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Implemented Sitemap

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Mia Rose Winter 2024-02-06 22:11:00 +01:00
parent 89ba5812bf
commit 0e24c6daf3
Signed by: miawinter
GPG key ID: 4B6F6A83178F595E
1 changed files with 70 additions and 0 deletions
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Wave/Controllers/SitemapController.cs Normal file
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using System.Text;
using System.Xml;
using System.Xml.Linq;
using Humanizer;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.OutputCaching;
using Microsoft.EntityFrameworkCore;
using Wave.Data;
using static StackExchange.Redis.Role;
namespace Wave.Controllers;
[ApiController]
public class SitemapController(ApplicationDbContext context) : ControllerBase {
private ApplicationDbContext Context { get; } = context;
[HttpGet("/sitemap.xml")]
[Produces("application/xml")]
[ResponseCache(Duration = 60*15, Location = ResponseCacheLocation.Any)]
[OutputCache(Duration = 60*15)]
public async Task GetSitemapAsync(CancellationToken cancellation) {
var host = new Uri($"https://{Request.Host}{Request.PathBase}", UriKind.Absolute);
var articles = await Context.Set<Article>().OrderBy(a => a.PublishDate).ToListAsync();
var document = new XDocument(new XElement("urlset")) {
Declaration = new XDeclaration("1.0", Encoding.UTF8.ToString(), null),
};
if (articles.Count > 0) {
document.Root.Add(CreateUrlElement(host, articles.Max(a => a.PublishDate).UtcDateTime, priority:1f));
foreach (var article in articles) {
document.Root.Add(CreateUrlElement(new Uri(host,
$"/{article.PublishDate.Year}/{article.PublishDate.Month:D2}/{article.PublishDate.Day:D2}/{Uri.EscapeDataString(article.Title.ToLowerInvariant()).Replace("-", "+").Replace("%20", "-")}"), article.LastModified?.UtcDateTime ?? article.PublishDate.UtcDateTime));
}
} else {
document.Root.Add(CreateUrlElement(host, priority:1f));
}
Response.StatusCode = StatusCodes.Status200OK;
Response.ContentType = "application/xml; charset=utf-8";
await using var writer = XmlWriter.Create(Response.Body, new XmlWriterSettings {
Encoding = Encoding.UTF8,
Async = true
});
await document.SaveAsync(writer, cancellation);
await writer.FlushAsync();
}
private static XElement CreateUrlElement(Uri location, DateTime? lastModified = null, ChangeFrequencies changeFrequency = ChangeFrequencies.Unknown, float priority = 0.5f) {
var result = new XElement("url", new XElement("loc", location.AbsoluteUri));
if (lastModified is not null) result.Add(new XElement("lastmod", lastModified.Value.ToString("yyyy-MM-dd")));
if (changeFrequency is not ChangeFrequencies.Unknown) result.Add(new XElement("changefreq", changeFrequency.ToString().ToLower()));
if (Math.Abs(priority - 0.5f) > 0.05) result.Add(new XElement("priority", priority.ToString("F1")));
return result;
}
private enum ChangeFrequencies {
Unknown,
Never,
Always,
Hourly,
Daily,
Weekly,
Monthly,
Yearly
}
}