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Index: P

• #PCDATA: Document Type Definition
• packages
• • package function, declaring Perl module package: Custom Module
  • in Perl: Standard and Object-Oriented Syntax
• padding fields, character data types: Creating a Database
• param method: Accessing Parameters
• • Syntax
  • file upload element, using as file handle: File Uploads with CGI.pm
  • index keywords, retrieving: Index queries
  • uploaded files, accessing names of: File Uploads with CGI.pm
• parameters
• • clearing all: Modifying parameters
  • cookies: Setting Cookies
  • • restrictions applying to: Setting Cookies
  • email addresses, passing through shells as: Mailers and Shells
  • exporting to namespaces: Exporting Parameters to a Namespace
  • forms
  • • capturing to offline file: Running Scripts from the Command Line
    • CGI.pm module, prompting for: Running Scripts from the Command Line
    • passing as arguments to CGI scripts: Running Scripts from the Command Line
  • looping as conditions: Conditionals
  • modifying within CGI script: Modifying parameters
  • passing without equal sign (=): Decoding Form Input
• parent processes: fork and exec
• parentheses () after XML element names: Document Type Definition
• parse_form_data (example script): Decoding Form Input
• parsers
• • HTML static documents: HTML::Template
  • XML
  • • different ways of parsing: CGI Gateway to XML Middleware
    • syntax, simplicity of: An Introduction to XML
    • validation rules, separating from: Document Type Definition
    • writing: Writing an XML Parser
    • XML::Parser: CGI Gateway to XML Middleware
    • XML::Parser module: Document Type Definition
• parsing
• • CGI output with SSI: Server Side Includes
  • cookies with CGI.pm: Setting Cookies
  • HTML documents: An Introduction to XML
  • • inserting identifiers, code for: Query Strings and Extra Path Information
    • for links: Query Strings and Extra Path Information
    • for Perl code: Embperl
  • URL encoding: URL Encoding
  • XML documents
  • • tag and: Document Type Definition
    • without DTDs: Document Type Definition
• partial headers: Partial Headers
• • Location header: Forwarding to another URL
  • Status header: Specifying status codes
• passwords: WWW-Authenticate
• • 401 status code responses, asking for: Specifying status codes
  • attributes, password fields: Password fields
  • encrypted, in user file: Authorization
  • GET requests, including for: Password fields
  • Password element: Validating elements
  • password fields, representing with characters: Password fields
• paths
• • cgi in URL: Configuring by directory
  • default, Apache installation: Web Server Configuration
  • filenames, varying delimiters among operating systems: File Uploads with CGI.pm
  • filesystem, providing for files included in templates: Including other files
  • full, creating to files: Searching One by One, Take Two
  • full vs. relative in relative URLs: Absolute and Relative URLs
  • index: Search Application
  • • default: Inverted Index Search
    • specifying to: Inverted Index Search
  • invalid, to interpreted scripting languages: The Pound-Bang
  • to sendmail program from procmail: Autoreply from nobody
  • URLs: Elements of a URL
  • • Search Application
    • extra information, maintaining state with: Query Strings and Extra Path Information
    • for CGI scripts: Elements of a URL
    • passing unique identifiers as extra information: Maintaining State
    • protectedNews module (example): Authorization
    • relative vs. full: Absolute and Relative URLs
  • virtual paths: Configuring by directory
  • Windows system files, browser handling of: File Uploads with CGI.pm
• PATH_TRANSLATED environment variable: Query Strings and Extra Path Information
• PDF (Portable Document Format): PDF
• • Image::Magick module, support for: PDF and PostScript Support
• PDK (Perl Development Kit), obtaining from ActiveState website: ActiveState Perl debugger
• peformance, Perl CGI programs
• • Perl techniques for improving
  • • localizing variables with my: Localize Variables with my
    • SelfLoader module, using: SelfLoader
    • shell, avoiding: Avoid the Shell
    • slurping, avoiding: Avoid Slurping
    • undef vs. (): undef Versus ( )
• percent sign (%)
• • hashes, use of: Search Application
  • • CGI Gateway to XML Middleware
  • URL-encoded characters: Sending Data to the Server
  • • decoding: Decoding Form Input
    • representing: URL Encoding
• performance and temporary files, named vs. anonymous: Named temporary files
• performance, Perl CGI programs
• • Perl techniques for improving: Basic Perl Tips, Top Ten
  • • autouse feature: autouse
    • benchmarking code: Benchmark Your Code
    • benchmarking modules: Benchmark Modules, Too
    • existing solutions, finding: Find Existing Solutions for Your Problems
    • regular expressions, using: Regular Expressions
• period (.) or dash (-), starting filenames with: File Uploads with CGI.pm
• • File Uploads with CGI.pm
