Open Source Development With Lamp

Overview

Open Source technologies are providing contemporary developers with a range of cost-effective and robust alternatives to commercial software for building dynamic, data-driven Web applications. This practical guide presents a comprehensive survey of LAMP (Linux, Apache, MySQL, Perl, and PHP), and it shows how these solutions can be implemented efficiently and securely while improving reliability and dramatically cutting costs.

Open Source Web Development with LAMP focuses on the...

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Overview

Open Source technologies are providing contemporary developers with a range of cost-effective and robust alternatives to commercial software for building dynamic, data-driven Web applications. This practical guide presents a comprehensive survey of LAMP (Linux, Apache, MySQL, Perl, and PHP), and it shows how these solutions can be implemented efficiently and securely while improving reliability and dramatically cutting costs.

Open Source Web Development with LAMP focuses on the most important core material necessary so that developers can "hit the ground running" and begin building applications right away. This book presents a balanced overview of LAMP technologies and allows the reader to decide which tool may be appropriate for the particular task at hand. After a general overview of Open Source technologies, the book presents an overview of the Web before moving on to cover structural, static, dynamic, and embedded technologies. The coverage here provides a description of the strengths and weaknesses of each Open Source technology and also acts as a reference guide for each application.

Topics covered include:

  • A comprehensive survey of Open Source technologies
  • Static and dynamic data and embedded HTML on the Web
  • Linux and Unix distributions, installations, and commands
  • Apache Web Server, Perl, and MySQL
  • Web site META language (WML)
  • Common gateway interface (CGI) and mod_perl
  • Server Side Includes (SSI), Embperl, and Mason
  • PHP syntax and functions

In addition to the discussions in the book, a companion Web site--www.opensourcewebbook.com--contains supplemental information, including tools, source code, helpful links to additional resources, and errata as needed.

Complete in coverage and practical in presentation, Open Source Web Development with LAMP spotlights the tools and technologies today's developers need to create workable, dynamic, and secure Web sites using Open Source technologies.

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Editorial Reviews

From Barnes & Noble
The Barnes & Noble Review
The open source community has delivered an extraordinary range of technologies for web development. The most widely used are often referred to by the acronym "LAMP": Linux, Apache, MySQL, and -- you choose -- either Perl or PHP. Now, there's a book that offers easy introductions to all of them, as well as related tools that make them even more powerful.

Open Source Development with LAMP starts with a simple explanation of web development itself, then covers "just enough" of each technology to get you rolling comfortably. For example, you'll learn just enough Apache configuration, and just enough Linux (navigating filesystems, setting environment variables, basic security precautions, and the like). In the MySQL chapter, you'll create simple databases, then learn the basic SQL commands for working with them. (Later, you'll learn to write CGI scripts that integrate with those databases.)

After a practical introduction to Perl scripting, longtime *nix hackers James Lee and Brent Ware cover three powerful tools for Perl-based web development. The first: mod_perl, a complete Perl interpreter that's embedded into Apache. Mod_perl lets you run Perl-based CGI programs faster, and customize every phase of Apache's processing, from request and authentication through logging.

Later, Lee and Ware introduce Embperl, which lets you execute server-side programs by embedding Perl code into HTML files; and Mason, for building pages from shared, reusable Perl components -- solving problems from caching to site maintenance.

There's also a full chapter on WML: not the failed Wireless Markup Language but Ralf Engelschall's newer Website META Language for creating and maintaining complex static sites with a consistent look and feel. Finally, for those who prefer the other "P," there's a hands-on introduction to PHP, with its nifty native support for MySQL connectivity, PDF generation, and email response.

Whether you're new to open source web development or you've used some of these tools but not others, Open Source Development with LAMP is a great survey of the landscape. Bill Camarda

Bill Camarda is a consultant, writer, and web/multimedia content developer. His 15 books include Special Edition Using Word 2000 and Upgrading & Fixing Networks For Dummies®, Second Edition.

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Product Details

  • ISBN-13: 9780201770612
  • Publisher: Pearson Technology Group 2
  • Publication date: 12/17/2002
  • Pages: 496
  • Product dimensions: 7.50 (w) x 9.25 (h) x 1.00 (d)

Meet the Author

James Lee is founder and CEO of Onsight Inc., an Open Source training and development company. He has developed a number of Web sites using Linux, Apache, MySQL, mod_perl, Embperl, and related technologies. A contributor to Linux Journal, he is the coauthor of Hacking Linux Exposed (McGraw-Hill/Osborne, 2001).

