configure static files middleware to set Content-Type, Content-Encoding repsonse headers for gzipped resources accordingly

Author: kajan

AspNetCoreVueMpa.Web/Startup.cs

@@ -47,7 +47,29 @@ public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
                 app.UseHsts();
             }
             app.UseHttpsRedirection();
-            app.UseStaticFiles();
+            
+            app.UseStaticFiles(new StaticFileOptions
+            {
+                OnPrepareResponse = context =>
+                {
+                    var headers = context.Context.Response.Headers;
+                    var contentType = headers["Content-Type"];
+                    if (contentType == "application/x-gzip")
+                    {
+                        if (context.File.Name.EndsWith("js.gz"))
+                        {
+                            contentType = "application/javascript";
+                        }
+                        else if (context.File.Name.EndsWith("css.gz"))
+                        {
+                            contentType = "text/css";
+                        }
+
+                        headers.Add("Content-Encoding", "gzip");
+                        headers["Content-Type"] = contentType;
+                    }
+                }
+            });
 
             app.UseRouting();