101. | CGI Programming with Perl

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identifying clients: 2.5.1. Identifying Clients

identifying users, script for: 3.4.2. User Authentication and Identification

identity encoding: 2.6.3. Encoding

if block (CGI script), describing actions of: 10.4.2.2. Address book CGI script

if, elif command: 6.2.2. Format

image buttons: 4.2.3.8. Image buttons

supporting as submit buttons: 5.2.2.4. Supporting image buttons as submit buttons

image formats (new and uncommon), browser specification of: 2.6.1. Media Type

image_fetch.cgi script (example): 3.4.1. Check the Client Browser

image/jpeg content type: 2.6.1. Media Type

13.5.4. Image Processing

Image::Magick module: 13.5. PerlMagick

image file formats, working with

PDF and PostScript: 13.5.3. PDF and PostScript Support

image processing with: 13.5.4. Image Processing

ImageMagick library

installation: 13.5.1. Installation
operations supported by: 13.5. PerlMagick

LZW compression, enabling: 13.5.1.2. Enabling LZW compression

requirements for use: 13.5.1.1. Requirements

images

data, outputting: 13.2. Outputting Image Data

dynamic images outputting: 13.2.2. Including Dynamic Images in HTML
random images, CGI script returning: 13.2.1. An Example

file formats: 13.1. File Formats

GIF: 13.1.1. GIF
Image::Magick module, working with: 13.5.1.2. Enabling LZW compression
JPEG: 13.1.3. JPEG
PDF: 13.1.4. PDF
PNG: 13.1.1.1. The LZW patent
PostScript, Image::Magick and: 13.5.3. PDF and PostScript Support

hijacking of, restricting (CGI script): 3.4.3. Restricting Image Hijacking

Image::Magick module, processing with: 13.5.4. Image Processing

include command: 6.2.2. Format

6.2.6. Executing CGI Programs
6.3.1.3. Including other files

increments for image file printing, determining: 3.4.1. Check the Client Browser

indentation

coding style guide, covering in: 16.2. Coding Guidelines

HTML here documents: 5.4.2. Here Documents

unindent subroutine: 5.4.2. Here Documents

index queries: 5.2.2.3. Index queries

INDEX_DB constant: 12.3.1. Search Application

indexes: 2.1.1. Elements of a URL

2.1.1. Elements of a URL

(see also query strings)

-cache option: 12.3. Inverted Index Search

CGI application to search: 12.3.1. Search Application

current column and row, using as array indices: 6.4.3.1. Tables

directory, specifying for files to be indexed: 12.3. Inverted Index Search

file, binding with %index hash: 12.3.1. Search Application

inverted index search: 12.3. Inverted Index Search

lowercase (case-insensitive), specifying: 12.3. Inverted Index Search
stripping HTML tags from material: 12.3. Inverted Index Search

numbers, skipping: 12.3. Inverted Index Search

stop words, specifying file containing: 12.3. Inverted Index Search

word suffixes, removing: 12.3. Inverted Index Search

words, checking for previous occurrence of: 12.3. Inverted Index Search

index.html

getting full path with PATH_TRANSLATED variable: 11.1. Query Strings and Extra Path Information

information servers: 7.3. Data Exchange

input

handling with CGI.pm module: 5.2. Handling Input with CGI.pm

from users

removing taint from: 8.4.3. How Taintedness Is Removed
security and: 8.2. Handling User Input
shell and: 8.2.2. User Input and the Shell
tainted data, checking for: 8.4.1. How Taint Works

input elements (forms), Embperl creation of: 6.4.3.3. Form input elements

input, forms

decoding: 4.3. Decoding Form Input

input record separator (default), Perl: 12.3. Inverted Index Search

input validation, forms: 7.2.1. Input Validation

CGI script, re-validating client data with: 7.2.1.4. Validating twice

example: 7.2.1.3. Validation example

formLib.js file: 7.2.1.3. Validation example
input_validation.html file: 7.2.1.3. Validation example

submits: 7.2.1.2. Validating submits

validating elements: 7.2.1.1. Validating elements

inserting data into databases: 10.3.2. Inserting Data

installation

Apache server, default paths: 1.4. Web Server Configuration
FastCGI: 17.2.1. Installing FastCGI
GD module: 13.3.1. Installation
GD::Graph3d, documentation and additional graph types: 13.4.3. GD::Graph3D
ImageMagick library: 13.5.1. Installation
mod_perl: 17.3.1. Installation and Configuration
modules, CPAN: B.1.1. Installing Modules

interactive debuggers: 15.3. Debugging Tools

Perl, invoking with -d flag: 15.3.5.1. The Perl debugger

interface for outputting HTML, CGI.pm module: 5.1.2. The Kitchen Sink

internal redirect: 3.3.1.2. Forwarding to another URL

internationalization: 2.6.2. Internationalization

Internet email: 11.2. Hidden Fields

(see also email)
sending with Perl mailers: 9.6. Perl Mailers
sendmail, use of: 9.4. sendmail
similarity to HTTP message formats: 2.2.2. HTTP Headers
structure of: 9.3. Structure of Internet Email

Internet, history of: 1.1. History

Internet Protocol (see IP)

interpreters

delays in executing Perl CGI applications: 17. Efficiency and Optimization
multiple, referencing correct: 15.1.2. The Pound-Bang
perl interpreter, embedding inside web server: 1.3.2. Alternatives to CGI
pound-bang (#!) line and: 15.1.2. The Pound-Bang

interprocess communication (IPC).: 14.1. Communicating with Other Servers

invalid HTTP content type headers: 15.1.4. "Malformed" Header

inverted index: 12.3. Inverted Index Search

invoking CGI scripts: 1.2.2. Invoking CGI Scripts

IO::File module: 10.1.3.1. Anonymous temporary files

IO::Socket module: 14.1.2. IO::Socket

IP (Internet Protocol)

addresses

hosts, identifying: 2.1.1. Elements of a URL
hosts, identifying socket in: 14.1.1. Sockets
multiple domain names mapped to single: 2.3.2.1. Host
remote host, obtaining from environment variables: 1.2.1. Sample CGI

information, displaying with SSI: 6.2.3. Environment Variables

iPlanet Enterprise Server, buffering output: 3.1.1.2. STDOUT

3.3.2. Complete (Non-Parsed) Headers

ISO Latin 1 character set, URL encoding: 2.1.3. URL Encoding

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