What you would learn in Minimal WebApi with ASP.NET Core (Visual Studio 2022) course?
This is a quick course that covers the basic web APIs for ASP.NET Core. Its explanations are in easy language. Downloads are included for nearly every chapter. Tutorials have been made short. The audio is crystal clear.
Beginning with API Web API
This tutorial begins by providing a basic introduction to the concept of web API. Then we design an initial structure for an application that can assist us in learning about different kinds of web API, which will be covered in a series in the coming tutorials.
The GET is a Minimal WebApi no parameters
In this tutorial , we will create a web api that allows us to access all records in tables. Be aware that this kind of query is not ever implemented in a real-world project. it is always qualified by certain parameters which return a smaller quantity of entries.
Minimum GET WebApi that has an element of the Numeric Type
In the previous tutorial , we learned how to create a web API that doesn't require parameters. It was executed to retrieve all rows of the table. In this tutorial, we will create a new web API that accepts a parameter and then returns the information based on the parameter.
A Minimal WebApi finds a record by id
In this tutorial , we will implement a web api of the GET type that accepts an ID as an input parameter and returns the record for that parameter.
Utilizing Postman to run WebApi
Postman is a tool that allows you to run easily and run web API. It can be downloaded as a desktop program. It has a wide range of features, however we will only use only a tiny portion of it specific to our web API needs.
Api that is Minimal in POST to assist in creating an entirely new record
A web api that is of the type POST can be utilized to create a new record. For example, if you need to create a brand new record for an a physician, then we will need to utilize a POST api to transmit the required fields needed to create records.
A WebApi Minimal to the process of updating a Record
A Http PUT request can be used to change the existing records. In order to do this, the client needs to provide the unique ID of the record, along with the complete updated record. Partially updated records cannot be done by using a PUT kind of Api. Api. Partially updated updates are, instead they are supported via using an HTTP PATCH command. However, that's not the subject of this article. This tutorial will concentrate specifically on the Http Put form that is available on Web Api.
Minimum DELETE WebApi for deleting the Record
The HTTP DELETE Request is utilized to delete records. The server sends a 200 OK response after successful deletion and also the deleted item. It can also send 204 No Content in the event that the deleted item is or is not included within the reply. Let's look at the way to implement it in this article!
Over-Posting with WebApi and a solution using an Object for Data Transfer
We've been working on an object class that has three properties, namely id Name, ID, and Fees. Each of the three properties has been involved and are visible in JSON communication via every Web Api that we've been discussing and wrote about in the previous tutorials in this chapter. This is referred to as over-posting. What if there was some property, like an email address you didn't want to expose? This tutorial offers an answer through the concept of Data Transfer Obj.
Ensuring that there is no over-posting of a Collection within the WebApi WebApi
If an API must return records, and we don't need to transmit all objects the API can utilize Data Transfer Object to return only a subset of the properties, just the required subset. To learn more about over-posting, check out the tutorial previously posted "Over-Posting using WebApi as well as a solution Using the Data Transfer Object ".
DTO object as argument and return in a WebApi
This guide explains how you can modify the POST type of WebApi to ensure it does not over-post data. POST-WebApi POST WebApi accepts an object of data as a parameter. It after that, it adds the data to databases and then it returns an HTTP 201 created response as well as the json of the newly created object. We've covered it in our earlier tutorials. If you want to get more information on how to over-post you can refer to a earlier video tutorial "Over-Posting using WebApi and a Solution using the Data Transfer Object ".
A GET WebApi is called from a CWinRT app written in C++
This tutorial will explain how the GET web API is called by the C++ WinRT application. I've selected the WinRT type as it comes with several pre-written functions that make it easier to use access to the internet and parse JSON. I'm not in a position to describe the specifics of an WinRT configuration and have therefore developed a WinRT console app that communicates with our API and retrieves an unspecified string from the application which is then processed by parsing the json in the string. The C++ project is available in the downloads that accompany this course.
A POST WebApi is called from a WinRT app.
This tutorial will explain how an POST web api could be used through an C++ WinRT application. I've developed an WinRT console program that can connect and then posts a JSON string to a POST web API that then gets a response in string format from the application. It is then able to parse the json in the string. The C++ project is available for download in the downloads.
