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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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