'm doing something cleaner than is in all of the examples (and the examples) that I've seen on the net, so I'm wondering if I'm missing something. All of the examples that keep state do it in the component of the guard session. For my code I'm instead keeping state in the mind. I find this better for two reasons: 1) I don't have to create an interface class for my state 2) I don't have to make sure that my state gets cleaned up after logout (or new login), since the mind factory gets reinstanced anyway, and Ican just rely on python garbage collecting the old state information. Of course when thinking about it, my assumption is that mind is called "mind" for this very reason. Could any of you experienced nevow users/implementors tell me if I'm missing something? --dan

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Re: [Twisted-web] large file upload in web2 (was Re: http.HTTPFactory(site) equivalent in web2.0.2?)
by Lenny G Arbage 27 Jun '06

27 Jun '06

David Reid wrote: > Ok, while True is bad and blocking. I > think you should look at > twisted.web2.static.FileSaver, if it > doesn' perform a function close enough > to what you want it is a good example > of the right way to handle uploaded > files as far as reading. (Hint it's to > use things in the twisted.web2.stream > library) I expect your problems will > go away Thanks for pointing this out. The stream classes look really cool. So I replaced my bad 'while True' blocking code with the following: filestream = stream.FileStream(file) dest = os.path.join(SAVEDIR,filename) destfile = os.fdopen(os.open(dest, os.O_WRONLY | os.O_CREAT | os.O_EXCL, 0644), 'w', 0) stream.readIntoFile(filestream, destfile) And this works great -- but only for files smaller than 10M. It looks like files >10M still produce the hang -- same behavior as before. > but you might still want to > file a documentation enhancement bug > stating that how to do this kind of > thing is completely undocumented. I'll file tickets for both of these, to try to stop cluttering the mailing list with these issues. Thanks, Lenny __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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large file upload in web2 (was Re: http.HTTPFactory(site) equivalent in web2.0.2?)
by Lenny G Arbage 27 Jun '06

27 Jun '06

> Did you create a bug about it when you found it in > 0.1? If not could you? Because I didn't know about > any such issue, and I'm guessing neither did > anyone else. Assign it to me and I'll look into it > this evening after work (any code you have to > reproduce such an issue would be helpful it doesn't > necessarily have to be in the form of a unittest > but if you can do that it'd be awesome.) I just found it yesterday (in 0.1) and thought I should upgrade to 0.2 before bugging anyone about it. I'd be happy to create a bug, but I have no idea how to do that ("TICKET_CREATE privileges are required to perform this operation", and I haven't been able to get myself over the wall of "where are the instructions on getting an account or gaining those privileges?") Here, though, is a simple example illustrating the problem: #!/usr/bin/python import os from twisted.internet import reactor from twisted.web2 import server, http, resource,\ channel from twisted.web2 import http_headers, responsecode from twisted.web2 import iweb SAVEDIR = "/tmp" READSIZE=8192 class UploadFile(resource.PostableResource): def render(self, ctx): request = iweb.IRequest(ctx) filename = request.files['filename'][0][0] file = request.files['filename'][0][2] dest = os.path.join(SAVEDIR, filename) destfile = open(dest, 'wb') tot = 0 while True: buf = file.read(READSIZE) tot = tot + READSIZE print "reading %d..." % tot if buf == '': break destfile.write(buf) destfile.close() file.close() msg = "saved %s to %s" % (filename, dest) print msg return http.Response(stream="%s" % msg) class Toplevel(resource.Resource): addSlash = True def render(self, ctx): return http.Response(responsecode.OK, {'content-type': http_headers.MimeType('text', 'html')}, "Hello") child_uploadfile = UploadFile() if __name__ == "__main__": site = server.Site(Toplevel()) reactor.listenTCP(1080, channel.HTTPFactory(site)) reactor.run() Run this script, then upload a file to it with the client of your choice. Here is an html form which you can use to do that: <html> <form action="http://localhost:1080/uploadfile" enctype="multipart/form-data" method="post"> filename: <input type="file" name="filename"> <input type="submit" value="submit"> </form> </html> You should be able to upload files smaller than 9M without any problem, and files larger than 10M not at all. I can send you an httplib client as well, but at least this should be enough to get you started. I'll go try again, now, to figure out how to get this filed properly in Trac (and maybe even as a unittest!). Thanks! Lenny __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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OSS Nevow blog ?
by Thomas Raschbacher 27 Jun '06

