Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Save more on your purchases now! discount-offer-chevron-icon
Savings automatically calculated. No voucher code required.
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Building RESTful Web Services with .NET Core
Building RESTful Web Services with .NET Core

Building RESTful Web Services with .NET Core: Developing Distributed Web Services to improve scalability with .NET Core 2.0 and ASP.NET Core 2.0

Arrow left icon
Profile Icon Bhattacharya Profile Icon Gaurav Aroraa Profile Icon Tadit Dash
Arrow right icon
€32.99
Paperback May 2018 334 pages 1st Edition
eBook
€17.99 €26.99
Paperback
€32.99
Subscription
Free Trial
Renews at €18.99p/m
Arrow left icon
Profile Icon Bhattacharya Profile Icon Gaurav Aroraa Profile Icon Tadit Dash
Arrow right icon
€32.99
Paperback May 2018 334 pages 1st Edition
eBook
€17.99 €26.99
Paperback
€32.99
Subscription
Free Trial
Renews at €18.99p/m
eBook
€17.99 €26.99
Paperback
€32.99
Subscription
Free Trial
Renews at €18.99p/m

What do you get with Print?

Product feature icon Instant access to your digital eBook copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
Table of content icon View table of contents Preview book icon Preview Book

Building RESTful Web Services with .NET Core

Building the Initial Framework – Laying the Foundation of the Application

In the last chapter, we talked about REST, its characteristics, and how it is implemented in ASP.NET Core. We will go ahead with that knowledge and set up the environment to develop an application in this chapter.

We will start building the basic framework of the app. We will understand each and every HTTP verb, how they work, and their implementation paradigms in ASP.NET Core Web API. Before all that, we will have a quick look at SOAP and how it is different from REST.

While we walk though the verbs, we will explore a very easy-to-use tool to analyze the HTTP requests and responses.

We will cover the following topics:

  • All about web services (REST and SOAP)
  • Running the development server
  • REST verbs and status codes
  • Implementation of verbs in ASP.NET Core Web API
  • Examples using Postman
  • SOAP versus...

SOAP

Simple Object Access Protocol (SOAP) is an XML-based messaging protocol for exchanging information among computers. SOAP relies on application layer protocols, most often Hypertext Transfer Protocol (HTTP) or Simple Mail Transfer Protocol (SMTP), for message negotiation and transmission. As we are talking about HTTP, which is installed and runs on every operating system, web services implementing SOAP can be called from any platform using any language.

SOAP structure

We already know that a SOAP message is an XML document, but let's have a better look by way of a diagram:

The following is a description of the components from the preceding diagram:

  • Envelope: Mandatory element of SOAP message structure. Defines the...

REST

REST is an architectural style for providing standards between computer systems on the web, so that systems can communicate with each other easily. Services compliant to the REST style are often called RESTful services.

Let's talk about a few important constraints of a web service when it is tagged as RESTful.

Server and client are independent

With REST, there is no restriction or dependency between server and client. Both can be independent of each other. It's just the URL by which the client understands the service. The code for a web service on a server can be modified without caring about the clients that are associated with it and vice versa.

This kind of separation helps the client/server architecture...

Setting up the environment

Before we explore the communication mechanism, let's first set up the development environment. We will use Visual Studio 2017 for our examples.

Open Visual Studio and undertake our favorite step, File | New | Project, which opens up a dialog window with available templates, as shown in the following screenshot:

Select ASP.NET Core Web Application as shown in the preceding screenshot. Don't forget to select .NET Core in the left-hand side panel. Everything looks cool now.

Let's click OK and then we will land on another dialog where we can select more templates related to our web app. Obviously, we will click on Web API and then click OK.

The project is created. Beautifully, it has crafted all the necessary components and created an example controller for us named ValuesController as shown in the following screenshot:

Now, here is one...

SOAP versus REST

Following are some key differences between SOAP and REST:

SOAP
REST
It is an XML-based message protocol. It is an architectural style.
WSDL is used for communication between client and server. XML or JSON is used to send and receive data between client and server.
Services are invoked by calling the RPC method. Services expose endpoints via URLs.
Response is easily readable by a human. Response is readable in the form of plain XML or JSON.
Data transfer occurs over HTTP. It leverages protocols such as SMTP, FTP, and so on. REST data transfer occurs over HTTP only.
It is difficult to call a SOAP service from JavaScript. It is very easy to call a REST service from JavaScript.

