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Simplification via custom protocol handlers: cvs://server/project, zope://foo ?
by Craeg K Strong 01 Apr '02

01 Apr '02

Hello: I am the author of the CVSFile product, available at http://www.zope.org/Members/arielpartners/CVSFile I am thinking about implementing a new design, and wanted to get some feedback from the list first (perhaps others have tried this approach?) Here is a description of our problem: ExternalFile is a Zope product that behaves like a DTMLDocument/method/etc but points to a file outside of ZODB for its content (sort of like a symbolic link) CVSFile inherits from ExternalFile, where the content file is stored in a CVS sandbox. It features buttons to do updates, commits, etc. So far, so good. The problem is that we are working on a third Zope product whose instances represent XML documents that automatically render themselves to HTML (or whatever) when referred to. You edit the XML content using ZMI or whatever, but when you navigate there, you see the resulting web page/PDF/etc. We are going to call it something along the lines of XSLTFile because it uses XSLT to do the conversion. Here's the issue: the XML file that is the source of the transformation may or may not reside inside the ZODB. For example, we store most of our XML documents in CVS. But if revision control is not important (such as for one-off or throw-away documents) we keep them in ZODB. How did we do this? Well we had XSLTFile inherit from CVSFile. This is bad. What happens when we switch to some other revision control tool (like clearcase, subversion, sourcesafe)? Either you have multiple classes like "CVS-XSLTFile, Clearcase-XSLTFile, etc." or a single class that knows about every possible version control system. yuk. Clearly, inheritance and mixins are not the answer. Instead we want delegation. How to do this? One idea is to register a custom protocol handler with python, using urllib2. See: http://www.python.org/doc/current/lib/module-urllib2.html install_opener() I am imagining the following. a new XSLTFile instance is created, pointing to a URL for its content. Here are some examples of URLs: cvs://myserver/myproject/my/file#VERSION-10 zope://foobar http://www.foo.bar/myfile In this way, the XSLTFile instance knows nothing about CVS or any other revision control system. Instead, it only knows about a URL, and the CVS protocol handler would know about how to retrieve files from CVS. We could create our own scheme where a query parameter would specify the sandbox name or something. The Zope protocol handler idea is interesting, and I haven't thought this all the way through yet. Could <dtml-var blat> be thought of as referring to "zope://blat" where the Zope protocol is the default and therefore omitted? The idea of unifying all object references through URIs is intriguing to me. (for more info, see REpresentational State Transfer: http://conveyor.com/RESTwiki/moin.cgi ) Comments? --Craeg

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REAL WORLD! 网上的真实机遇！
by None 01 Apr '02

01 Apr '02

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Re: [Zope] Having to keep typing "./start &"
by Lennart Regebro 31 Mar '02

31 Mar '02

From: "Douglas Carnall" <dougie(a)carnall.org> > If I am right, then this is an FAQ. Each time I answer it, I plaintively > wonder aloud why the -D flag would be the default, but I am generally > ignored. One reason is that without it, the server prints out nothing at all at startup, which is confusing to new users. To solve this two things need to be changed: 1. There need to be a possibility to set the error severity just like with stupid_log_file, even for printouts to stdoutput. Maybe the stupid_log_file could be made to be the standard way of logging, and it could log to stdout if no stupid_log_file was set? 2. The default level for stupid_log_file should be to print INFO and higher messages. Today the default is only to print PROBLEM and higher.

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Re: [Zope-dev] Medusa 0.5.1 maint release, planned for inclusion in Zope?
by Jeff Kowalczyk 30 Mar '02

30 Mar '02

[Chris] Does Zope 3 use Medusa at all? [Stephan] No. Shane rewrote all of the HTTP Server and I am writing right now the FTP server (which copies some of the Medusa code, but much is cleaned). We added interfaces and made it more component-based. [Jeff] That's good news about an interface refactoring, it was a little confusing researching the present customized version. My interest in (the Medusa revision) was to keep alive the idea of setting up hooks for developers to build support for other protocols (IMAP, NNTP, Jabber, SMTP, SMS etc.) in a standard, configurable way in Zope3. Will your rewritten components form on a general-purpose server framework like Medusa? Ideally, the support would be as easily added as other 3rd party Zope3 product/components, inheriting from the base components you guys are writing now. The topic kind of thudded when I brought it up last week, but I think it is important to keep an open mind about it while Zope3 is still brewing. Interfaces to external mail and other servers is only part of it, since that makes workflow programming on the messages much less direct, and reduces the cross-platform flexibility of Zope deployments, where most extensibility is done in Python. Lots of *small* businesses need what MS Exchange offers, but can't afford it nor safely maintain its staggering complexity. As these python protocol implmentations crop up, I'd like to see Zope3 offer those writers a mature, cross-platform back-end to store their messages in, if they are willing to implement a few well-defined interfaces.

