Implemented API to get security bulletins

Controllers/SecurityController.cs

@@ -0,0 +1,51 @@
+// MIT License
+// Copyright DNN Community
+
+using Dnn.Modules.SecurityCenter.Services;
+using DotNetNuke.Web.Api;
+using System;
+using System.Threading.Tasks;
+using System.Web;
+using System.Web.Http;
+
+namespace Dnn.Modules.SecurityCenter.Controllers
+{
+    /// <summary>
+    /// Provides information about DNN security services.
+    /// </summary>
+    public class SecurityController : ModuleApiController
+    {
+        private readonly ISecurityService securityService;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SecurityController"/> class.
+        /// </summary>
+        /// <param name="securityService">Provides access to DNN security bulletins service.</param>
+        public SecurityController(ISecurityService securityService)
+        {
+            this.securityService = securityService;
+        }
+
+        /// <summary>
+        /// Gets all the DNN security bulletins.
+        /// </summary>
+        /// <param name="versionString">The version for which to get the security bulletins for in the format 090202 for v9.9.2.</param>
+        /// <returns>A list of DNN security bulletins.</returns>
+        [ValidateAntiForgeryToken]
+        [HttpGet]
+        [DnnModuleAuthorize(AccessLevel = DotNetNuke.Security.SecurityAccessLevel.View)]
+        public async Task<IHttpActionResult> GetSecurityBulletins(string versionString)
+        {
+            try
+            {
+                var viewModel = await this.securityService.GetAllSecurityBulletinsAsync(versionString);
+                return this.Ok(viewModel);
+            }
+            catch (HttpException)
+            {
+                return this.InternalServerError(new Exception("The update service is currently not available."));
+                throw;
+            }
+        }
+    }
+}

Module.csproj

@@ -44,6 +44,7 @@
     <Reference Include="System.ComponentModel.DataAnnotations" />
     <Reference Include="System.Core" />
     <Reference Include="System.Net.Http" />
+    <Reference Include="System.ServiceModel" />
     <Reference Include="System.Web" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Data.DataSetExtensions" />
@@ -55,6 +56,7 @@
     <Compile Include="Common\Globals.cs" />
     <Compile Include="Common\Extensions\IQueryableExtensions.cs" />
     <Compile Include="Controllers\LocalizationController.cs" />
+    <Compile Include="Controllers\SecurityController.cs" />
     <Compile Include="DTO\GetItemsPageDTO.cs" />
     <Compile Include="Controllers\ValidateModelAttribute.cs" />
     <Compile Include="Data\Entities\BaseEntity.cs" />
@@ -72,15 +74,18 @@
     <Compile Include="Controllers\ModuleExceptionFilterAttribute.cs" />
     <Compile Include="Controllers\ServiceRouteMapper.cs" />
     <Compile Include="Services\ILoggingService.cs" />
+    <Compile Include="Services\ISecurityService.cs" />
     <Compile Include="Services\LoggingService.cs" />
     <Compile Include="Services\IItemService.cs" />
     <Compile Include="Services\ILocalizationService.cs" />
     <Compile Include="Services\ItemService.cs" />
     <Compile Include="Services\LocalizationService.cs" />
+    <Compile Include="Services\SecurityService.cs" />
     <Compile Include="Startup.cs" />
     <Compile Include="ViewModels\ItemsPageViewModel.cs" />
     <Compile Include="ViewModels\ItemViewModel.cs" />
     <Compile Include="ViewModels\LocalizationViewModel.cs" />
+    <Compile Include="ViewModels\SecurityBulletinsViewModel.cs" />
     <Resource Include=".gitignore" />
     <Resource Include="resources\images\module-icon.png" />
     <Resource Include="resources\views\view.html" />

Services/ISecurityService.cs

@@ -0,0 +1,21 @@
+// MIT License
+// Copyright DNN Community
+
+using Dnn.Modules.SecurityCenter.ViewModels;
+using System.Threading.Tasks;
+
+namespace Dnn.Modules.SecurityCenter.Services
+{
+    /// <summary>
+    /// Provides access to the DNN security service at dnnplatform.io.
+    /// </summary>
+    public interface ISecurityService
+    {
+        /// <summary>
+        /// Gets a list of all security bulletins that apply for a given version.
+        /// </summary>
+        /// <param name="versionString">A string representation of a DNN version in the format 090202 for v9.2.2.</param>
+        /// <returns><see cref="SecurityBulletinsViewModel"/>.</returns>
+        Task<SecurityBulletinsViewModel> GetAllSecurityBulletinsAsync(string versionString);
+    }
+}

