Perl How to Program : Introducing CGI and Python

, by Deitel, Harvey M.; Deitel, Paul J.; Nieto, Tem R.; McPhie, D. C.

Note: Supplemental materials are not guaranteed with Rental or Used book purchases.

ISBN: 9780130284181 | 0130284181
Cover: Paperback
Copyright: 1/25/2001

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This new book by the world's leading programming language textbook authors carefully explains how to use Perl as a general-purpose programming language and how to program multi-tier, client/server, database-intensive, Internet-and-Web-based applications. Dr. Harvey M. Deitel and Paul J. Deitel are the principals of Deitel & Associates, Inc., the internationally recognized corporate training and content-creation organization specializing in C++, Javatrade;, C#, C, Visual Basicreg;, XMLtrade;, Python, Perl, Internet, World Wide Web and object technologies. The Deitels are also the authors of the world's #1 Java and C++ textbooks, Java How to Program, 3/e and C++ How to Program, 3/e. In Perl How to Program, the Deitels and their colleagues, Tem R. Nieto and David C. McPhie, discuss topics you need to build complete, Web-based applications including: CGI/HTML forms/XML/CGI.pm Control Structures/Arrays/Hashes Regular Expressions/Strings Objects/Encapsulation OOP/Inheritance/References Database/DBI/SQL/Signals/Contexts Security/Accessibility Typeglobs/File Globbing Networking/Sockts/Internet Protocols Cookies/Session Tracking Filehandles/Data Structures Process Control/Forking/Piping Subroutines/Modules/Packages/Overloading Web Automation/OLE Automation Server-Side Includes/Ties/Closures Graphics/GUI/Perl/TK Perl How to Program includes extensive pedagogic features: Hundreds of LIVE-CODEtrade; programs with screen captures that show exact outputs Extensive World Wide Web and Internet resources to encourage further research Hundreds of tips, recommended practices and cautions-all marked with icons

Contents

vii

Illustrations

xviii

Preface

xxx

Introduction to Computers, the Internet and the World Wide Web

(25)

Introduction

(1)

What Is a Computer?

(1)

Computer Organization

(1)

Evolution of Operating Systems

(1)

Personal Computing, Distributed Computing and Client/Server Computing

(1)

Machine Languages, Assembly Languages and High-level Languages

(1)

Structured Programming

(1)

Object-Oriented Programming

(1)

Hardware Trends

(1)

History of the Internet

(1)

History of the World Wide Web

(1)

History of Perl

(2)

Perl Library

(1)

General Notes About Perl and This Book

(1)

A Tour of the Book

(9)

Internet and World Wide Web Resources

(4)

Introduction to Programming in Perl

(34)

Introduction

(1)

Simple Programs that Display Lines of Text

(5)

A Simple Program: Printing a Line of text

(2)

Executing the Program

(1)

A Simple Program: Printing Several Lines of Text

(2)

Another Simple Program: Adding Two Integers

(2)

Memory Concepts

(1)

Scalar Values and Scalar Variables

(1)

Arithmetic Operators

(4)

Assignment Operators

(1)

Increment and Decrement Operators

(2)

Decision Making: Equality and Relational Operators

(4)

Confusing Equality (==) and Assignment (=) Operators

(2)

String Operators

(1)

Numeric and String Contexts

(2)

Internet and World Wide Web Resources

(8)

Control Structures: Part I

(34)

Introduction

(1)

Algorithms

(1)

Pseudocode

(1)

Control Structures

(2)

if and unless Selection Structures

(3)

if/else and if/elsif/else Selection Structures

(3)

while and until Repetition Structures

(2)

do/while and do/until Repetition Structures

(2)

Formulating Algorithms: Case Study 1 (Counter-controlled Repetition)

(3)

Formulating Algorithms with Top-down, Stepwise Refinement: Case Study 2 (Sentinel-controlled Repetition)

(5)

