Server side scripting, Languages used for server side scripting

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baabtra as a part of mentoring program. This is not
official document of baabtra –Mentoring Partner
Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt .
Ltd

3. What is server side scripting?
Different programming languages used in server side
scripting
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4. A ‘Simple’ Web Request
:
1 - Request an HTML Page
Web
Browser 4 - Present HTML Content
Web 3 - Return HTML to Browser
Server
 HTML 2 - Retrieve requested HTML

5. Static Web Pages
1. Client requests page
Internet
2. Web server sends the HTML file to the client
Web Server
Client Machine
With Web Browser
• A simple website is made up of one or more static HTML files. This means the page content does not change.
• The only way to update a page is for the author to edit the file.
• This is fine for small websites or those that require little updating.
• Static pages will not work for websites that need to deliver lots of custom and up-to-date content. Examples of these sites are:
•Shopping / auctions
•Discussion forums
•Search engines
•Online banking
•Blogs
•Web-based email

6. Dynamic Web Pages
• The facebook homepage could be
Static WebPage
considered static because it has a
fixed layout and content. It does not
change.
• After Login results page however is
dynamic. This means its content
can be changed.
• The only practical way to create this
page is by using a script, otherwise
facebook would have to create a
Dynamic WebPage
static results page in advance for
every single possible search.
• The user never sees the work a
script does, only the end result it
send back to their web browser.

7. What is server side scripting?
Its a technique used in web development,
which involves embedding scripts in
an HTML source code, which results in a
user's (client's) request to the server website
being handled by a script running server-
side, before the server responds to the
client's request.

8. How Scripting Languages Work
Server runs script
Client requests page [ ASP / PHP / Ruby ]
Script
Internet
Script builds
Completed HTML sent to client HTML code
Web Server HTML ready to send
HTML Code
Client Machine
With Web Browser
• The script, written by the website developer, generates the HTML code of the page requested.
• The HTML is not actually a file. The code is actually held in the server’s memory until it is sent directly to the client.
• A script may run other scripts, depending on its function. It will however still only give one end result.
• A website does not have to be completely made up of either scripts or HTML files. It can use a combination of the
two.z

9. Scripting Languages
• A script creates what appears to be a static web page using content
generated or read from a data source.
• There are many scripting languages, made by different companies and
organisations.
• The current most popular are ASP, PHP and Ruby on Rails.
• All are very powerful and work in slightly different ways.
• It does not matter what scripting language a website uses because there
are no compatibility issues with clients’ web browsers.
• The client only ever sees the final HTML generated by the script and not
the script itself.
• Scripts often finish running in several milliseconds. Most web servers can
run many scripts simultaneously with a minimal performance hit.

10. scripting languages with extension
ASP (*.asp)
ASP.NET (*.aspx)
C via CGI (*.c, *.csp)
ColdFusion Markup Language (*.cfm)
Java via JavaServer Pages (*.jsp)
JavaScript using Server-side JavaScript (*.ssjs, *.js)
Lua (*.lp *.op)
Perl CGI (*.cgi, *.ipl, *.pl)
PHP (*.php) - Open Source Scripting
Python, e.g. via Django (*.py)
Ruby, e.g. Ruby on Rails (*.rb, *.rbw)
SMX (*.smx)
Lasso (*.lasso)
WebDNA (*.dna,*.tpl)
Progress WebSpeed (*.r,*.w)

11. HISTORY
• Server-side scripting was first used in
early 1995 by Fred DuFresne while
developing the first web site for Boston,
MA television station WCVB.
• In the earlier days of the web, server-side
scripting was almost exclusively
performed by using a combination
of C programs, Perl scripts, and shell
scripts using the Common Gateway
Interface(CGI). Those scripts were
executed by the operating system.
• Many modern web servers can directly
execute on-line scripting languages such
as ASP and PHP either by the web server
itself or via extension modules

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