[blazor] Read appsettings loaded by the runtime into the VFS (#48326)

Author: maraf

src/Components/Web.JS/src/Platform/Mono/MonoPlatform.ts

@@ -17,7 +17,6 @@ import { WebAssemblyComponentDescriptor, discoverComponents, discoverPersistedSt
 import { attachRootComponentToElement, attachRootComponentToLogicalElement } from '../../Rendering/Renderer';
 import { WebAssemblyComponentAttacher } from '../WebAssemblyComponentAttacher';
 import { fetchAndInvokeInitializers } from '../../JSInitializers/JSInitializers.WebAssembly';
-import { WebAssemblyConfigLoader } from '../WebAssemblyConfigLoader';
 
 // initially undefined and only fully initialized after createEmscriptenModuleInstance()
 export let BINDING: BINDINGType = undefined as any;
@@ -280,9 +279,9 @@ function prepareRuntimeConfig(options: Partial<WebAssemblyStartOptions>, platfor
       }
     };
 
-    platformApi.jsInitializer = await fetchAndInvokeInitializers(bootConfig, options);
+    Blazor._internal.getApplicationEnvironment = () => bootConfig.applicationEnvironment!;
 
-    WebAssemblyConfigLoader.initAsync(bootConfig, bootConfig.applicationEnvironment!, options || {});
+    platformApi.jsInitializer = await fetchAndInvokeInitializers(bootConfig, options);
   };
 
 

src/Components/Web.JS/src/Platform/WebAssemblyConfigLoader.ts

@@ -159,9 +159,10 @@ private WebAssemblyHostEnvironment InitializeEnvironment(IInternalJSImportMethod
 
         foreach (var configFile in configFiles)
         {
-            var appSettingsJson = jsMethods.GetConfig(configFile);
-            if (appSettingsJson != null)
+            if (File.Exists(configFile))
             {
+                var appSettingsJson = File.ReadAllBytes(configFile);
+
                 // Perf: Using this over AddJsonStream. This allows the linker to trim out the "File"-specific APIs and assemblies
                 // for Configuration, of where there are several.
                 Configuration.Add<JsonStreamConfigurationSource>(s => s.Stream = new MemoryStream(appSettingsJson));

src/Components/WebAssembly/WebAssembly/src/Hosting/WebAssemblyHostBuilder.cs

@@ -9,8 +9,6 @@ internal interface IInternalJSImportMethods
 
     string GetApplicationEnvironment();
 
-    byte[]? GetConfig(string configFile);
-
     void NavigationManager_EnableNavigationInterception();
 
     void NavigationManager_ScrollToElement(string id);

src/Components/WebAssembly/WebAssembly/src/Services/IInternalJSImportMethods.cs

@@ -19,9 +19,6 @@ public string GetPersistedState()
     public string GetApplicationEnvironment()
         => GetApplicationEnvironmentCore();
 
-    public byte[]? GetConfig(string configFile)
-        => GetConfigCore(configFile);
-
     public void NavigationManager_EnableNavigationInterception()
         => NavigationManager_EnableNavigationInterceptionCore();
 
@@ -61,9 +58,6 @@ public string RegisteredComponents_GetParameterValues(int id)
     [JSImport("Blazor._internal.getApplicationEnvironment", "blazor-internal")]
     private static partial string GetApplicationEnvironmentCore();
 
-    [JSImport("Blazor._internal.getConfig", "blazor-internal")]
-    private static partial byte[] GetConfigCore(string configFile);
-
     [JSImport(BrowserNavigationManagerInterop.EnableNavigationInterception, "blazor-internal")]
     private static partial void NavigationManager_EnableNavigationInterceptionCore();
 

src/Components/WebAssembly/WebAssembly/src/Services/InternalJSImportMethods.cs

@@ -17,9 +17,6 @@ public TestInternalJSImportMethods(string environment = "Production")
     public string GetApplicationEnvironment()
         => _environment;
 
-    public byte[] GetConfig(string configFile)
-        => null;
-
     public string GetPersistedState()
         => null;