SEMINAR AIBased WEB Applications

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SEMINARAI-Based WEB Applications

• CSC485

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Web page back end
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Definitions

• HTML HyperText Mark-up Language
• Front end forms to be filled by user
• CGI Common Gateway Interface
• Run on server
• Middleware between Web server Web client
• (usually Perl, C, C, Java, VB, PHP,
  Python)
• ASP Active Server Pages, JSP Java Server
  Pages
• Other types of middleware, easier in Windows
• Java Servlets another server-based middleware
• CGI also used for dynamic feedback to users and
  run on clients computer (ex validation of form
  fields)
• With scripts in Java applets, Javascript,
  VBscript, ActiveX controls
• HTTP HyperText Transfer Protocol
• Sending files from front(back)-end to
  back(front)-end

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Important Web sites

• Servers
• http//www.w3.org/Servers.html (1)
• http//www.mudhole.spodnet.uk.com/imp/authoring/r
  esource/servers/ (2)
• http//www.deerfield.com (3)
• PHP, XML, JSP, SQL
• http//www.php.net
• http//www.w3.org/TR/1998/NOTE-ice-19981026 XML
• http//www.javaworld.com JSP
• http//sqlcourse.com SQL
• http//builder.cnet.com/Programmng/JsTips/

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Important Web sites, contd

• Security
• http//www.microsoft.com/technet/security/tools.as
  p
• http//www.cookiecentral.com/
• http//www.lne.com/ericm/cookie_jar/

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Web Database Processing Architectures

• ISAPI Internet Server Application Programming
  Interface
• WSAPI Deerfields WebSite API (link 3)
• NSAPI NetScape API

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Relational Databases

• Flat-file, relational, object-oriented, hybrid
• Spread-sheets are flat-file DBs
• They are tables with fields in columns and
  records in rows that organize data in lists
• They are stored as tab-delimited files
• Relational DBs use the language SQL to define,
  access and manipulate data in DBs such as Oracle,
  Access, DB2, Sybase,
• The relations in the DB allow creating other
  tables from it that contain only pertinent data
  to one group or set of people.

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A Database
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Linked Databases
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Passwords, Cookies

• One of the form fields is an encrypted password
  field
• ltFORM ENCTYPE stypegt
• Cookies are server-side scripts (written in ISP,
  ASP or Perl) can store retrieve information
  from the clients computer

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• http//privacy.net/anonymizer
• http//www.zdnet.com/pcmag/stories/reviews Web
  portals
• http//www.w3.org/TR/2001/WD-xquery-20010215