• perl interpreter: Alternatives to CGI
• • (see also interpreters)
  • embedding within web server: Alternatives to CGI
• Perl language
• • aliases for imported symbols: Standard and Object-Oriented Syntax
  • buffering output to STDOUT for web server: STDOUT
  • capitalization conventions: Coding Guidelines
  • CGI (see CGI programs, CGI)
  • chr function, converting hexadecimal values to characters: URL Encoding
  • coding techniques, avoiding bugs with: Perl Coding Techniques
  • • binmode, use of: Use binmode
    • checking status of system calls: Check Status of System Calls
    • file locking: File Locking
    • strict module, using: Use strict
    • unbuffering output stream: Unbuffer Output Stream
    • using with Tk via Tk.pm: ptkdb
  • commands in Embperl documents, surrounding with brackets: Embperl code blocks
  • data structures
  • • printing with Data::Dumper module: Dumping Variables
    • related URLs and subsequent related URLs: CGI Gateway to XML Middleware
  • data types (see data types)
  • DBI, using with: DBI
  • DBM files, storing as objects in: MLDBM
  • debugger: Debuggers
  • • ActiveState Perl debugger
    • (see also debugging)
    • ActiveState debugger: ActiveState Perl debugger
    • documentation for: The Perl debugger
  • default input record separator ($/): Inverted Index Search
  • embedding within Apache web server: mod_perl
  • Embperl module, shifting Perl code into HTML documents: Embperl
  • end-of-line characters, translating to \\\\n: File Uploads with CGI.pm
  • FastCGI and: Alternatives to CGI
  • forking: Security Strategies
  • functions vs. methods: Standard and Object-Oriented Syntax
  • grep function: Searching One by One, Take Two
  • here documents: Here Documents
  • libraries, storing in site_perl directory: Custom Module
  • linefeeds and carriage returns on different operating systems: Outputting documents
  • list vs. scalar context: Date
  • mailers: Perl Mailers
  • modules: Query Strings and Extra Path Information
  • • Perl Modules
    • Apache::ASP: Alternatives to CGI
    • CGIBook::UserTracker: Query Strings and Extra Path Information
    • creating your own: Custom Module
    • HTML::Mason module: Mason
    • LWP module: Trusting the Browser
    • open source: Why Perl?
    • standard Perl script vs.: Custom Module
    • WDDX.pm: WDDX
    • XML::Parser: Document Type Definition
  • newsgroups: Newsgroups
  • packages: Standard and Object-Oriented Syntax
  • performance of CGI scripts, improving: Basic Perl Tips, Top Ten
  • • autouse feature: autouse
    • benchmarking: Benchmark Your Code
    • existing solutions, finding: Find Existing Solutions for Your Problems
    • localizing variables with my: Localize Variables with my
    • regular expressions, using: Regular Expressions
    • SelfLoader module, using: SelfLoader
    • shell, avoiding: Avoid the Shell
    • slurping, avoiding: Avoid Slurping
    • undef vs. (): undef Versus ( )
  • pipes to external programs: User Input and the Shell
  • PPM (Perl Package Manager): Using DBI
  • printing, STDOUT and: Introduction to CGI
  • qq// operator: Here Documents
  • quotemeta function: Searching One by One, Take Two
  • scalar representations of array references: Decoding Form Input
  • STDERR, not buffering: STDERR
  • storage locations, different operating systems: The Pound-Bang
  • syntax errors, checking with -wc switch: "Malformed" Header
  • taint mode: Perl's Taint Mode
  • • common problems with: Common Problems with Taint Mode
    • data monitored by: What Is Monitored by Taint Mode
    • how it works: How Taint Works
    • reasons for using: Why Use Taint Mode?
    • removing taint: How Taintedness Is Removed
  • text files (see text files)
  • tie mechanism: flock
  • turning on warnings and taint checking: Sample CGI
  • underscore (_), use in: Coding Guidelines
  • version, getting with -v flag: The Pound-Bang
  • XML::Parser library, online information: CGI Gateway to XML Middleware
• perldoc (documentation viewer): perldoc
• PerlEx module: Efficiency and Optimization
• PerlMagick module (see Image::Magick module: PerlMagick
• permanent moves, URLs of requested resources: Specifying status codes
• permissions
• • applications, CGI errors and: Application Permissions
  • CGI programs
  • • checking: Application Permissions
    • configuring web server to set: The CGI Environment
    • execute, turning offf: Configuring by extension
    • forbidden (403 status code): Specifying status codes
  • email users, security risks of: False Identities
  • files
  • • changing with chmod command: Application Permissions
    • data storage: File Permissions
    • server running as user: Write Permissions
  • hash files, read/write: DB_File
  • text files, writing to: Write Permissions
• phone directory interface (consolidated), using CGI middleware: Middleware and XML
• PHP developing language: Alternatives to CGI
• physical text wrapping: The <TEXTAREA> Tag
• PID, checking for child processes: Is It Open?
