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Index: H

• handlers
• • Apache/Perl, not implementing: Installation and Configuration
  • response handlers: mod_perl
• handles (see file handles)
• hard disk (client user), storing cookies on: Setting Cookies
• hash tables
• • DBM files and: DBM Files
  • tying to DBM file: DBM Files
  • untying from database files: DB_File
• hashes
• • command-line options, storing in: Inverted Index Search
  • of data or hash reference, subroutines returning: Decoding Form Input
  • elements, interpreting as attributes for HTML elements: Standard HTML Elements
  • hash algorithms, using to generate digests: Encryption
  • HTML::Template and: Loops
  • index file, binding to: Inverted Index Search
  • JavaScript, references to: start_html
  • meta tags, reference to: start_html
  • read/write basis for accessing: DB_File
• HEAD requests: HEAD
• header method
• • disabling caching with: Testing for Cookies
  • locating: Standard and Object-Oriented Syntax
• headers: Specifying status codes
• • (see also status headers)
  • CGI programs
  • • generating partial headers: Partial Headers
    • requesting no caching: Restricting Image Hijacking
  • email
  • • adding extra to: Command-Line Options
    • fields: Structure of Internet Email
  • environment variables for: CGI Environment Variables
  • HTML, CGI application errors and: "Malformed" Header
  • HTML tables, rows consisting of ... cells: Tables
  • HTTP: The Request and Response Cycle
  • • HTTP Headers
    • Server Responses
    • CGI scripts, declaring type of document output: Sample CGI
    • Cookie header: Setting Cookies
    • cookie header lines: Maintaining State
    • CRLF requirement: Outputting documents
    • environment variables, information on server and client: Environment Variables
    • error handling and: Error Subroutines
    • extensions: Cookies
    • fields: HTTP Headers
    • • Request Header Field Lines
    • formatting information in: Introduction to CGI
    • generating with CGI.pm module: Generating Output with CGI.pm
    • header and redirect methods, returning with: Controlling HTTP Headers with CGI.pm
    • media types, listing preferred: Media Type
    • request line: The Request Line
    • responses: Server Headers
    • separating from message body: Outputting documents
    • Set-Cookie: Setting Cookies
  • information in, web server response: Introduction to CGI
  • Internet email messages: Structure of Internet Email
  • malformed, CGI script errors: "Malformed" Header
• here documents: Here Documents
• • print statements: Sample CGI
• hexadecimal numbers
• • digests: MD5
  • HTTP characters, replacing: Sending Data to the Server
  • URL character encoding: URL Encoding
  • URL-encoded characters, decoding: Decoding Form Input
• hidden fields: Hidden fields
• • data, security risks in trusting: Trusting the Browser
  • feedback forms, email addresses in: False Identities
  • NAME and VALUE attributes in: Hidden fields
  • session information, storing in: Hidden Fields
  • tainted data in email addresses: False Identities
  • unique identifiers, storing in: Maintaining State
• hit counter (see access counters)
• home pages for projects: Project Home Pages
• Host field: Host
• hosts: Elements of a URL
• • in email addresses: Validating Syntax
  • including name in absolute URLs: Absolute and Relative URLs
  • ommitting in URLs: Absolute and Relative URLs
• HTML (Hypertext Markup Language
• • forms (see forms)
• HTML pages
• • headers and footers, maintaining across pages: Hidden Fields
  • link for JPEG or PNG images: Check the Client Browser
  • LWP module and: An Introduction to XML
  • static, forwarding user to: Forwarding to another URL
  • viewing Perl source code in: Dumping Variables
• HTML tag: Index queries
• HTML tags: The <FORM> Tag
• • Embperl module and: Syntax
  • formatting HTML::Template commands as: Syntax
  • forms: Form Tags
  • onChange handler, adding to: Validating elements
  • rules for basic: Standard HTML Elements
  • stripping from index material: Inverted Index Search
  • tag: end_html
• HTML templates: HTML Templates
• • env.tmpl file: Loops
  • global variables, defining with Embperl: Global Variables
  • reasons for using: Reasons for Using Templates
• HTML::Embperl module: Embperl
• • configuration: Configuration
  • example: Example
  • Execute function: Execute
  • global variables, defining for templates: Global Variables
  • meta-commands: Meta-commands
  • tables, automatic construction of: HTML Logic
  • website: Summary
• HTML::Mason module: Mason
• • component approach: Component Approach
• HTML::Parser module: Query Strings and Extra Path Information
• HTML::Template module: HTML::Template
• • commands: Syntax
  • • summary of: Syntax
  • conditionals, creating: Conditionals
  • CPAN information on: Summary
  • loops, creating: Loops
  • Mason module component approach vs.: Component Approach
  • param method: Syntax
• htpasswd utility: Authorization
• HTTP-Accept header
• • Accept method, evaluating content type for: Accept
• HTTP (Hypertext Transfer Protocol): The Hypertext Transport Protocol
• • authorization: Authorization
  • content negotiation: Content Negotiation
  • content type headers, malformed: "Malformed" Header
  • file uploads, handling with: File Uploads with CGI.pm
  • header/body message structure: The Request and Response Cycle
  • headers: HTTP Headers
  • • HTTP Headers
    • (see also headers)
    • generating with header method: Other headers
    • request line: The Request Line
  • HTTP Media Types specification: Other Specifications
  • messages, Internet email messages vs.: Structure of Internet Email
  • requests
  • • generating by submitting forms: The <FORM> Tag
    • global variables, undefining in Embperl: Variable scope
  • requests and responses: The Request and Response Cycle
  • response headers, server generation of: CGI Output
  • responses: Server Responses
  • server responses
  • • proxies, using for: Proxies
  • statelessness of: Maintaining State
  • status codes for errors: File Uploads with CGI.pm
  • transaction model: Maintaining State
  • URL characters, encoding: Sending Data to the Server
  • URLs: URLs
  • versions, 1.1 and 1.0: HTTP 1.1 and HTTP 1.0
  • WWW Consortium website for: The Hypertext Transport Protocol
  • XML data, ease of transporting: An Introduction to XML
• http method (CGI.pm), returning HTTP_environment variables with: http
• HTTP requests
• • creating and sending from within Perl with LWP module: Trusting the Browser
  • static HTML page, handling with CGI script
  • • unique identifiers: Query Strings and Extra Path Information
• HTTP_COOKIE environment variable: Setting Cookies
• httpd.conf, DirectoryIndex and AddType directives: Configuration
• HTTP_HOST environment variable: virtual_host
• HTTP_REFERER variable: Trusting the Browser
• • Testing for Cookies
• https: Elements of a URL
• • connections using SSL or TLS: Encryption
  • HTTPS environment variables: CGI Environment Variables
  • • https
• Hypertext Transfer Protocol (see HTTP)
• hyphens (-), attribute names: Standard HTML Elements

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