June 2000 - Zope-Dev

Announce: ZScheduler alpha 0.0.5
by Loren Stafford 14 Jun '00

14 Jun '00

I found some time to do a little work on ZScheduler. The result is alpha version 0.0.5. You can get it at http://www.zope.org/Members/lstaffor/ZScheduler. It appears fully functional on Win98 with Zope versions 2.1.4 and 2.1.6 (with patch to Client.py). But this is still alpha software, so be careful where you install it. I've made no changes to make it work on Unix. (I don't have a Unix development environment at my disposal.) Prior versions caused Zope to become inoperative while installed. I would appreciate someone's confirming whether 0.0.5 doesn't work on Unix either. -- Thanks -- Loren

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RE: [Zope-dev] CVS empty Extensions directory
by Brian Lloyd 13 Jun '00

13 Jun '00

> I keep getting complaints about a missing CVS directory inside > Extensions (a directory recently added). Can we either add > the null CVS > dir or remove Extensions from the CVS tree? > -- > Robin Becker It was added on purpose - did you do a cvs update -d ? Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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Re: [Zope-dev] ZCatalog text index search bugs?
by Dieter Maurer 13 Jun '00

13 Jun '00

R. David Murray writes: > I am very confused. > > I'm looking at the SearchIndex source under 2.1.4 (2.1.6 seems to be > the same). In Lexicon.py the 'query' method defines the default_operator > to be 'or'. I can't see that TextIndex overrides this when it calls > it. > > But the response to PR 1141 (against 2.1.6) in the collector says: > > The TextIndex search does an AND, not an OR, of the search > words: if you ask it to find "foo bar", it returns only > objects matching *both* "foo" and "bar", rather than object > matching *either* "foo" or "bar" (which Jason expected). This is definitely not the case! > Indeed, if you do a search that includes a word that is not on an > item, the item is not returned. So how is that working? That is a bug I discovered and analysed yesterday. The index lookup is done by "index[word]". This raises a KeyError exception, if "word" is not in the index. The exception aborts the search; it returns without hit. The behaviour is correct for "and" but of cause wrong for "or". After I had gotten several complaints about reporting bugs already fixed in CVS, I checked out the CVS today. The relevant code has undergone quite a few modifications. I will take some time to see, if the bug remains. Today, it is already too late. Maybe, I will see tomorrow. > .... > So I think 'or' searching is broken, and that text indexes being > a default 'and' search is just an accident <grin>. You are right! > .... > (*) I recall reading that the 'near' operator, which is used if > the splitter breaks up a word in the search string, is not really > supported and that the 'and' operator is used instead.) The "near" operator in 2.1.6 raises an exception. This means, no hits. I have posted a patch some days ago that fixes near searches, except for objects that can not be stored in ZODB like LocalFS objects. For such objects, it uses an "and" to approximate "near". > .... > If I can reproduce this in 2.2.0b I'll file it in the collector. I will watch any posts from you. It is not necessary that we do the same work. Dieter

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Re: [Zope-dev] More useful CatalogAware class?
by Dieter Maurer 13 Jun '00

13 Jun '00

Martijn Pieters writes: > On Mon, Jun 12, 2000 at 01:12:33PM -0700, Michel Pelletier wrote: > > ... CatalogAware successor ... > > Very interesting indeed. > > Is the CatalogAware mixin in the future going to move towards Tres' Observable > pattern? > > After initial notification of the set of catalogs (or other interested > objects, or a generic notification manager) at creation time, the object will > only have to call the 'notify' method, with the appropriate event name. In > fact, I think all stock Zope objects should in the nearby future use the > Observable pattern to advertise events like this. If one views "creation" and "deletion" as operations on the container rather than the element then the observer pattern can be used for creation and deletion, too. Of cause, the notification should contain a reference to the created/deleted object. Dieter

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RE: [Zope-dev] Problem with XML in Zope 220b1
by Brian Lloyd 13 Jun '00