Single-page application model

Traditionally, in a web application, the client requests the server for a web page. Then, the server responds to the client with the requested HTML page after validating and authenticating the request, if necessary. The next request to the server might occur when a user hits some link on the page, submits a form, and so on. The server again processes the request and sends back the response with another HTML page.

Don't you think instead of getting the whole HTML page (which would be mostly the same look and feel as the last loaded page), we should just get the data we need and update the currently loaded page itself without posting back to the server? Yes, modern web development works in that regard. Today, we just need data from the server on demand using Ajax. After receiving the data, we will just update the UI with JavaScript or a client...

Service-oriented architecture

Like SPA, Web API plays an important role in service-oriented architecture (SOA). As the name suggests, it is an architecture methodology that deals with separation of responsibility from a business-oriented point of view into independent services. Often, these independent services or components can be designed using RESTful Web APIs.

Consider an e-commerce application that would have different components such as ordering, billing, payment processing, customer profile management, and so on. Each of these components has its own business logic and can be implemented independently.

The following diagram represents a pictorial view of such an application having independent components:

To make them independent, RESTful APIs can be exposed for these components, which can be easily consumed by any client/application including other components as well, as...

Summary

We started with some basic knowledge of SOAP and then we moved towards REST gradually.

This chapter shed some light on the fundamental REST building blocks and how they actually work. We explored the different status codes returned by widely used HTTP verbs.

To explore the request and response cycles of Web API, you can use Postman, where you not only have control over what is being sent and received, but also the ability to get code for different languages in order to consume the API.

ASP.NET Core attributes can be tied to controller action methods to make them more expressive and manageable in terms of routing and arguments.

Single-page applications can be easily designed using client-side technologies and consuming ASP.NET Core Web APIs so that pages can be updated as soon as responses are received to have a smooth user experience.

Web APIs can be plugged into the...

Left arrow icon Right arrow icon
Download code icon Download Code

Key benefits

  • Follow best practices and explore techniques such as clustering and caching to achieve a reactive, scalable web service
  • Leverage the .NET Framework to quickly implement RESTful endpoints.
  • Learn to implement a client library for a RESTful web service using ASP.NET Core.

Description

REST is an architectural style that tackles the challenges of building scalable web services. In today's connected world, APIs have taken a central role on the web. APIs provide the fabric through which systems interact, and REST has become synonymous with APIs. The depth, breadth, and ease of use of ASP.NET Core makes it a breeze for developers to work with for building robust web APIs. This book takes you through the design of RESTful web services and leverages the ASP.NET Core framework to implement these services. This book begins by introducing you to the basics of the philosophy behind REST. You'll go through the steps of designing and implementing an enterprise-grade RESTful web service. This book takes a practical approach, that you can apply to your own circumstances. This book brings forth the power of the latest .NET Core release, working with MVC. Later, you will learn about the use of the framework to explore approaches to tackle resilience, security, and scalability concerns. You will explore the steps to improve the performance of your applications. You'll also learn techniques to deal with security in web APIs and discover how to implement unit and integration test strategies. By the end of the book, you will have a complete understanding of Building a client for RESTful web services, along with some scaling techniques.

Who is this book for?

This book is intended for those who want to learn to build RESTful web services with the latest .NET Core Framework. To make best use of the code samples included in the book, you should have a basic knowledge of C# and .NET Core.

What you will learn

  • • Add basic authentication to your RESTful API
  • • Create a Carts Controller and Orders Controller to manage and process Orders
  • • Intercept HTTP requests and responses by building your own middleware
  • • Test service calls using Postman and Advanced REST Client
  • • Secure your data/application using annotations
Estimated delivery fee Deliver to Luxembourg

Premium delivery 7 - 10 business days

€17.95
(Includes tracking information)

Product Details

Country selected
Publication date, Length, Edition, Language, ISBN-13
Publication date : May 31, 2018
Length: 334 pages
Edition : 1st
Language : English
ISBN-13 : 9781788291576
Vendor :
Microsoft
Languages :
Concepts :
Tools :

What do you get with Print?

