GoogleOauth2问题导致内部服务器500错误

Question

我决定尝试新的Google Oauth2中间件,它几乎打破了一切.这是来自startup.auth.cs的我的提供程序配置.启用后,所有提供商(包括Google提供商)都会在Challenge上获得500内部服务器.但是,内部服务器错误的详细信息不可用,我无法弄清楚如何打开Katana中间件的任何调试或跟踪.在我看来,他们急于将谷歌Oauth中间件推出门外.

  //// GOOGLE
        var googleOptions = new GoogleOAuth2AuthenticationOptions
        {
            ClientId = "228",
            ClientSecret = "k",
            CallbackPath = new PathString("/users/epsignin")
            SignInAsAuthenticationType = DefaultAuthenticationTypes.ExternalCookie,
            Provider = new GoogleOAuth2AuthenticationProvider
            {
                OnAuthenticated = context =>
                {
                    foreach (var x in context.User)
                    {
                        string claimType = string.Format("urn:google:{0}", x.Key);
                        string claimValue = x.Value.ToString();
                        if (!context.Identity.HasClaim(claimType, claimValue))
                            context.Identity.AddClaim(new Claim(claimType, claimValue, XmlSchemaString, "Google"));
                    }
                    return Task.FromResult(0);
                }
            }
        };

        app.UseGoogleAuthentication(googleOptions);

ActionMethod代码:

 [AllowAnonymous]
    public ActionResult ExternalProviderSignIn(string provider, string returnUrl)
    {
       var ctx = Request.GetOwinContext();
        ctx.Authentication.Challenge(
            new AuthenticationProperties
            {
                RedirectUri = Url.Action("EPSignIn", new { provider })
            },
            provider);
        return new HttpUnauthorizedResult();
    }

Answer 1

这花了我几个小时才弄清楚,但问题是CallbackPath@CrazyCoder提到的问题.我意识到,CallbackPath在public void ConfigureAuth(IAppBuilder app) 必须是当它在被设置成不同ChallengeResult.如果它们是相同的,则在OWIN中抛出500错误.

我的代码ConfigureAuth(IAppBuilder app)是

var googleOptions = new Microsoft.Owin.Security.Google.GoogleOAuth2AuthenticationOptions
{
    ClientId = "xxx",
    ClientSecret = "yyy",
    CallbackPath = new PathString("/callbacks/google"), //this is never called by MVC, but needs to be registered at your oAuth provider

    Provider = new GoogleOAuth2AuthenticationProvider
    {
        OnAuthenticated = (context) =>
        {
            context.Identity.AddClaim(new Claim("picture", context.User.GetValue("picture").ToString()));
            context.Identity.AddClaim(new Claim("profile", context.User.GetValue("profile").ToString()));
            return Task.FromResult(0);
        }      
    }
};

googleOptions.Scope.Add("email");

app.UseGoogleAuthentication(googleOptions);

我的'回调'控制器代码是:

// GET: /callbacks/googlereturn - callback Action
[AllowAnonymous]
public async Task<ActionResult> googlereturn()
{
        return View();
}

//POST: /Account/GooglePlus
public ActionResult GooglePlus()
{
    return new ChallengeResult("Google", Request.Url.GetLeftPart(UriPartial.Authority) + "/callbacks/googlereturn", null);  
    //Needs to be a path to an Action that will handle the oAuth Provider callback
}

private class ChallengeResult : HttpUnauthorizedResult
{
    public ChallengeResult(string provider, string redirectUri)
        : this(provider, redirectUri, null)
    {
    }

    public ChallengeResult(string provider, string redirectUri, string userId)
    {
        LoginProvider = provider;
        RedirectUri = redirectUri;
        UserId = userId;
    }

    public string LoginProvider { get; set; }
    public string RedirectUri { get; set; }
    public string UserId { get; set; }

    public override void ExecuteResult(ControllerContext context)
    {
        var properties = new AuthenticationProperties() { RedirectUri = RedirectUri };
        if (UserId != null)
        {
            properties.Dictionary[XsrfKey] = UserId;
        }
        context.HttpContext.GetOwinContext().Authentication.Challenge(properties, LoginProvider);
    }
}

• 回调/谷歌似乎由OWIN处理
• 回调/ googlereturn似乎由MVC处理

它现在都在工作,虽然很想知道'在发动机罩下'到底发生了什么

除非你有其他要求,否则我的建议是让OWIN使用默认的重定向路径,并确保你自己不使用它们.

Answer 2

没有必要指定CallbackPath的UseGoogleAuthentication:

CallbackPath = new PathString("/Account/ExternalLoginCallback")

只需将授权重定向的Google设置保持URIs为:

http(s):// yoururl:orPort/signin -google

Owin在内部处理signin-google并重定向到redirectUri,如ChallengeResult类的代码中所述.哪个是Account/ExternalLoginCallback.