I've had a few people contact me indicating interest in Cgiapp, and I've noticed a number of subscribers to the freshmeat project I've setup. In addition, we're using the library extensively at the National Gardening Association in developing our new site (the current site is using a mixture of ASP and Tango, with several newer applications using PHP). I've also been monitoring the CGI::Application mailing list. As a result of all this activity, I've decided I need to develop a roadmap for Cgiapp.
Currently, planned changes include:
$this->tmpl_assign('var1', 'val1'); $body = $this->load_tmpl('template.html');Becomes this:
$tmpl = $this->load_tmpl(); $tmpl->assign('var1', 'val1'); $body = $tmpl->fetch('template.html');OR
$tmpl = $this->load_tmpl('template.html'); $tmpl->assign('var1', 'val1'); $body = $tmpl->fetch();(Both examples assume use of Smarty.) I want to revert to this behaviour for several reasons:
If you have any requests or comments on the roadmap, please feel free to contact me.
The new weierophinney.net/matthew/ site is now up and running!
The site has been many months in planning, and about a month or so in actual coding. I have written the site in, instead of flatfiles, PHP, so as to:
I've written it using a strict MVC model, which means that I have libraries for accessing and manipulating the database; all displays are template driven (meaning I can create them with plain-old HTML); and I can create customizable applications out of various controller libraries. I've called this concoction Dragonfly.
There will be more developments coming -- sitewide search comes to mind, as well as RSS feeds for the blog and downloads.
Ever wonder what's keeping that device in use so you can't unmount it? It's happened to me a few times. The tool to discover this information? lsof.
Basically, you type something like: lsof /mnt/cdrom and it gives you a ps-style output detailing the PID and process of the processes that are using the cdrom. You can then go and manually stop those programs, or kill them yourself.
Okay, so that's actually direct quotes from the article. I took issue with it, immediately -- I use Smarty for everything I do, and the decision to do so was not done lightly. I have in fact been advocating the use of template engines in one language or another for several years with the various positions in which I've been employed; I think they are an essential tool for projects larger than a few pages. Why?
So, reading the aforementioned article really got my hackles up. However, it got me thinking, as well. One issue raised is that PHP can be used as your templating language. While I can understand why this might be desirable -- everything from load issues to flexibility -- I also feel that this doesn't give enough abstraction.
Using PHP seems to me to be inefficient on two fundamental levels, based on my understanding of The Pragmatic Programmer:
The author of the article also makes a case for teaching web designers PHP -- that the language is sufficiently easy to pick up that they typically will be able to learn it as easily, if not more easily, than a template language. I agree to a degree... But my experience has shown that web designers typically struggle with HTML, let alone PHP. (Note: my experience in this regard is not huge, and I'm sure that this is an exaggeration.) I find that it's typically easiest for me to give an example template, explain what the funny, non-HTML stuff can do, and let them go from there. Using this approach, they do not need to learn anything new -- they simply work with placeholders.
Still, I think the author raises some fine points. I wish he'd bothered to do more research into why people choose template engines and the benefits that arise from using them before simply outright slamming them. Of course, the article is also a bit dated; it was written over two years ago, and much has changed in the world of PHP and many of its template engines. I'm curious as to whether they would feel the same way today.
Me? My mind is made up -- the benefits, in my circumstances, far outweigh any costs associated. I'll be using template engines, and Smarty in particular, for years to come.
I'd read that you could get binary packages for gentoo, thus alleviating the need to compile everything. (Of course, then you lose some of the benefits of compiling everything, but you gain in speed...) Unfortunately, I mistook this with ebuilds, and never quite figured it out.
The key is to throw the -g flag:
% emerge -g gnumeric # which is like 'emerge --getbinpkg gnumeric'
I also learned how to update packages tonight:
% emerge sync # to sync your mirror with the gentoo mirrors % emerge --update portage # if necessary % emerge --update system # updates core system files % emerge --update world # updates all packages
I've had a bunch of problems with my new computer -- it uses ACPI, but if I load the ACPI modules, it won't boot; if I don't load them, I have to go through contortions to get the ethernet working, and it won't power down; and a bunch of other little stuff.
So, a few weeks ago, I thought, what the heck? Why not try Gentoo? I've been reading about it since it first came out, and I remember talking with Duane about it once, and it has a reputation for both being cutting edge and stable. Heck, even Wil Wheaton's endorsing it... it can't be all bad, right?
I had a few misstarts -- bad CDs, not quite getting how the chroot thing worked, problems with DNS (which I still don't understand; and Rob has them as well, so it's not just me). But once I got it installed... well, I'm impressed.
The thing about Gentoo is, it compiles everything from source. It's like Debian, in that it fetches all dependencies and installs those... but it's all source. So it's not exactly fast. But because everything is compiled, and because you setup C flags specific to your machine, what you get is incredibly optimized for your own machine. This 1.6GHz machine simply flies. And the memory usage just stays low.
I'd like to use it for my server... but I can't really take the server down at this point when it's making both my mom and myself money. But what a great system... I only wish I'd used it for the mail server at work.
After working on some OO classes yesterday for an application backend I'm developing for work, I decided I needed to create a BREAD class to make this simpler. You know, Browse-Read-Edit-Add-Delete.