Product feature icon Instant access to your digital eBook copy whilst your Print order is Shipped
Product feature icon Paperback book shipped to your preferred address
Product feature icon Download this book in EPUB and PDF formats
Product feature icon Access this title in our online reader with advanced features
Product feature icon DRM FREE - Read whenever, wherever and however you want
Estimated delivery fee Deliver to Luxembourg

Premium delivery 7 - 10 business days

€17.95
(Includes tracking information)

Product Details

Publication date : May 31, 2018
Length: 334 pages
Edition : 1st
Language : English
ISBN-13 : 9781788291576
Vendor :
Microsoft
Languages :
Concepts :
Tools :

Packt Subscriptions

See our plans and pricing
Modal Close icon
€18.99 billed monthly
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Simple pricing, no contract
€189.99 billed annually
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts
€264.99 billed in 18 months
Feature tick icon Unlimited access to Packt's library of 7,000+ practical books and videos
Feature tick icon Constantly refreshed with 50+ new titles a month
Feature tick icon Exclusive Early access to books as they're written
Feature tick icon Solve problems while you work with advanced search and reference features
Feature tick icon Offline reading on the mobile app
Feature tick icon Choose a DRM-free eBook or Video every month to keep
Feature tick icon PLUS own as many other DRM-free eBooks or Videos as you like for just €5 each
Feature tick icon Exclusive print discounts

Frequently bought together


Stars icon
Total 102.97
Building RESTful Web Services with .NET Core
€32.99
C# and .NET Core Test-Driven Development
€32.99
C# 7 and .NET Core 2.0 High Performance
€36.99
Total 102.97 Stars icon

Table of Contents

12 Chapters
Getting Started Chevron down icon Chevron up icon
Building the Initial Framework – Laying the Foundation of the Application Chevron down icon Chevron up icon
User Registration and Administration Chevron down icon Chevron up icon
Item Catalogue, Cart, and Checkout Chevron down icon Chevron up icon
Integrating External Components and Handling Chevron down icon Chevron up icon
Testing RESTful Web Services Chevron down icon Chevron up icon
Continuous Integration and Continuous Deployment Chevron down icon Chevron up icon
Securing RESTful Web Services Chevron down icon Chevron up icon
Scaling RESTful Services (Performance of Web Services) Chevron down icon Chevron up icon
Building a Web Client (Consuming Web Services) Chevron down icon Chevron up icon
Introduction to Microservices Chevron down icon Chevron up icon
Other Books You May Enjoy Chevron down icon Chevron up icon
Get free access to Packt library with over 7500+ books and video courses for 7 days!
Start Free Trial

FAQs

What is the delivery time and cost of print book? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela
What is custom duty/charge? Chevron down icon Chevron up icon

Customs duty are charges levied on goods when they cross international borders. It is a tax that is imposed on imported goods. These duties are charged by special authorities and bodies created by local governments and are meant to protect local industries, economies, and businesses.

Do I have to pay customs charges for the print book order? Chevron down icon Chevron up icon

The orders shipped to the countries that are listed under EU27 will not bear custom charges. They are paid by Packt as part of the order.

List of EU27 countries: www.gov.uk/eu-eea:

A custom duty or localized taxes may be applicable on the shipment and would be charged by the recipient country outside of the EU27 which should be paid by the customer and these duties are not included in the shipping charges been charged on the order.

How do I know my custom duty charges? Chevron down icon Chevron up icon

The amount of duty payable varies greatly depending on the imported goods, the country of origin and several other factors like the total invoice amount or dimensions like weight, and other such criteria applicable in your country.

For example:

  • If you live in Mexico, and the declared value of your ordered items is over $ 50, for you to receive a package, you will have to pay additional import tax of 19% which will be $ 9.50 to the courier service.
  • Whereas if you live in Turkey, and the declared value of your ordered items is over € 22, for you to receive a package, you will have to pay additional import tax of 18% which will be € 3.96 to the courier service.
How can I cancel my order? Chevron down icon Chevron up icon

Cancellation Policy for Published Printed Books:

You can cancel any order within 1 hour of placing the order. Simply contact customercare@packt.com with your order details or payment transaction id. If your order has already started the shipment process, we will do our best to stop it. However, if it is already on the way to you then when you receive it, you can contact us at customercare@packt.com using the returns and refund process.