27 Jun '06

Hi i was just wondering if there's an existing nevow blog available (open source). otherwise i'll have to write it myself (problem is lack of time though ..) regards, Thomas "LordVan" Raschbacher P.S.: please CC me directly as i'll prolly forget to look in this mail folder ;) -- -----BEGIN GEEK CODE BLOCK----- GCS/CC/E/M/MU/S d- s: a--- C++++(++) UL++++ P+ L++++ E W+++ N+++ o-- K w-- O M-- V- PS+ PE-- Y++ PGP+++ t+++ 5+ X- R tv b++++ DI- D+ G++ e-->+++++ h-- !r z- ------END GEEK CODE BLOCK------

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Bay Area Twisted sprint.
by David Reid 26 Jun '06

26 Jun '06

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello there, I'm attempting to think about possibly organizing a Twisted sprint (focus on closing bugs) in the San Francisco/Bay Area for mid to late July. I know there are quite a few Twisted committers who are in the area and I've approached some of them to gather preliminary information regarding availability and interest. There are also some people in town for the summer for various reasons who've expressed interest. So this is an open invitation to every on twisted-python and twisted-web who is in the bay area (or willing to travel to the bay area) for a weekend sprint. I need a rough approximation of how many people will actually be able to make it so that I can attempt to locate a place to hold the sprint. So if you're interested email me with your availability for the weekends of the 15-16, 22-23, 29-30. Basically I'll take the weekend with the most available participants and start fishing around for a location. Alternatively if you would like to host the sprint at your large private estate or successful corporate offices you can contact me as well with your preference for any of the above dates and some details about the facilities you can provide. (Close proximity to a caffeine dispensary and reliable unrestrictive internet access are a must. Comfy chairs a plus.) - -David Reid - -- "Usually the protocol is this: I appoint someone for a task, which they are not qualified to do. Then, they have to fight a bear if they don't want to do it." -- Glyph Lefkowitz -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFEoGzIrsrO6aeULcgRAlGmAKCfO9zBU/2UV5mIMXfNHRo7jlyXrACfSDbB +TQMSPD7uwLnSDV1Ou2H/Qc= =cWIj -----END PGP SIGNATURE-----

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Re: http.HTTPFactory(site) equivalent in web2.0.2?
by Lenny G Arbage 26 Jun '06

26 Jun '06

> channel.HTTPFactory(server.Site(rootresource)) is the > proper way, and > I've just verified that it works on web2 0.2 (it's not > 2.0.2.) Without seeing the implementation of > TopLevel I don't have a clue what the problem might > be, except for some error on your part. It looks like it actually ended up being changes in the format of request.files that tripped everything up. With your tip, I was able to get it working again. I'm now running into file size limitations, however. It looks like when a file larger than about 10M is uploaded via a post form, the transfer hangs. On the client side, roughly 560K is written before the socket is blocked and the client can no longer send. On the server side, the post never gets into my render() method. Files of size 9M and smaller work fine. While the big file client's write is blocked, other clients can still access the server and upload [small] files. I get the same behavior whether I use Firefox or python's httplib as the client. This behavior isn't new in 0.2 -- I upgraded from 0.1 hoping it would be fixed. I'll see if I can't dig in and find where this is happening, but if you have any pointers, fabulous. Thanks, Lenny __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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http.HTTPFactory(site) equivalent in web2.0.2?
by Lenny G Arbage 26 Jun '06

26 Jun '06

I previously used the following code with TwistedWeb2 0.1: site = server.Site(Toplevel()) reactor.listenTCP(1080, http.HTTPFactory(site)) reactor.run() This no longer works in 2.0.2. If I replace http.HTTPFactory with channel.HTTPFactory or channel.http.HTTPFactory, I don't get errors, but I get "405 Method Not Allowed" for any URL Resource I try to visit. What is the proper way to do the above in 2.0.2? Thanks, Lenny __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

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