• pie charts
• • commute_pie.cgi script: GD::Graph
  • creating with GD::Graph::pie module: GD::Graph
  • three dimensional, creating with GD::Graph::pie3d: GD::Graph3D
• pipes
• • email messages through Perl scripts: Forwarding to Another User
  • to external applications: Calling External Applications
  • • checking execution within: Is It Open?
    • mail clients: Mailers and Shells
    • replacing with fork: fork and exec
    • security risks: User Input and the Shell
  • opening to fgrep command for reading: Searching One by One
  • processes, checking status with kill function: Is It Open?
• pipes (|), delimiting files with: Delimiters
• plain buttons: Plain buttons
• plus sign (+)
• • encoding spaces in URLs: URL Encoding
  • keywords, separating in queries: Index queries
  • replacing spaces in URL text: Sending Data to the Server
  • XML elements: Document Type Definition
• PNG images: Check the Client Browser
• • Chart::PNGgraph: GD::Graph
  • converting to GIF or JPEG: Converting PNGs to GIFs or JPEGs
  • features, added over GIF: PNG
  • generating with GD module: Generating PNGs with GD
  • linking to HTML pages: Check the Client Browser
• point and line charts combination, creating with GD::Graph::linespoints module: GD::Graph
• point charts, creating with GD::Graph::points module: GD::Graph
• pointers to directories, CGI application organization and: Use Directories to Organize Your Projects
• port numbers: Elements of a URL
• • ommitting in URLs: Absolute and Relative URLs
• Portable Network Graphic image format (see PNG images)
• POSIX module: Named temporary files
• POST requests: POST
• • 300-level status code responses to: Specifying status codes
  • Content-length and Content-type fields: Content-Length
  • Content-length header, referring to: STDIN
  • form data to URLs with keywords: Index queries
  • limiting size of: Denial of Service Attacks
  • mailing list form (example): Sending Data to the Server
  • options, including in: Sending Data to the Server
  • query strings, accessing from URLs: Decoding Form Input
  • query strings and: POST and the query string
  • query_string method and: query_string
  • URL tampering and: Trusting the Browser
• PostScript image file format: PDF and PostScript Support
• pound-bang (#!) line: The Pound-Bang
• • -c flag and: Check Syntax
• PPM (Perl Package Manager): Using DBI
• Pragma: no-cache header: Restricting Image Hijacking
• pragmas
• • coding style guide, covering in: Coding Guidelines
  • depending on variable scope, Embperl module: Variable scope
• preferences for web document use, storing as cookies: Client-Side Cookies
• prefixes, removing from words: Inverted Index Search
• prepare command, passing SQL query to: Database querying
• print statements
• • generating HTML output with: Lots of print Statements
  • here documents: Sample CGI
• printenv command: Format
• printing
• • Embperl blocks: Embperl code blocks
  • HTTP headers in error handling: Error Subroutines
  • image files, determining increments: Check the Client Browser
  • multiple items in lists: Standard HTML Elements
  • Perl data structures with Data::Dumper: Dumping Variables
  • related URLs: CGI Gateway to XML Middleware
  • Set-Cookie header: Setting Cookies
  • status codes with Status header: Specifying status codes
  • to STDOUT: Introduction to CGI
  • • STDOUT
  • tag: Standard HTML Elements
  • variable values: Dumping Variables
• process identifier (PID): fork and exec
• processes
• • child processes
  • • checking PID of: Is It Open?
    • creating with pipe connected: fork and exec
  • creating separate to handle CGI scripts: Alternatives to CGI
  • local, as clients: Communicating with Other Servers
  • parent processes: fork and exec
  • in pipes, checking status with kill function: Is It Open?
