http://www.ics.uci.edu/~fielding/pubs/dissertation/rest_arch_style.htm
Rest(Representational State Transfer )
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Soap(Simple Object Access Protocol)
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REST describes a set of architectural principles by which data
can be transmitted over a standardized interface (such as HTTP)
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SOAP defines a standard communication protocol.
The Web Services Description Language (WSDL) contains and describes
the common set of rules to define the messages, bindings, operations and
location of the Web service. WSDL is a sort of formal contract to define the
interface that the Web service offers.
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The W3C Technical Architecture Group (TAG) developed the REST
architectural style in parallel with HTTP 1.1 of 1996-1999.
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Microsoft introduced it.
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REST is focused on accessing named resources through a single
consistent interface
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SOAP brings its own protocol and focuses on exposing pieces of
application logic (not data) as services
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Different data format XML/Json/CSV are supported.
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SOAP supports XML
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Rest reads can be cached
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SOAP read cannot be cached.
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While REST supports transactions, it isn’t as comprehensive and isn’t
ACID compliant
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WS-Security which adds some enterprise security features
Need ACID Transactions over a service, you’re going to need SOAP
SOAP has successful/retry logic built in and provides end-to-end
reliability
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Implementation is simpler. Beneficial for public apis. Easier to
document and easier for end user/browser as well.
You can simply use browser for make a GET request. For other HTTP VERBS
such as POST/PUT you can use various browser plugin and fiddler.
Advanced rest client chrome extension is my favorite.
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SOAP is not as easier to code as compare to REST. Every time I ask my
colleague that we need to implement a 3rd party API which is in
SOAP he gives me weird look.
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The RESTful Web services are completely stateless.
Session state is therefore kept entirely on the client. This
constraint induces the properties of visibility, reliability, and
scalability.
Visibility is improved because a monitoring system does not have to
look beyond a single request datum in order to determine the full nature of
the request.
Reliability is improved because it eases the task of recovering from
partial failures.
Scalability is improved because not having to store state between
requests allows the server component to quickly free resources, and further
simplifies implementation because the server doesn’t have to manage resource
usage across requests. Like most architectural choices, the stateless
constraint reflects a design trade-off. The disadvantage is that it may
decrease network performance by increasing the repetitive data
(per-interaction overhead) sent in a series of requests, since that data
cannot be left on the server in a shared context. In addition, placing the
application state on the client-side reduces the server’s control over
consistent application behavior, since the application becomes dependent on
the correct implementation of semantics across multiple client versions
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SOAP are stateful.
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If a user attempts to upload something to a mobile app (say, an image
to Instagram) and loses reception, REST allows the process to be retried
without major interruption, once the user regains cell service.
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If the SOAP service is interrupted it would require more
initialization and state code.
The client context is stored on the server between requests which
make initialization time consuming.
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