// https://stackoverflow.com/questions/40001242/aspnetcore-get-path-to-wwwroot-in-taghelper
public override void Process(Microsoft.AspNetCore.Razor.TagHelpers.TagHelperContext context
, Microsoft.AspNetCore.Razor.TagHelpers.TagHelperOutput output)
{
EnsureFileVersionProvider();
Microsoft.AspNetCore.Mvc.IUrlHelper urlHelper =
base.UrlHelperFactory.GetUrlHelper(this.ActionContext);
// string myUrl = urlHelper.Content("~/somefilebelowwwwroot");
// string imgPath = output.Attributes["src"].Value as string;
// Microsoft.AspNetCore.Html.HtmlString hs = output.Attributes["src"].Value as Microsoft.AspNetCore.Html.HtmlString;
// string imgPath = hs.Value;
// Microsoft.AspNetCore.Html.HtmlString hs = context.AllAttributes["src"].Value as Microsoft.AspNetCore.Html.HtmlString;
// string imgPath = hs.Value;
// var rcc = new Microsoft.AspNetCore.Mvc.Routing.UrlRouteContext();
// var rc = new Microsoft.AspNetCore.Routing.RouteContext(this.HttpContext);
// lol = urlHelper.RouteUrl(rcc);
string baseSrc = context.AllAttributes["src"].Value.ToString();
if (baseSrc.StartsWith("data:"))
{
return;
}
PathMap pm = PathMap.FromUrl(this.HostingEnvironment, urlHelper, baseSrc);
System.IO.FileInfo fi = new System.IO.FileInfo(pm.Physical);
string unixTicks = fi.Exists ? fi.LastWriteTimeUtc.ToUnixTicksString()
: System.DateTime.UtcNow.ToUnixTicksString();
if (string.IsNullOrEmpty(pm.QueryString))
{
baseSrc = $"{pm.Absolute}?no_cache={unixTicks}{pm.Hash}";
}
else
{
baseSrc = $"{pm.Absolute}{pm.QueryString}&no_cache={unixTicks}{pm.Hash}";
}
// No not have it XML-Attribute-encoded
//output.Attributes.SetAttribute("src", new Microsoft.AspNetCore.Html.HtmlString(imgPath));
output.Attributes.SetAttribute("src", baseSrc);
//output.Attributes.SetAttribute("src", src + "?&v=123");
// output.Attributes.SetAttribute(SrcAttributeName, _fileVersionProvider.AddFileVersionToPath(Src));
}