Slashdot Mirror

jeek writes "Perl 5.7.3 is out. This should be the last development version before 5.8.0 comes out in April or May." You can download it from CPAN or get a copy of it from SourceForge.net. If you have some free time try downloading it and testing it. According to the included perldelta.pod file, the highlights are: better Unicode support, new thread implementation, many new modules, better numeric accuracy, safe signals, and a completely overhauled and improved regression test suite.

BorrisYeltsin writes: "A couple of updates for Parrot are in a recent This Week on Perl 6, most imporantly Parrot 0.03 is out! Get it here , the release notes are here. Also Adam Turoff has got together the Parrot FAQ version 0.2 which addresses some of the more common questions about Parrot and Perl 6."

Chromatic, indefatigueable, has come up with another review. This time through the door he's gathered his reactions to Perl for System Administrators, one of the growing list of titles to help bridge the gap between SysAdmin and programmer.

Perl for System Administrators author David N. Blank-Edelman pages 430 publisher O'Reilly and Associates rating 9 reviewer chromatic ISBN 1-56592-609-9 summary A royal buffet of ideas to stimulate system administrators

The Scoop Despite being what some call 'the purest distillation of Unix thought,' Perl has earned a place on many Windows and Macintosh machines for its power and flexibility. Unix administrators have developed and honed small scripts for decades, but their brethren elsewhere have had no such luck until recently. Enter ActiveState, IndigoPerl, and MacPerl, to provide the tools, this book the knowledge. Floating subtle suggestions between pragmatic tips and tricks, David N. Blank-Edelman weaves nets, strong and sophisticated, for the perpetual battle against encroaching entropy. What's to Like? Anything that saves a beleagured sysadmin time is very good. Any one chapter read in isolation will yield at least one new idiom, if not many ideas on improving efficiency and accuracy. The central theme of the book ('make things better by using a database to store all of your information') is an excellent and timely idea. It's not essential to the presented examples, but has the potential to simplify your work dramatically. Besides maintaining a central repository for usernames, accounts, network information, and passwords, it allows automated configuration file building. Imagine never hand-editing DNS records again, or having to enter user data only once.

The sample code is clean and understandable, taking full advantage of many CPAN modules. When competing modules exist, Blank-Edelman demonstrates each, with an eye to advantages and disadvantages. This pragmatic analysis governs other discussions, especially concerning cross-platform and Pure Perl versus glue-code isses. Realizing that most networks combine many different clients (Unix flavors, the Windows cousins, and Apple machines), the author provides solutions to the same problem on all applicable platforms.

Though pushing the envelope on certain technologies (at the expense of others), the Appendices provide adequate introduction. The LDAP and SNMP sections stand out in particular. The author provides enough background, whether on Active Directory, TCP packet construction, or e-mail headers, to flesh out his examples. A table at the end of each chapter lists all modules covered, authors and versions, CPAN ids, and alternate download sites. In addition, the book provides many links to further information on techniques, RFCs, references, and vendors. If you're left wondering where to go to learn more, it will be your own fault.

What's to Consider? The book assumes a working knowledge of Perl. Anyone who's made it through 'Learning Perl' or 'Elements of Programming With Perl' should have no trouble -- complex idioms and module peculiarities receive sufficient explanation. Beware, though, that the sample code does not enable warnings or run under strict mode. (Production programs need error checking, which, the author explains, could easily double the size of his examples.)

Not all sections apply to all OSs. The Macintosh, for example, has no concept of multiple users (OS X not being covered). These differences could hinder the text, but are clearly marked and can be skipped with no ill effects. Besides, few networks are homogenous, and astute readers will learn more about the system in general from the similarities and differences.

Some common administrative tasks have been left out in favor of emerging or more complex technologies. There's nothing on managing printers or backups. A sysadmin of reasonable experience who makes it through the book will have gained a proper mental framework to tackle other tasks, though.

The Summary Perl for System Administrators is packed with useful tips, making the most of Perl's ecological niche. Whether you're a junior administrator venturing out into the wild world for the first time, or a seasoned BOFH, you'll find something to digest here. You might even get some free time out of it. Table of Contents

1. Introduction
2. Filesystems
3. User Accounts
4. User Activity
5. TCP/IP Name Services
6. Directory Services
7. SQL Database Administration
8. Electronic Mail
9. Log Files
10. Security and Network Monitoring

1. The Five-Minute RCS Tutorial
2. The Ten-Minute LDAP Tutorial
3. The Eight-Minute XML Tutorial
4. The Fifteen-Minute SQL Tutorial
5. The Twenty-Minute SNMP Tutorial

You can purchase this book at ThinkGeek.

In addition to all the other books he has insightfully reviewed, chromatic has written this review of CGI Programming With Perl. This books sounds like a great resource for the builder of dynamic Web sites with a Perl background. And isn't it nice to see a book with "an unapologetic Unix flavor"?

CGI Programming with Perl author Scott Guelich, Shishir Gundavaram, & Gunther Birznieks pages 451 publisher O'Reilly & Associates rating 9 reviewer chromatic ISBN 1-56592-419-3 summary Your guide to the protocols and practices of CGI programming, with a look at current tools, tips, and tricks.

The Scoop Static web pages sufficed back when the web was young. Information flowed one way (like it does on most corporate sites today). Those days are long behind us -- if you want dynamic and interactive content, a whole host of technologies have appeared to fill in the gaps.