OpenAPI as well as Swagger to Web API Documentation
Swagger is a simple way to write a description of the Web Api that you have in your application. The overview of the API is kept in a json-based file known as openapi.json. This is your main document. It's an intermediate document that can be used to create an online page called SwaggerUI that displays the entire web API in a vibrant, human-accessible interface. Each web api is able to be tested immediately and run. It's evident that SwaggerUI is than Postman. Postman software.
Configuring and using Swagger to run WebApi
We can now set up the WebApi project to include SwaggerUI support. SwaggerUI. We've already mentioned that SwaggerUI is available from each of Swashbuckle as well as NSwag. It is possible to choose between the two. I will use Swashbuckle.
Call an GET Web API from an C# WPF Application
In this course, we'll discover how to invoke the various WebApi API types through the C# WPF application. I've already developed an WPF application that pulls in an array of records from our web API project and renders them into a grid. It is an GET web api request which calls a set of records. The same window in WPF contains a form for creating an entirely new record. this is accomplished with an API call to the POST web API. When a user clicks on a record within that WPF screen, a pop-up appears which allows the user to modify the record. It's an attempt to call the PUT Web Api. The same dialog contains the delete button, which makes an attempt to call the Web Api DELETE.
Call an POST Web API from an C# WPF Application
This tutorial is a continuation of our previous guide. We've covered most of the components in the previous tutorial. Also, please read the previous tutorial to ensure continuity. The next step is to use an POST WebApi from our Wpf Application, and make an entirely new record.
Create a PUT and DELETE API for Web API from an C# Windows Presentation Framework
As you've probably observed in our previous tutorials, we've got an application in WPF that retrieves the records of the ASPNET Core web api application and displays them in an WPF datagrid. When a row on the grid is clicked, the dialog appears that displays an edit form for the record. The save button in this form is connected to a click event handler which sends a PUT request to web api, which changes the record. The delete option on this form triggers an incoming call to a DELETE web API.
The Introduction of HttpRepl testing Web Api
Http Repl can be described as a command line tool that allows you to test the web API. This tool is designed to work with an ASP.NET core environment. Let's take a look an overview of this tool. We'll also find out how to enable it in Visual Studio. In the coming tutorials we will be using it to make some web API calls.
Connecting HttpRepl web Api Endpoint
Before we can run or test any Web API it is necessary to establish an internet connection to httprepl with our website server. If you're reading this chapter, you've probably noticed that every one of our templates for route creation begins with the phrase "doctor". Technically speaking, it's an end-point. The goal the tutorial aims to teach the steps to make a connection to an server and then to obtain the list of endpoints available and then get to a specific point that is "doctor" in our case. In the following tutorials, we will make calls to the various web apis we've already integrated into our web API project.
Testing the web Api using HttpRepl
Now is the time to implement httprepl to test our web API. In the beginning testing, we'll try an GET API. I will suppose that you have an httprepl that has been installed and working. If you find it difficult to use it is possible that you need to go through the first two tutorials to learn the fundamentals of httprepl.
Testing an HTTP POST Web Api using HttpRepl
In this tutorial , we will examine the POST Web Api to create an entirely new record. This means that we must first establish the connecting with httprepl with our website server after that, we'll need to publish the json of the new record we will create to the web server. Let's find out what we can do!
Utilizing an static class to implement Route Handlers within the form of a Minimal WebApi
As of now, we've written all of our basic web APIs into our program.cs file. However, this file can become inaccessible and difficult to read in a fully complete project. There is a way of organizing our web API so it can be kept in a separate class of their ownwithin the file they have created. There is even the possibility of having multiple classes with each class having all related web API such as those used by an a physician within one folder, and the ones of a patient are in a different. In this article, we will go over an in-depth look at the different possibilities and then I present how to implement the system which Personally, I prefer.
[FromQueryBinding of Parameters in the variable called QueryString
We've been getting our web API parameters via route templates. The route isn't the sole source of parameters. In fact, the parameters are available from query strings or header value, and also in the content of the query as well. In this guide, we'll look at how to extract the parameters from query string variables and then make the parameter optional.
[FromHeaderParameter Binding of the Header of a Request
The parameters of a web API can be found in the contents of the headers for a request as well. In this case, an attribute named "FromHeader" is used to embellish a parameter and also provides an easy way to access the value that is contained in the header with this name. In this tutorial, we will discover how to connect the header to a web API parameter. To ensure continuity, please refer to the previous tutorial, where we learned how to connect the query string variable to an element.
