Active Server Pages

1
Active Server Pages v.s. Java Server Pages
Presenters Lan Guo Qunying Fan
Pei-Xun Wu Date
02-11-2000
2
What is Active Server Pages(ASP)?

• Developed by Microsoft
• Server-side Script
• Executed in Web Server
• Response to user request

3
Which web server can run ASP?

• Windows Platform
• - Internet Information Server (IIS 3.0 5.0)
  for NT/2000
• - Personal Web Server for Win98
• Non-Windows Platform
• - Chilisoft ASP product for Unix variants

4
Structure of ASP(1/2)

• HTML Document
• Server-side Script
• Using lt gt Script element
• - ex. lt gt
• Using ltSCRIPTgt element
• - ex. ltSCRIPT RUNATSERVERgt - -
  lt/SCRIPTgt
• Support two (or more) Script Language
• VBScript (default)
• JScript
• switch by using lt_at_ LANGUAGE Jscript gt

5
Structure of ASP (2/2)

• Server-side Include
• - Including separate files by
• lt! -- INCLUDE FILEfilename -- gt
• or
• ltSCRIPT RUNATSERVER SRCfilenamegt
• lt./SCRIPTgt

6
Processing an ASP File

• ASP pages are .asp files
• Locate server-side code
• Compile server-side code by proper scripting
  engines
• Insert result to appropriate points into the
  page
• Send the page to IIS

7
ASP with Web Server
Web Server
ISAPI
Internet Serer Application Programming Interface
ASP DLL
ASP Script
Database
Scripting Engines
8
The Intrinsic ASP Objects (1/3)

• Response Object
• - used to access the response created to send
  back to client
• Application Object
• - created when ASP DLL is loaded
• - provide a repository for storing variables
  and object reference
• - available for all pages

9
The Intrinsic ASP Objects (2/3)

• Session Object
• - created for each visitor when they first
  request ASP page
• - remain available till default time out
• - store variables and object references
• - available only to the pages that this visitor
  opens
• Server Object
• - provide method and properties used in scripting
  with ASP
• ASPError Object
• - provide detail information about the last error
  occured

10
The Intrinsic ASP Objects (2/2)
Application Object
Session Object
Client
Request
Server
Response
Session Object
Server Object
Client
Request
Response
ASPError Object
11
ASP Performance Graphs
12
ASP Conclusion

• Completely embedded with HTML, Script
• No manually Compiling
• Object Oriented and can expand function of
  ActiveX
• Server Component
• Browser Compliant
• Code hiding
• Easily coding
• Efficiency