In modern Internet applications, different software platforms are used to build web applications. Applications can be developed in Java, others in .Net, Angular JS, Node.js. From there, the question may arise of what are web services . Essentially, the work environment is not visible to regular users.
Often times, these unique applications require some kind of
communication between them. Since they are built using different development
languages, it is really difficult to ensure accurate communication between
applications.
Importance of technological advances
When considering what web services are, it is worth
determining the relevance of this development and whether it has analogues. The
technology presented synthesizes services and applications, in addition to
allowing them to communicate with each other.
Web services provide a common platform that allows multiple applications built in different programming languages to communicate with each other.
Definition of web services
To answer this question, we can say that it is a
standardized environment for distributing communication between client and
server applications on the World Wide Web . It can be edited and has
enhancement packages.
Apart from this, a web service can be defined as a software
module designed to perform a specific set of tasks. The pillars of the
applications can be found on the web and can also be named accordingly. When
called, the web service will be able to provide functionality to the client
requesting this portal. All this happens in a couple of seconds.
Operating principles of web services
When talking about what web services are, it is necessary to
bear in mind their operating conditions . What will allow to understand the
operation of the system.
• The
client will make a series of calls to a web service by making requests to the
server that will host the actual web service.
• These
requests are executed through remote procedure calls. These remote procedure
calls (RPC) are those that are made in the corresponding request.
An example of a web service would be Amazon. The
organization has a network of online stores and delivery systems. Provides a
web service that requests prices for products sold online through amazon.com.
The front-end or presentation layer can be in .Net or Java, but any programming
language interacts with the web service in its own way. It takes place on a
common platform.
Constituent elements of web services
The main component of web services on the Internet is the
data that is transferred between the client and the server, and that is XML
(Extensible Markup Language). It is analogous to HTML and is easily
understandable as it is an intermediate language that many programming
languages understand. So when applications communicate with each other, they
actually do so in XML. This provides a common platform for applications
developed in different programming languages to communicate with each other.
The portals use what is called SOAP (Simple Object Access
Protocol) to send XML data between applications. The data is sent over simple
HTTP. The information that is sent from a web service to an application is
called SOAP messages.
The SOAP messages are nothing more than an XML document.
Because the document is written in XML, the client application that calls the
web service can be written in any programming language.
Types of web services applications
There are basically two types of web services:
• SOAP
• RESTful
For a developed environment to be fully functional, certain
components must be present. These components must be present regardless of the
development language used to schedule a particular request. You can create a
web service yourself. To do this, you have to create a portal to host it and
install a working programming environment.