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OpenSSH configuration between ZEO clients & storage server
by Eric Roby 30 Mar '02

30 Mar '02

Anyone had any experience trying to secure the transactions between ZEO clients and a storage server??? Our shop is already using OpenSSH, I have read some introductory information about OpenSSH. It is just not clear to me the level of effort required to implement this or if implemented, will the additional overhead further exasperate the potential for unresolved conflict errors??? Any thoughts... Eric

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Re: [Zope-dev] zope CVS on cygwin (will sum)
by Didier Georgieff 30 Mar '02

30 Mar '02

On 30 Mar 2002, at 19:10, "Chris McDonough" <chrism(a)zope.com> wrote: > But now i have a problem with ./start wich seems to be related to > some rebase/adress for python under cgwin according to > > http://aspn.activestate.com/ASPN/Mail/Message/python-list/951044 This was the solution. I'll make a how-to as promised. Again thanks Chris.

1 0

zope CVS on cygwin (will sum)
by Didier Georgieff 30 Mar '02

30 Mar '02

Hello, 1 - I'm trying to compile the latest Zope2 CVS fron today on cygwin. 2 - I've done all is described in ChrisMcD post : http://zope.nipltd.com/public/lists/dev-archive.nsf/0a8715d5f3c7b6a3802568c… (get python 2.1.1, src, compiel with thread, create a fresh FCNTL.py). 3 - When i do python wo_pcgi.py i get this error. gcc -shared -Wl,--enable-auto-image-base ./zlib.o ./adler32.o ./compress.o ./cr c32.o ./gzio.o ./uncompr.o ./deflate.o ./trees.o ./zutil.o ./inflate.o ./infbloc k.o ./inftrees.o ./infcodes.o ./infutil.o ./inffast.o -L/usr/local/lib/python2. 1/config -lpython2.1 -o ./zlib.dll make: *** No rule to make target `../Components/initgroups/initgroups.c', needed by `initgroups.o'. Stop. Traceback (most recent call last): File "wo_pcgi.py", line 45, in ? File "wo_pcgi.py", line 33, in main File "/cygdrive/d/Zope/CVS-Files/Zope/inst/build_extensions.py", line 30, in ? make('lib','python') File "/cygdrive/d/Zope/CVS-Files/Zope/inst/do.py", line 63, in make do('make') File "/cygdrive/d/Zope/CVS-Files/Zope/inst/do.py", line 32, in do if i and picky: raise SystemError, i SystemError: 512 ? is is due to a bas processing from my side ? ? is this due to a 2.1.1 python instead of 2.1.2 ? ? does the latest Z2 cvs needs some python patch ? Any clue will be more than welcome. When solved, I'll summarize that "Z2 cvs on cygwin" as a how-to. Thanks a lot in advance.

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Medusa 0.5.1 maint release, planned for inclusion in Zope?
by Jeff Kowalczyk 30 Mar '02

30 Mar '02

>From the Daily-URL: Andrew Kuchling: Medusa 0.5.1 released: "Medusa is a framework for writing asynchronous socket-based servers. It was originally written by Sam Rushing. However, no new releases have been made in about a year. I've therefore taken the original Medusa package, and reformatted the code, removed various outdated modules, ran PyChecker over it, wrote a Distutils script, and made a new maintenance release of Medusa." [Jeff] Will this version of the Medusa code be making its way into the Zserver core for the 2.5.x maintenance releases, or the 2.6 timeframe?

2 1

Page Templates: handling ick from MS applications
by Christopher N. Deckard 29 Mar '02

29 Mar '02

This has been submitted to the collector... I have also uploaded a sample patch. http://collector.zope.org/Zope/321 We have set up a PUT_factory to create Page Templates out of files PUT through WebDAV with a content type of 'text/html'. This works all fine and dandy until we run across bad HTML from MS Office XP applications (specifically PowerPoint XP). The problems are in TAL/HTMLParser.py. An example of badness:  This causes the Page Template renderer to break. I have a sample patch wich seems to work. Some of the new stuff should probably be renamed as it slams MS. :-) Another error occurs due to a bug in TAL/markupbase.py. The call to error() when we have a bad declaration name to scan. Two parameters were being passed to self.error and it only takes one (plus self). Attached in a file are two patches which seem to fix the problems. I'll also include the PUT_factory that I'm using in case you want to test with it. If you need a sample PowerPoint XP file, let me know and I can put one up for you. -Chris -- -------------------------------------------------------------------- Christopher N. Deckard | Lead Web Systems Developer cnd(a)ecn.purdue.edu | Engineering Computer Network http://www.ecn.purdue.edu/ | Purdue University ---- zlib.decompress('x\234K\316Kq((-J)M\325KM)\005\000)"\005w') ---

1 0

How to actually submit contributions for 2.6?
by Brad Clements 29 Mar '02

29 Mar '02

I have two pending suggestions on the wiki. I'm ready to submit code/patches. What is the actual mechanism I should use? Just put patches into bug tracker? Brad Clements, bkc(a)murkworks.com (315)268-1000 http://www.murkworks.com (315)268-9812 Fax AOL-IM: BKClements

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