Server-side programming involves writing code that runs on a web server using languages like Java, PHP, and C#. It processes user input, displays pages, structures applications, and interacts with storage. Client-side programming writes code that runs in the user's browser using JavaScript. In a typical interaction, a user's browser requests a page from a server, which processes the request and returns the page which is then rendered in the browser. Common server-side programming languages and frameworks include PHP, Python, and ASP.Net. Web pages can be static with fixed HTML content or dynamic where the content changes based on server-side processing.

1. Server-side Programming
BEG275CO
A presentation by,
Aryan

2.  Server-side programming is writing code that runs on
the server, using languages supported by the server
(such as Java, PHP, C#; it is possible to write code that
executes on the server-side in JavaScript).
 Client-side programming is writing code that will run
on the client, and is done in languages that can be
executed by the browser, such as JavaScript
Server Side Programming

3. SSP example

4. ssp

5.  The User opens his web browser (the Client).
 The User browses to http://google.com.
 The Client (on the behalf of the User), sends a request
to http://google.com (the Server), for their home page.
 The Server then acknowledges the request, and replies the client with some
meta-data (called headers), followed by the page's source.
 The Client then receives the page's source, and renders it into a human
viewable website.
 The User types Stack Overflow into the search bar, and presses Enter
 The Client submits that data to the Server.
 The Server processes that data, and replies with a page matching the search
results.
 The Client, once again, renders that page for the User to view.
Example

6.  Server-side Programming
 Server-side programming, is the general name for the kinds of programs which are run
on the Server.
 Uses
 Process user input.
 Display pages.
 Structure web applications.
 Interact with permanent storage (SQL, files).
 Example Languages
 PHP
 Python
 ASP.Net in C#, C++, or Visual Basic.
 Nearly any language (C++, C#, Java). These were not designed specifically for the task,
but are now often used for application-level web services.
Server Side Programming

7.  Web client and server
 Types of web pages and its processing
 HTTP,HTTPs and HTTP transaction
 FTP and its types
 Overview of Tier Technology (3-Tier and N-Tier)
UNIT 1
Web Basic

8.  Called service requesters.
 Programs that run on users local computer for
sending request and receiving the response are called
web client.
Web Browsers

9.  Providers of the resources and services requested by
the client.
 E.g Email, Network printing.
Web server

10. Web pages and its processing

11.  Static web page
 Dynamic web page
There are mainly two types of web
pages

12.  Unchanged or constant.
 Contains the prebuilt content each time the web page
is loaded.
 Standard HTML web pages are static web page
 HTML defines the structure and content of the web
page.
 The content of HMTL will change only if the
developer updates and publishes the file.
 Extension for static web pages is .htm or .html
Static web page

13.  Changing content
 These web pages contain server code which allows to
change the content dynamically each time if the web
page loads.
 Web pages developed using the scripting language
such as PHP,ASP,JSP,ROR are dynamic web pages.
 Also called data base driven web pages.
 Extension for dynamic web page is .php,.apsx,.jsp
Dynamic web page

14.  Hypertext transfer prtocol,the underlying protocol
used by the world wide web.
 HTTP defines how message are transmitted and
formatted and what actions the web servers & web
browsers should take to response to various
commands.
 For eg. When we enter url in our web browser, this
actually sends a HTTP command to the web server
directing to fetch & transmit the requested web page.
HTTP

15.  HTTP is called stateless protocol because each
command is executed independently, without
knowledge of the commands that came before it
HTTP Contd..

16.  Similar to HTTP.
 Secure HTTP used by world wide web.
 Message are transmitted in encrypted form.
HTTPs

17.  Interaction between the HTTP client and HTTP server.
 Two way communication between client and server in
client server architecture.
 Two way communication is based on the Request-
Reply principle.
HTTP transaction

18.  File transfer protocol.
 For exchanging files over the internet.
 FTP works same ways as HTTP for transferring web
pages from a server to users browsers and SMTP for
transferring emails across the internet.
 Uses TCP/IP protocols to enable data transfer.
 Used for downloading files from the server and
uploading files to the server.
FTP

19.  FTP: Plain, unencrypted FTP that defaults over port 21.
Most web browsers support basic FTP.
 FTPS: SSL/TLS encrypted FTP that works just like
HTTPS. Security is enabled with SSL as soon as the
connection starts. The default FTPS port is 990. This
protocol was the first version of encrypted FTP
available, and while considered deprecated, is still
widely used. None of the major web browsers
support FTPS.
There are three types of FTP

20.  FTPES: FTP over SSL/TLS. This starts out as plain FTP over
port 21, but through special FTP commands is upgraded to
TLS/SSL encryption. This upgrade usually occurs before the
user credentials are sent over the connection. FTPES is a
somewhat newer form of encrypted FTP (although still
over a decade old), and is considered the preferred way to
establish encrypted connections because it can be more
firewall friendly. None of the major web browsers support
FTPES.
FTP types contd………

21.  One-tier architecture involves putting all of the required
components for a software application or technology on a
single server or platform. This kind of architecture is often
contrasted with multi-tiered architecture or the three-tier
architecture that's used for some Web applications and
other technologies where various presentation, business
and data access layers are housed separately.
 One-tier architecture is also known as single-tier
architecture.
One-Tier Architecture

22.  A two-tier architecture is a software architecture in
which a presentation layer or interface runs on a
client, and a data layer or data structure gets stored
on a server.
 Separating these two components into different
locations represents a two-tier architecture, as
opposed to a single-tier architecture. Other kinds of
multi-tier architectures add additional layers in
distributed software design.
Two-Tier Architecture

23.  Physical, Business and Data layer are physically separated.
 In software engineering, multi tier architecture (often
referred as n tier architecture) is a client server
architecture in which presentation, application processing
and data management functions are physically separated.
 Most wide spread use of multi tier architecture is three tier
architecture.
 N tier application architecture provides a model by which
developers create flexible and reusable application.
Overview of 3 Tier Technology

24. Thank You !!
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@
Email: aryan@sochware.com
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