我的 ASP.NET Core 应用程序使用“开箱即用”的外部登录身份验证。我想要实现的是,在 Facebook 挑战后,我想要包装重定向 URL 并将其作为 JSON 返回以在 jQuery 前端中使用。但在请求结束后,我在浏览器中看到 500 错误,并看到应用程序控制台中的下一个错误:
``` fail: Microsoft.AspNetCore.Server.Kestrel[13] Connection id "0HLV651D6KVJC", Request id "0HLV651D6KVJC:00000005": An unhandled exception was thrown by the application. System.InvalidOperationException: Response Content-Length mismatch: too few bytes written (0 of 470). ```
我的外部登录行动没有什么特别之处。
``` fail: Microsoft.AspNetCore.Server.Kestrel[13] Connection id "0HLV651D6KVJC", Request id "0HLV651D6KVJC:00000005": An unhandled exception was thrown by the application. System.InvalidOperationException: Response Content-Length mismatch: too few bytes written (0 of 470). ```
我的外部登录行动没有什么特别之处。
[HttpPost]
[AllowAnonymous]
[ValidateAntiForgeryToken]
public IActionResult ExternalLogin(string provider, string returnUrl = null)
{
// Request a redirect to the external login provider.
var redirectUrl = Url.Action(nameof(ExternalLoginCallback), "Account", new { returnUrl });
var properties = _signInManager.ConfigureExternalAuthenticationProperties(provider, redirectUrl);
return Challenge(properties, provider);
}
Facebook认证配置:
services.AddAuthentication().AddFacebook(facebookOptions =>
{
facebookOptions.AppId = Configuration["Authentication:Facebook:AppId"];
facebookOptions.AppSecret = Configuration["Authentication:Facebook:AppSecret"];
facebookOptions.Events.OnRedirectToAuthorizationEndpoint =
async (x) =>
{
UTF8Encoding encoding = new UTF8Encoding();
var content = JsonConvert.SerializeObject(new { redirect_url = x.RedirectUri });
byte[] bytes = encoding.GetBytes(content);
x.Response.StatusCode = 200;
x.Response.ContentLength = bytes.Length;
x.Response.ContentType = "text/plain";
x.Response.Body = new MemoryStream();
await x.Response.WriteAsync(content);
// at this point I see that x.Response.Body.Length == 470, but message states there are 0 of 470 written
};
});
有没有什么办法让它工作?