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Index: E

$element, start element name (XML): 14.5. CGI Gateway to XML Middleware

$expat, reference to XML::Parser object: 14.5. CGI Gateway to XML Middleware

e-commerce: 1.1.1. How CGI Is Used Today

echo command: 6.2.2. Format

6.2.3. Environment Variables

ECMAScript, standardizing JScript/JavaScript language: 7.1.1. History

efficiency and optimization, CGI programs: 17. Efficiency and Optimization

FastCGI, using: 17.2. FastCGI
mod_perl, using: 17.3. mod_perl
Perl techniques for: 17.1. Basic Perl Tips, Top Ten

Electronic Frontier Foundation, web site search: 14.4. Writing an XML Parser

element.focus(): 7.2.1.1. Validating elements

elements

HTML

generating with CGI.pm methods: 5.3. Generating Output with CGI.pm

5.3.3. Standard HTML Elements

HTML forms

Embperl, creating automatically: 6.4.3.3. Form input elements

generating with CGI.pm methods: 5.3.4. Form Elements

name/value associations: 4.1. Sending Data to the Server

validating with JavaScript: 7.2.1.1. Validating elements

7.2.1.3. Validation example

quoted, in email addresses: 9.2.1. Validating Syntax

XML

attributes, defining: 14.3. Document Type Definition
character data, containing: 14.3. Document Type Definition
tags: 14.3. Document Type Definition

else command: 6.2.2. Format

email: 9. Sending Email

addresses: 9.2. Email Addresses

overriding senders: 9.4.1. Command-Line Options
validating (code example): 9.2.1. Validating Syntax
validating syntax: 9.2.1. Validating Syntax

mailx and mail programs: 9.5. mailx and mail

Perl mailers: 9.6. Perl Mailers

Net::SMTP module, sending directly through SMTP: 9.6. Perl Mailers

procmail program: 9.7. procmail

security: 9.1. Security

false identities: 9.1.2. False Identities
mailers and shells: 9.1.1. Mailers and Shells

similarity to HTTP message format: 2.2.2. HTTP Headers

spamjunk email (see spam)

structure of Internet email: 9.3. Structure of Internet Email

email services, interprocess communication and: 14.1. Communicating with Other Servers

Embperl module: 6.4. Embperl

bracket pairs for blocks of code: 6.4.2.1. Embperl code blocks
configuration: 6.4.1. Configuration
embpcgi.pl CGI script: 6.4.1.3. embpcgi.pl
escaping HTML generated by Perl blocks: 6.4.5.1. Embperl handler
global variables, defining for HTML templates: 6.4.4. Global Variables
Mason module component approach vs.: 6.5.1. A Component Approach
meta-commands: 6.4.2.3. Meta-commands
news, current headlines and articles (example): 6.4.5. Example
tables, automatic contstruction of: 6.4.3. HTML Logic
website: 6.4.6. Summary

EMPTY keyword, XML element definitions: 14.3. Document Type Definition

empty lists: 15.2.1. Use strict

enclosing final attribute, SSI: 6.2.7. Common Errors

encoding

Authorization field characters: 2.3.2.4. Authorization

content negotiation and: 2.6. Content Negotiation

content negotiaton, support for: 2.6.3. Encoding

forms

application/x-www-form-urlencoded: 4.1. Sending Data to the Server
multipart/form-data: 4.1. Sending Data to the Server

space, separating query string arguments: 2.1.1. Elements of a URL

specifying media type for HTTP request: 4.2.2. The <FORM> Tag

tab-delimited data and end-of-line characters: 10.1.4. Delimiters

URLs: 2.1.3. URL Encoding

4.3. Decoding Form Input

encryption: 8.3. Encryption

ENCTYPE attribute: 4.2.2. The <FORM> Tag

__END__ and __DATA__: 17.3.2. mod_perl Considerations

END blocks

mod_perl, treatment of: 17.3.2. mod_perl Considerations
removing temporary filenames: 10.1.3.2. Named temporary files

end-of-file character, operating systems: 15.3.3. Running Scripts from the Command Line

end-of-line characters: 5.2.4. File Uploads with CGI.pm

(see also \\\\n; newlines)
binmode function and: 13.2.1.1. binmode
encoding/decoding, functions for: 10.1.4. Delimiters
tab file delimiters and: 10.1.4. Delimiters
translating to \\\\n: 5.2.4. File Uploads with CGI.pm

end_html method (CGI.pm): 5.3.2.2. end_html

endif command: 6.2.2. Format

ending bracket pair: 6.4.2.1. Embperl code blocks

ending HTML documents: 5.3.2. Starting and Ending Documents

entity tags: 2.4.2.5. ETag

environment, CGI: 3. The Common Gateway Interface

environment variables: 1.2. Introduction to CGI

CGI, CGI.pm environment methods and: 5.2.1. Environment Information

CGI scripts: 3.2. Environment Variables

examples of: 1.2.1. Sample CGI

%ENV hash: 3. The Common Gateway Interface

3.2. Environment Variables

%env_info hash, naming and describing with: 3.2.2. Examining Environment Variables

generating with env_tmpl.cgi script: 6.3.1.1. Loops

HTTP_prefix, http method and: 5.2.1.2. http

HTTPS_, returning with https method: 5.2.1.3. https

inserting into HTML documents with SSI commands: 6.2.3. Environment Variables

less common CGI environment variables: 3.2.1. CGI Environment Variables

secure servers, adding for secure connections: 3.2.1. CGI Environment Variables

self_url method and: 5.2.1.5. self_url

SERVER_PROTOCOL: 3.3.2. Complete (Non-Parsed) Headers

servers, listing for: 3.2.2. Examining Environment Variables

setting manually before running scripts: 15.3.3. Running Scripts from the Command Line

