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‎asp-net-core-filters.sln

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Microsoft Visual Studio Solution File, Format Version 12.00
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# Visual Studio Version 16
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VisualStudioVersion = 16.0.30803.129
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MinimumVisualStudioVersion = 10.0.40219.1
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "asp-net-core-filters", "asp-net-core-filters\asp-net-core-filters.csproj", "{0EAB1F5C-6249-4AE4-A206-4D40C32E96BD}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Release|Any CPU = Release|Any CPU
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EndGlobalSection
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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{0EAB1F5C-6249-4AE4-A206-4D40C32E96BD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{0EAB1F5C-6249-4AE4-A206-4D40C32E96BD}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{0EAB1F5C-6249-4AE4-A206-4D40C32E96BD}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{0EAB1F5C-6249-4AE4-A206-4D40C32E96BD}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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GlobalSection(ExtensibilityGlobals) = postSolution
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SolutionGuid = {16F2D505-87F4-4BDF-95B8-5900134B1712}
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EndGlobalSection
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EndGlobal

‎asp-net-core-filters/Controllers/HomeController.cs

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using asp_net_core_filters.Filters;
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using asp_net_core_filters.Models;
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using Microsoft.AspNetCore.Authorization;
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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.Extensions.Logging;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Security.Claims;
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using System.Threading.Tasks;
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namespace asp_net_core_filters.Controllers
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{
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public class HomeController : Controller
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{
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private readonly ILogger<HomeController> _logger;
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public HomeController(ILogger<HomeController> logger)
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{
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_logger = logger;
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}
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[ServiceFilter(typeof(AuthorizeIPAddress))]
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public IActionResult Index()
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{
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return View();
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}
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public IActionResult Privacy()
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{
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return View();
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}
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[ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
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public IActionResult Error()
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{
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return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
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}
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}
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}

‎asp-net-core-filters/Filters/AuthorizeIPAddress.cs

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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.AspNetCore.Mvc.Filters;
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using System.Net;
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namespace asp_net_core_filters.Filters
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{
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public class AuthorizeIPAddress : IAuthorizationFilter
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{
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private readonly string _allowedIPAddress;
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public AuthorizeIPAddress(string allowedIPAddress)
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{
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this._allowedIPAddress = allowedIPAddress;
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}
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public void OnAuthorization(AuthorizationFilterContext context)
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{
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var requestIp = context.HttpContext.Connection.RemoteIpAddress;
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var ipAddresses = this._allowedIPAddress.Split(';');
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var unauthorizedIp = true;
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if (requestIp.IsIPv4MappedToIPv6)
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{
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requestIp = requestIp.MapToIPv4();
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}
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foreach (var address in ipAddresses)
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{
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var testIp = IPAddress.Parse(address);
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if (testIp.Equals(requestIp))
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{
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unauthorizedIp = false;
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break;
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}
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}
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if (unauthorizedIp)
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{
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context.Result = new StatusCodeResult(StatusCodes.Status403Forbidden);
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return;
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}
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}
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}
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}

‎asp-net-core-filters/Filters/CacheResourceFilter.cs

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using Microsoft.AspNetCore.Mvc;
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using Microsoft.AspNetCore.Mvc.Filters;
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using System.Collections.Generic;
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namespace asp_net_core_filters.Filters
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{
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public class CacheResourceFilter : IResourceFilter
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{
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private static readonly Dictionary<string, object> _cache
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= new Dictionary<string, object>();
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private string _cacheKey;
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public void OnResourceExecuting(ResourceExecutingContext context)
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{
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_cacheKey = context.HttpContext.Request.Path.ToString();
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if (_cache.ContainsKey(_cacheKey))
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{
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var cachedValue = _cache[_cacheKey] as string;
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if (cachedValue != null)
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{
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context.Result = new ContentResult()
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{ Content = cachedValue };
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}
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}
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}
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public void OnResourceExecuted(ResourceExecutedContext context)
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{
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if (!string.IsNullOrEmpty(_cacheKey) && !_cache.ContainsKey(_cacheKey))
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{
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var result = context.Result as ContentResult;
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if (result != null)
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{
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_cache.Add(_cacheKey, result.Content);
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}
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}
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}
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}
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}

‎asp-net-core-filters/Models/ErrorViewModel.cs

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using System;
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namespace asp_net_core_filters.Models
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{
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public class ErrorViewModel
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{
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public string RequestId { get; set; }
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public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
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}
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}

‎asp-net-core-filters/Program.cs

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using Microsoft.AspNetCore.Hosting;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.Hosting;
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using Microsoft.Extensions.Logging;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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namespace asp_net_core_filters
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{
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public class Program
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{
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public static void Main(string[] args)
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{
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CreateHostBuilder(args).Build().Run();
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}
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public static IHostBuilder CreateHostBuilder(string[] args) =>
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Host.CreateDefaultBuilder(args)
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.ConfigureWebHostDefaults(webBuilder =>
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{
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webBuilder.UseStartup<Startup>();
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});
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}
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}