Services/SecurityService.cs

@@ -0,0 +1,53 @@
+// MIT License
+// Copyright DNN Community
+
+using Dnn.Modules.SecurityCenter.ViewModels;
+using DotNetNuke.Common.Utilities;
+using System;
+using System.Linq;
+using System.ServiceModel.Syndication;
+using System.Threading.Tasks;
+using System.Xml;
+
+namespace Dnn.Modules.SecurityCenter.Services
+{
+    /// <summary>
+    /// Provides access to the DNN security service at dnnplatform.io.
+    /// </summary>
+    internal class SecurityService : ISecurityService
+    {
+        /// <inheritdoc/>
+        public async Task<SecurityBulletinsViewModel> GetAllSecurityBulletinsAsync(string versionString)
+        {
+            return await Task.Run(() =>
+            {
+                var cacheKey = "Dnn.Security_SecurityBelletinsViewModel";
+                var cached = DataCache.GetCache<SecurityBulletinsViewModel>(cacheKey);
+                if (cached is null)
+                {
+                    XmlReader reader = XmlReader.Create($"https://dnnplatform.io/security.aspx?type=Framework&name=DNNCorp.CE&version={versionString}");
+                    var feed = SyndicationFeed.Load(reader);
+
+                    var viewModel = new SecurityBulletinsViewModel
+                    {
+                        Bulletins = feed.Items.Select(item => new SecurityBulletinsViewModel.Bulletin
+                        {
+                            Description = item.Summary.Text,
+                            Link = item.Links.FirstOrDefault().Uri.ToString(),
+                            PublicationDateUtc = item.PublishDate.UtcDateTime,
+                            Title = item.Title.Text,
+                        }),
+                        Description = feed.Description.Text,
+                        Link = feed.Links.FirstOrDefault().Uri.ToString(),
+                        Title = feed.Title.Text,
+                    };
+
+                    DataCache.SetCache(cacheKey, viewModel, DateTime.Now.AddHours(1));
+                    return viewModel;
+                }
+
+                return cached;
+            });
+        }
+    }
+}

Startup.cs

@@ -29,6 +29,7 @@ public void ConfigureServices(IServiceCollection services)
             services.AddScoped<IItemService>(provider => new ItemService(provider.GetService<IRepository<Item>>()));
             services.AddScoped<ILoggingService, LoggingService>();
             services.AddScoped<ILocalizationService, LocalizationService>();
+            services.AddSingleton<ISecurityService, SecurityService>();
         }
     }
 }

ViewModels/SecurityBulletinsViewModel.cs

@@ -0,0 +1,60 @@
+// MIT License
+// Copyright DNN Community
+
+using System;
+using System.Collections.Generic;
+
+namespace Dnn.Modules.SecurityCenter.ViewModels
+{
+    /// <summary>
+    /// A viewmodel that represents DNN Security Bulletins.
+    /// </summary>
+    public class SecurityBulletinsViewModel
+    {
+        /// <summary>
+        /// Gets or sets the title of the RSS feed.
+        /// </summary>
+        public string Title { get; set; }
+
+        /// <summary>
+        /// Gets or sets the url to download DNN Platform.
+        /// </summary>
+        public string Link { get; set; }
+
+        /// <summary>
+        /// Gets or sets the RSS feed description.
+        /// </summary>
+        public string Description { get; set; }
+
+        /// <summary>
+        /// Gets or sets the list of security bulletins.
+        /// </summary>
+        public IEnumerable<Bulletin> Bulletins { get; set; }
+
+        /// <summary>
+        /// Represents a single DNN Security Bulletin.
+        /// </summary>
+        public class Bulletin
+        {
+            /// <summary>
+            /// Gets or sets a link to the detailed security bulletin.
+            /// </summary>
+            public string Link { get; set; }
+
+            /// <summary>
+            /// Gets or sets the title of the bulletin.
+            /// </summary>
+            public string Title { get; set; }
+
+            /// <summary>
+            /// Gets or sets the short description of the bulletin.
+            /// </summary>
+            public string Description { get; set; }
+
+            /// <summary>
+            /// Gets or sets a string representing the date of announcement.
+            /// </summary>
+            public DateTime PublicationDateUtc { get; set; }
+        }
+    }
+}