Special Kinds of Implicit Parameter Bindings
ASP.NET Core provides certain "special" parameters accessible to an api handler. These include "utility" parameters like HttpContext, HttpRequest, HttpResponse, CancellationToken and ClaimsPrincipal. They don't require any attributes decorations, similar to those used for the query-string, header body, and segmentation of routes.
Flexible Binding API Parameters
Imagine a web-based api that takes parameters x, the y and the z from the query string, and then utilizes these parameters to create an Point object, for instance, by giving these data to a constructor within the Point class. The program can be improved by passing a single string , which is a comma-separated set of three numbers. the string will be converted into a Point class. This method of customizing binding is the topic of this guide.
BindAsync to Customize Binding WebApi Parameters
BindAsync is a third method to create custom bindings of parameters. The first method - TryParse, is suitable for situations where the elements are in one string, most likely an query string or a header value or a road segment. If you require greater degree of control on the process of binding then the more robust parameter, such as HttpContext, is more appropriate as is the BindAsync method is exactly what you need. It creates an authentication signature that includes HttpContext as an option.
File Upload via an WebApi
In this video, we'll look at how to create a web api that accepts a file uploaded and then saves it to an online server. Also, we will present an C# console application that uploads a file to this web API. Let's find out how!
Basic Authentication WebApi
Basic Authentication cannot be incorporated by ASP.NET Core since login ID and password are transmitted to the user in plaintext in the header of the request and are therefore susceptible to XSRF as well. Therefore, there aren't any ready-made classes similar to the ones we use to enable cookies-based authentication. What if your project requires basic authentication? Maybe because your security needs are not of the advanced technology? In that case, we offer an easy method to help you secure a web-api by using basic authorization. It's much more secure using Basic Authentication when your communications are conducted over HTTPS, and even more secure if XSRF security measures are implemented that are beyond the topic of this article.
HandleAuthenticateAsync and Basic Authentication in WebApi
The recommended way of implementing a custom authentication scheme is by deriving a class from AuthenticationHandler and implementing the HandleAuthenticateAsync function. This allows the code to be more systematic since the header and authentication parsing code has been moved to a class. This lets us include several authentication options within the same project, for instance, you may require one web API to be authorized using basic authentication, while another using the use of JWT -based security, but still be able to access your razor pages are authorized with cookie-based authentication. In this tutorial, we'll use the standard authentication scheme.
JWT authentication in WebApi
JWT is the acronym for JSON Web Token. In its most basic form, JWT authentication is a two-step process. The first step is to obtain the JWT certificate from the server. The token is then signed using an encrypted key that is secure and secured with a standard encryption method. It is valid for a certain time and the details of claims including the user-id username, email address and so on. The client is granted permission to use a web api by sending this token to the authorization header. In this video, we will look at a server-side execution of the program used for creating the JWT token and for safeguarding a web API.
C# Console App Connectivity for Basic and JWT authentication
In this tutorial, we will present the C# console application that connects to the web API which we covered previously in our previous lesson. The app first acquires the JWT token by submitting its login credentials to a standard authorization header. Then, it will use the token as the bearer header to gain authorization for the second api, which is protected through JWT Authorization. Check out the previous tutorial in which we've explained both web apis and the.
The creation of a Google OAuth App to authenticate users
Social media-based authentication requires us to build an oauth-based application that is hosted that is on a social media site like google, Facebook Twitter, GitHub. This app will provide us with clients with a unique identifier and client secret key to use in various classes that offer the integration of social media. In this video tutorial, we will provide the steps to create an Oauth-based app for the Google Cloud Console. The steps for other social media are the same - you can use the steps to practice.
Social Media Authentication in WebApi
WebApi can be secured through social media authentication, too. First, get an ID for the client and a client secret by establishing an app on an online social network. Then , these numbers are used to set up authentication services on the platform. In this video tutorial, we'll show the steps needed to get authorization for the web API that is secured by Google Authentication.
- Minimal WebApi for C# ASPNET Core (Visual Studio 2022 and later)
- PUT, GET and DELETE different types of information
- Dialing from your desktop C++ App, C# Console, C# WPF Apps
- Utilization of HttpRepl
- Parameter Binding of QueryString Parameters, header binding, and customized bindings
- FileUpload using WebApi
- JWT server and client Side Authentication
- Basic authentication
- Social Media-based Authentication (Google)