Older blog entries for thayer (starting at number 4)

MoinMoinWiki I'd like to mention a bit about WikiWebs:

I've been using MoinMoinWiki for several months now at work. The size of the Wiki, being used actively by about 6 people, has finally reached a point where the organization is a problem. But then I discovered two really great things 1) The CategoryCategory page, and 2) Template feature. Boy, this Wiki is a nice balance of powerful and simple. Really worth it's salt. At first I didn't think much of it, but I'm really starting to appreciate it.

I highly recommend everyone try the MoinMoinWiki which can be found at this SourceForge page. For those unfamiliar with WikiWikiWebs, here's some of the salient points, based on my experience with MoinMoinWiki:

  • The editing style is simple text, so you don't need to do very much to create okay looking docs. For example, in MoinMoin you can get a large headline with "== Headline ==" and if you start some lines with "1. " it turns that into a numbered list. There are a bunch of these, but it's quite easy to get started.

  • Linking between documents is automatic. You use a WikiWord, and it's automatically highlighted as a link. A WikiWord is two or more words conjoined at the hip and differentiated with capitalization. Eg. WikiWord is a WikiWord, CharlesThayer is a WikiWord, and so are AgentFunctionalSpec, MoonRakerReleaseNotes, XmlLinks, RpcLinks, BestQuotes, WalnutCreekPhoneList, etc.

  • A Wiki let's anyone create very unstructured documents. People can format short documents quickly, and migrate them to fancier more official documents when they become large enough.

  • The web interface makes it possible to do this from just about anywhere without the overhead of an application plus version control. But it still provides very readable docs and the ability to track changes.

  • In MoinMoinWiki you can turn off anonymous updates, or allow anyone to make changes. The whole notion behind WikiWebs is that folks can make updates immediately and easy. Also, see differences between versions is quite easy.

  • MoinMoinWiki is a fairly simple code base of python which doesn't take much effort to install.

  • In relation to the World-Wide Web a wiki is: (a) editable by everyone (b) quick (c) let's you link easily out of a page, and trivially see links *to* the page you're looking at.

Let me describe the two features of MoinMoinWiki that I mentioned earlier:

  • CategoryCategory: To tag a document as belonging to a category, one simply puts a link to the Category page. If I have a category for collections of web links, I create a page called "CategoryLinks". Then on the pages which I want under this category, I put a link to "CategoryLinks". From this page, I include the list of all pages pointing to it. Voila, the CategoryLinks page is an index for any page that refers to it. If I wanted to create a page of web references about XML, for example, I'd create XmlLinks and put a mention of CategoryLinks at the bottom. Note that the CategoryLinks page would include a reference to CategoryCategory so that it appears on that page (and vice versa).

  • Templates: Naming a page with Template at the end results in a Template. When you go to create a new page, you're given a list of templates to choose from. In this way, you can loosely specify the structure for different types of documents. For the Links example above, I'd create LinksTemplate and at the bottom I'd have the text "Part of: CategoryLinks". This way any page about links would auto-magic-ally on the links page CategoryLinks

For more advanced features there's a perl wiki called TWikiWeb which I haven't looked into yet. It seems to support some sophisticated structured data (ie. fill-out forms).

I'm wondering if a link to perlmonks will work here: perl monks. Now if I could find a python monks site, I'd be set...

Disturbing happenings at OSDN (sourceforge and freshmeat) are making me antsy.

My fondness for Jabber is continuing to grow. It's really smart in subtle ways. I think it makes a good general purpose monitor for events happening everywhere. If any shell script could report a message to a jabber channel for me across the whole network, then managing a lot of machines proactively would be much easier. Sort of personalized syslog... Problems are issues around unicode and internationalization, and embedding XML messages for supporting JAM (jabber as a middle-layer).

Things missing or things which I long to find a better version of:

  • Ad manager for web sites.
  • Wiki web (using MoinMoin WikiWeb in python)
  • Blogger
  • Web email system based on imap/pop for vanity accounts (check.com)
  • Map to web integration (mapit looks good)
  • Web based list manager (majordomo, gnu mailman okay)
  • XML diff
Python Networking

I've discovered several important deficiencies in some python networking classes. The problem is in the structure of both medusa/asyncore and the regular python socketserver plus basehttpserver.

Namely a request object can't declare that (a) it doesn't want to handle the request and the server should continue (b) the server should stop right there.

Both these actions are important for fork()ing. If the request handler forks, you have two processes that both want to reply to the same socket. There libraries are structured to support always forking or threading, but not a mixture of either determined within the request handler itself.

Also, although the medusa base class is smart enough in asyncore and asynchat to handle a special ExitNow exception, the HTTP server classes built on top are rude and catch all excepts. Someone using these can't raise an ExitNow because it's returned as a 500 or other HTTP error.

These problems have made it impossible for me to build a workable XMLRPC/SSL server which forks. Alas, I'm fairly happy with most of the base classes / modules. I'm going to have to add some lines to these packages and send out patches.

Much progress to report though none of it particularly technical. Moved, changed jobs, hired some developers, working hard, exploring, dealing with WTC bombing fall-out effects.

On the technical side: using jabber server extensively for middleware messaging layer, lots of python going on, really like the MoinMoin Wiki, couldn't get samba to compile under cygwin though it should be doable (it's probably not worthwhile), Jarl/everybuddy are alright jabber clients for Linux, Windows registry entries can have duplicates or null key/values.

Had some new thoughts on category trees. Greater than, less than for a path or tree translates to childof, parentof. There's a really simple relationship between trees and strings which makes lots of algorithms constant order in surprising ways. [more on that later]

Upgraded to reiserfs and I'm a happy camper. Got some more IDE drives to mount and a 2.4.0 kernel to finish compiling.

New Advogato Features

New HTML Parser: The long-awaited libxml2 based HTML parser code is live. It needs further work but already handles most markup better than the original parser.

Keep up with the latest Advogato features by reading the Advogato status blog.

If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!