presentation on web services

1. Program : B.Tech, CSE,VIII Semester, IV Year
CS-802 (B):Cloud Computing
Topic: Web services
Jan-June, 2023
Activity-I
Submitted to:- Submitted by:-
Asst. Prof. Roll no.:-
Department of CSE

2. Outlines
• Introduction
• Architecture
• Working
• Types
• Advantages
• Disadvantages

3. Web Services
• On the World Wide Web, a web service is a standardized
method for propagating messages between client and server
applications.
• A web service is a software module that is intended to carry out
a specific set of functions.
• The web service would be able to deliver functionality to the
client that invoked the web service.
• Web Services can convert your application into a Web-
application which can publish its function or message to the
rest of the world.

4. Architecture

5. • Service Provider - From an architectural perspective,
it is the platform that hosts the services.
• Service Requestor - Service requestor is the
application that is looking for and invoking or initiating
an interaction with a service. The browser plays the
requester role, driven by a consumer or a program
without a user interface.
• Service Registry - Service requestors find service and
obtain binding information for services during
development.
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6. Working

7. • Web-Service functions as a request-response pattern that
empowers communication among different applications.
• An element will request some support of its partner to be a
specific specialist service provider. Upon demand, the specialist
co-op will react with a reaction message. So, there are two
messages included one Request message (XML)and one
Response message (XML).
• An administration utilizes XML to label information, SOAP to
move a message lastly, WSDL to depict the accessibility of
administrations.
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8. Types
• SOAP:-
• SOAP stands for Simple Object Access Protocol.
• It is a XML-based protocol for accessing web services.
• It also defines the way of building web services.
• SOAP is platform independent and language independent.
• By using SOAP, you will be able to interact with other
programming language applications.
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9. • REST:-
• REST stands for REpresentational State Transfer.
• The main goal of RESTful web services is to make web
services more effective.
• RESTful web services define services using the different
concepts that are already present in HTTP.
• REST is an architectural approach, not a protocol.
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10. Advantages
• Business Functions can be exposed over the Internet
• Interoperability
• Communication with Low Cost
• A Standard Protocol that Everyone Understands
• Reusability

11. Disadvantages
• No callback mechanism
• No transactions across the Web
• Availability - every user or client who uses web services knows
that it is not available hundred percent all the time.
• Security - web services are available to public through http-based
protocol. So every one can access web services and use it. This
flaw can be avoided using authentication mechanisms.