Introduction ASP

Oct 13, 2013Download as PPTX, PDF1 like3,228 views

This document provides an overview of Active Server Pages (ASP) programming. It discusses the differences between client-side and server-side script processing. Client-side processing occurs on the user's computer browser using JavaScript, while server-side processing occurs on the web server using ASP scripts like VBScript. Server-side processing allows data to be stored in databases and controls user access, while client-side processing is faster but cannot retain global data. The document also reviews ASP implementation using IIS servers, and the Request and Response objects used to access information passed between the client and server.

INTERNET
PROGRAMMING
ACTIVE SERVER PAGE
(ASP)

INTRODUCTION
SCRIPT
PROCESSING

Client Side
Meaning: Processing
that are conducted at
the user’s
computer(browser)

Server Side
Hardware

Software
Script used: JavaScript

Web server  Internet
Information
Services(IIS)

Script used: ASP  VBscript

CLIENT SIDE
PROCESSING

Advantages

Disadvantages

Faster to display
output since workload
is distributed to user’s
PC

Cannot retain global
data

Customizeable output
– personalized
experienced

Cannot store data
from user into
database

SERVER SIDE
PROCESSING

Advantages

Data from user can be stored
into database. Eg: order,
reservation, feedback.

Web server controls user’s
browsing selection. Eg: If
certain pages are off-limit to
ordinary users, server-side
scripting can be employed to
block the pages from being
viewed by the user.

Disadvantages

The processing is centered at
the server  will put burden
of processing on the server
instead of the client.

IMPLEMENTING SERVER-SIDE
SCRIPTING (ISS)
• Web browser
request an ASP file
from the server

IIS

ASP
MODULE

IIS sends plain
HTML file to be
displayed in the
web browser

WWW
services

FTP
services

Gopher
Services

• Provide simple
document(textbase)over the
internet

a web page that is
processed by a web
server

a program that
runs inside a web
server (IIS/PWS)

What
is ASP

a Microsoft
Technology
Scripts in an ASP
file are executed
on the server

ISI
is Internet
Information
Services comes
as a free
component with
Windows 2000 &
Windows NT 4.0
option pack

PWS
is Personal
Web Page, a
smaller scale
version but
fully function
like IIS

JavaScript vs. VBScript
JavaScript is
larger and
more complex
language than
VBScript

JavaScript is, in
some ways, more
powerful than
VBScript

JS is an open
protocol. VBScript
is not

JavaScript
vs.
VBScript

JavaScript is more aware of
HTML than VBScript and has
numerous formatting and
parsing methods for creating
and analyzing HTML tags

JS is case
sensitive.
VBScript is
not

Basic ASP Scripting Style
It begins with
(for JavaScript)
<%@language=
JavaScript%>

we must put tag

<%…………%>
and start writing
code between
the tags

Server side scripting is
a script that is
executed by the web
server, then the results
of which are passed on
to the calling client

STYLE OF WRITING SCRIPTS

indicate inline server
side script in your page
by placng the
programming
statements between the
following tags <% %>

WRITING
INLINE
SCRIPTS
server side scripting
engine in the order that
it appears in the ASP
page executes the script

INTERPERSING
INLINE
SCRIPTS

intersperse inline
script within an ASP

The script is
executed in the
order in which it is
encountered

Working
with ASP
Object
Response object

Server object

Use to access
information
passed by HTTP
requestc

Use to access methods
and properties on the
server

Request object
Used to control the
information sent to
the client

Analogy
The best way to understand these two objects is to think of a
telephone call.
When u place a call, u are requesting that someone on the
other end of the line pick up the phone.
When that person answers the phone, he/she issues a response
to your request (the ringing phone).

Depending on what the person says, you process the results of
your request by taking specific actions depending on whom you
are talking to and for what purpose.

Request Object Collection
Client Certificate

• User certificate is required for
access to the page

Cookies

• Cookies are sent to the server for
examination

Form

• Takes all values passed by html form

QueryString

• Makes available to the web server all
values contained

Server Variables

• Makes available all the HTTP header values
as sent by the user with the request.

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Introduction ASP

1. INTERNET PROGRAMMING ACTIVE SERVER PAGE (ASP)

2. INTRODUCTION SCRIPT PROCESSING Client Side Meaning: Processing that are conducted at the user’s computer(browser) Server Side Hardware Software Script used: JavaScript Web server  Internet Information Services(IIS) Script used: ASP  VBscript

3. CLIENT SIDE PROCESSING Advantages Disadvantages Faster to display output since workload is distributed to user’s PC Cannot retain global data Customizeable output – personalized experienced Cannot store data from user into database

4. SERVER SIDE PROCESSING Advantages Data from user can be stored into database. Eg: order, reservation, feedback. Web server controls user’s browsing selection. Eg: If certain pages are off-limit to ordinary users, server-side scripting can be employed to block the pages from being viewed by the user. Disadvantages The processing is centered at the server  will put burden of processing on the server instead of the client.

5. IMPLEMENTING SERVER-SIDE SCRIPTING (ISS) • Web browser request an ASP file from the server IIS ASP MODULE IIS sends plain HTML file to be displayed in the web browser

6. WWW services FTP services Gopher Services • Provide simple document(textbase)over the internet

7. a web page that is processed by a web server a program that runs inside a web server (IIS/PWS) What is ASP a Microsoft Technology Scripts in an ASP file are executed on the server ISI is Internet Information Services comes as a free component with Windows 2000 & Windows NT 4.0 option pack PWS is Personal Web Page, a smaller scale version but fully function like IIS

8. JavaScript vs. VBScript JavaScript is larger and more complex language than VBScript JavaScript is, in some ways, more powerful than VBScript JS is an open protocol. VBScript is not JavaScript vs. VBScript JavaScript is more aware of HTML than VBScript and has numerous formatting and parsing methods for creating and analyzing HTML tags JS is case sensitive. VBScript is not

9. Basic ASP Scripting Style It begins with (for JavaScript) <%@language= JavaScript%> we must put tag <%…………%> and start writing code between the tags Server side scripting is a script that is executed by the web server, then the results of which are passed on to the calling client

10. STYLE OF WRITING SCRIPTS indicate inline server side script in your page by placng the programming statements between the following tags <% %> WRITING INLINE SCRIPTS server side scripting engine in the order that it appears in the ASP page executes the script

11. INTERPERSING INLINE SCRIPTS intersperse inline script within an ASP The script is executed in the order in which it is encountered

12. Working with ASP Object Response object Server object Use to access information passed by HTTP requestc Use to access methods and properties on the server Request object Used to control the information sent to the client

13. Analogy The best way to understand these two objects is to think of a telephone call. When u place a call, u are requesting that someone on the other end of the line pick up the phone. When that person answers the phone, he/she issues a response to your request (the ringing phone). Depending on what the person says, you process the results of your request by taking specific actions depending on whom you are talking to and for what purpose.

14. Request Object Collection Client Certificate • User certificate is required for access to the page Cookies • Cookies are sent to the server for examination Form • Takes all values passed by html form QueryString • Makes available to the web server all values contained Server Variables • Makes available all the HTTP header values as sent by the user with the request.

Introduction ASP

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