Please understand that Packt Publishing cannot provide refunds or cancel any order except for the cases described in our Return Policy (i.e. Packt Publishing agrees to replace your printed book because it arrives damaged or material defect in book), Packt Publishing will not accept returns.

What is your returns and refunds policy? Chevron down icon Chevron up icon

Return Policy:

We want you to be happy with your purchase from Packtpub.com. We will not hassle you with returning print books to us. If the print book you receive from us is incorrect, damaged, doesn't work or is unacceptably late, please contact Customer Relations Team on customercare@packt.com with the order number and issue details as explained below:

  1. If you ordered (eBook, Video or Print Book) incorrectly or accidentally, please contact Customer Relations Team on customercare@packt.com within one hour of placing the order and we will replace/refund you the item cost.
  2. Sadly, if your eBook or Video file is faulty or a fault occurs during the eBook or Video being made available to you, i.e. during download then you should contact Customer Relations Team within 14 days of purchase on customercare@packt.com who will be able to resolve this issue for you.
  3. You will have a choice of replacement or refund of the problem items.(damaged, defective or incorrect)
  4. Once Customer Care Team confirms that you will be refunded, you should receive the refund within 10 to 12 working days.
  5. If you are only requesting a refund of one book from a multiple order, then we will refund you the appropriate single item.
  6. Where the items were shipped under a free shipping offer, there will be no shipping costs to refund.

On the off chance your printed book arrives damaged, with book material defect, contact our Customer Relation Team on customercare@packt.com within 14 days of receipt of the book with appropriate evidence of damage and we will work with you to secure a replacement copy, if necessary. Please note that each printed book you order from us is individually made by Packt's professional book-printing partner which is on a print-on-demand basis.

What tax is charged? Chevron down icon Chevron up icon

Currently, no tax is charged on the purchase of any print book (subject to change based on the laws and regulations). A localized VAT fee is charged only to our European and UK customers on eBooks, Video and subscriptions that they buy. GST is charged to Indian customers for eBooks and video purchases.

What payment methods can I use? Chevron down icon Chevron up icon

You can pay with the following card types:

  1. Visa Debit
  2. Visa Credit
  3. MasterCard
  4. PayPal
What is the delivery time and cost of print books? Chevron down icon Chevron up icon

Shipping Details

USA:

'

Economy: Delivery to most addresses in the US within 10-15 business days

Premium: Trackable Delivery to most addresses in the US within 3-8 business days

UK:

Economy: Delivery to most addresses in the U.K. within 7-9 business days.
Shipments are not trackable

Premium: Trackable delivery to most addresses in the U.K. within 3-4 business days!
Add one extra business day for deliveries to Northern Ireland and Scottish Highlands and islands

EU:

Premium: Trackable delivery to most EU destinations within 4-9 business days.

Australia:

Economy: Can deliver to P. O. Boxes and private residences.
Trackable service with delivery to addresses in Australia only.
Delivery time ranges from 7-9 business days for VIC and 8-10 business days for Interstate metro
Delivery time is up to 15 business days for remote areas of WA, NT & QLD.

Premium: Delivery to addresses in Australia only
Trackable delivery to most P. O. Boxes and private residences in Australia within 4-5 days based on the distance to a destination following dispatch.

India:

Premium: Delivery to most Indian addresses within 5-6 business days

Rest of the World:

Premium: Countries in the American continent: Trackable delivery to most countries within 4-7 business days

Asia:

Premium: Delivery to most Asian addresses within 5-9 business days

Disclaimer:
All orders received before 5 PM U.K time would start printing from the next business day. So the estimated delivery times start from the next day as well. Orders received after 5 PM U.K time (in our internal systems) on a business day or anytime on the weekend will begin printing the second to next business day. For example, an order placed at 11 AM today will begin printing tomorrow, whereas an order placed at 9 PM tonight will begin printing the day after tomorrow.


Unfortunately, due to several restrictions, we are unable to ship to the following countries:

  1. Afghanistan
  2. American Samoa
  3. Belarus
  4. Brunei Darussalam
  5. Central African Republic
  6. The Democratic Republic of Congo
  7. Eritrea
  8. Guinea-bissau
  9. Iran
  10. Lebanon
  11. Libiya Arab Jamahriya
  12. Somalia
  13. Sudan
  14. Russian Federation
  15. Syrian Arab Republic
  16. Ukraine
  17. Venezuela