private async Task addChannelIdentityAsync(RssFeedWriter rssFeedWriter)
{
await rssFeedWriter.WriteDescription(_feedChannel.FeedDescription.ApplyRle().RemoveHexadecimalSymbols());
await rssFeedWriter.WriteCopyright(_feedChannel.FeedCopyright.ApplyRle().RemoveHexadecimalSymbols());
await rssFeedWriter.WriteTitle(_feedChannel.FeedTitle.ApplyRle().RemoveHexadecimalSymbols());
await rssFeedWriter.WriteLanguage(new CultureInfo(_feedChannel.CultureName));
await rssFeedWriter.WriteRaw($"<atom:link href=\"{_httpContextInfo.GetRawUrl()}\" rel=\"self\" type=\"application/rss+xml\" />");
await rssFeedWriter.Write(new SyndicationLink(_httpContextInfo.GetBaseUri(), relationshipType : RssElementNames.Link));
}
public async Task <ActionResult> Feed()
{
var entries = await this.unitOfWork.BlogEntries
.Include(b => b.Author)
.Include(b => b.Tags)
.ThenInclude(t => t.Tag)
.AsNoTracking()
.Where(b => b.Visible && b.PublishDate <= DateTimeOffset.UtcNow)
.OrderByDescending(b => b.PublishDate)
.ToListAsync();
string baseUrl = $"{this.Request.Scheme}://{this.Request.Host}{this.Request.PathBase}";
using (var sw = new StringWriterWithEncoding(Encoding.UTF8))
{
using (XmlWriter xmlWriter = XmlWriter.Create(sw, new XmlWriterSettings()
{
Async = true, Indent = true
}))
{
var writer = new RssFeedWriter(xmlWriter);
await writer.WriteTitle(this.blogSettings.BlogName);
await writer.WriteDescription(this.blogSettings.BlogDescription);
await writer.Write(new SyndicationLink(new Uri(baseUrl)));
await writer.WriteRaw($"<atom:link href=\"{baseUrl}/Blog/{nameof(this.Feed)}\" rel=\"self\" type=\"application/rss+xml\" xmlns:atom=\"http://www.w3.org/2005/Atom\" />");
await writer.Write(new SyndicationImage(new Uri($"{baseUrl}/apple-touch-icon_192.png"))
{
Title = this.blogSettings.BlogName,
Description = this.blogSettings.BlogDescription,
Link = new SyndicationLink(new Uri(baseUrl))
});
if (entries.Count > 0)
{
await writer.WritePubDate(entries[0].PublishDate);
}
var pipeline = new MarkdownPipelineBuilder()
.UseAdvancedExtensions()
.Build();
foreach (var blogEntry in entries)
{
var syndicationItem = new SyndicationItem()
{
Id = blogEntry.Id.ToString(),
Title = blogEntry.Header,
Published = blogEntry.PublishDate,
LastUpdated = blogEntry.PublishDate > blogEntry.UpdateDate ? blogEntry.PublishDate : blogEntry.UpdateDate,
Description = $"{Markdown.ToHtml(blogEntry.ShortContent, pipeline)}{Markdown.ToHtml(blogEntry.Content, pipeline)}"
};
syndicationItem.AddLink(new SyndicationLink(new Uri($"{baseUrl}/Blog/{blogEntry.Url}")));
syndicationItem.AddContributor(new SyndicationPerson(blogEntry.Author.UserName, blogEntry.Author.Email));
foreach (var tag in blogEntry.Tags)
{
syndicationItem.AddCategory(new SyndicationCategory(tag.Tag.Name));
}
await writer.Write(syndicationItem);
}
xmlWriter.Flush();
}
return(this.Content(sw.ToString(), "application/rss+xml"));
}
}