Enter Perl and CGI -- the original Swiss Army chainsaw of programming met the standard for exchanging data over HTTP and it was good. Thousands and thousands of programmers discovered this combination of power and simplicity, and the web has never been the same. Now, it's your turn to descend into the mysteries of query strings and stateless transactions, hoping to emerge successfully with the knowledge of simple -- yet interactive -- web programming.

In this second edition, the authors have gone far beyond CGI circa 1996. New topics include XML, search engines, security, and high performance Perl-based alternatives to CGI. How far we've come...

What's to Like? The book begins with an explanation of HTTP. Understanding the underlying protocol gives a picture of the whole process. The same is done for CGI, examing the interface -- the environment, input, output, and headers. It's simple enough that the description never bogs down, but detailed enough to explain difficulties CGI authors must work around (session management being high on the list).

From there, it's on to forms and HTML and, before spending much time trying to write a custom decoder for form data, it's off to CGI.pm. (That's important, because it's hard to get this right, even for authors of some other CGI programming books.) As befits the module, this chapter explains handling input, generating output, and handling errors.

Shift gears for a second, and think about embedding your code in your HTML. Try SSI, HTML::Template, or Embperl. (This is just a taste of the techniques available for templating -- see Template Toolkit or Mason for other nice ones.) Following that, grit your teeth and learn some of the JavaScript you've been putting off. Use it to add an additional client-side form input checker, hook it up to your Perl with WDDX, or discover the powerful Bookmarklet.

Consider security in chapter 8 -- now that you've learned some cool tricks but before you know enough to get into real trouble, discover the vulnerabilities and how you can program around them. Use Perl's Taint mode and your web server configuration to help you out. Do not skip this chapter -- read it, then read perldoc perlsec until you get it. (It's a good chapter, but security can be hard, so don't rely on just one source of information.)

The rest of the book is a tour of various tasks you might want to accomplish. They're good too, but things shine again in the last three chapters, with help for the new, curious, frazzled Perl CGI programmer. How do you get rid of that annoying 500 server error? How can you make your program worth using for the next three years instead of worth throwing away every three months? How can you write something that will handle a hundred users a day? A thousand? A front-page link on Slashdot? (The answer is more than just FastCGI or mod_perl, though they're definitely the heavy guns.)

It's definitely time for a second edition of this tome. The expanded coverage of CGI.pm and templating technologies is a welcome addition. Promoting the use of the existing well-tested, documented, and debugged tools will, hopefully, lead to more maintainable code. Unlike some other books, the example code is clean and worthy of emulation. Hit the references and recommendation section in Appendix A for more good information, including relevant RFCs. Really. (It's a good sign for a Perl book to mention both the CPAN and perldoc, as in Appendix B.)

What's to Consider? Be careful about copying code blindly from the first few chapters without reading at least chapter 8 (and perldoc perlsec in Perl's included documentation)! Simple examples are appropriate for teaching and personal testing, but could have disastrous consequences on publicly-accessible servers. To the authors' credit, even the simple example code runs with warnings, taint mode, and the strict pragma.

You'll need to know some Perl -- at least enough to follow along with somewhat-idiomatic code. Platform and portability wise, there's an unapologetic Unix flavor to the examples. Nearly everything should work on Win32 and other operating systems, but be aware of certain differences. As for web server information, it's Apache-specific. (Configuration for other platforms will be similar, but is left as an exercise for the reader.)

Some topics could use more treatment. It would have been nice to have more information on HTML::Mason (though admittedly complex, it's powerful and probably deserves more than a two page introduction) and XML and Middleware. New technologies like RSS and WAP need tools and users and programmers. There's also more to say on debugging CGI applications, though a pointer to the facetiously named Idiot's Guide could be helpful.)

The Summary Newly updated, chock full of good advice and, above all, high-quality code, this book is a great place to learn how to focus your Perl skills in a popular direction. Follow the advice presented, ask around for help if you need it, and have fun. Don't bother spending 24 hours or 21 days or whatever it is now, learn CGI programming with Perl the right way.

special thanks to the amazing Simone at O'Reilly for her help making these and other reviews possible!

Table of Contents

1. Getting Started
2. The Hypertext Transfer Protocol
3. The Common Gateway Interface
4. Forms and CGI
5. CGI.pm
6. HTML Templates
7. JavaScript
8. Security
9. Sending Email
10. Data Persistence
11. Maintaining State
12. Searching the Web Server
13. Creating Graphics on the Fly
14. Middleware and XML
15. Debugging CGI Applications
16. Guidelines for Better CGI Applications
17. Effeciency and Optimization

1. Works Cited and Further Reading
2. Perl Modules

You can purchase this book at ThinkGeek.

qbasicprogrammer writes "The long awaited Perl 5.7.0 version has finally been released! Source code is available from CPAN. If you haven't upgraded yet, now is the time. In related news, development of Perl 6 is continuing swiftly as demonstrated by the Perl 6 Library." Check out the head's up story saying that it was coming - just a reminder this is *devel*. Don't play with it unless you know what you are doing.

david landgren writes " The Perl Institute has decided to call it a day. The main reason, according to Larry Wall, is that the Institute was "top-down", but Perl's culture is much more "bottom-up". The Institute's most valuable assets, the domains perl.org and cpan.org have been offered to the Perl Mongers. By the way, have you checked out whether there's a Perl Monger chapter in your part of the world? "