So I have currently been assigned to read about Web Services. I was going through the differences between REST, XML-RPC and SOAP and came across this particular link :
REST vs XML-RPC vs SOAP
It mentions this following, in terms of authentication and authorization
As for authentication and authorization, SOAP places the burden in the hands of the application developer. The REST methodology instead takes into account the fact that Web servers already have support for these tasks. Through the use of industry-standard certificates and a common identity management system, such as an LDAP server, developers can make the network layer do all the heavy lifting.
I was not able to understand this particular reference. Can some one explain how this happens in detail?
A web service is method or mechanism to communicate between different applications using open standard such as XML, WSDL, and SOAP. Using web service different device or program communicates over network
Type of WebService
SOAP Web Service
RESTFul Web Service
more information you can check :http://entityclass.in/rest/home.htm
Related
Right now I'm working in WebApi (trainee developer), and have good knowledge in webapi . But , I don't know anything about WebServices.
My Questions are :
1.What is WebServices?
2.What is the Use of WebServices?
3.Instead of WebServices why we are using WebApi.
4.Where we can use WebServices?
5.At a time We Can use both Webservices and WebApis?
Exposing the Existing Function on the network
A web service is a unit of managed code that can be remotely invoked using HTTP. That is, it can be activated using HTTP requests. Web services allow you to expose the functionality of your existing code over the network. Once it is exposed on the network, other applications can use the functionality of your program.
Interoperability
Web services allow various applications to talk to each other and share data and services among themselves. Other applications can also use the web services. For example, a VB or .NET application can talk to Java web services and vice versa. Web services are used to make the application platform and technology independent.
Standardized Protocol
Web services use standardized industry standard protocol for the communication. All the four layers (Service Transport, XML Messaging, Service Description, and Service Discovery layers) use well-defined protocols in the web services protocol stack. This standardization of protocol stack gives the business many advantages such as a wide range of choices, reduction in the cost due to competition, and increase in the quality.
Low Cost Communication
Web services use SOAP over HTTP protocol, so you can use your existing low-cost internet for implementing web services. This solution is much less costly compared to proprietary solutions like EDI/B2B. Besides SOAP over HTTP, web services can also be implemented on other reliable transport mechanisms like FTP
For Example in Asp.Net Core : https://dzone.com/articles/step-by-step-aspnet-core-restful-web-service-devel
can someone help me telling what is RESTful and difference with `web Service'?
i tried to search but i get confused between it and web service can anyone help ?
It's name clearly state its meaning that services provided on the web are called a web service
web service has two type REST API and SOAP API
RESTful Web Services are basically REST Architecture based Web Services. In REST Architecture everything is a resource. RESTful web services are light weight, highly scalable and maintainable and are very commonly used to create APIs for web-based applications.
SOAP (Simple Object Access Protocol) is a messaging protocol that allows programs that run on disparate operating systems (such as Windows and Linux) to communicate using Hypertext Transfer Protocol (HTTP) and its Extensible Markup Language (XML).
RESTful is one kind of web service. Another kind is SOAP. I think comment in this link will help you
https://stackoverflow.com/a/2285743/4874281
I am trying to learn rest web service and every where i found written that rest works on HTTP protocol. I just want to know what other protocol can be used for building rest service. Link for an example will be great help
REST is 'bound' to HTTP, since the use of the HTTP methods GET, POST, PUT, DELETE is quite central to REST.
First of all, REST is is a software architecture style for building scalable web services.
You are talking about REST when applied to webservices.
Web service APIs that adhere to the REST architectural constraints are
called RESTful APIs.
To answer your question
what other protocol can be used for building rest service
I first need to clarify some things:
You are asking about underlying web service protocols.
Now a web service is "a software system designed to support interoperable machine-to-machine interaction over a network". The network you are interested in is also the best know i.e TCP/IP aka the internet.
Now you are interested in particular about web services which adhere to the REST architectural constraints.
A REST-compliant Web service would be one who's primary purpose of the service is to manipulate representations of Web resources using a uniform set of stateless operations.
The protocol that is used for a RESTful web service
First you need to understand that you are addressing the application layer of the OSI model. HTTP is an application layer protocol of the OSI model.
Theoretically protocols from this list(application layer protocols) which :
can be used to build web services
conform to the REST architectural constraints (stateless,layered system)
could be used for a REST-ful service.
I am new to Web development. And hence, if the question is dumb, please be polite. For creating my application, I had to take a decision of whether writing a web service or a web application. After searching a few questions in stackoverflow, I came to know that, web service is something which doesn't involve human interaction. And web application is what human uses ( the UI/web page kind of stuffs ).
But lately, I saw gmail is a web service ( email service ). But I was confused from here on, because, gmail provides a UI, and human interactions do occur. And from there on, I got confused again.
So what I figured out from this is, gmail website is like a web application for users to use directly. The web application in turn uses the web service provided by Google for email. Is my understanding right? So can a web application be a client for web service?
If I am wrong somewhere, please do correct me. I hope to be clear after someone throws light on this with some good example. Thanks in advance.
You are quite right. Basically a Web Service has several endpoints over HTTP (normally) that provides data (generally in JSON or XML) and are meant to be consumed by Web Clients. Sometimes the are also called Web API's (Application Program Interface).
A Web Application is quite similar to a Web Service but it provides an interface where the user can interact with. Usually Web Applications are consumers of Web Services or Web APIs.
Following your example, Google email is could be considered as both, a Web Service and a Web Application. It is a Web Service because it provides a set of HTTP endpoints that works independently of its Web UI Application (GMail). In fact, you can find third party Web Apps that interact with the Google email Web API.
This concept is very important when designing Web Solutions. Ideally you want to design and implement a good Web API, usually a RESTful Service (in JSON/XML). Then you or others will be able to implement different types of applications (Web, Mobile, etc.) because of this API.
What does a Web service really mean ? I am not looking for a theoretical explanation, I am looking for something practical.
I was thinking that anything I can call from an external client is a Web service, so a basic PHP which returns JSON data could be a Web service.
But then I started reading about Web services in W3Schools.org and I got confused. If the PHP URL which returns JSON data is a web service, why would I need to do SOAP, WDSL etc ... to create a Web service. Isn't it extra work?
Also, if SOAP is the way data is sent back and forth, what about other transport types?
What differentiates a RESTful Web service from a SOAP based web service?
When you are talking about a webservice people generally misunderstand what it means, a webservice is simply a way to interact between a and b that abstracts the use of local technology standards. A WSDL defines the way in which the SOAP message is being sent over the channel. REST uses JSON over HTTP, WSDL uses SOAP over HTTP.
The advantage of a webservice is, say you develop one piece of code in .net and you wish to use JAVA to consume this code. You can interact directly with the abstracted layer and are unaware of what technology was used to develop the code.
SOA is a set of design paradigms and standards that tell you how to develop your services, in SOA each service is meant to comply with the principles listed below. WSDL is generally linked with but not essential for a SOA solution. If you wish to learn about SOA google "Thomas Erl SOA".
Priciples of SOA
Standardized service contract
Service loose coupling
Service abstraction
Service reusability
Service autonomy
Service statelessness
Service discoverability
Service composability
This Q&A Restful vs Other Web Services brings a lot of light to what is a webserver, and differences from SOAP and REST. Id recommend to read all the answers (many of them are very good).