Web Services

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What Are Web Services?

A Web service is a service offered by an electronic digital device to another electronic device, connecting with each other by using the World Wide Web. In a Web service, Web technology such as the HTTP, initially designed for human to machine communication, is used for machine to machine communication, more particularly for transferring machine legible file formats these kinds of XML and JSON. In process, the Digital marketing Service in India generally provides an object oriented Web-based interface to a database server, used for example by another Web server, or by a mobile application, that provides a user interface to the end user. A different common application offered to the end user may be a mashup, where a Web server consumes several Web services at different machines, and compiles the content into one user software.

Microsoft Support for Web Services

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W3C

A software system designed to support inter-operable machine-to-machine interaction over a network. It has an interface described in a machine-processable format (specifically WSDL). Other systems interact with the Web service in a manner prescribed by its description using SOAP messages, typically conveyed using HTTP with an XML serialization in conjunction with other Web-related standards.

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OASIS

OASIS has produced key Web services security specifications, including WS-Security and SAML. The OASIS Web Services Component Model (WSCM) Technical Committee will look to establish XML vocabularies and interfaces that allow Web services to be displayed agnostic of the formats or devices involved in its transmission

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WS-I

In particular, WS-I is formed by a community of Technology Leaders, that focus on Web Services to respond to customer needs by providing guidance and recommended practices for developing and deploying Inter-operable Web Services solutions. It has also released a variety of tools for conformance testing.

Web Services Enhancements

Web services are open standard XML, SOAP, HTTP based Web Applications that interact with other web applications for the purpose of interchanging data. Web Services can convert your current applications into Web applications.

Web service is a technology to communicate one coding language with another. For example, java programming language can communicate with PHP and .Net by using web services. In other words, web service delivers a way to achieve interoperability. Digital Marketing services is one of the professional web designing company in India providing services all over the world.

Consider a bus booking site. When user selects a bus and input all the information, he has to make the payment and for that the site requires user to select a mode of payment . If user selects CREDIT card as the mode of payment then user has to input all the credit card details. Now these details cannot be authenticated by the bus booking site , it has to request the bank to authenticate the details provided by the user. But how will it interact with the bank because the bank application can be developed in any technology . The bus booking site has no control over which technology the bank application has been developed.

Thats where webservices comes into picture.

It makes the interaction between two applications possible . It accomplishes by serving the data in the standard format such as XML or JSON.

 

In our example the bus booking site will send all the CREDIT card related information. The bank application will then authenticate the credentials and then return appropriate response to the bus booking site.

Now the question that would arise in your mind, How would web service interact?

Web services can use many different protocols, but the most common these days is the REST style via HTTP. Using this style, web services can post, retrieve, and delete data by specifying an HTTP method (POST, GET, DELETE, etc), a URL (like example.com/api/users/photos) and optional JSON data in the body.

 

Another increasingly common method is WebSockets. This protocol is initiated via HTTP, but then uses just a TCP connection for sending/receiving the data. This is better for applications that have a more constant flow of data, like chat apps or games.

Why do we use Web Service?

The name itself describes a lot, ‘Web + Service’, which means the service which are available on the web. To go back a little into the past, there was a time the IT industry was finding a standard way to communicate with each other, when the leaders in the IT industry such as IBM, Sun, Microsoft and several others came up with the Web Services concept that made things feasible in exchanging services, information and products.

 

In simple words, a Web Service is a piece of software available on the web that uses HTTP and XML messaging system. This clearly implies that it is not bound to any specific operating system or programming language. Hence, Web Services provide a standard means of inter-operation between software applications, irrespective of its running on different platforms and frameworks.