![]() ![]() The /echo2 and Razor Pages endpoints do not allow cross-origin requests because no default policy was specified.The /echo and controller endpoints allow cross-origin requests using the specified policy.Because a default policy hasn't been configured, app.UseCors() alone doesn't enable CORS. app.UseCors enables the CORS middleware.With endpoint routing, CORS can be enabled on a per-endpoint basis using the RequireCors set of extension methods: var MyAllowSpecificOrigins = "_myAllowSpecificOrigins" Ĭontext => ("echo"))Ĭontext => ("echo2")) The preceding code applies the default CORS policy to all controller endpoints. The following highlighted code enables the default CORS policy: var builder = WebApplication.CreateBuilder(args) Apps that use JavaScript to retrieve static files cross site must call UseCors before UseStaticFiles. Typically, UseStaticFiles is called before UseCors. If the URL terminates with /, the comparison returns false and no header is returned. Note: The specified URL must not contain a trailing slash ( /). Options.AddPolicy(MyAllowSpecificOrigins, The CorsPolicyBuilder methods can be chained, as shown in the following code: var MyAllowSpecificOrigins = "_myAllowSpecificOrigins" ![]() The AddCors method call adds CORS services to the app's service container: var MyAllowSpecificOrigins = "_myAllowSpecificOrigins" įor more information, see CORS policy options in this document. ![]() See Test CORS for instructions on testing code similar to the preceding code. With endpoint routing, the CORS middleware must be configured to execute between the calls to UseRouting and UseEndpoints. When using Response Caching Middleware, call UseCors before UseResponseCaching.See endpoint routing to apply a CORS policy to specific endpoints. Enables the _myAllowSpecificOrigins CORS policy for all controller endpoints.Configuration options, such as WithOrigins, are described later in this article. ![]() The lambda takes a CorsPolicyBuilder object.
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