Formulating Algorithms with Top-down, Stepwise Refinement: Case Study 3 (Nested Control Structures)

(4)

Internet and World Wide Web Resources

(8)

Arrays and Hashes

(41)

Introduction

(1)

Additional Data Types

(1)

Lists and List Context

(1)

Arrays

(3)

Creating and Manipulating an Array

(1)

Repetition with the for Structure

100

(3)

Additional Examples of Creating Arrays

103

(4)

Array Manipulation

107

(4)

Array Functions

111

(4)

List Functions

115

(1)

Searching Sorted Arrays

116

(6)

Linear Search

116

(2)

Binary Search

118

(4)

Introduction to Hashes

122

(1)

Creating and Manipulating a Hash

122

(3)

Hash-related Functions

125

(4)

Internet and World Wide Web Resources

129

(6)

Control Structures: Part II

135

(35)

Introduction

136

(1)

foreach Repetition Structure

136

(3)

Special Variable $_

139

(1)

Loop Control Shortcuts: grep and map

140

(2)

Case Study: Computing Mean, Median and Mode

142

(4)

Loop Controls: The next Statement

146

(1)

Loop Controls: The last Statement

147

(1)

Loop Controls: The redo Statement

148

(1)

Block Labels

149

(1)

Bare Blocks

150

(1)

Logical Operators

151

(4)

Using Logical Operators for Flow Control

155

(2)

Error Functions: die and warn

157

(1)

Summary of Structured Programming

158

(12)

Subroutines and Functions

170

(46)

Introduction

171

(1)

Subroutines in Perl

171

(2)

Built-in Math Functions

173

(1)

User-defined Subroutines

174

(2)

Argument Lists

176

(2)

Returning Values

178

(2)

Other Ways to Invoke a Subroutine

180

(3)

Random-Number Generation

183

(4)

Example: A Game of Chance

187

(3)

Recursion

190

(3)

Example Using Recursion: Fibonacci

193

(3)

Recursion vs. Iteration

196

(1)

Scope Rules: Global, Lexical and Dynamic

197

(3)

Namespaces, Packages and Modules

200

(6)

Defining a Package and Importing it with require

200

(3)

Modules and the use Statement

203

(2)

Other Features of the use Statement

205

(1)

Pragmas

206

(10)

Introduction to the Common Gateway Interface (CGI)

216

(37)

Introduction

217

(1)

A Simple HTTP Transaction

217

(3)

A Simple CGI Script

220

(4)

Using CGI.pm to Generate HTML

224

(3)

Sending Input to a CGI Script

227

(2)

Using HTML Forms to Send Input

229

(6)

Using CGI.pm to Create Forms and Read Input

235

(3)

Other Headers

238

(1)

Example: An Interactive Portal

239

(4)

Internet and World Wide Web Resources

243

(10)

Regular Expressions

253

(31)

Introduction

254

(1)

Matching Operator m//

254

(2)

Substitution Operator s///

256

(1)

Special Characters and Character Classes

257

(2)

Alternation

259

(2)

Quantifiers

261

(2)

Quantifier Greediness

263

(1)

Assertions

264

(2)

Backreferences

266

(3)

More Regular-Expression Modifiers

269

(1)

Global Searching and the /g Modifier

270

(1)

Example: Form Verification

271

(5)

Internet and World Wide Web Resources

276

(8)

String Manipulation

284

(35)

Introduction

285

(1)

Quotes and Quote Operators

285

(3)

``Here'' Documents

288

(2)

Basic String Functions

290

(2)

chop and chomp functions

292

(3)

index and rindex Functions

295

(2)

Function join

297

(1)

Function split

298

(2)

tr/// Translation Operator

300

(2)

Formatting Outputs with printf and sprintf

302

(3)

Printing with Field Widths and Precision

305

(2)

Using Flags in the printf Format Control String

307

(3)

Evaluating Strings as Perl Code

310

(9)

File Processing

319

(26)

