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Difference between restful and soap web services

The difference between SOAP vs. REST API. Perhaps you’re already well familiar with SOAP and REST, looking to expand your knowledge or get a new perspective. Or maybe you heard about them and are trying to get a better understanding. After all, SOAP and REST are well established with definitions and specifications going back decades.

Please allow me to describe the SOAP and REST difference, compare, and otherwise shed light on these two significant approaches to web service and web API design. I’ll also highlight some of the testing challenges associated with these approaches and how to solve them. First, let’s define what these are and how they relate to the World Wide Web.
As we know that each machine understand and deals in its different language or input so web-services are something which are required for inter communication between machines and to exchange data between them. In order to implement some set of restrictions over their communication some set of rules and regulations are defined which are known as web-services which basically defines the format and type of data that need to be exchanged and specifically a contract which both machines should be aware of before taking part in communication.

This communication system can be categorized into two types, namely Simple Object Access Protocol or SOAP, and Representational State Transfer or REST.

Following are the important differences between REST API and SOAP API.

1ImplementationRest API is implemented as it has no official standard at all because it is an architectural style.On other hand SOAP API has an official standard because it is a protocol.
2Internal communicationREST APIs uses multiple standards like HTTP, JSON, URL, and XML for data communication and transfer.SOAP APIs is largely based and uses only HTTP and XML.
3Resource requirementAs REST API deploys and uses multiple standards as stated above, so it takes fewer resources and bandwidth as compared to SOAP API.On other hand Soap API requires more resource and bandwidth as it needs to convert the data in XML which increases its payload and results in the large sized file.
4DescriptionREST API uses Web Application Description Language for describing the functionalities being offered by web services.On other hand SOAP API used Web Services Description language for the same.
5SecurityREST has SSL and HTTPS for security.On other hand SOAP has SSL( Secure Socket Layer) and WS-security due to which in the cases like Bank Account Password, Card Number, etc. SOAP is preferred over REST.
6AbbreviationREST stands for Representational State Transfer.On other hand SOAP stands for Simple Object Access Protocol
7InterchangeREST can make use of SOAP as the underlying protocol for web services, because in the end it is just an architectural pattern.On other hand SOAP cannot make use of REST since SOAP is a protocol and REST is an architectural pattern.

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