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Razor Components Authentication

The definitive guide to form-based website authenticationRESTful AuthenticationHow should I choose an authentication library for CodeIgniter?What is token based authentication?How do I import a namespace in Razor View Page?Use basic authentication with jQuery and AjaxAuthentication versus AuthorizationAuthenticating a user in a MVC application using JSON Web TokensHow to use AuthenticationManager SignIn when using OpenIdCan authentication cookie be shared between two .Net Core 2.0 applications?

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0

1

How would one use authentication SignInAsync as a call from a razor component.
It seems to throw some errors due to the context being in a late state of the pipeline.

Error when HttpContext.SignInAsync is called:

System.AggregateException: 'One or more errors occurred. (The response headers cannot be modified because the response has already started.)' 
InvalidOperationException: The response headers cannot be modified because the response has already started.

Here is the UserState.cs where the SignIn is implemented.

public class UserState


 readonly IHttpContextAccessor Context;

 public UserState(IHttpContextAccessor Context)
 
 this.Context = Context;
 

 public string DisplayName get; set; 

 public ClaimsPrincipal User => Context.HttpContext.User;

 public bool IsLoggedIn => User?.Identity.IsAuthenticated ?? false;

 public void SignIn()
 
 var claims = new List<Claim> 
 new Claim(ClaimTypes.Name, "Bob", ClaimValueTypes.String),
 new Claim(ClaimTypes.Surname, "Builder", ClaimValueTypes.String),
 ;
 var userIdentity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
 var userPrincipal = new ClaimsPrincipal(userIdentity);

 Context.HttpContext.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme, userPrincipal,
 new AuthenticationProperties
 
 ExpiresUtc = DateTime.UtcNow.AddMinutes(20),
 IsPersistent = true,
 AllowRefresh = true
 ).Wait();
 

method is called and injected as such:

@page "/"
@inject UserState User

@if (User.IsLoggedIn)

 <p>You are logged in</p>
 else 
 <p>You are NOT logged in</p>


<button onclick="@User.SignIn">Login</button>

Is there a way to signin get a success response and then refresh the page from the SignIn method.

Ive seen some similar implementation using MVC controllers. Is there no way of invoking a authentication request without involving mvc?

c# asp.net authentication razor-components

share|improve this question

asked Mar 28 at 21:31

Theodor SolbjørgTheodor Solbjørg

57355 silver badges1515 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  <button onclick="@User.SignIn">Login</button> should go inside the else right?
  
  – dcg
  Mar 28 at 21:38
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What does it mean <button onclick="@User.SignIn">Login</button>? It doesn't even compile
  
  – Alexander
  Mar 28 at 23:57
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Using Razor Components .NET Core 3.0 (Visual Studio 2019)
  
  – Theodor Solbjørg
  Mar 29 at 0:02
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did you ever solve this? I have the same problem (Server-side Blazor).
  
  – Fred
  Jun 20 at 5:09
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  No, I ended up having a Razor Page that the app redirects to when auth is needed. seems messing with the httpcontext mid request is a big no-no, but weird that blazor does not have a pre-request handler we can hook in too. leaving it open for some genius to answer tho'
  
  – Theodor Solbjørg
  Jun 21 at 12:56
  

  
  
  
  

add a comment
 | 

0

1

How would one use authentication SignInAsync as a call from a razor component.
It seems to throw some errors due to the context being in a late state of the pipeline.

Error when HttpContext.SignInAsync is called:

System.AggregateException: 'One or more errors occurred. (The response headers cannot be modified because the response has already started.)' 
InvalidOperationException: The response headers cannot be modified because the response has already started.

Here is the UserState.cs where the SignIn is implemented.

public class UserState


 readonly IHttpContextAccessor Context;

 public UserState(IHttpContextAccessor Context)
 
 this.Context = Context;
 

 public string DisplayName get; set; 

 public ClaimsPrincipal User => Context.HttpContext.User;

 public bool IsLoggedIn => User?.Identity.IsAuthenticated ?? false;

 public void SignIn()
 
 var claims = new List<Claim> 
 new Claim(ClaimTypes.Name, "Bob", ClaimValueTypes.String),
 new Claim(ClaimTypes.Surname, "Builder", ClaimValueTypes.String),
 ;
 var userIdentity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
 var userPrincipal = new ClaimsPrincipal(userIdentity);

 Context.HttpContext.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme, userPrincipal,
 new AuthenticationProperties
 
 ExpiresUtc = DateTime.UtcNow.AddMinutes(20),
 IsPersistent = true,
 AllowRefresh = true
 ).Wait();
 

method is called and injected as such:

@page "/"
@inject UserState User

@if (User.IsLoggedIn)

 <p>You are logged in</p>
 else 
 <p>You are NOT logged in</p>


<button onclick="@User.SignIn">Login</button>

Is there a way to signin get a success response and then refresh the page from the SignIn method.