Introduction

320

(1)

Data Hierarchy

320

(2)

Filehandles

322

(1)

Opening and Closing Filehandles

323

(2)

Using Filehandles

325

(2)

@ARGV Special Variable

327

(1)

Other Ways to Read from Files

328

(1)

Implementing a Random-Access File

329

(3)

Example: Web-Page Log Generator

332

(3)

Example: Guestbook

335

(2)

Internet and World Wide Web Resources

337

(8)

File and Directory Manipulation

345

(19)

Introduction

346

(1)

File Tests and sysopen

346

(3)

Permissions

349

(1)

File Manipulation

350

(3)

Hard Links and Symbolic Links

353

(1)

File Globbing

354

(1)

Directory Handles and Manipulation

354

(1)

Example: Web Site Recent-Update Page

355

(9)

Formatting

364

(35)

Introduction

365

(1)

Creating Formatted Reports

365

(3)

Top-of-Form Processing

368

(2)

Multiple-Line Format Fields

370

(3)

Format Variables

373

(4)

Case Study: Outputting a Database

377

(3)

Case Study: Web Log Analyzer

380

(19)

References

399

(40)

Introduction

400

(1)

References

400

(2)

References to Nonscalars

402

(3)

Anonymous Structures

405

(3)

Closures

408

(2)

References as Function Arguments

410

(4)

Nested Data Structures

414

(5)

Garbage Collection and Circular References

419

(1)

Symbolic References

420

(3)

Typeglobs

423

(4)

Referencing Filehandles

427

(2)

Uses for References

429

(3)

Internet and World Wide Web Resources

432

(7)

Objects and Modules

439

(39)

Introduction

440

(1)

Using a Class

441

(2)

Creating a Simple Class

443

(3)

Inheritance

446

(5)

Overriding Methods

451

(5)

Other Class Relationships: Multiple Inheritance, Composition and Containment

456

(2)

Base Class Universal

458

(1)

Encapsulation: Public vs. Private

459

(1)

Closure Method

460

(3)

Implicit Functions

463

(2)

Autoload Function

465

(3)

Tied Variables

468

(2)

Internet and World Wide Web Resources

470

(8)

Databases: SQL and Perl Database Interface (DBI)

478

(47)

Introduction

479

(1)

Relational Database Model

480

(1)

Relational Database Overview: Employee.mdb

481

(1)

Structured Query Language (SQL)

482

(9)

Basic Select Query

483

(1)

Where Clause

484

(2)

Order By Clause

486

(2)

Inserting a Record

488

(1)

Updating a Record

489

(1)

Deleting a Record

490

(1)

Introduction to DBI

491

(1)

Working with DBI

491

(3)

Manipulating a Database with DBI

494

(4)

DBI and the Web

498

(10)

DBI Utility Functions

508

(1)

MySQL Server

508

(10)

Internet and World Wide Web Resources

518

(7)

Session Tracking and Cookies

525

(34)

Introduction

526

(1)

Uses of Storing Data

526

(1)

Methods of Storing Data

526

(1)

Query Strings

527

(4)

Hidden Fields

531

(3)

534

(4)

Server-side Files

538

(4)

Example: Shopping Cart

542

(17)

Web Automation and Networking

559

(29)

Introduction

560

(1)

Introduction to LWP

560

(1)

LWP Commands

561

(3)

The LWP::Simple Module

564

(1)

HTML Parsing

565

(2)

Introduction to Advanced Networking

567

(1)

Protocols

568

(1)

Transport Control Protocol (TCP)

568

(4)

Simple Mail Transfer Protocol (SMTP)

572

(3)

Post Office Protocol (POP)

575

(4)

Searching the World Wide Web

579

(9)

Process Management

588

(27)

Introduction

589

(1)

The fork command

590

(4)

The system and exec functions

594

(3)

Controlling the Input and Output of Processes

597

(4)

Communicating Between Processes

601

(3)

