Types of Webservices

Big Webservice
     Big web service uses SOAP standard to communicate between client and server. SOAP is a XML based protocol running on top of HTTP. SOAP(Simple Object Access Protocol) is a communication protocol allow us to bypass firewall, main advantage is a platform independent and language independent.

   SOAP Message is a XML document
Four Tags in SOAP are

• An Envelope (required) element that identifies the XML document as a SOAP message
• An optional Header element that contains header information
• A Body (required) element that contains call and response information
• An optional Fault element containing errors and status information

<?xml version="1.0"?>

<soap:Envelope xmlns:soap="http://www.w3.org/2001/12/soap-envelope"

soap:encodingStyle="http://www.w3.org/2001/12/soap-encoding">

<soap:Header>




</soap:Header>

<soap:Body>




  <soap:Fault>

 


  </soap:Fault>

</soap:Body>

</soap:Envelope>

WSDL (Web Services Description Language) is an XML-based language for locating and describing Web services.

     By using online tool http://sudzc.com/ we can convert our WSDL to ObjectiveC for iOS Project. This will automatically create and handle SOAP request , SOAP response respectively based on the WSDL.


RESTful Webservice
         REST stands for Representational State Transfer . RESTful web services are based on HTTP protocol and its methods are GET, POST,PUT and DELETE. REST is not a protocol and not a standard just a architecture style to communicate between client and server.