In this part of article
we will learn about asp.net web API and why we need asp.net web API.Most of
developers are think about use to web API but they are not aware about that
,that's why i have decided to write complete topic for asp.net web API.If you want
to learn all about REST web API you should visit my all part of article.I am
also going to explain about basic definition of web service ,WCF,and difference
between them because of most of developers are confused why i am using if we
have already WCF and web service is available in market.
Agenda:
- What is web service ?
- What is WCF ?
- What is REST ?
- What difference between SOAP and REST based services ?
- What is difference between web service,WCF and Web API
?
- Introduction of web API and why web API become popular
?
What is web
services(.asmx) ?
Before web services
remoting is used but there are many cons that's why web services replace
remoting. "Web
service is like a web based application which is normally a class containing
methods that could be used by other web based or window based
applications. It also follows a code-behind layer such as the web
pages, although its not containing a user interface."
Web services is
way to communicate between two different or same web based application using
"webmethod".web services can be accessible from web based or window
based applications.Web services is soap based and transforming data via xml.
For more details
about web services you can go through best article which is written by Vithal Wadje .
Drawback of web
services,SOAP in Asp.net:
- Hosting dependency
- Protocol dependency
- Serialisation dependency
- Data transformation
And also there are more
drawback which will resolved by WCF and Web API,for more details you can go on
given link.
What is WCF(.svc) and
why replace web services with WCF ?:
Preceding WCF, a .NET
2.0 web reference was made in the clients that went about as an intermediary
that encouraged the correspondence with a Web Service. .NET3.5 acquainted
another instrument with make these intermediaries that are likewise perfect
with WCF server-side technologies.
"Windows
Communication Foundation (Code named Indigo) is a programming stage and runtime
framework for building, arranging and conveying system appropriated
administrations. It is the most recent administration arranged innovation;
Interoperability is the major qualities of WCF. It is bound together
programming model gave in .Net Framework 3.0. WCF is a joined element of Web
Service, Remoting, MSMQ and COM+. WCF gives a typical stage to all .NET
correspondence. you
can transfer information as asynchronous messages from one endpoint to another
endpoint."
For more details all
about WCf go through on given link. http://wcftutorial.net/
What REST ?
REST is stand
for Representational State Transfer. (Sometime we can say "ReST".)
Its a stateless, client-server, cacheable based protocol to communicate -- and
in virtually all points, the HTTP protocol is using.REST is an architecture style
for designing networked applications.
Actually By REST
we can create web api using multiple verbes e.g GET,POST,PUT,DELETE and
endpoint will looks like this.
GET /GetData?id=2
POST /SaveData?id=2
PUT
/UpdateData?id=1052&review_id=2
DELETE
/DeleteDataByID?id=2
For more details about
REST go through given link.
What difference between
SOAP and REST based services ?:
1.
REST supports multiples
verbes over http's (GET,POST,PUT,DELETE)
2.
Soap is xml based
protocal whereas REST is architectural based.
3.
WDSL use to communicate
between client and server. where as REST use XML or JSON.
4.
Service is calling
by RPC method whereas REST called by direct URL.
5.
Web services is not
return human readable data whereas REST returns JSON data.
6.
REST is easy to consume
whereas soap is some complicated.
7.
REST is 5 times faster
than soap.
8.
REST transfering data
via HTTP.
9.
REST is stateless and
allow to cache.
What is difference between web service,WCF and
Web API ?
Now i am going to
explain differences between web services ,wcf and Web api. actually i am trying
to explain about scope of latest technologies.
- Web services is soap based and return xml data whereas
wcf is also same as but web api can be return json data.
- Web services is support only HTTP protocal whereas WCF
support multiple (TCP,named pipe,p2p,etc..) and Web api can be use from
any where.
- Web Api can be consumed from any where or any plateform
but web services can not.
- Web services can be hosted on IIS but wcf and can be
anywhere,Web Api can be on IIS and self.
- We can use self hosting in wcf and WebApi but not allow
in web services.
For more details you can
go through given links.
Introduction of web API
and why web API become popular ?
Web Api
stands for "Application programming interface" its a
open source and rich framework of ASP.NET. Asp.net WebApi is following MVC
pattern architecture like controller,routing,action,filter,model
binder,etc...Web API area is so broad because it can be consumed from anywhere
any plateform any browser.Its totally independent like can be accessible from
Mobile,tablet,android,window.etc..
According this image we
can easily understand Web API can be consumed from anywhere.
1.It supports CRUD
based action with HTTP verbs GET,POST,PUT and DELETE.
2.Response with status
code.
3.Webapi support
MediaTypeFormatter like multipart/formdata.
4.Easy to create and
consume.
I hope you all learn lot
of thinks why we are using web API and some drawback of web services and wcf
,So actually i have decided to write all about web API from a-z step by step in different different part.
In this article i have
written only introduction part of Web api ,To more about web api wait.. for
part 2 with example.
Bikesh Srivastava
WEB API
