ASP.NET Core CORS combining policies; enablecors in controller vs midleware configuration

ASP.NET Core CORS combining policies; enablecors in controller vs midleware configuration

Content Index :

ASP.NET Core CORS combining policies; enablecors in controller vs midleware configuration
Tag : chash , By : Matt Leacock
Date : November 24 2020, 05:49 AM

it should still fix some issue Why would you want to? The result is: CORS is enabled or its not (for one resource).
You can either do this by using the Attribute-Syntax ([EnableCors]) on your controller / your action-method, or make use of the fluent-api-design like in example with
services.AddCors(options => options...);

No Comments Right Now !

Boards Message :
You Must Login Or Sign Up to Add Your Comments .

Share : facebook icon twitter icon

ASP .NET Core use multiple CORS policies

Tag : javascript , By : Tigre
Date : March 29 2020, 07:55 AM
this will help To set a default CORS policy use app.UseCors(string policyName) overload.
Your CORS requests will be failing because you are rejecting all headers and methods. From what I read, the CORS specification states that you shouldn't set any headers at all if any of the checks fail. See implementation here, this is most likely why your client will be receiving the standard No 'Access-Control-Allow-Origin' header is present error, as no headers are added at all, even though the Origin check passes.
public void ConfigureServices(IServiceCollection services)
    services.AddCors(options =>
            builder => builder.WithOrigins("http://www.example.com")
            builder => builder.AllowAnyOrigin()

    //other configure stuff

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
    app.UseCors("AllowAll"); //Default


Cors configuration in .NET Core 2.0

Tag : asp.net-core , By : Ernie
Date : March 29 2020, 07:55 AM
may help you . Both your methods add * as origin, but builder.AllowAnyOrigin() also clear all other registered origins inside builder, so it is better to use it.
From the source code:
public CorsPolicyBuilder WithOrigins(params string[] origins)
     foreach (var req in origins)

     return this;

public CorsPolicyBuilder AllowAnyOrigin()
     // `CorsConstants.AnyOrigin` conts has `*` as value
     return this;

ASP.NET Core CORS configuration not working for Firefox

Tag : chash , By : kokok13
Date : March 29 2020, 07:55 AM
may help you . I found the problem and it was a really weird one. I was reading an older blog which talked about CORS and ASP.NET Core. Then I stumbled upon this comment which said that the solution worked for Kestrel, but not for IIS Express. So I changed my build configuration to not use IIS Express and it now works flawlessly for both browsers. If you want this to work for IIS Express, then you don't edit your Startup.cs, but you edit your application.config file which probably is located in your project root folder.

EnableCors C# .NET Core 3

Tag : chash , By : koder
Date : March 29 2020, 07:55 AM
To fix the issue you can do Unsure if anything changed in Core 3.0, but in 2.2 I would solve it like this: add this to ConfigureServices
services.AddCors(options =>
                builder => builder.AllowAnyOrigin()

Which authorization policy is used if multiple policies are specified (e.g. middleware configuration, controller/action

Tag : chash , By : keird
Date : March 29 2020, 07:55 AM
Hope that helps To access MyController , it should match both policies : the DefaultPolicy from RequireAuthorization and the custom Full policy . In addition , the DefaultPolicy could be updated by providing a policy to the UseAuthorization middleware :
services.AddAuthorization(options =>
    options.DefaultPolicy = new AuthorizationPolicyBuilder()
Related Posts Related QUESTIONS :
  • How can I create Prototype Methods (like JavaScript) in C#.Net?
  • DataTable Loop Performance Comparison
  • CSV string handling
  • What is the best way to do unit testing for ASP.NET 2.0 web pages?
  • High availability
  • What to use for Messaging with C#
  • Accessing a Dictionary.Keys Key through a numeric index
  • ConfigurationManager.AppSettings Performance Concerns
  • What Are Some Good .NET Profilers?
  • Is this a good way to determine OS Architecture?
  • How to create a tree-view preferences dialog type of interface in C#?
  • Searching directories for tons of files?
  • Can I have a method returning IEnumerator<T> and use it in a foreach loop?
  • Why can't I have abstract static methods in C#?
  • Displaying ad content from Respose.WriteFile()/ Response.ContentType
  • Convert integers to written numbers
  • Absolute path back to web-relative path
  • How can we generate getters and setters in Visual Studio?
  • Bringing Window to the Front in C# using Win32 API
  • Possible to "spin off" several GUI threads? (Not halting the system at Application.Run)
  • Reading a C/C++ data structure in C# from a byte array
  • How should I translate from screen space coordinates to image space coordinates in a WinForms PictureBox?
  • Setting Objects to Null/Nothing after use in .NET
  • Converting ARBG to RGB with alpha blending
  • Is it better to create Model classes or stick with generic database utility class?
  • Passing enum type to Converter with integer value
  • Pool of objects with objects that are already on the scene in advance
  • StatusBar text fade-out when binding using Caliburn.Micro
  • Queryfilter on ApplicationUser in OnModelCreating in ApplicationDbContext creates StackOverflowException
  • How to get record form a different table based on a value from first table with linq expression?
  • Show data in Grid from returned model
  • Using Attributes to Override Data Model Conventions
  • Basic OOP console calculator, result Error
  • Compositon and Repository pattern
  • Multiple using statements with if condition
  • How do i increase a number by 1 in every line that contain the number 1
  • Add binding to elements that are created in codebehind
  • How to add a column in an existing AspNetUsers table
  • Order a list of elements with another list of doubles
  • How to setup a NuGet package to copy content files to output build directory?
  • In SignalR Core using ChannelWriter: Do I need to call TryComplete twice if there's an exception?
  • C# GetProcessesByName: issue with colon
  • c# wpf | create complex object with user-defined name to Serialize into JSON
  • How can I get a instance of a generic list with reflection?
  • WPF XAML - Design time and visibility of textbox
  • EF Core and MySql query is too slow
  • Getting Registered App Display Name from an App Id
  • How to get all variables from a string
  • Delete entity with all childs connected
  • Azure Build agent cant´t find class library referance
  • Initialize Nested Dictionaries in c#
  • .Net Core Binding
  • Generic event test method, preventing code duplication
  • How do I keep the ellipses in the center when the screen is resized
  • How to require a property using JsonSchema.NET?
  • C# XDocument Element/Elements returns null
  • Autofac keyed service with IEnumerable relationship type
  • Installing EntityFramework via NuGet manager
  • Always Check if there is Internet Connection Xamarin forms
  • WCF OneWay service slows down when aspNetCompatibilityEnabled is set to false
  • shadow
    Privacy Policy - Terms - Contact Us © scrbit.com