  • remote, as servers: Communicating with Other Servers
• processing images, Image::Magick module: Image Processing
• procmail: procmail
• • forwarding email messages to another user: Forwarding to Another User
• program logic, bracket pairs in Embperl: Embperl code blocks
• developing in the large (see strategic developing)
• developing languages
• • ASP, support for: Alternatives to CGI
  • code file extensions: Internationalization
  • content negotiation and: Content Negotiation
  • exchanging data between: WDDX
  • interpreted languages, delays caused by: Efficiency and Optimization
  • negotiation for static documents: Internationalization
• programs, CGI
• • 503 Service Unavailable status responses: Specifying status codes
  • address tutorial: Address tutorial CGI script
  • application (example): Sample CGI
  • architectural guidelines (see architectural guidelines, CGI programs)
  • tutorialmarklets, using with: Bookmarklets and CGI
  • buffering, server handling of: Complete (Non-Parsed) Headers
  • configuring: Configuring CGI Scripts
  • • Configuring by extension
  • Content-type field, use in: Content-Type
  • cookies, testing for: Testing for Cookies
  • cookie_test.cgi script: Testing for Cookies
  • current_time.cgi script: Syntax
  • data, converting to JavaScript: WDDX
  • debugging (see debugging)
  • • ActiveState Perl debugger
    • common errors: Common Errors
    • debugging tools: Debugging Tools
    • Perl coding techniques for avoiding bugs: Perl Coding Techniques
  • development (see development, CGI programs)
  • • coding guidelines: Coding Guidelines
  • disabling file uploads and limiting POST request size: Denial of Service Attacks
  • dynamic generation of web server response: Introduction to CGI
  • efficiency and optimization: Efficiency and Optimization
  • • FastCGI, using: FastCGI
    • mod_perl, using: mod_perl
    • Perl techniques for: Basic Perl Tips, Top Ten
  • email, sending with: Sending Email
  • • email addresses: Email Addresses
    • procmail: procmail
    • security: Security
    • structure of Internet email: Structure of Internet Email
  • embedding output from: Executing CGI Programs
  • embpcgi.pl script: embpcgi.pl
  • encoding/decoding tab-delimited data and end-of-line characters: Delimiters
  • env_info.cgi script: Examining Environment Variables
  • • output: Examining Environment Variables
  • environment variables: Environment Variables
  • • examples: Sample CGI
    • listing for specific web server: Examining Environment Variables
  • examples: Examples
  • • image hijacking, restricting: Restricting Image Hijacking
    • image, sending after checking browser media formats: Check the Client Browser
    • user authentication and identification: User Authentication and Identification
  • feedback_sendmail.cgi script: Command-Line Options
  • file handles: File Handles
  • gateway to XML middleware: CGI Gateway to XML Middleware
  • graphic images, creating: Creating Graphics on the Fly
  • • image data, outputting: Outputting Image Data
    • mixed graphs (commute_mixed.cgi): GD::Graph
    • pie charts (commute_pie.cgi): GD::Graph
  • grep_search1.cgi script: Searching One by One
  • how they work: The Common Gateway Interface
  • HTML, alternatives for outputting: Alternatives for Generating Output
  • HTTP header lines, returning: Introduction to CGI
  • indexed_search.cgi script: Search Application
  • music_browser.cgi script: Example
  • output: CGI Output
  • • complete (non-parsed) headers: Complete (Non-Parsed) Headers
    • partial headers: Partial Headers
    • printing to STDOUT: STDOUT
  • parameters
  • • accessing: Accessing Parameters
    • modifying within: Modifying parameters
  • parse_form_data (example): Decoding Form Input
  • parsing HTML documents and inserting identifiers: Query Strings and Extra Path Information
  • permissions to run, forbidden (403) status code and: Specifying status codes
  • requests for static HTML page, handling
  • • unique identifiers: Query Strings and Extra Path Information
  • security: Security
  • • encryption: Encryption
    • trusting browsers: Trusting the Browser
    • user input, handling: Handling User Input
  • separate process, requirement for execution: Alternatives to CGI
  • shoppe.cgi: Hidden Fields
  • • checkout page: Hidden Fields
    • shopping cart page: Hidden Fields
    • welcome page: Hidden Fields
  • SSL/TLS connections and: HTTP
  • status codes: The Status Line
  • • Specifying status codes
  • strict command, advantages of use: Sample CGI
  • taint mode, reasons to use with: Why Use Taint Mode?
  • text files (see text files)
  • URLs for: Invoking CGI Scripts
  • • Elements of a URL
• projects, home pages for: Project Home Pages
• protected realm, indicating with 401 status code: Specifying status codes
• /protected (URL paths): Authorization
• protocol and version string (status line): Complete (Non-Parsed) Headers
• protocols
• • cookie handling by browsers: Client-Side Cookies
  • header (web server response), listing in: Introduction to CGI
  • HTTP (see HTTP)
  • IP (Internet Protocol): Environment Variables
  • SMTP: Perl Mailers
  • SSL (Secure Socket Layer)POST requests: HTTP
  • in URLs: Elements of a URL
• proxies: Proxies
• • image caching and: Restricting Image Hijacking
  • multiple users connecting via: Maintaining State
• ptkdb, PerlTk debugger: ptkdb
• PUT method: PUT and DELETE

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