JSON web tokens enable a secure way to transmit data between two parties in the form of a JSON object. We will use this project later on too, to define our contracts for the whole application. This is required for migration to work properly. Once the work is done, a thread is going back to the thread pool. Finally, as always, data shaping should work well together with the concepts weve covered so far paging, filtering, searching, and sorting. The overriding rules are the same. In our main project, we are referencing the LoggerService, Repository, and Entities projects. The reason is if we change the database, we also have to change the properties in a model but that doesnt mean our clients want the result changed. If you are interested in buying multiple copies for your employees, or a company, let us know and we can offer a team licence. Here, we are giving you the list of ASP.NET Core Web API Books based on the experience of Learners and Professionals. Since we are finished with the database model creation, we can transfer that model to the real database. Unsere Partner sammeln Daten und verwenden Cookies zur Personalisierung und Messung von Anzeigen. Additionally, it allows us to check the capabilities of a server without forcing action to retrieve a resource. So, first the interface modification: public interface IEmployeeRepository { Task GetEmployeesAsync(Guid companyId, EmployeeParameters employeeParameters, bool trackChanges); Task GetEmployeeAsync(Guid companyId, Guid id, bool trackChanges); void CreateEmployeeForCompany(Guid companyId, Employee employee); void DeleteEmployee(Employee employee); } And the repository logic: public async Task GetEmployeesAsync(Guid companyId, EmployeeParameters employeeParameters, bool trackChanges) => await FindByCondition(e => e.CompanyId.Equals(companyId), trackChanges) .OrderBy(e => e.Name) .Skip((employeeParameters.PageNumber - 1) * employeeParameters.PageSize) .Take(employeeParameters.PageSize) .ToListAsync(); Okay, the easiest way to explain this is by example. As you can see, we have three checks in our code and they are familiar to us. If we take a look at the Company class, we can see different data annotation attributes above our properties: Those attributes serve the purpose to validate our model object while creating or updating resources in the database. There are several links that we are going to create in this action. Right now if we send a request to the GetCompanies action, we are still going to get the 401 Unauthorized response even though we have successful authentication. So, lets cover them as well. Tip: If you are using Windows 8 and having trouble starting this application on https://localhost:5001 , you have to add a parameter to the appsetings.Development.json file: "Kestrel": { "EndpointDefaults": { "Protocols": "Http1" } } As a result, you will see an array of two strings. After that, we are going to use this extension in the ConfigureServices method: services.ConfigureVersioning(); API versioning is installed and configured, and we can move on. API is evolvable without breaking all the clients. Ok(links.LinkedEntities) : Ok(links.ShapedEntities); } Excellent. Therefore, if a client doesnt state the required version, our API will use this one: 218 https://localhost:5001/api/companies You can see that we have the fullAddress property in a result, which means that our original controller was called even though we didnt provide an API version in a request. So, lets start writing some code to see how it all adds up. In the second example, we remove the name property, thus setting its value to default. According to the configuration, the token is going to be valid if: 255 The issuer is the actual server that created the token (ValidateIssuer=true) The receiver of the token is a valid recipient (ValidateAudience=true) The token has not expired (ValidateLifetime=true) The signing key is valid and is trusted by the server (ValidateIssuerSigningKey=true) Additionally, we are providing values for the issuer, the audience, and the secret key that the server uses to generate the signature for JWT. Two things to notice here. Lets test this: https://localhost:5001/api/companies/0AD5B971-FF51-414D-AF01-34187E407557/employees/DE662003-ACC34F9F-9D82-0A74F64594C1 Excellent. Our responses contain an array of links, which consist of a few properties according to the RFC: href - represents a target URI. So, we just change the project for the migration assembly. You cannot access www.udemy.com. We are going to modify the code, step by step, to show you how easy is to convert synchronous code to asynchronous code. Build powerful HTTP services and make the most of the ASP.NET Core Web API platform. Then, weve populated the status code and the content type of our response, logged the error message, and finally returned the response with the custom created object. For the Company PATCH request, for example, we should use [FromBody]JsonPatchDocument and not [FromBody]Company as we did with the PUT requests. So, in this chapter, were going to learn how to implement paging in ASP.NET Core Web API. Enter Web API in the search box. Action filters They run right before and after action method execution. It will give you better insight into what we cover in the book and how we do that. I founded this blog so I can share the things I learn in the hope of both helping others and acquiring more knowledge on the topics I write about. Therefore, we are going to create links only to them. For that, lets open