Ensure request services middleware is registered before React middleware.

Daniel15 · Daniel15 · commit 811bc6715228 · 2015-03-02T20:58:18.000-08:00
diff --git a/src/React.AspNet/HttpContextLifetimeProvider.cs b/src/React.AspNet/HttpContextLifetimeProvider.cs
@@ -57,7 +57,15 @@ private PerRequestRegistrations Registrations
 		{
 			get
 			{
-				var registrations = HttpContext.RequestServices.GetService<PerRequestRegistrations>();
+				var requestServices = HttpContext.RequestServices;
+				if (requestServices == null)
+				{
+					throw new ReactNotInitialisedException(
+						"ASP.NET request services have not been initialised correctly. Please " +
+						"ensure you are calling app.UseRequestServices() before app.UseReact()."
+					);
+				}
+				var registrations = requestServices.GetService<PerRequestRegistrations>();
 				if (registrations == null)
 				{
 					throw new ReactNotInitialisedException(

Original file line number	Diff line number	Diff line change
`@@ -57,7 +57,15 @@ private PerRequestRegistrations Registrations`
`57`	`57`	`{`
`58`	`58`	`get`
`59`	`59`	`{`
`60`		`- var registrations = HttpContext.RequestServices.GetService<PerRequestRegistrations>();`
	`60`	`+ var requestServices = HttpContext.RequestServices;`
	`61`	`+ if (requestServices == null)`
	`62`	`+ {`
	`63`	`+ throw new ReactNotInitialisedException(`
	`64`	`+ "ASP.NET request services have not been initialised correctly. Please " +`
	`65`	`+ "ensure you are calling app.UseRequestServices() before app.UseReact()."`
	`66`	`+ );`
	`67`	`+ }`
	`68`	`+ var registrations = requestServices.GetService<PerRequestRegistrations>();`
`61`	`69`	`if (registrations == null)`
`62`	`70`	`{`
`63`	`71`	`throw new ReactNotInitialisedException(`