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Yes.Application/Blogs/GetRssQueryHandler.cs

@@ -0,0 +1,89 @@
+
+namespace Yes.Application.Blogs
+{
+
+    public record GetRssQuery() : IRequest<GetRssQueryResponse>;
+
+    public record GetRssQueryResponse(string Xml);
+
+    public class GetRssQueryHandler(
+        IOptionsMonitor<BlogSettings> options,
+        BlogDbContext db,
+        IMapper mapper) : IRequestHandler<GetRssQuery, GetRssQueryResponse>
+    {
+        private readonly BlogSettings _settings = options.CurrentValue;
+        private readonly BlogDbContext _db = db;
+        public async Task<GetRssQueryResponse> Handle(GetRssQuery request, CancellationToken cancellationToken)
+        {
+            var queryArticle = _db.Articles.Where(x => x.Type == ArticleTypeEnum.Article && x.Status == ArticleStatusEnum.Normal).AsQueryable();
+            var pubDate = queryArticle.Any() ? _db.Articles.Min(x => x.PublishDate) : DateTime.MinValue;
+
+            var channel = new Channel
+            {
+                Title = _settings.Name,
+                Link = _settings.Url,
+                Description = _settings.Description,
+                Language = "zh-CN",
+                FeedUrl = $"{_settings.Url}/feed/",
+                PubDate = pubDate
+            };
+
+            // 添加扩展元素（示例）
+            channel.Extensions.Add(new XElement("generator", _settings.Name));
+            channel.Extensions.Add(new XElement("docs", "http://www.rssboard.org/rss-specification"));
+
+            var query = from article in queryArticle
+                        join categoryTemp in _db.Categories.AsNoTracking() on article.CategoryId equals categoryTemp.Id into tempCategory
+                        from category in tempCategory.DefaultIfEmpty()
+                        join userTemp in _db.Users.AsNoTracking() on article.UserId equals userTemp.Id into tempUser
+                        from user in tempUser.DefaultIfEmpty()
+                        orderby article.Id descending
+                        select new ArticleModel
+                        {
+                            Id = article.Id,
+                            CanComment = article.CanComment,
+                            CommentCount = article.CommentCount,
+                            CategoryId = article.CategoryId,
+                            ModifyDate = article.ModifyDate.ToSafeTime(),
+                            PublishDate = article.PublishDate.ToSafeTime(),
+                            CreateDate = article.CreateDate.ToSafeTime(),
+                            Content = article.Content,
+                            CoverUrl = article.CoverUrl,
+                            Slug = article.Slug,
+                            ReadCount = article.ReadCount,
+                            Title = article.Title,
+                            Summary = article.Summary,
+                            UserId = article.UserId,
+                            Category = new CategoryModel
+                            {
+                                CoverUrl = category.CoverUrl,
+                                Description = category.Description,
+                                Id = category.Id,
+                                Name = category.Name,
+                                Slug = category.Slug
+                            }
+                        };
+
+            var items = query.Select(x => new Item
+            {
+                Content = x.Content,
+                Title = x.Title,
+                Url = _settings.ArticleRoute.ToRoute(x.Category, x),
+                Description = x.Summary,
+                CommentsCount = x.CommentCount,
+                Creator = x.UserId.ToString(),
+                PublishDate = x.PublishDate,
+                CommentsUrl = $"{_settings.ArticleRoute.ToRoute(x.Category, x)}#comments", 
+                CommentRssUrl = $"{_settings.Url}/feed/"
+            });
+
+
+            var generator = new RssGenerator();
+            string xml = generator.GenerateRss(channel, items);
+
+            return new GetRssQueryResponse(xml);
+        }
+
+
+    }
+}

Yes.Application/GlobalUsings.cs

@@ -38,3 +38,5 @@ global using System.IdentityModel.Tokens.Jwt;
 global using Microsoft.IdentityModel.Tokens;
 global using System.Text;
 global using Yes.Infrastructure.Authorizations.Identity.Authroizations;
+global using System.Xml.Linq;
+global using Yes.Infrastructure.Rss;

Yes.Blog/Endpoints/Blogs/RssEndpoint.cs

@@ -0,0 +1,19 @@
+
+namespace Yes.Blog.Endpoints.Blogs
+{
+    public class RssEndpoint : BlogEndpointScheme, IEndpoint
+    {
+        public void Map(IEndpointRouteBuilder app) => app.MapGet("feed", Handle).AllowAnonymous();
+
+        private async Task<Microsoft.AspNetCore.Http.IResult> Handle(
+            IMediator mediator,
+            IMapper mapper,
+            CancellationToken cancellationToken)
+        {
+            var response = await mediator.Send(new GetRssQuery(), cancellationToken);
+
+            return Results.Text(response.Xml, "application/rss+xml; charset=utf-8");
+        }
+
+    }
+}

Yes.Infrastructure/GlobalUsings.cs

@@ -52,3 +52,4 @@ global using System.Security;
 global using System.Security.Cryptography;
 global using Yes.Infrastructure.Helpers;
 global using Microsoft.AspNetCore.Authentication.JwtBearer;
+global using System.Xml.Linq;