13 Jun '00

> I have a lot of Chinese XML-files stored in Zope. The > internal encoding is > UTF-8. Everything was fine in 214, 216 and 220a1. Now with 220b1, some > characters are (apparently?) randomly turned into lt;, gt; > and the like. Now > this looks like some unwanted HTML escaping, but the leading > '&' is missing > and the characters are definitely all in the range greater > 127 (this is a > property of UTF8), so there is no direct relationship to the > codepoints of > >, < and co. > > Any ideas what could have gone wrong here? Yes - during the alpha period we got a bug report concerning the fact that Netscape browsers honor the windows "extended Latin-1" characters \213 and \233 (which are < and >). That means that if you don't filter those as a part of html_quote 'ing then some Netscape versions are open to the same sort of script-kiddie attacks that they would be if the HTML was not quoted at all :( I'm not quite sure what the right answer is here. How are you using the html_quote format in your application? Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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Document
by howardchang＠263.net 13 Jun '00

13 Jun '00

who can tell me where i can get documents or descriptions about Btree,Intset,IOBtree,OIBtree module thanks _____________________________________________ Ò»Â·ÉÏÓÐÄã£¬¿àÒ»µãÒ²ÔžÒâ£¡ --ÎªÄãÏ²°®ÓëÖ§³ÖµÄ263Ê×¶ŒÔÚÏß£šhttp://www.263.net£©Í¶Ò»Æ±£¡ ÎÒÒªÍ¶Æ±£¡£šhttp://fsurvey.cnnic.net.cn/survey/index.html£©

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Zope`s global.asa
by Thomas Weholt 13 Jun '00

13 Jun '00

Hi, This might be a stupid question, but I`ll remain stupid at least until someone answers so ... Is there a global.asa counterpart in Zope, a place to put stuff that is or should be accessable in the entire site, like database-connections etc.? I was forced ( it was terrible, just terrible I tell ya!! ) to work in ASP on MS IIS ( it just gets worse ) and the global.asa didn`t seem like a bad idea. But as mentioned earlier, this might be in Zope allready. Thomas

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CVS empty Extensions directory
by Robin Becker 13 Jun '00

13 Jun '00

I keep getting complaints about a missing CVS directory inside Extensions (a directory recently added). Can we either add the null CVS dir or remove Extensions from the CVS tree? -- Robin Becker

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RE: [Zope] Zope 2.2 beta 1 released
by Brian Lloyd 13 Jun '00

13 Jun '00

> Trying to run the b1 on Windows, I get the following: > > C:\Program Files\Z220b1>"C:\Program > Files\Z220b1\bin\python.exe" "C:\Program > Fil > es\Z220b1\z2.py" -D > Traceback (innermost last): > File "C:\Program Files\Z220b1\z2.py", line 524, in ? > import ZServer > File "C:\Program Files\Z220b1\ZServer\__init__.py", line 87, in ? > from medusa import max_sockets, asyncore > ImportError: No module named medusa > > > Throwing an empty __init__.py file into $Zope/ZServer/medusa > solved the > problem for me. Ack - apparently something in the win installer thinks that empty files are not worth preserving :( Note that I've tweaked this and re-uploaded the win32 beta. If you've already downloaded it, the above solution is fine (just create an empty file named __init__.py in your ZServer/medusa directory). Brian Lloyd brian(a)digicool.com Software Engineer 540.371.6909 Digital Creations http://www.digicool.com

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Request for comments: Directory storage
by Petru Paler 13 Jun '00

13 Jun '00

Hello all, You probably saw my yesterday post with the first alpha of ReiserStorage. One of the questions that people tend to ask about it is wheter they can use it without reiserfs. There are two problems with not using reiserfs: 1. ReiserStorage (now renamed to DirectoryStorage) stores each object in a separate file and *all* the files in a single directory. This was done in order to let the filesystem what it was meant to do: store and retrieve files quickly. While reiserfs is *extremely* good at this (it uses a btree to store directory entries), most other filesystems do linear searches when finding a file so performance is very bad when you have many files in a single directory. This problem can be solved by splitting files into multiple directories when not using reiserfs. This would add a little overhead but it is tolerable. 2. Waste of space. Typical block-allocation filesystems like ext2 and FAT will waste alot of space in the usage pattern of DirectoryStorage. ReiserFS packs small files together in the btree, so it solves the problem, but I have no ideea how this could be fixed easyly on the other fs's. Comments ? Suggestions ? PS: a new DirectoryStorage release will be done today, with bugfixes and new features. -Petru

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