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Index: R

@related, references to related URLs: 14.5. CGI Gateway to XML Middleware

#REQUIRED keyword, XML documents: 14.3. Document Type Definition

radio buttons: 4.2.3.5. Radio buttons

random images, CGI script returning: 13.2.1. An Example

raw_cookie method: 11.3.1. Setting Cookies

RDF (Resource Definition Format)

web page information on: 14.5. CGI Gateway to XML Middleware

RDF (Resource Definition Format) tag, XML documents: 14.4. Writing an XML Parser

read and write access to data files, controlling: 8.5.3. File Permissions

reading, additional materials: A.2. Additional Reading

reading image (binary file) data: 13.2.1.1. binmode

reading in entire files (slurping): 17.1.4. Avoid Slurping

reading/writing DBM files, MLDBM module and: 10.2.2. MLDBM

read/write permissions, accessing for hash files: 10.2.1. DB_File

realm

authorization, specifying for: 2.4.2.10. WWW-Authenticate
logins, identifying in: 2.3.2.4. Authorization
protected, indicating with 401 status code: 3.3.1.3. Specifying status codes

recordset: 7.3.2. Example

constructing: 7.3.2. Example

RedHat Linux, Apache directory structure on: 1.4. Web Server Configuration

redirect method (CGI.pm): 5.3.1. Controlling HTTP Headers with CGI.pm

redirection

307 temporary redirect status code: 3.3.1.3. Specifying status codes

to absolute URLs: 3.3.1.2. Forwarding to another URL

client requests, status codes for: 2.4.2.7. Location

cookies, setting in: 11.3.2. Testing for Cookies

error messages to browser: 14.5. CGI Gateway to XML Middleware

15.2.4. Trap die
15.2.4. Trap die

to relative URLs: 3.3.1.2. Forwarding to another URL

server status codes for: 2.4.1. The Status Line

user requests to static HTML page: 3.3.1.2. Forwarding to another URL

references

cited in this book: A. Works Cited and Further Reading
to related URLs: 14.5. CGI Gateway to XML Middleware
strict rules for, using: 1.2.1. Sample CGI
symbolic, strict vs.: 15.2.1. Use strict

referencing current scriptname in tags: 14.5. CGI Gateway to XML Middleware

Referer field: 2.3.2.7. Referer

11.3.2. Testing for Cookies
CGI script for checking: 3.4.3. Restricting Image Hijacking

regex

extracting words greater than or equal to two characters for index: 12.3. Inverted Index Search
searching for query with: 12.2. Searching One by One, Take Two

regexp, finding HTML tags with: 12.3. Inverted Index Search

registered media types for the web (IANA registry): 2.4.2.3. Content-Type

registration forms

email addresses, collecting from users: 9.2. Email Addresses
example: 7.2.1.3. Validation example

regular expressions: 6.4.5.1. Embperl handler

checking email address against: 9.2.1. Validating Syntax
eval function, using with: 12.2.1. Regex-Based Search Engine
JavaScript support for: 7.2.1.3. Validation example
matching email addresses: 9.2.1. Validating Syntax
mod_perl, problems with: 17.3.2. mod_perl Considerations
performance, improving: 17.1.10. Regular Expressions
results, reassigning to $filename: 5.2.4. File Uploads with CGI.pm
search engine based on: 12.2.1. Regex-Based Search Engine
search requests, running through: 12.1. Searching One by One
XML tags, filtering out bad data in: 14.5. CGI Gateway to XML Middleware

relational database management system (RDBMS): 10. Data Persistence

CSV formatted data and: 10.1.5. DBD::CSV
SQL, using with (see SQL)

relative times: 5.3.1.3. Caching

relative URLs: 2.1.2. Absolute and Relative URLs

16.1.3. Use Relative URLs
full paths vs. relative paths: 2.1.2. Absolute and Relative URLs
redirecting to: 3.3.1.2. Forwarding to another URL

remote processes as servers: 14.1. Communicating with Other Servers

removing indentation, HTML here documents: 5.4.2. Here Documents

removing or replacing files, write permission and: 10.1.2. Write Permissions

removing word suffixes automatically: 12.3. Inverted Index Search

rename function (Perl): 5.2.4. File Uploads with CGI.pm

replies to email messages, constructing with formail: 9.7.1. Autoreply from nobody

