Web, Graphics & Perl/Tk Programming by Orwant, Jon -- Read -- Imperial Library of Trantor

Index

Web, Graphics, and Perl/Tk: Best of the Perl Journal

SPECIAL OFFER: Upgrade this ebook with O’Reilly A Note Regarding Supplemental Files Preface

Finding Perl Resources Conventions Used in This Book Comments and Questions Acknowledgments

1. Introduction I. Web

2. CGI Programming

CGI Programming Without CGI.pm The CGI.pm Module

3. Saving CGI State

State in CGI Scripts A Sample State-Maintaining CGI Script

4. Cookies

Creating Cookies Retrieving Cookies A Sample Cookie Program

5. mod_perl

Transaction Handlers A Typical Content Handler Apache::Registry A Typical Non-Content Handler Getting Fancy: A Stately Script Impaled by the Fork Other mod_perl Features

6. Creating mod_perl Applications

So, What Is This mod_perl Thing, Anyhow? Developing with mod_perl Apache::Registry Embperl Writing Your Own Handler Performance

Preload Your Modules Use Multiple Servers

Our Sample Application Components DBI and Apache::DBI Apache::AuthDBI Apache::Sandwich Writing the Application Code

Database Setup TopTenTrans.pm index.epl rateit ttadmin

Putting It All Together

httpd.conf

7. Proxying with mod_perl

Why Proxy? How the Proxy Protocol Works Identifying Ads

8. Authentication with mod_perl

Access Control Authentication

Windows Domain Server Authentication More NT Authentication

Authorization

Basic Authorization More Sophisticated Authorization

Conclusion

9. Navigation Bars with mod_perl

The Configuration File Activating the Navigation Bar Generating the Navigation Bar A Foundation to Build On

10. Scripting the Web with LWP 11. Five Quick Hacks: Downloading web Pages

Downloading Currency Exchange Rates Downloading Weather Information Downloading News Stories Completing U.S. Postal Addresses Downloading Stock Quotes Conclusion Afterword

12. Downloading Web Pages Through a Proxy Server

Afterword

13. HTML::Parser

Getting Started The Identity Parser The HTML Tag Stripper Another Example: HTML Summaries Another Fictional Example Using HTML::Parser Version 3 Acknowledgments

14. Scanning HTML

HTML::Parser, HTML::TreeBuilder, and HTML::Element Scanning HTML Trees Complex Criteria in Tree Scanning A Case Study: Scanning Yahoo! News Regardez, Duvet!

15. A Web Spider in One Line

Callbacks and Closures Cascading Arrows Using Modules with One-Liners The End

16. Webpluck

Similar Tools How to Use webpluck How webpluck Works The Dark Side of the Force

Identify Yourself Don’t Overload a Site Obey Robot Exclusion Rules

17. Torture-Testing Web Servers and CGI Scripts

The Code Wrapping Up

18. Securing Your CGI Scripts

The Example Script Designing the Script The chat2.pl Library Oops The CGI Script The Rest of the Script Caveats

19. Building Web Sites with Mason

What Is Mason?

SSI Redux Form Versus Function

Installation Building a Dynamic Site

Headers and Footers Passing Parameters Default Handlers and XML Accessing MySQL

What Now?

20. Surreal HTML

How It Works Prompting the User Fetching the Document Running the Travesty Algorithm Printing the Mangled Document

21. Web Page Tastefulness

How It Works The <BASE> Tag For Extra Credit

22. Summarizing Web Pages with HTML::Summary

CS-Web: A Search Engine for Canon’s Web Space META Tags Basic Summarization Methods HTML::Summary The Summarization Algorithm Sentence Splitting Conclusion Afterword: Truncating Japanese Text

23. Wireless Surfing with WAP and WML

A Quick Look at WAP Enabling WAP on Apache WML Basics WAP Cards Developing WAP Applications CGI::WML A Small File Browser with CGI::WML and mod_perl Generating WML with HTML::Mason A WML Phone Directory with Mason WML with Straight Perl A Remote Control for Home Automation Creating a Personal Portal

II. Graphics

24. Web Plots with Gnuplot

Using Gnuplot Parsing Log Files Putting It All Together Simple Things Made Easy

25. GD-Graph3d

Using GD-Graph3d What the Future Holds Installing GD

26. GD and L-Systems

GD L-Systems Turtles A Turtle Draws a Tree Putting L-Systems to Work Leaves Flowers Bringing It All Together Resources

27. OpenGL

Back to Basics Graphical Primitives

The Vertex The Line The Polygon

Drawing on the Screen

The Viewport The View Frustum Perspective Rendering Pipelines

Introduction to OpenGL OpenGL and Perl

Creating a Viewport Creating the View Frustum

Drawing Objects

Some Viewport Tricks Viewport Resize Issues

Resources References Acknowledgments

28. Ray Tracing

Technique Make It Faster Mathematics The Program The Input The Output Internals Other Directions

29. Perl and the Gimp

Using the Gimp Getting the Tools Using the Gimp Module Moving On

30. Glade

GTK+/Gnome Perl and GTK+/Gnome Glade Installation Designing an Interface Adding Code Saving and Building the Project Writing the Signal Handler Code Inheritance as a GUI Development Tool Further Exploration More Information

31. Gnome Panel Applets

Gnome Program Overview Initialization The Callbacks Conclusion Afterword

32. Capturing Video in Real Time

Video::Capture::V4l Part I: Video Capturing Capturing Frames in a Loop Channels, Tuners, and Audio and Picture Settings Magic Constants for Frequencies? Example: Image Sequence Detection Example: Real Time Video Capturing Part II: The Vertical Blanking Interval Standards Decoding VPS The Autotune Script Decoding Videotext References

III. Perl/Tk

33. A Perl/Tk Roadmap

Understand the Basics Ignore What You Don’t Need

34. Getting Started with Perl/Tk

Perl/Tk Programming A Sample Perl/Tk Program: plop Improving plop

35. Scoreboard: A 15-Minute Perl/Tk Application

The Need The Design The Implementation

36. The Mouse Odometer

Measuring Distance Menus The ColorEditor Widget Composite Widgets

37. Events

Timer Events I/O Events Idle Events Pong Miscellaneous Event Commands

38. The Pack and Grid Geometry Managers

A Brief Look at the Packer The Gridder

39. Drawing on a Canvas

Our Mower Is Programmable! A Canvas Widget Is the Lawn Defining the Perl Mowing Module Zero Turning Radius, Take One The Canvas Line Item Type Zero Turning Radius, Take Two Rotating Simple Objects in Canvas Space The Canvas Rectangle and Text Item Types The Canvas Arc Item Type Nonzero Turning Radius, Take One Canvas Tags Scaling Canvas Items The Real World Is Uncertain

40. Displaying Databases with the Tree Widget

Using Databases from Perl Overview of the tkdb Application Building the Graphical Interface Creating a Tree View of a Database Making Changes to a Database The Tk::Error Subroutine

Index

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