Building RESTFul APIs with ASP.NET Core by Fabian Gosebrink

Modern REST-APIs are at the core of today's technology and distributed systems. In this session, Fabian explains how universal cross platform web APIs are built using the latest .NET Core technologies. After an introduction to the principles of REST, we dive into the technical details and explore how ASP.NET Core & Visual Studio 2017 are used to build the APIs of tomorrow.

About the speaker:

Fabian Gosebrink is a Microsoft MVP and a passionate web developer using ASP.NET/ASP.NET Core and AngularJS/Angular. He supports enterprise customers as a professional full stack software engineer, consultant and trainer. He is a speaker at international conferences, the founder of .NET-Day Switzerland, Offering Solutions Software and Co-founder of SwissAngular (www.swissangular.com). He is very active in the community and is an administrator of the largest German C#-Community, www.mycsharp.de.

Transcript

4. with Building RESTFul APIs ASP.NET Core
7. @FabianGosebrin
9. What is ASP.NET Core?
10. MVC + WebAPI + Web Pages ASP.NET Core
12. Faster Deployment Cycles
14. Tooling
15. Dependency Injection
16. Program.cs 1. public class Program 2. { 3. public static void Main(string[] args) 4. { 5. BuildWebHost(args).Run(); 6. } 7. 8. public static IWebHost BuildWebHost(string[] args) => 9. WebHost.CreateDefaultBuilder(args) 10. .UseStartup<Startup>() 11. .Build(); 12. }
17. public class Program { public static void Main(string[] args) { var host = new WebHostBuilder() .UseKestrel() .UseContentRoot(Directory.GetCurrentDirectory()) .UseIISIntegration() .UseStartup<Startup>() .Build(); host.Run(); } }
18. Startup.cs 1. public class Startup 2. { 3. public Startup(IConfiguration configuration) 4. { 5. Configuration = configuration; 6. } 7. 8. public IConfiguration Configuration { get; set; } 9. 10. public void ConfigureServices(IServiceCollection services) 11. { 12. services.AddOptions(); 13. services.AddCors(...); 14. 15. services.AddSingleton<IFoodRepository, FoodRepository>();
19. Kestrel
21. REST
22. What is Rest?
23. Rest is not WebAPI
24. Rest is not HTTP
26. Architectural Style
27. Rest Constraints
28. Richardson Maturity Model
30. STATUSCODES
31. GET /api/orders/ GET /api/orders/1
32. The Controller 1. [Route("api/[controller]")] 2. public class FoodController : Controller 3. { 4. private readonly IFoodRepository _foodRepository; 5. 6. public FoodController(IFoodRepository foodRepository) 7. { 8. _foodRepository = foodRepository; 9. } 10. 11. [HttpGet] 12. public IActionResult Get() 13. { 14. ICollection<FoodItem> foodItems = _foodRepository.GetAll(); 15. IEnumerable<FoodItemDto> dtos = foodItems
33. Documentation SWAGGER
35. VERSIONING
36. document.docx
37. document- nal.docx
38. document- nal- nal.docx
39. document- really- nal.docx
40. document- really- nal-end- of- discussion.docx
41. document- really- nal- approved-by- customer.docx
42. document- really- nal- approved-by- customer-with- alterations-
43. document-really- nal-approved-by- customer-with- alterations- suggested-by-his- assistant-and-his- wife-cause-
44. document-really- nal-approved-by- customer-with- alterations- suggested-by-his- assistant-and-his- wife-cause-
46. API-VERSION: 2.0 /API/V2/HOUSES
47. DEMO
48. /api/houses?page=4&pageSize=10
49. /api/houses?orderby=Id
50. /api/houses?fields=street,number
51. SignalR
56. Le Fin
57. @FabianGosebrink https://swissangular.com https://github.com/FabianGosebrink https://github.com/FabianGosebrink WebAPI-Sample
58. Resources https://www.thefamouspeople.com/pro les/images/og-donald_trump_ ag.jpg https://timedotcom. les.wordpress.com/2017/07/gettyimages-810247620.jpg?w=720&quality=85 https://media.giphy.com/media/xUPOqFfyBzvODVNTNu/giphy.gif https://cdn.vox- cdn.com/thumbor/5BOvGGpVyW4hSPLTAEYvHng6JlQ=/0x0:2931x1649/1200x800/ lters:focal(1239x265:1707x733)/cdn.vox cdn.com/uploads/chorus_image/image/55610995/GettyImages_810247620.0.jpg https://media.giphy.com/media/1BXa2alBjrCXC/giphy.gif http://img0.joyreactor.com/pics/post/photo-india-it-programmer-548432.jpeg