Brent Ware holds a Ph.D. in physics and an M.S. in electrical engineering and is currently a scientist at NASA/Caltech¿s Jet Propulsion Labs in Pasadena, California. He has been a system administrator of Linux, Unix, and Mac OS X systems and also contributed to Hacking Linux Exposed (McGraw-Hill, 2001).

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Table of Contents

Foreword.

Preface.

Acknowledgments.

About the Authors.

Introduction.

The Best of All Possible Worlds.

Open Source Software.

Summary.

Resources.

Introduction.

The best of all possible worlds.

Is this book for you.

Open Source Software.

It's not just for Linux.

Summary.

2. The Web Explained.

How It Works.

What We Don't Talk About.

Security.

I. STRUCTURAL.

3. Linux-the Choice of a GNU Generation.

Introduction.

Basic Unix.

4. Apache Web Server.

Introduction and Description.

Starting, Stopping, and Restarting Apache.

Configuration.

Securing Apache.

Create the Website.

Apache Log Files.

Summary.

5. Perl.

Introduction.

Perl Documentation.

Perl Syntax Rules.

A Quick Intro to Object Oriented Programming.

What We Didn't Talk About.

Summary.

Resources.

6. MySQL.

Introduction.

MySQL Tutorial.

DBI.

Table Joins.

Loading and Dumping a Database.

Summary.

Resources.

II. STATIC.

7. WML - Website META Language.

Introduction.

Installation.

The Basics.

Creating a Template.

Other Helpful Includes.

Diversion.

A Better Template.

Configuring WML with .wmlrc.

Macros - Creating Custom Tags.

Programming Code - Eperl.

Project.

Summary.

Resources.

III. DYNAMIC.

8. CGI - The Common Gateway Interface.

Introduction.

CGI Introduction.

Apache Configuration.

A First CGI Program.

What Can Go Wrong?

CGI.pm Introduced.

CGI.pm HTML Shortcuts.

Information Received by the CGI Program.

Form Widget Methods.

CGI Security Considerations.

A Note About die().

Project - CGI/MySQL/DBI.

Summary.

Resources.

Books.

Web Sites.

9. Mod_perl.

Introduction.

Configuration.

Turning CGIs into mod_perl Programs.

Pure mod_perl Programming.

Project: MySQL, DBI and mod_perl.

Other Stuff You Can Do.

Summary.

Resources.

IV. EMBEDDED.

10. SSI - Server Side Includes.

Introduction.

SSI Introduction.

SSI Security Considerations.

Summary.

Resources.

Web Sites.

11. Embperl (HTML::Embperl).

Introduction.

Installing Embperl.

Apache Configuration.

A Quick Example.

Embperl Commands.

Posted Data and %fdat.

Other Embperl Variables.

Embperl Project.

What We Didn't Talk About.

Summary.

Resources.

12. Mason (HTML::Mason).

Introduction.

Installation.

Apache Configuration.

Quick Example.

In-line Perl Sections.

Handling Posted Data with %ARGS and (%args).

Mason Components.

Mason Project.

What We Didn't Talk About.

Summary.

Resources.

13. PHP.

Introduction.

Embedding PHP into HTML.

Configuration.

A Couple of Quick Examples.

Language Syntax.

Built-in PHP Functions.

PHP and MySQL.

Project.

Summary.

Resources.

Appendix A Source Code.

Perl.

MySQL.

WML.

CGI.

Mod_perl.

SSI.

HTML::Embperl.

HTML::Mason.

PHP.

Bibliography.

Index. 020177061XT05052003

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Preface

Is This Book for You?

This book's target audience is the person who wants to get an interactive database-based web site up and running without spending a whole bunch of money on a large stack of books and software. That person might be a technically competent Linux user who is not necessarily a Perl or a CGI whiz; a graphic designer, with a technical bent, who wants to build a web site without becoming a certified computer whiz; or an MCSE who has heard rumors that there might be another way to do things.

Up to now, these folks would have had to purchase four or five thick books and wade through them, picking out the knowledge needed to accomplish necessary tasks. It's likely they would accomplish this in a less than optimal way, picking up some things and missing others, revamping and redoing as they learn new things without being aware of the security considerations necessary to keep their site and computer safe. The goal of this book is to summarize much of the information about Open Source in one place and to do so in a manner that will get the prospective web developer up and running safely and efficiently, including pointers to other resources when it becomes necessary to have more knowledge than is provided here.

Our target audience, ideally, would have some familiarity with Unix, some sort of modern programming language (C, FORTRAN, Perl, Pascal, C++, Java—most anything will do), and HTML. The scope here, and the sheer constraints on its size, force us to limit explanations and assume some background knowledge; we touch on a lot of things, enough so that you ought to be able to ask the right questions on a search engine. If you don't have any Unix experience, or if you are not a seasoned programmer, this book can still be useful, with motivation and, perhaps, the purchase of a few other computer books.

