public async Task <RssChannel> GetChannel(CancellationToken cancellationToken = default(CancellationToken))
{
var project = await projectService.GetCurrentProjectSettings();
if (project == null)
{
return(null);
}
var posts = await blogService.GetRecentPosts(maxFeedItems);
if (posts == null)
{
return(null);
}
var channel = new RssChannel();
channel.Title = project.Title;
if (!string.IsNullOrEmpty(project.Description))
{
channel.Description = project.Description;
}
else
{
// prevent error, channel desc cannot be empty
channel.Description = "Welcome to my blog";
}
channel.Copyright = project.CopyrightNotice;
if (!string.IsNullOrEmpty(project.ChannelCategoriesCsv))
{
var channelCats = project.ChannelCategoriesCsv.Split(',');
foreach (var cat in channelCats)
{
channel.Categories.Add(new RssCategory(cat));
}
}
channel.Generator = Name;
channel.RemoteFeedUrl = project.RemoteFeedUrl;
channel.RemoteFeedProcessorUseAgentFragment = project.RemoteFeedProcessorUseAgentFragment;
var urlHelper = urlHelperFactory.GetUrlHelper(actionContextAccesor.ActionContext);
if (project.Image.Length > 0)
{
channel.Image.Url = new Uri(urlHelper.Content(project.Image));
}
if (project.LanguageCode.Length > 0)
{
channel.Language = new CultureInfo(project.LanguageCode);
}
var baseUrl = string.Concat(
contextAccessor.HttpContext.Request.Scheme,
"://",
contextAccessor.HttpContext.Request.Host.ToUriComponent()
);
// asp.net bug? the comments for this method say it returns an absolute fully qualified url but it returns relative
// looking at latest code seems ok so maybe just a bug in rc1
//https://github.com/aspnet/Mvc/blob/dev/src/Microsoft.AspNetCore.Mvc.Core/UrlHelperExtensions.cs
//https://github.com/aspnet/Mvc/blob/dev/src/Microsoft.AspNetCore.Mvc.Core/Routing/UrlHelper.cs
var indexUrl = urlHelper.RouteUrl(ProjectConstants.BlogIndexRouteName);
if (indexUrl.StartsWith("/"))
{
indexUrl = string.Concat(baseUrl, indexUrl);
}
channel.Link = new Uri(indexUrl);
if (project.ManagingEditorEmail.Length > 0)
{
channel.ManagingEditor = project.ManagingEditorEmail;
}
if (project.ChannelRating.Length > 0)
{
channel.Rating = project.ChannelRating;
}
var feedUrl = string.Concat(
contextAccessor.HttpContext.Request.Scheme,
"://",
contextAccessor.HttpContext.Request.Host.ToUriComponent(),
contextAccessor.HttpContext.Request.PathBase.ToUriComponent(),
contextAccessor.HttpContext.Request.Path.ToUriComponent(),
contextAccessor.HttpContext.Request.QueryString.ToUriComponent());
channel.SelfLink = new Uri(feedUrl);
//channel.TextInput =
channel.TimeToLive = project.ChannelTimeToLive;
if (project.WebmasterEmail.Length > 0)
{
channel.Webmaster = project.WebmasterEmail;
}
DateTime mostRecentPubDate = DateTime.MinValue;
var items = new List <RssItem>();
foreach (var post in posts)
{
if (post.PubDate > mostRecentPubDate)
{
mostRecentPubDate = post.PubDate;
}
var rssItem = new RssItem();
rssItem.Author = post.Author;
if (post.Categories.Count > 0)
{
foreach (var c in post.Categories)
{
rssItem.Categories.Add(new RssCategory(c));
}
}
//rssItem.Comments
if (project.UseMetaDescriptionInFeed)
{
rssItem.Description = post.MetaDescription;
}
else
{
// change relative urls in content to absolute
rssItem.Description = htmlProcessor.ConvertUrlsToAbsolute(baseUrl, post.Content);
}
//rssItem.Enclosures
var postUrl = await blogService.ResolvePostUrl(post);
if (string.IsNullOrEmpty(postUrl))
{
//TODO: log
continue;
}
if (postUrl.StartsWith("/"))
{
//postUrl = urlHelper.Content(postUrl);
postUrl = string.Concat(
contextAccessor.HttpContext.Request.Scheme,
"://",
contextAccessor.HttpContext.Request.Host.ToUriComponent(),
postUrl);
}
rssItem.Guid = new RssGuid(postUrl, true);
rssItem.Link = new Uri(postUrl);
rssItem.PublicationDate = post.PubDate;
//rssItem.Source
rssItem.Title = post.Title;
items.Add(rssItem);
}
channel.PublicationDate = mostRecentPubDate;
channel.Items = items;
return(channel);
}
