Sean M. Burke

Perl & LWP (eBook, PDF)

• Format: PDF

Produktbeschreibung

Perl soared to popularity as a language for creating and managing web content, but with LWP (Library for WWW in Perl), Perl is equally adept at consuming information on the Web. LWP is a suite of modules for fetching and processing web pages.The Web is a vast data source that contains everything from stock prices to movie credits, and with LWP all that data is just a few lines of code away. Anything you do on the Web, whether it's buying or selling, reading or writing, uploading or downloading, news to e-commerce, can be controlled with Perl and LWP. You can automate Web-based purchase orders as easily as you can set up a program to download MP3 files from a web site.Perl & LWP covers:Understanding LWP and its designFetching and analyzing URLsExtracting information from HTML using regular expressions and tokensWorking with the structure of HTML documents using treesSetting and inspecting HTTP headers and response codesManaging cookiesAccessing information that requires authenticationExtracting linksCooperating with proxy cachesWriting web spiders (also known as robots) in a safe fashionPerl & LWP includes many step-by-step examples that show how to apply the various techniques. Programs to extract information from the web sites of BBC News, Altavista, ABEBooks.com, and the Weather Underground, to name just a few, are explained in detail, so that you understand how and why they work.Perl programmers who want to automate and mine the web can pick up this book and be immediately productive. Written by a contributor to LWP, and with a foreword by one of LWP's creators, Perl & LWP is the authoritative guide to this powerful and popular toolkit.

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Produktdetails

• Verlag: O'Reilly Media
• Seitenzahl: 250
• Erscheinungstermin: 20. Juni 2002
• Englisch
• ISBN-13: 9780596516376
• Artikelnr.: 52996131

Autorenporträt

Sean M. Burke is an active member in the Perl community and one of CPAN's most prolific module authors. He has been a columnist for The Perl Journal since 1998, and is an authority on markup languages. Trained as a linguist, he also develops tools for software internationalization and native language preservation. Sean is also the author of O'Reilly's Perl & LWP.

Inhaltsangabe

Foreword
Preface
Chapter 1: Introduction to Web Automation
Chapter 2: Web Basics
Chapter 3: The LWP Class Model
Chapter 4: URLs
Chapter 5: Forms
Chapter 6: Simple HTML Processing with Regular Expressions
Chapter 7: HTML Processing with Tokens
Chapter 8: Tokenizing Walkthrough
Chapter 9: HTML Processing with Trees
Chapter 10: Modifying HTML with Trees
Chapter 11: Cookies, Authentication,and Advanced Requests
Chapter 12: Spiders
Appendix A: LWP Modules
Appendix B: HTTP Status Codes
Appendix C: Common MIME Types
Appendix D: Language Tags
Appendix E: Common Content Encodings
Appendix F: ASCII Table
Appendix G: User's View of Object-Oriented Modules
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