SSI pages, available to: 6.2.3. Environment Variables

standard CGI environment variables: 3.2.1. CGI Environment Variables

tainted data, checking for: 8.4.1. How Taint Works

web server administrators, adding to configuration files: 3.2.1. CGI Environment Variables

env.tmpl (HTML template): 6.3.1.1. Loops

env_tmpl.cgi script: 6.3.1.1. Loops

equal sign (=)

name/value pair separator: 2.1.1. Elements of a URL

15.3.3. Running Scripts from the Command Line

parameters, passing without: 4.3. Decoding Form Input

error messages

cgi_error method, returning: 5.2.4. File Uploads with CGI.pm

errors

500 Internal Server Error: 3.3. CGI Output

3.3.1.3. Specifying status codes

400-level status code responses and: 3.3.1.3. Specifying status codes

CGI programs: 15.1. Common Errors

application permissions: 15.1.1. Application Permissions
Perl coding techniques for avoiding: 15.2. Perl Coding Techniques
pound-bang (#!) line: 15.1.2. The Pound-Bang

common, Server Side Includes: 6.2.7. Common Errors

error messages

CGI.pm objects: 5.2.4. File Uploads with CGI.pm

customizing: 6.2.4. Tailoring SSI Output

redirecting to browser: 6.4.5.1. Embperl handler

14.5. CGI Gateway to XML Middleware
15.2.4. Trap die

status codes and: 3.3.1.3. Specifying status codes

handling: 5.5. Handling Errors

CGI::Carp module: 5.5.2. CGI::Carp
die function: 5.5.1. Dying Gracefully
error subroutine, exporting: 5.5.4. Custom Module
subroutines: 5.5.3. Error Subroutines

output to STDERR, handling by servers: 3.1.1.3. STDERR

Perl and CGI scripts, preventing with strict module: 15.2.1. Use strict

server error logs, checking: 15.3.2. Check Error Logs

server status codes for: 2.4.1. The Status Line

SQL submission: 10.4.2.1. Address book database creation script

static HTML document for general errors: 3.4.1. Check the Client Browser

system commands, checking status for: 15.2.2. Check Status of System Calls

transfer errors in file uploads: 5.2.4. File Uploads with CGI.pm

XML::Parser module and: 14.5. CGI Gateway to XML Middleware

escape characters, functions for encoding in text files: 10.1.4. Delimiters

escaping

@ prefix with backslash (\\\\) character: 13.5.4. Image Processing
~! (tilde escapes), mailx and mail programs: 9.5. mailx and mail
backslash (\\\\), using: 10.1.4. Delimiters
characters with quotemeta function: 12.2. Searching One by One, Take Two
double quotes with backslash (\\\\): 5.4.1. Lots of print Statements
HTML generated by Perl blocks (Embperl): 6.4.5.1. Embperl handler
url_escape and url_unescape functions: 2.1.3. URL Encoding

ETag (entity tag) field: 2.4.2.5. ETag

eval function, evaluating user-specified regex: 12.2.1. Regex-Based Search Engine

event-based parsers: 14.5. CGI Gateway to XML Middleware

exclusive file locks: 10.1.1.1. flock

exec command: 8.2.4. fork and exec

mail program, using with: 9.5. mailx and mail

SSI: 6.2.1. Configuration

6.2.2. Format
exec cgi directive: 6.2.6. Executing CGI Programs

system: 15.1.2. The Pound-Bang

ExecCGI option, disabling: 1.4.1.2. Configuring by extension

executable files, CGI scripts as: 1.2.2. Invoking CGI Scripts

execute bit: 10.1.2. Write Permissions

execute command, starting SQL query with: 10.4.1.3. Database querying

execution

CGI programs

creating separate processes for: 1.3.2. Alternatives to CGI
disallowing while enabling exec command: 6.2.1. Configuration
file locking and: 10.1.1.1. flock
permissions, turning off for directories: 1.4.1.2. Configuring by extension
world access bit, setting for: 15.1.1. Application Permissions

combining with compilation in perl: 1.3.1. Why Perl?

external applications: 6.2.1. Configuration

HTML::Embperl module, Execute function: 6.4.1.1. Execute

Perl CGI programs, delays caused by interpreter: 17. Efficiency and Optimization

existing solutions to problems, finding: 17.1.9. Find Existing Solutions for Your Problems

exit command, use with mod_perl: 17.3.2. mod_perl Considerations

expiration time, setting for HTML documents: 5.3.1.3. Caching

Expires headers: 13.2.1. An Example

Exporter module, exporting error subroutine with: 5.5.4. Custom Module

exporting functions: 5.1.3. Standard and Object-Oriented Syntax

expressions: 8.4.1. How Taint Works

(see also regular expressions)
simple, bracket pairs enclosing (Embperl): 6.4.2.1. Embperl code blocks
tainted values in: 8.4.1. How Taint Works

extensions, HTTP request headers: 2.3.2.8. Cookies

external applications

calling: 8.2.1. Calling External Applications

pipes, opening to: 8.2.1. Calling External Applications

executing and including output in HTML documents: 6.2.1. Configuration

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