Yes.Infrastructure/Rss/Channel.cs

@@ -0,0 +1,21 @@
+namespace Yes.Infrastructure.Rss
+{
+    public class Channel
+    {
+        public string Title { get; set; }
+        public string Link { get; set; }
+        public string Description { get; set; }
+        public string Language { get; set; } = "zh-CN";
+
+        // 时间信息
+        public DateTime LastBuildDate { get; set; } = DateTime.Now;
+        public DateTime PubDate { get; set; } = DateTime.Now;
+
+        // Atom 链接
+        public string FeedUrl { get; set; }
+
+        // 扩展能力
+        public List<XElement> Extensions { get; } = new List<XElement>();
+
+    }
+}

Yes.Infrastructure/Rss/Item.cs

@@ -0,0 +1,15 @@
+namespace Yes.Infrastructure.Rss
+{
+    public class Item
+    {
+        public string Title { get; set; }
+        public string Url { get; set; }
+        public DateTime PublishDate { get; set; }
+        public string Creator { get; set; }
+        public string Description { get; set; }  // 简短描述
+        public string Content { get; set; }       // 完整HTML内容
+        public int CommentsCount { get; set; }
+        public string CommentsUrl { get; set; }
+        public string CommentRssUrl { get; set; }
+    }
+}

Yes.Infrastructure/Rss/RssGenerator.cs

@@ -0,0 +1,80 @@
+
+namespace Yes.Infrastructure.Rss
+{
+    public class RssGenerator
+    {    
+
+        private readonly XNamespace _contentNs = XNamespace.Get("http://purl.org/rss/1.0/modules/content/");
+        private readonly XNamespace _dcNs = XNamespace.Get("http://purl.org/dc/elements/1.1/");
+        private readonly XNamespace _slashNs = XNamespace.Get("http://purl.org/rss/1.0/modules/slash/");
+        private readonly XNamespace _wfwNs = XNamespace.Get("http://wellformedweb.org/CommentAPI/");
+
+        public string GenerateRss(Channel channel, IEnumerable<Item> items)
+        {
+            var doc = new XDocument(
+                new XDeclaration("1.0", "UTF-8", null),
+                new XElement("rss",
+                    new XAttribute("version", "2.0"),
+                    GetNamespaceAttributes(),
+                    new XElement("channel",
+                        RequiredChannelElements(channel),
+                        GenerateItems(items)
+                    )
+                )
+            );
+
+            return doc.ToStringWithDeclaration();
+        }
+
+
+        private IEnumerable<XAttribute> GetNamespaceAttributes()
+        {
+            yield return new XAttribute(XNamespace.Xmlns + "content", "http://purl.org/rss/1.0/modules/content/");
+            yield return new XAttribute(XNamespace.Xmlns + "dc", "http://purl.org/dc/elements/1.1/");
+            yield return new XAttribute(XNamespace.Xmlns + "atom", "http://www.w3.org/2005/Atom");
+            yield return new XAttribute(XNamespace.Xmlns + "wfw", "http://wellformedweb.org/CommentAPI/");
+            yield return new XAttribute(XNamespace.Xmlns + "slash", "http://purl.org/rss/1.0/modules/slash/");
+        }
+
+        private IEnumerable<XElement> RequiredChannelElements(Channel channel)
+        {
+            yield return new XElement("title", channel.Title);
+            yield return new XElement("link", channel.Link);
+            yield return new XElement("description", channel.Description);
+            yield return new XElement("language", channel.Language);
+            yield return new XElement("lastBuildDate", FormatRfc1123(channel.LastBuildDate));
+            yield return new XElement("pubDate", FormatRfc1123(channel.PubDate));
+            yield return new XElement(XNamespace.Get("http://www.w3.org/2005/Atom") + "link",
+                new XAttribute("href", channel.FeedUrl),
+                new XAttribute("rel", "self"),
+                new XAttribute("type", "application/rss+xml"));
+        }
+
+        private static string FormatRfc1123(DateTimeOffset date)
+        {
+            return date.ToString("r", System.Globalization.CultureInfo.InvariantCulture);
+        }
+
+        private IEnumerable<XElement> GenerateItems(IEnumerable<Item> items)
+        {
+            foreach (var item in items)
+            {
+                yield return new XElement("item",
+                    new XElement("title", item.Title),
+                    new XElement("link", item.Url),
+                    new XElement("guid", new XAttribute("isPermaLink", "true"), item.Url),
+                    new XElement("pubDate", item.PublishDate.ToString("ddd, dd MMM yyyy HH:mm:ss zzz")),
+                    new XElement(_dcNs + "creator", item.Creator),
+                    new XElement("description",
+                        new XCData(item.Description)),
+                    new XElement(_contentNs + "encoded",
+                        new XAttribute(XNamespace.Xml + "lang", "zh-CN"),
+                        new XCData(item.Content)),
+                    new XElement(_slashNs + "comments", item.CommentsCount),
+                    new XElement("comments", item.CommentsUrl),
+                    new XElement(_wfwNs + "commentRss", item.CommentRssUrl)
+                );
+            }
+        }
+    }
+}

Yes.Infrastructure/Rss/XDocumentExtensions.cs

@@ -0,0 +1,15 @@
+namespace Yes.Infrastructure.Rss
+{
+    public static class XDocumentExtensions
+    {
+        public static string ToStringWithDeclaration(this XDocument doc)
+        {
+            if (doc.Declaration == null)
+                return doc.ToString();
+
+            using var writer = new StringWriter();
+            doc.Save(writer);
+            return writer.ToString();
+        }
+    }
+}