Web Services

Agenda: Ø  What is a Web Service Ø  Uses of Web Services Ø  Types of Web Services Ø  Web Service protocols Ø  Web Services Description Language (WSDL) Ø  What is SOAP

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What is a Web Service

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CLIENT SERVER

Exchange data

JAVA

It is a service to exchange data from different unknown systems.

C#

Uses of Web Services

� Reuse of existing applications � Communicate or Exchange with different

platforms.

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Types of Web Services

�  Simple Web services � Complex Web services

Simple Web services have only simple data types like integer, string and other types are sent and receive Complex Web Services are need to configure the ability to send and receive more than the simple data types.

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Web Service protocols

�  SOAP � REST � BEEP �  JSON-RPC � XMLL-RPC

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Web Services Description Language (WSDL) �  WSDL is an XML document, used to describe Web services �  It describes major 4 elements �  <types> �  <message> �  <port Type>

�  <binding>

We can generate WSDL through IDE or can written manually. First create WSDL and then developing implementation classes depends on WSDL called Top-down approach. Depends on implementation classes creating WSDL is Bottom-up approach.

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�  It is a simple XML-base protocol to access web services or to exchange information over HTTP.

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What is SOAP

CLIENT SERVER

SOAP Protocol

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