What It Will Do

In this book, we introduce you to the pillars of LAMP—Linux, Apache, MySQL, and Perl and PHP, with mod perl, Embperl, Mason, and WML tossed in for good measure. We are biting off a lot with this book, and this is what we intended to do. We want to cover as much ground as possible and present you with various approaches for programming a web site with Open Source products. The goal is to point out the part of each of these Open Source approaches that provides the most functionality.

Another goal is to make you aware of current techniques and standards: What is easily possible, what might be possible with more work, which tool is appropriate for which task. Just as important is how to discern the things you need from those you don't, or don't need just yet. Not least of all is how to do these things in as secure a fashion as possible. After all, you are opening up your box to the world with these techniques and should be wary of those with impure motives.

Based on experience, we believe that 80 percent of the utility of any complicated tool is the result of knowing 20 percent of the uses of that tool, whether that tool be software, hardware, mechanical, or electronic. Swiss Army knives are excellent and versatile tools, but most of the time, you just use the blade or the screwdriver.

The purpose of this book is to introduce you to that 20 percent—the blade and the screwdriver—that opens up the most functionality, and to make you aware of the remaining 80 percent so that you can use the other tools when appropriate.

And to teach you to not use the blade as a screwdriver.

Four Parts

The book is divided into four parts:

Part I, Structural: Linux, Apache, MySQL, Perl—the structural system foundations on which LAMP is built and the other programs run.

  • Linux is the operating system this is all based on. We touch only lightly on Linux because it's a big subject and one that doesn't need to be dealt with much after it's installed.
  • Apache is the web server software that serves web pages up to clients and decides how requests for documents, forms, and so on will be processed.
  • Chapter 1 talks about the basics of configuring and setting up a web site.
  • MySQL is an SQL database program. It is "the world's most popular Open Source Database" (it says so on their web site).
  • Perl is the programming language of choice for interacting with text files, shell scripts, and a million other things. (Python is similar to Perl in functionality; however, we chose Perl for our purposes because we know it better and like it.)

Part II, Static: WML is a set of programs that facilitates building and managing large-scale static web sites using HTML files.

Part III, Dynamic: CGI and mod perl are the programs with which to build dynamic web sites.

  • CGI is the tried-and-true way of generating dynamic content.
  • mod perl is a better, faster, and stronger way of generating dynamic content; mod perl combines two pillars of Open Source: Apache and Perl.

Part IV, Embedded: SSI, Embperl, Mason, and PHP are embedding programs to use within HTML pages.

  • Server Side Includes (SSI) is built into Apache. Its job is to preprocess HTML
  • les, turning SSI directives into HTML text; it allows web programmers to embed executable code into HTML files.
  • Embperl and Mason are Perl modules for building embedded web content.
  • PHP is another way to embed executable code with HTML *les. PHP does what Embperl and Mason do, just differently.

So why have so many choices? Read on, gentle reader, and you will discover that a myriad of choices is the Open Source way!

Does This Free Software Come with .docs?

Of course, with free software, there's free documentation--see www.linuxdoc.org and httpd.apache.org/docs/, to name two. The ultimate documentation, the source code, is available to anyone. (Thus the Open Source joke, "Use the source, Luke!") Because of the large community of developers and users, there are many newsgroups and discussion forums in which it is likely that someone else has had the same problem as you and has posted a solution. Search using Google (www.google.com) and its interface to the Usenet archive (groups.google.com). If you've installed Linux from a distribution, much of the documentation is likely sitting on your hard drive. In an ideal world, you would just read it--that's what we did. Excellent resource though it is, it leaves something to be desired as a learning method. Much of it was written for reference, not instruction. Some of the documentation has not been updated along with the software. (Hey, these folks work for free. In any case, this is a problem to which closed-source software is not immune.)

The Old Bait and Switch

For all our talk of being self-contained, realistically, two books that you can't escape having handy are Hacking Linux Exposed and Unix System Administration Handbook—or, more generically, a book on security and another on system administration. These two are our favorites (hereafter known as HLE and USAH). Each of these subjects is much larger than can be covered here, and both are crucial and unavoidable (but also fun). Get them, read them, grok them.

Companion Web Site

In this book, you are shown examples of how to do all the things we discuss on an active web site (www.opensourcewebbook.com/) so that you can see the code and the results, and be pointed to additional resources. We're striving to be self-contained, but we like books, and often tell you which other ones you might want to look at. The entire web site can also be downloaded from www.opensourcewebbook.com/sourcecode/.

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