Ive seen some similar implementation using MVC controllers. Is there no way of invoking a authentication request without involving mvc?

c# asp.net authentication razor-components

share|improve this question

asked Mar 28 at 21:31

Theodor SolbjørgTheodor Solbjørg

57355 silver badges1515 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  <button onclick="@User.SignIn">Login</button> should go inside the else right?
  
  – dcg
  Mar 28 at 21:38
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What does it mean <button onclick="@User.SignIn">Login</button>? It doesn't even compile
  
  – Alexander
  Mar 28 at 23:57
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Using Razor Components .NET Core 3.0 (Visual Studio 2019)
  
  – Theodor Solbjørg
  Mar 29 at 0:02
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did you ever solve this? I have the same problem (Server-side Blazor).
  
  – Fred
  Jun 20 at 5:09
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  No, I ended up having a Razor Page that the app redirects to when auth is needed. seems messing with the httpcontext mid request is a big no-no, but weird that blazor does not have a pre-request handler we can hook in too. leaving it open for some genius to answer tho'
  
  – Theodor Solbjørg
  Jun 21 at 12:56
  

  
  
  
  

add a comment
 | 

How would one use authentication SignInAsync as a call from a razor component.
It seems to throw some errors due to the context being in a late state of the pipeline.

Error when HttpContext.SignInAsync is called:

System.AggregateException: 'One or more errors occurred. (The response headers cannot be modified because the response has already started.)' 
InvalidOperationException: The response headers cannot be modified because the response has already started.

Here is the UserState.cs where the SignIn is implemented.

public class UserState


 readonly IHttpContextAccessor Context;

 public UserState(IHttpContextAccessor Context)
 
 this.Context = Context;
 

 public string DisplayName get; set; 

 public ClaimsPrincipal User => Context.HttpContext.User;

 public bool IsLoggedIn => User?.Identity.IsAuthenticated ?? false;

 public void SignIn()
 
 var claims = new List<Claim> 
 new Claim(ClaimTypes.Name, "Bob", ClaimValueTypes.String),
 new Claim(ClaimTypes.Surname, "Builder", ClaimValueTypes.String),
 ;
 var userIdentity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
 var userPrincipal = new ClaimsPrincipal(userIdentity);

 Context.HttpContext.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme, userPrincipal,
 new AuthenticationProperties
 
 ExpiresUtc = DateTime.UtcNow.AddMinutes(20),
 IsPersistent = true,
 AllowRefresh = true
 ).Wait();
 

method is called and injected as such:

@page "/"
@inject UserState User

@if (User.IsLoggedIn)

 <p>You are logged in</p>
 else 
 <p>You are NOT logged in</p>


<button onclick="@User.SignIn">Login</button>

Is there a way to signin get a success response and then refresh the page from the SignIn method.

Ive seen some similar implementation using MVC controllers. Is there no way of invoking a authentication request without involving mvc?

c# asp.net authentication razor-components

share|improve this question

asked Mar 28 at 21:31

Theodor SolbjørgTheodor Solbjørg

57355 silver badges1515 bronze badges

System.AggregateException: 'One or more errors occurred. (The response headers cannot be modified because the response has already started.)' 
InvalidOperationException: The response headers cannot be modified because the response has already started.

public class UserState


 readonly IHttpContextAccessor Context;

 public UserState(IHttpContextAccessor Context)
 
 this.Context = Context;
 

 public string DisplayName get; set; 

 public ClaimsPrincipal User => Context.HttpContext.User;

 public bool IsLoggedIn => User?.Identity.IsAuthenticated ?? false;

 public void SignIn()
 
 var claims = new List<Claim> 
 new Claim(ClaimTypes.Name, "Bob", ClaimValueTypes.String),
 new Claim(ClaimTypes.Surname, "Builder", ClaimValueTypes.String),
 ;
 var userIdentity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
 var userPrincipal = new ClaimsPrincipal(userIdentity);

 Context.HttpContext.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme, userPrincipal,
 new AuthenticationProperties
 
 ExpiresUtc = DateTime.UtcNow.AddMinutes(20),
 IsPersistent = true,
 AllowRefresh = true
 ).Wait();
 

@page "/"
@inject UserState User

@if (User.IsLoggedIn)

 <p>You are logged in</p>
 else 
 <p>You are NOT logged in</p>


<button onclick="@User.SignIn">Login</button>

share|improve this question

asked Mar 28 at 21:31

Theodor SolbjørgTheodor Solbjørg

57355 silver badges1515 bronze badges

share|improve this question

asked Mar 28 at 21:31

Theodor SolbjørgTheodor Solbjørg

57355 silver badges1515 bronze badges

asked Mar 28 at 21:31

Theodor SolbjørgTheodor Solbjørg

57355 silver badges1515 bronze badges

asked Mar 28 at 21:31

Theodor SolbjørgTheodor Solbjørg

57355 silver badges1515 bronze badges