Mailman 3 January 2007 - Twisted-web

Progress on client POST methods
by Ross Burton Jan. 7, 2007

Jan. 7, 2007

Hi, I'm writing a Flickr upload tool[1] and would like to be able to show the progress of the image upload. Images are uploaded via HTTP POST: from twisted.web import client ... return client.getPage("http://api.flickr.com/services/upload/", method="POST", headers=headers, postdata=form) where form is the encoded title/tags/image data. Is there a way to get progress information from twisted.web.client? If I'm uploading 4M images the upload takes some time to complete, so I'd like to be able to have a progress bar. Also, should I be using twisted.web2.client now, or is it still under development? Thanks, Ross [1] The library is at http://burtonini.com/bzr/flickrpc/ -- Ross Burton mail: ross(a)burtonini.com jabber: ross(a)burtonini.com www: http://www.burtonini.com./ PGP Fingerprint: 1A21 F5B0 D8D0 CFE3 81D4 E25A 2D09 E447 D0B4 33DF

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performance of web2
by Manlio Perillo Jan. 7, 2007

Jan. 7, 2007

Hi. I have begin to play with twisted.web2. The first thing I have done is a comparative test against Nevow. The Nevow code: class Main(object): implements(inevow.IResource) def renderHTTP(self, ctx): data = "hello world" * 1024 return data def locateChild(self, ctx, segments): return self, () and twisted.web2 code: class Main(object): implements(iweb.IResource) def renderHTTP(self, req): data = "hello world" * 1024 return http.Response(stream=data) def locateChild(self, request, segments): return self, server.StopTraversal I have used ab2 from apache2. With n = 100 and c = 1: - nevow: 1062 req/sec - web2: 980 req/sec With n = 500 and c = 50 - nevow: 1231 req/sec - web2: 1101 req/sec (plain twisted.web is a bit faster: 1323 req/seq and 1793 req/seq) This is not a problem (and maybe the tests are not so accurate), but I would like to known if there are still some areas that can be optimized in twisted.web2 or the development is stable. Thanks and regards Manlio Perillo

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web2 locateChild
by Manlio Perillo Jan. 7, 2007

Jan. 7, 2007

I have just noted that web2 locateChild has no documentation on how childrens are searched (why just not copy it from Nevow?). Moreover in Nevow, locateChildfirst looks for a 'children' attribute (a dictionary). Regards Manlio Perillo

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Directory listing limitations
by Manlio Perillo Jan. 7, 2007

Jan. 7, 2007

Hi. I do not if this is a limitation or a feature but: 1) static.File shows hidden files 2) There is no link to the parent directory This happens for both web2 and Nevow. Manlio Perillo

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[Nevow] newflat
by Manlio Perillo Jan. 7, 2007

Jan. 7, 2007

Hi. I have found this code: http://divmod.org/trac/browser/sandbox/dialtone/newflat But, again, this is 5 months old. What's the problem? I can offer my contribution but I need to know if there is some migration plan for Nevow. As an example, you can create a nevow2 project, or just add a nevow subpackage in twisted.web2. Please, let me know. Manlio Perillo

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SCGI support in Web2
by Mars Agliullin Jan. 4, 2007

Jan. 4, 2007

Hello, Listers! Could anyone briefly summarize current status of SCGI support in twisted.web2? What works well, what doesn't, what improvements are needed, what are the future directions in this area, etc. In particular, I'm interested in SCGI authentication and a current point of view on a way to implement it. There are some remarks in ticket #1300, but they were made quite long ago. Has anything changed since then? -- Best regards, Mars Agliullin

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[Nevow] again on data directive
by Manlio Perillo Jan. 4, 2007

Jan. 4, 2007

To put it simple, I would like to have this feature: <div n:data="xxx" n:render="yyy" /> def render_yyy(request, tag): assert tag.data == 'xxx' That is: data directives are only used to pass data from the template to the renderer. Is this a good idea? Now what I can do is: <div data="xxx" n:render="yyy" /> def render-yyy(request, tag): assert tag.attributes.pop('data') == 'xxx' Thanks and regards Manlio Perillo

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Re: Fwd: [Twisted-web] [Nevow] again on data directive
by Manlio Perillo Jan. 4, 2007

Jan. 4, 2007

sifu ha scritto: > hmmmm... couldn't send it to the list. > > ---------- Forwarded message ---------- > From: sifu <lists(a)0xx0.net> > To: "Twisted Web World" <twisted-web(a)twistedmatrix.com> > Date: Thu, 4 Jan 2007 13:28:46 +0100 > Subject: Re: [Twisted-web] [Nevow] again on data directive > with the current nevow you can do: > > <div n:render="yyy xxx" /> > > def render_yyy( self, argument ): > def _( ctx, data ): > assert argument == 'xxx' > return _ > > but some nevow developers don't like the feature and want to get rid of it. > The problem with the current implementation is that data directives are handled by the Nevow rendering machinery (with object adaptation). I'm proposing that data directive must be handled by the user. Here is an example: <ul n:render="list"> <li n:data="x" n:render="item" /> <li n:data="y" n:render="item /> </ul> def render_list(request, tag): request.data = {'x': 1, 'y': 2} return tag def render_item(request, tag): item = request.data[tag.data] return tag[item] Without data directive I have to do: <ul n:render="list"> <li n:pattern="x"><n:slot name="value" /></li> <li n:pattern="y" /><n:slot name="value" /></li> </ul> def render_list(request, tag): data = {'x': 1, 'y': 2} for key, val in data.iteritems(): pat = tag.onePattern(key) pat.fillSlots('value', val) return tag In this example, using only patterns and slots is easy (and I do not have to store data on the request object), but I'm not sure this will be the same with a more complex template. I will try to do same tests. Regards Manlio Perillo

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[ANN] nadbapi
by Manlio Perillo Jan. 3, 2007

Jan. 3, 2007

I have written a small package for the integration of SQLAlchemy with Twisted. The project is hosted at: https://developer.berlios.de/projects/nadbapi/ I have implemented a custom Pool, Engine and MetaData to allow full integration. The project is still a pre release. Regards Manlio Perillo

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