‎asp-net-core-filters/Properties/launchSettings.json

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{
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"iisSettings": {
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"windowsAuthentication": false,
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"anonymousAuthentication": true,
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"iisExpress": {
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"applicationUrl": "http://localhost:54001",
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"sslPort": 44370
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}
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},
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"profiles": {
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"IIS Express": {
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"commandName": "IISExpress",
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"launchBrowser": true,
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"environmentVariables": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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}
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},
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"asp_net_core_filters": {
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"commandName": "Project",
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"dotnetRunMessages": "true",
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"launchBrowser": true,
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"applicationUrl": "https://localhost:5001;http://localhost:5000",
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"environmentVariables": {
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"ASPNETCORE_ENVIRONMENT": "Development"
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}
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}
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}
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}

‎asp-net-core-filters/Startup.cs

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using asp_net_core_filters.Filters;
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using Microsoft.AspNetCore.Builder;
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using Microsoft.AspNetCore.Hosting;
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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.HttpsPolicy;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Hosting;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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namespace asp_net_core_filters
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{
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public class Startup
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{
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public Startup(IConfiguration configuration)
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{
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Configuration = configuration;
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}
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public IConfiguration Configuration { get; }
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// This method gets called by the runtime. Use this method to add services to the container.
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public void ConfigureServices(IServiceCollection services)
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{
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services.AddControllersWithViews();
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services.AddScoped<AuthorizeIPAddress>(container =>
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{
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//test for valid authorization
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//return new AuthorizeIPAddress("127.0.0.1;192.168.1.5;::1");
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//test for invalid authorization
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return new AuthorizeIPAddress("000.0.0.0");
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});
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}
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// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
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public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
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{
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if (env.IsDevelopment())
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{
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app.UseDeveloperExceptionPage();
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}
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else
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{
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app.UseExceptionHandler("/Home/Error");
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// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
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app.UseHsts();
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}
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app.UseHttpsRedirection();
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app.UseStaticFiles();
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app.UseRouting();
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app.UseAuthorization();
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app.UseEndpoints(endpoints =>
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{
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endpoints.MapControllerRoute(
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name: "default",
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pattern: "{controller=Home}/{action=Index}/{id?}");
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});
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}
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}
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}

‎asp-net-core-filters/Views/Home/Index.cshtml

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@{
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ViewData["Title"] = "Home Page";
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}
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<div class="text-center">
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<h1 class="display-4">Welcome</h1>
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<p>Learn about <a href="https://docs.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>
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</div>

‎asp-net-core-filters/Views/Home/Privacy.cshtml

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@{
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ViewData["Title"] = "Privacy Policy";
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}
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<h1>@ViewData["Title"]</h1>
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<p>Use this page to detail your site's privacy policy.</p>

‎asp-net-core-filters/Views/Shared/Error.cshtml

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@model ErrorViewModel
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@{
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ViewData["Title"] = "Error";
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}
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<h1 class="text-danger">Error.</h1>
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<h2 class="text-danger">An error occurred while processing your request.</h2>
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@if (Model.ShowRequestId)
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{
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<p>
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<strong>Request ID:</strong> <code>@Model.RequestId</code>
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</p>
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}
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<h3>Development Mode</h3>
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<p>
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Swapping to <strong>Development</strong> environment will display more detailed information about the error that occurred.
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</p>
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<p>
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<strong>The Development environment shouldn't be enabled for deployed applications.</strong>
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It can result in displaying sensitive information from exceptions to end users.
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For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
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and restarting the app.
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</p>

‎asp-net-core-filters/Views/Shared/_Layout.cshtml

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>@ViewData["Title"] - asp_net_core_filters</title>
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<link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.min.css" />
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<link rel="stylesheet" href="~/css/site.css" />
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</head>
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<body>
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<header>
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<nav class="navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3">
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<div class="container">
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<a class="navbar-brand" asp-area="" asp-controller="Home" asp-action="Index">asp_net_core_filters</a>
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<button class="navbar-toggler" type="button" data-toggle="collapse" data-target=".navbar-collapse" aria-controls="navbarSupportedContent"
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aria-expanded="false" aria-label="Toggle navigation">
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<span class="navbar-toggler-icon"></span>
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</button>
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<div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
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<ul class="navbar-nav flex-grow-1">
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<li class="nav-item">
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<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Index">Home</a>
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</li>
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<li class="nav-item">
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<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
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</li>
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</ul>
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</div>
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</div>
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</nav>
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</header>
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<div class="container">
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<main role="main" class="pb-3">
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@RenderBody()
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</main>
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</div>
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<footer class="border-top footer text-muted">
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<div class="container">
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&copy; 2021 - asp_net_core_filters - <a asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
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</div>
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</footer>
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<script src="~/lib/jquery/dist/jquery.min.js"></script>
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<script src="~/lib/bootstrap/dist/js/bootstrap.bundle.min.js"></script>
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<script src="~/js/site.js" asp-append-version="true"></script>
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@await RenderSectionAsync("Scripts", required: false)
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</body>
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</html>

‎asp-net-core-filters/Views/Shared/_ValidationScriptsPartial.cshtml

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<script src="~/lib/jquery-validation/dist/jquery.validate.min.js"></script>
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<script src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.min.js"></script>

‎asp-net-core-filters/Views/_ViewImports.cshtml

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@using asp_net_core_filters
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@using asp_net_core_filters.Models
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@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

‎asp-net-core-filters/Views/_ViewStart.cshtml

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@{
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Layout = "_Layout";
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}

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