Middleware in ASP.NET Core 2.x

At the core of ASP.NET Core is Microsoft’s implementation of the OWIN standard, giving developers full control over the ASP.NET pipeline. In this session I will explain what OWIN is and how it can empower you to quickly and easily reconfigure an entire web application. Now in full control, you can do everything from injecting custom code (middleware) into any stage of the pipeline to running lightweight applications and microservices without MVC.

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1. Custom Middleware & Microservices with ASP.NET Core 2.x ONDREJ BALAS @ONDREJBALAS WWW.ONDREJBALAS.COM ONDREJ@ONDREJBALAS.COM
2. ONDREJ BALAS Microsoft MVP in Developer Technologies Blog at ondrejbalas.com Consultant since 2001 Founded startup in 2017 Game development for fun WWW.ONDREJBALAS.COM ONDREJ@ONDREJBALAS.COM @ONDREJBALAS
5. Web Server & Host
6. Web Server & Host (IIS) TCP HTTP
7. Web Server & Host (IIS)
11. Web Server & Host (IIS)
12. Web Server & Host (IIS)
16. Source: https://docs.microsoft.com/en-us/aspnet/core/fundamentals/servers/ or http://bit.ly/2rDrfFZ
19. <configuration> <system.web> <httpModules> <add name="HelloWorldModule" type="HelloWorldModule"/> </httpModules> </system.web> </configuration> Implementing IHttpModule
20. Middleware is for cross-cutting concerns
21. Middleware is for cross-cutting concerns Logging
22. Middleware is for cross-cutting concerns Logging Access Control (Authentication & Authorization)
23. Middleware is for cross-cutting concerns Logging Access Control (Authentication & Authorization) Routing
24. Middleware is for cross-cutting concerns Logging Access Control (Authentication & Authorization) Routing Serving Special Content
25. Middleware is for cross-cutting concerns Logging Access Control (Authentication & Authorization) Routing Serving Special Content Any other time you want to do some THING between receiving a request and returning a response, even if that THING is preventing something else from happening.
29. MVC
30. public void Configure(IApplicationBuilder app, IHostingEnvironment env) { if (env.IsDevelopment()) app.UseDeveloperExceptionPage(); else { app.UseExceptionHandler("/Home/Error"); app.UseHsts(); } app.UseHttpsRedirection(); app.UseStaticFiles(); app.UseCookiePolicy(); app.UseMvc(routes => { routes.MapRoute( name: "default", template: "{controller=Home}/{action=Index}/{id?}"); Startup.cs
31. MVC CookiePolicy CookiePolicy HttpsRedir StaticFiles Developer ExceptionPage public void Configure(IApplicationBuilder app, IHostingEnvironment env) if (env.IsDevelopment()) app.UseDeveloperExceptionPage(); else { app.UseExceptionHandler("/Home/Error"); app.UseHsts(); } app.UseHttpsRedirection(); app.UseStaticFiles(); app.UseCookiePolicy(); app.UseMvc(routes => { routes.MapRoute( name: "default", template: "{controller=Home}/{action=Index}/{id?}"); }); }
32. MVC CookiePolicy CookiePolicy HttpsRedir StaticFiles Hsts ExHandler public void Configure(IApplicationBuilder app, IHostingEnvironment env) if (env.IsDevelopment()) app.UseDeveloperExceptionPage(); else { app.UseExceptionHandler("/Home/Error"); app.UseHsts(); } app.UseHttpsRedirection(); app.UseStaticFiles(); app.UseCookiePolicy(); app.UseMvc(routes => { routes.MapRoute( name: "default", template: "{controller=Home}/{action=Index}/{id?}"); }); }
33. MVC CookiePolicy CookiePolicy HttpsRedir StaticFiles Hsts ExHandler
34. MVC CookiePolicy CookiePolicy HttpsRedir StaticFiles Hsts ExHandler HttpContext
35. MVC CookiePolicy CookiePolicy HttpsRedir StaticFiles Hsts ExHandler HttpContext
36. Demo Time
37. // Do something before await _next(context); // Do something after Middleware
38. // Do something before await _next(context); // Do something after Middleware // Do something before await _next(context); // Do something after
39. // Do something before await _next(context); // Do something after Middleware // Do something before await _next(context); // Do something after // Do something before await _next(context); // Do something after
40. // Do something before await _next(context); // Do something after Middleware // Do something before await _next(context); // Do something after // Do something before await _next(context); // Do something after String Appender Static File MVC
41. // Do something before await _next(context); // Do something after Middleware // Do something before await _next(context); // Do something after // Do something before await _next(context); // Do something after String Appender Static File MVC
42. Demo Time
43. Thanks! ONDREJ BALAS WWW.ONDREJBALAS.COM ONDREJ@ONDREJBALAS.COM @ONDREJBALAS GITHUB.COM/ONDREJBALAS