the api/authentication/login action, click try it out, add credentials, and copy the received token: 272 Once we have copied the token, we are going to click on the authorization button for the /api/companies request, paste it with the Bearer in front of it, and click Authorize: 273 After authorization, we are going to click on the Close button and try our request: And we get our response. "); return BadRequest("EmployeeForCreationDto object is null"); } if(!ModelState.IsValid) { _logger.LogError("Invalid model state for the EmployeeForCreationDto object"); return UnprocessableEntity(ModelState); } the rest of the code return CreatedAtRoute("GetEmployeeForCompany", new { companyId, id = employeeToReturn.Id }, employeeToReturn); 117 } And that is all. An IoC container is essentially a factory that is responsible for providing instances of the types that are requested from it. Setting the .NET CLR version to No Managed Code is optional but recommended. Additionally, the Swagger UI is also contained within Swashbuckle. 19.2 How to Implement Sorting in ASP.NET Core Web API 19.3 Implementation ? I want to learn NoSQL. For now, let's just assume we wrapped our links in another class for response representation purposes. Of course, we should learn a little more about Paging before we dive into code implementation. CORS (Cross-Origin Resource Sharing) is a mechanism to give or restrict access rights to applications from different domains. By calling the services.AddScoped method, we can create a service once per request. They add routing and authorization features to our application, respectively. To do that, we are going to add a new method in the ServiceExtensions class: public static void ConfigureSwagger(this IServiceCollection services) { services.AddSwaggerGen(s => { 267 s.SwaggerDoc("v1", new OpenApiInfo { Title = "Code Maze API", Version = "v1" }); s.SwaggerDoc("v2", new OpenApiInfo { Title = "Code Maze API", Version = "v2" }); }); } We are creating two versions of SwaggerDoc because if you remember, we have two versions for the Companies controller and we want to separate them in our documentation. 25.1.2 Response Cache Attribute So, to cache some resources, we have to know whether or not its cacheable. To provide information about rate limiting, we use the response headers. So, we are going to create one and store it in the environment variable because this is much safer than storing it inside the project. We can even limit the number of requests for a specific resource in our API; for example, 50 requests to api/companies . In this edition we use .NET Core SDK 3.1. But that doesnt work. To create the controller, right-click on the Controllers folder inside the main project and then Add=>Controller. Without it, a REST API cannot be considered RESTful and many of the benefits we get by implementing a REST architecture are unavailable. But we should be more restrictive with those settings in the production environment. Branches Tags. "descending" : "ascending"; We use the StringBuilder to build our query with each loop: orderQueryBuilder.Append($"{objectProperty.Name.ToString()} {direction}, "); Now that weve looped through all the fields, we are just removing excess commas and doing one last check to see if our query indeed has something in it: var orderQuery = orderQueryBuilder.ToString().TrimEnd(',', ' '); if (string.IsNullOrWhiteSpace(orderQuery)) return employees.OrderBy(e => e.Name); Finally, we can order our query: return employees.OrderBy(orderQuery); At this point, the orderQuery variable should contain the Name ascending, DateOfBirth descending string. Data shaping, on the other hand, enables us to return only the fields we want. public static class ServiceExtensions { } Lets start by implementing something we need for our project immediately so we can see how extensions work. Please add Accept header with the required media type. Ultimate asp.net core 6.0 Web API --- Read notes (30) This is a good practice because now we can, for example, add two companies, modify two employees, and delete one company all in one action and then just call the Save method once. If after two minutes, the same response has been requested: We can see that the cached response was served with an additional Age header with 120 seconds or two minutes. While creating our company, we created the DTO object required for the CreateCompany action. Good job guys! Look no further than this book! Furthermore, notice the company parameter which comes from the client. Searching is one of those functionalities that can make or break your API, and the level of difficulty when implementing it can vary greatly depending on your specifications. $97. 199 Add that to the Startup.cs class in the ConfigureServices method, just after the AddControllers method: services.AddCustomMediaTypes(); Excellent. So, lets talk a bit about sorting. Microsoft advises that the order of adding different middlewares to the application builder is very important. By using it, we are promoting a more loosely coupled approach to access our data in the database. As you can see, we use different configuration parameters that are pretty self-explanatory on their own. Step by Step 19.4 Testing Our Implementation 19.5 Improving the Sorting Functionality20 Data Shaping 20.1 What is Data Shaping? Here is a visual representation of the asynchronous workflow: Now that we've cleared that out, we can learn how to implement asynchronous code in .NET Core.
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