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# Index: W

warnings
  Apache::Registry module, configuring to honor: 17.3.1. Installation and Configuration
  checking with -w flag: 15.3.1. Check Syntax
  mod_perl, use with: 17.3.2. mod_perl Considerations
  Perl syntax checker: 15.1.4. "Malformed" Header
  turning on in perl: 1.2.1. Sample CGI
WDDX (Web Distributed Data Exchange): 7.3.1. WDDX
  example: 7.3.2. Example
  SDK, downloading: 7.3.1. WDDX
web agent, writing with LWP: 14.1.3. LWP
web applications, creating with JavaScript: 7. JavaScript
web browsers
  caching: 2.5.2. Caching
    CGI script output: 5.3.1.3. Caching
    discouraging with Expires header: 13.2.1. An Example
  certificates, information about: 3.2.1. CGI Environment Variables
  checking for media formats supported (example script): 3.4.1. Check the Client Browser
  clients, representing: 14.1. Communicating with Other Servers
  compatibility with JavaScript bookmarklets: 7.4.1.1. Compatibility
  cookies
    handling standard for: 11.3. Client-Side Cookies
    with same name but different domains or paths, distinguishing: 11.3.1. Setting Cookies
  environment variables, providing: 3.2.2. Examining Environment Variables
  errors, server status codes for: 2.4.1. The Status Line
  fatal error messages, displaying: 5.5.2. CGI::Carp
    6.4.5.1. Embperl handler
    15.2.4. Trap die
  HTML display specifying for (lacking JavaScript support): 5.3.2.1. start_html
  HTTP and: 2. The Hypertext Transport Protocol
    request/response cycle: 2.2.1. The Request and Response Cycle
    requests: 2.3. Browser Requests
      4.1. Sending Data to the Server
  identification by servers, proxies and: 2.5. Proxies
  image format sepcifications: 2.6.1. Media Type
  invalid requests due to bad syntax: 3.3.1.3. Specifying status codes
  JavaScript 1.2, support for: 7.2.1.3. Validation example
  PNG images, support for: 13.1.2. PNG
  response from web server (example): 1.2. Introduction to CGI
  trusting, security risks of: 8.2.5. Trusting the Browser
    configurability of browsers: 8.2.5. Trusting the Browser
  URLs, saving as bookmarks: 7.4.1. Bookmarklet Basics
  User-Agent field, identifying with: 2.3.2.5. User-Agent
  variable values, dumping to: 15.3.4. Dumping Variables
  View Source option for HTML source code: 11.2. Hidden Fields
web document personalization with cookies: 11.3. Client-Side Cookies
web, history of: 1.1. History
web pages, embedding Java in: 1.3.2. Alternatives to CGI
web security, importance of: 8.1. The Importance of Web Security
web servers: 2.2.1. The Request and Response Cycle
  (see also servers)
  Apache web server, support for PHP language: 1.3.2. Alternatives to CGI
  cgi-bin diretory: 1.2. Introduction to CGI
  CGI programs
    configuring for: 1.4.1. Configuring CGI Scripts
  CGI scripts
    mapping virtual directory to: 1.2.2. Invoking CGI Scripts
  configuring for CGI: 1.4. Web Server Configuration
  copy running on a separate port for developers: 16.1.1. Plan for Future Growth
  decoding form input: 4.3. Decoding Form Input
  development, sharing by developers: 16.1.1. Plan for Future Growth
  hosts: 2.1.1. Elements of a URL
  name and version (Server field): 2.4.2.8. Server
  perl interpreter, embedding within: 1.3.2. Alternatives to CGI
  response to web browser (example): 1.2. Introduction to CGI
  status codes: 2.4.1. The Status Line
  users, running as: 9.4.1. Command-Line Options
  web site content, mapping to directories on: 16.1.2. Use Directories to Organize Your Projects
web sites
  enabling SSI for all .shtml files: 6.2.1. Configuration
  growth, CGI application development and: 16.1.1. Plan for Future Growth
  searching: 12. Searching the Web Server
    fgrep command: 12.1. Searching One by One
    grep command: 12.2. Searching One by One, Take Two
    inverted index search: 12.3. Inverted Index Search
well-formed XML documents, parsers and: 14.5. CGI Gateway to XML Middleware
whats_related.cgi script (example): 14.5. CGI Gateway to XML Middleware
while loops
  database records, returning with: 10.4.1.3. Database querying
  processing code, one line at at time: 17.1.4. Avoid Slurping
whitespace in code, guidelines for: 16.2. Coding Guidelines
wildcard characters
  globbing: 12.1. Searching One by One
  matches (*/*) in Accept header: 5.2.1.1. Accept
  in select command: 10.3.3. Accessing Data
Win32 from ActiveState: B.1.1. Installing Modules
  Perl debugger: 15.3.5.3. ActiveState Perl debugger
  using PPM: 10.4.1. Using DBI
Windows operating system
  carriage return line feed, (CRLF), use of: 3.3.1.1. Outputting documents
  ColdFusion language and: 1.3.2. Alternatives to CGI
  Netscape browsers sending paths to files as filenames: 5.2.4. File Uploads with CGI.pm
  Perl slowness vs. Unix: 1.3.1. Why Perl?
words
  index file, checking for previous occurrence of: 12.3. Inverted Index Search
  prefixes, removing: 12.3. Inverted Index Search
  suffixes, automatic removal of: 12.3. Inverted Index Search
world access bit, setting for CGI application execution: 15.1.1. Application Permissions
World Wide Web (see WWW)
WRAP attribute: 4.2.5. The <TEXTAREA> Tag
wrapped text in text boxes, placing: 13.4.1. GD::Text
write permission: 10.1.2. Write Permissions
writing chunks of data: 5.2.4. File Uploads with CGI.pm
writing XML parser: 14.4. Writing an XML Parser
WWW-Authenticate header: 2.3.2.4. Authorization
  2.4.2.10. WWW-Authenticate
  401 status code responses and: 3.3.1.3. Specifying status codes
WWW Consortium website for HTTP: 2. The Hypertext Transport Protocol

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