At first, I figured I'd build off of what I'd done yesterday. But then I got to thinking (ah, thinking, my curse). I ran into the BREAD concept originally when investigating CGI::Application; a number of individuals had developed CGI::Apps that provided this functionality. I'd discarded them usually because they provided more functionality than I needed or because they introduced more complexity than I was willing to tackle right then.
But once my thoughts had gone to BREAD and CGI::App, I started thinking how nice it would be to have CGI::Application for PHP. And then I thought, why not? What prevents me from porting it? I have the source...
So, today I stayed home with Maeve, who, on the tail end of an illness, evidently ran herself down when at daycare yesterday, and stayed home sleeping most of the day. So, while she was resting, I sat down with a printout of the non-POD code of CGI::App and hammered out what I needed to do. Then, when she fell asleep for a nap, I typed it all out and started testing. And, I'm proud to say, it works. For an example, visit my development site to see a very simple, templated application in action.
I just read coverage of a panel of programming luminaries on Salon; the topic of discussion was about the state of programming. In the course of the discussion, the subject of Open Source came up. Several of the luminaries -- which included architects of the Mac OS and Windows, as well as others -- derided the community for basically reinventing the wheel, and wheels that need to be re-thought entirely anyways. One questioned, "Why is hte idealism just about how the code is shared -- what about idealism about the code itself?"
Andy Hertzfeld (who helped develop the original Mac OS) was sitting on the panel, and jumped in. He has been working with Eazel and Chandler in recent years, and thus has an inside view of open source. His initial comment: "It's because they want people to use the stuff!" Basically, they program Windows- or Mac-like interfaces because then people will be willing to try it out. They program office suites because people "need" an office suite to be productive. Such offerings hook them into the OSS movement.
Another participant, Dan Bricklin (of VisiCalc, a pioneering spreadsheet program) shared an anecdote from Bill Gates. Evidently, Gates gave an interview (with Lammers -- look up this person) in which he explained that his work on MS's BASIC compiler was done by looking at how other programmers had accomplished the task. In his own words, "The best way to prepare is to write programs, and to study great programs that other people have written. In my case, I went to the garbage cans at the Computer Science Center and I fished out listings of their operating systems."
So basically, Gates was an early adopter of OSS methodologies... Interesting to see that today he's so protective of MS code. Guess money might do that to you.
I was lamenting at work the other day that now that I've discovered OO and templating with PHP, the only major feature missing for me is a way to easily document my programs. I'm a big fan of perl's POD, and use it fairly extensively, even for simple scripts -- it's a way to provide a quick manual without needing to worry too much about how to format it.
So, it hit me on the way home Friday night: what prevents me from using POD in multiline comments of PHP scripts? I thought I'd give it a try when I got home.
First I googled for 'POD for PHP', and found a link to perlmongers where somebody recounted seeing that exact thing done, and how nicely it worked.
Then I tried it.. and it indeed worked. So, basically, I've got all the tools I love from perl in PHP, one of which is borrowed directly from the language!
I've been researching and coding for a couple months now with the decision that I'd rewrite the family website/portal using mod_perl with CGI::Application. I still like the idea, but a couple things recently have made me rethink it.
For starters, the perl DBI is a bit of a pain to program. At work, I've become very accustomed to using PEAR's DB library, and while it's in many ways derived from perl's DBI, it's much simpler to use.
Then there's the whole HTML::Template debacle. There's several ways in which to write the templates, but they don't all work in all situations, and, it seems they're a bit limited. We've started using PHP's Smarty at work, and it's much more intuitive, a wee bit more consistent, and almost infinitely more extendable. I could go the Template::Toolkit route for perl, but that's almost like learning another whole language.
Then, there's the way objects work in perl versus PHP. I've discovered that PHP objects are very easy and very extendable. I wouldn't have found them half as easy, however, if I hadn't already been doing object oriented programming in perl. One major difference, however, is how easy it is to create new attributes on the fly, and the syntax is much easier and cleaner.
Add to that the fact that if you want to dynamically require modules in perl, you have to go through some significant, often unsurmountable, hoops. So you can't easily have dynamic objects of dynamically defined classes. In PHP, though, you can require_once or include_once at any time without even thinking.
The final straw, however, was when I did my first OO application in PHP this past week. I hammered it out in a matter of an hour or so. Then I rewrote it to incorporate Smarty in around an hour. And it all worked easily. Then I wrote a form-handling libary in just over two hours that worked immediately -- and made it possible for me to write a several screen application in a matter of an hour, complete with form, form validation, and database calls. Doing the same with CGI::Application took me hours, if not days.
So, my idea is this: port CGI::Application to PHP. I love the concept of CGI::App -- it's exactly how I want to program, and I think it's solid. However, by porting it to PHP, I automatically have session and cookie support, and database support is only a few lines of code away when I use PEAR; I'll add Smarty as the template toolkit of choice, but make it easy to override the template methods to utilize . I get a nice MVC-style application template, but one that makes developing quickie applications truly a snap.
This falls under the "right-tool-for-the-job" category; perl, while a wonderful language, and with a large tradition as a CGI language, was not developed for the web as PHP was. PHP just makes more sense in this instance. And I won't be abandoning perl by any stretch; I still use it daily at work and at home for solving any number of tasks from automated backups to checking server availability to keeping my ethernet connection alive. But I have real strengths as a PHP developer, and it would be a shame not to use those strengths with our home website.