Serving dynamic XML file from .NET Core Web Application - asp.net-core

Question

In my .NET Core 2.2 website, I have a controller method within my BlogController that generates a sitemap.xml file:
public ActionResult SiteMap()
{
// logic here
return Content("<sitemap>...</sitemap>", "text/xml");
}
I have this route set up so that the sitemap will be output at https://mysite/sitemap
routes.MapRoute(
name: "sitemap",
template: "sitemap",
defaults: new { controller = "Blog", action = "SiteMap" });
That works, in that accessing /sitemap results in the XML content being served up.
However, when I access https://mysite/sitemap.xml, I get a 404 error.
I'm pretty sure this is something to do with static file handling, but I'm not sure how to set it up so that /sitemap.xml works.

Answer 1

You could try to dynamtically build xml like this
[Route("/sitemap.xml")]
public void SitemapXml()
{
string host = Request.Scheme + "://" + Request.Host;
Response.ContentType = "application/xml";
using (var xml = XmlWriter.Create(Response.Body, new XmlWriterSettings { Indent = true }))
{
xml.WriteStartDocument();
xml.WriteStartElement("urlset", "http://www.sitemaps.org/schemas/sitemap/0.9");
xml.WriteStartElement("url");
xml.WriteElementString("loc", host);
xml.WriteElementString("changefreq", "daily");
xml.WriteElementString("lastmod", DateTime.Now.ToString("yyyy-MM-dd"));
xml.WriteEndElement();
var categories = _categoryService.GetAllCategories(inclTopMenu: true);
foreach (var c in categories)
BuildXml(xml, c.GetSeName(), host);
xml.WriteEndElement();
}
}
private void BuildXml(XmlWriter xml, string url, string host)
{
xml.WriteStartElement("url");
xml.WriteElementString("loc", host + "/" + url);
xml.WriteElementString("changefreq", "weekly");
xml.WriteElementString("lastmod", DateTime.Now.ToString("yyyy-MM-dd"));
xml.WriteEndElement();
}
or create a page like https://forums.asp.net/t/2160949.aspx?Create+Robots+txt+and+sitemap+xml+dynamically+in+asp+net+core

Answer 2

Here is a simple demo about how to generate xml file to server and show xml file by using url like https://mysite/sitemap.xml:
1.View:
<form asp-action="Create" enctype="multipart/form-data">
<div class="form-group">
<input type="file" name="file" id="file" class="form-control" />
</div>
<div class="form-group">
<input type="submit" value="Create" class="btn btn-default" />
</div>
2.Controller:
public class UsersController : Controller
{
private IHostingEnvironment _env;
public UsersController(IHostingEnvironment env)
{
_env = env;
}
[HttpGet]
public IActionResult Create()
{
return View();
}
[HttpPost]
public async Task<IActionResult> Create(IFormFile file)
{
var fileName = System.IO.Path.GetFileName(file.FileName);
var filePath = System.IO.Path.Combine(_env.WebRootPath, fileName);
if (file.Length > 0)
{
using (var stream = new FileStream(filePath, FileMode.Create))
{
await file.CopyToAsync(stream);
}
}
return View("Index");
}
}
3.Be sure to add app.UseStaticFiles(); like below,then you could access https://mysite/sitemap.xml:
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
//...
app.UseStaticFiles();
//...
}
4.Result: