Application Programming Interface (APIs) provides you with a communication channel that the client and server use to talk. APIs have several types, and one of them is Web Services. Let’s take a look at it.
It is a medium, a piece of software that allows communication between client and server on the World Wide Web. It uses XML for the messaging system that encodes all communications to web service.
Because web services use XML for communication, they have overcome the language barrier and can communicate with any application despite what programming language it is written in. A client requests a web service by sending a request via XML, and the web service sends a response back in XML.
There are different types of web services. Let’s take a look at them:
Let’s take a look at some of the characteristics of web services.
As mentioned above, web services use XML for data representation at the data transportation layer.
The web service is independent of the client, and they are not bound with each other. They are loosely coupled, which means if a web service changes over time, the client will still use the same method to call the web service.
There are various ways to utilize different web services. You can call them synchronously, where the completion of one request acts as an input for the second request. Web services are used asynchronously where multiple operations are working in parallel.
Web services can be used to invoke third-party functions, procedures, and methods of remote objects using XML-based protocol.
Since web services rely on XML for data exchange, they can send data and complex documents.