Reply-To field, email messages: 9.3. Structure of Internet Email

request line: 2.2.2. HTTP Headers

2.3.1. The Request Line

request methods

case sensitivity in: 2.3.1. The Request Line

HEAD: 2.3.1.3. HEAD

METHOD attribute, specifying with: 4.2.2. The <FORM> Tag

options, browsers including in: 4.1. Sending Data to the Server

POST: 2.3.1.4. POST

POST and GET

mailing list signup form (example): 4.1. Sending Data to the Server

PUT and DELETE: 2.3.1.1. PUT and DELETE

resources not supporting: 3.3.1.3. Specifying status codes

request/response cycle (HTTP): 2.2.1. The Request and Response Cycle

content negotiation: 2.6. Content Negotiation
proxies, effect on: 2.5. Proxies

requests from clients: 11. Maintaining State

requests, HTTP: 2.3. Browser Requests

405 Not Allowed status header: 3.3.1.3. Specifying status codes

408 Request Timed Out status header: 3.3.1.3. Specifying status codes

alternatives to CGI for handling: 1.3.2. Alternatives to CGI

body: 2.2.1. The Request and Response Cycle

caching

problems with: 2.4.2.5. ETag
proxies and: 2.5. Proxies

CGI scripts, specifying for receiving: 4.2.2. The <FORM> Tag

client, identifying: 2.5.1. Identifying Clients

cookie header lines: 11. Maintaining State

encoding media types for: 4.2.2. The <FORM> Tag

generating with form submissions: 4.2.2. The <FORM> Tag

GET (see GET requests)

header field lines: 2.3.2. Request Header Field Lines

media types, listing preferred in headers: 2.6.1. Media Type

methods (see request methods)

server status codes for: 2.4.1. The Status Line

stateless or nonpersistent: 11. Maintaining State

timed out, 408 status code: 3.3.1.3. Specifying status codes

unique identifier, passing with: 11. Maintaining State

reset buttons: 4.2.3.7. Reset buttons

resources

content negotiation: 2.6. Content Negotiation
date and time of last update: 2.4.2.6. Last-Modified
dynamic, problems with caching: 2.5.2. Caching
entity tags for requested: 2.4.2.5. ETag
path information: 2.1.1. Elements of a URL
redirecting client request for: 2.4.2.7. Location
web: 2.1. URLs

responses, HTTP: 1.2. Introduction to CGI

2.4. Server Responses

alternatives to CGI for handling: 1.3.2. Alternatives to CGI

body: 2.2.1. The Request and Response Cycle

caching

problems with: 2.4.2.5. ETag
proxies and: 2.5. Proxies

categories, client capabilities for: 2.3.2.6. Accept

headers: 2.4.2. Server Headers

headers, server generation of: 3.3. CGI Output

response handlers: 17.3. mod_perl

restrictions, turning off in strict mode: 15.2.1. Use strict

return addresses (email messages), falsifying: 9.1.2. False Identities

revision control system, tracking changes to applications: 16.1.1. Plan for Future Growth

RFCs, information sources on: A.3. RFCs

root data structure, XML documents: 14.2. An Introduction to XML

14.4. Writing an XML Parser

root directory (server documents), separating from CGI script directory: 1.4.1.1. Configuring by directory

routing information, email: 9.3. Structure of Internet Email

overriding senders: 9.4.1. Command-Line Options

ROWS attribute: 4.2.5. The <TEXTAREA> Tag

rules for .procmailrc file: 9.7.1. Autoreply from nobody

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