Signal Handling

604

(2)

Sending Signals

606

(2)

OLE Automation

608

(7)

Security

615

(69)

Introduction

616

(1)

What Makes a Program Insecure

617

(1)

Using User Data with Shell Commands

618

(4)

Defensive Programming

622

(2)

Taint Mode

624

(2)

Printing User Input to a Web Page

626

(6)

Denial-of-Service Attacks

632

(3)

Other Security Attacks

635

(3)

Using Hidden Fields

638

(6)

Introduction to Cryptography Theory

644

(1)

Using Encryption

645

(4)

Secret-key Cryptography

649

(2)

Public-Key Cryptography

651

(3)

Key Agreement Protocols

654

(1)

Key Management

654

(1)

Digital Signatures

655

(1)

Public-Key Infrastructure, Certificates and Certification Authorities

656

(2)

Cryptanalysis

658

(1)

Security Protocols

659

(2)

Secure Sockets Layer (SSL)

659

(1)

Secure Electronic Transaction™ (Set™)

660

(1)

Network Security

661

(2)

Firewalls

661

(1)

Kerberos

662

(1)

Biometrics

663

(1)

Steganography

663

(2)

Internet and World Wide Web Resources

665

(19)

Data Structures

684

(37)

Introduction

685

(1)

Self-referential Structures

685

(1)

Linked Lists

686

(10)

Doubly Linked Lists

696

(5)

Stacks and Queues

701

(3)

Trees

704

(7)

Hashes

711

(10)

Graphics/Tk

721

(22)

Introduction

722

(1)

GD Module: Creating Simple Shapes

722

(3)

GD Module: Image Manipulation

725

(1)

Chart Module

726

(2)

Introduction to GUI

728

(1)

Introduction to Tk

728

(2)

Tk: GUI Components

730

(4)

Tk Case Study: A GUI Application

734

(9)

Extensible Markup Language (XML)

743

(66)

Introduction

744

(1)

Perl and XML

745

(1)

Structuring Data

746

(6)

XML Namespaces

752

(2)

Document Type Definitions (DTD) and Schema

754

(5)

Document Type Definitions

754

(2)

W3C XML Schema

756

(3)

Customized Markup Languages

759

(3)

MathML

760

(1)

WML

761

(1)

XBRL

762

(1)

ebXML

762

(1)

FpML

762

(1)

Other Markup Languages

762

(1)

Document Object Model (DOM)

762

(2)

XML::DOM

764

(5)

DOM Methods

769

(3)

Simple API for XML (SAX)

772

(1)

Parsing XML with XML::Parser

773

(4)

Data::Dumper and XML

777

(1)

Extensible Style Language (XSL)

777

(5)

Generating XML in Perl

782

(2)

Case Study: Message Forums with Perl and XML

784

(16)

Displaying the Forums using XML::Parser

785

(4)

Using XML::DOM to Add Forums and Messages

789

(3)

Alterations for Non-XSL Browsers

792

(8)

Internet and World Wide Web' Resources

800

(9)

Accessibility

809

(26)

Introduction

810

(1)

Providing Alternatives for Multimedia Content

810

(9)

Maximizing Readability by Focusing on Structure

819

(1)

Accessibility in HTML Tables

820

(3)

Accessibility in HTML Frames

823

(1)

Using Voice Synthesis and Recognition with VoiceXML™

823

(4)

JAWS® for Windows

827

(1)

Other Accessibility Tools

828

(1)

Internet and World Wide Web Resources

828

(7)

Bonus: Introduction to HyperText Markup Language 4: Part I

835

(23)

Introduction

836

(1)

Markup Languages

836

(1)

Editing HTML

837

(1)

Common Elements

837

(3)

Headers

840

(1)

Linking

841

(3)

Images

844

(3)

Special Characters and More Line Breaks

847

(2)

Unordered Lists

849

(1)

Nested and Ordered Lists

850

(3)

