public async Task <IActionResult> SeminarRss([FromServices] ISeminarService seminarService, int id)
{
if (CommonHelper.SystemSettings.GetOrAdd("EnableRss", "true") != "true")
{
throw new NotFoundException("不允许订阅");
}
var time = DateTime.Today.AddDays(-1);
string scheme = Request.Scheme;
var host = Request.Host;
var seminar = await seminarService.GetByIdAsync(id) ?? throw new NotFoundException("专题未找到");
using var raw = PostService.GetQuery(PostBaseWhere().And(p => p.Rss && p.Seminar.Any(s => s.Id == id) && p.Status == Status.Published && p.ModifyDate >= time), p => p.ModifyDate, false).Include(p => p.Category).AsNoTracking().Cacheable().ToPooledList();
var data = await raw.SelectAsync(async p =>
{
var summary = await p.Content.GetSummary(300, 50);
return(new Item()
{
Author = new Author
{
Name = p.Modifier
},
Body = summary,
Categories = new List <string>
{
p.Category.Name
},
Link = new Uri(scheme + "://" + host + "/" + p.Id),
PublishDate = p.ModifyDate.ToTimeZone(HttpContext.Session.Get <string>(SessionKey.TimeZone)),
Title = p.Title,
Permalink = scheme + "://" + host + "/" + p.Id,
Guid = p.Id.ToString(),
FullHtmlContent = summary
});
});
var posts = data.ToList();
InsertAdvertisement(posts, id, seminar.Title);
var feed = new Feed()
{
Title = Request.Host + $":专题{seminar.Title}文章订阅",
Description = seminar.Description,
Link = new Uri(scheme + "://" + host + "/rss"),
Copyright = CommonHelper.SystemSettings["Title"],
Language = "zh-cn",
Items = posts
};
var rss = feed.Serialize(new SerializeOption()
{
Encoding = Encoding.UTF8
});
return(Content(rss, ContentType.Xml));
}