运行用户流程：localhost 拒绝连接

Question

我有一个 blazor 应用程序。我使用 Azure AD B2C 进行身份验证。当我尝试运行登录用户流程时，我得到

This site can’t be reached

localhost refused to connect.

这是我的 launchSettings.json:

{
  "iisSettings": {
  "windowsAuthentication": false,
  "anonymousAuthentication": true,
  "iisExpress": {
    "applicationUrl": "http://localhost:54925",
    "sslPort": 44333
  }
},
"profiles": {
  "IIS Express": {
    "commandName": "IISExpress",
    "launchBrowser": true,
    "environmentVariables": {
      "ASPNETCORE_ENVIRONMENT": "Development"
    }
  },
  "MyAppName": {
    "commandName": "Project",
    "launchBrowser": true,
    "environmentVariables": {
      "ASPNETCORE_ENVIRONMENT": "Development"
    },
    "applicationUrl": "https://localhost:5001;http://localhost:5000"
  }
}
}

来自appsettings.json:

"AzureAdB2C": {
  "Instance": "https://laticreteb2c.b2clogin.com",
  "ClientId": "Set in Azure. For development, set in User Secrets (secrets.json)",
  "CallbackPath": "/signin-oidc",
  "Domain": "laticreteb2c.onmicrosoft.com",
  "SignOutCallbackPath": "/signout",
  "SignUpSignInPolicyId": "B2C_1_MyAppName_SignIn",

  "ResetPasswordPolicyId": "MyAppName_PasswordReset",
  "EditProfilePolicyId": "",
  "ClientSecret": "Set in Azure. For development, set in User Secrets (secrets.json)",
  "TenantId": "Set in Azure. For development, set in User Secrets (secrets.json)"
},

我正在运行我的用户流回复 url https://localhost:5001/signin-oidc.

我知道它以前在本地和生产环境中都可以工作，但我无法弄清楚从那以后可能会出现什么问题。我如何诊断此问题？

Answer 1

请检查以下见解是否有助于解决问题：

此异常 This site can’t be reached localhost refused to connect 通常发生在没有服务侦听您尝试连接的 IP/port 或尝试连接错误的 IP/port.[=19 时=]

尝试更改端口号
或者您甚至可以尝试用您的 IP 地址替换 localhost。

And also do ensure there's no firewall blocking the connection.and whatever port you change , make sure same is given in appregistration reply url.

"profiles": {
        " MyAppName": {
            "commandName": "Project",
            "launchBrowser": true,
            "applicationUrl": https://localhost:44316/;http://localhost:3110 ,
            "environmentVariables": {
                "ASPNETCORE_ENVIRONMENT": "Development"
            },
         
        }
    }

另请检查是否

You have started your server.

Your server is listening for connections or not.

Try deleting cookies for your localhost

Run Visual Studio as "Run as administrator"

You have Granted admin consent for open id and offline access permissions in portal.

在应用程序设置中查看实例是否必须类似于：

"Instance": https://yourb2cdomain.b2clogin.com/tfp/

最后，如果问题仍然存在，请尝试找到 .vs 文件夹和 Obj 文件夹并删除它们，然后再次运行。

参考文献：

如果您觉得 asp.net 应用程序配置有问题，您可以尝试在此处检查可能导致错误的问题 > asp.net mvc - localhost refused to connect Error in visual studio - Stack Overflow

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