Internet and World Wide Web Resources

853

(5)

Bonus: Introduction to HyperText Markup Language 4: Part II

858

(33)

Introduction

859

(1)

Basic HTML Tables

859

(3)

Intermediate HTML Tables and Formatting

862

(2)

Basic HTML Forms

864

(3)

More Complex HTML Forms

867

(7)

Internal Linking

874

(2)

Creating and Using Image Maps

876

(3)

<meta> Tags

879

(1)

frameset Element

880

(2)

Nested framesets

882

(2)

Internet and World Wide Web Resources

884

(7)

Bonus: Cascading Style Sheets™ (CSS)

891

(32)

Introduction

892

(1)

Inline Styles

892

(1)

Creating Style Sheets with the style Element

893

(3)

Conflicting Styles

896

(3)

Linking External Style Sheets

899

(2)

Positioning Elements

901

(3)

Backgrounds

904

(3)

Element Dimensions

907

(2)

Text Flow and the Box Model

909

(5)

User Style Sheets

914

(4)

Internet and World Wide Web Resources

918

(5)

Bonus: Introduction to Python Programming

923

(62)

Introduction

924

(2)

A first Python program

925

(1)

Python keywords

926

(1)

Basic Data Types, Control Structures and Functions

926

(5)

Tuples, Lists and Dictionaries

931

(5)

String Processing and Regular Expressions

936

(5)

Exception handling

941

(2)

Introduction to CGI programming

943

(2)

Form Processing and Business Logic

945

(6)

951

(5)

Database Application Programming Interface (DB-API)

956

(4)

Setup

956

(1)

Simple DB-API program

956

(4)

Object-Oriented Programming

960

(2)

Case Study: GUI Database Application

962

(12)

Gadfly

962

(1)

Tkinter

963

(1)

Setup

963

(1)

GUI Database Viewer Implementation

964

(10)

Operator Precedence Chart

974

(1)

Internet and World Wide Web Resources

975

(10)

A HTML Special Characters

985

(1)

B HTML Colors

986

(3)

C ASCII Character Set

989

(1)

D Operator Precedence Chart

990

(3)

E Number Systems

993

(13)

E.1 Introduction

994

(3)

E.2 Abbreviating Binary Numbers as Octal Numbers and Hexadecimal Numbers

997

(1)

E.3 Converting Octal Numbers and Hexadecimal Numbers to Binary Numbers

998

(1)

E.4 Converting from Binary, Octal, or Hexadecimal to Decimal

998

(1)

E.5 Converting from Decimal to Binary, Octal, or Hexadecimal

999

(1)

E.6 Negative Binary Numbers: Two's Complement Notation

1000

(6)

F Career Resources

1006

(18)

F.1 Introduction

1007

(1)

F.2 Online Career Services

1008

(2)

F.3 Career Opportunities for Employees

1010

(4)

F.3.1 Comprehensive Career Sites

1010

(1)

F.3.2 Technical Positions

1010

(1)

F.3.3 Contracting Online

1011

(1)

F.3.4 Executive Positions

1012

(1)

F.3.5 Students and Young Professionals

1012

(1)

F.3.6 Other Online Career Services

1013

(1)

F.4 Online Opportunities for Employers

1014

(3)

F.4.1 Posting Jobs Online

1014

(1)

F.4.2 Diversity in the Workplace

1015

(1)

F.4.3 Recruiting Services

1016

(1)

F.4.4 Testing Potential Employees Online

1017

(1)

F.5 Internet and World Wide Web Resources

1017

(7)

G Perl 6 Web Resources

1024

(3)

G.1 Introduction

1024

(1)

G.2 Future of Perl

1024

(1)

G.3 Internet and World Wide Web Resources

1025

(2)

Bibliography

1027

(2)

Index

1029

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Perl How to Program : Introducing CGI and Python

Summary

Author Biography

Table of Contents

Supplemental Materials