protected override Task ProcessRequestAsync(HttpContext context)
{
var task = new Task(() => {
try {
var file = context.Server.MapPath(context.Request.Url.LocalPath);
if (!File.Exists(file))
{
return;
}
string etag;
using (var fs = new FileStream(file, FileMode.Open)) {
etag = new MD5CryptoServiceProvider().ComputeHash(fs).ToBase64String();
}
var ifnonematch = context.Request.Headers[Header.IfNoneMatch];
if (!string.IsNullOrEmpty(ifnonematch) && etag.Equals(ifnonematch))
{
context.Response.StatusCode = 304;
}
else
{
context.Response.AddHeader(Header.ETag, etag);
context.Response.AddHeader(Header.CacheControl, "max-age=630000, public");
context.Response.AddHeader(Header.Vary, Header.AcceptEncoding);
context.Response.AppendHeader(Header.Expires, DateTime.Now.Date.AddDays(8).ToString("R"));
context.Response.ContentType = MimeMapping.GetMimeMapping(file);
if (context.Response.ContentType.StartsWith("text/") ||
context.Response.ContentType.Equals("application/javascript") ||
context.Response.ContentType.Equals("application/json"))
{
context.SetCompression();
}
context.Response.WriteFile(file);
}
} catch (Exception e) {
IoC.Resolve <ILogger>().Error("Error in static file handler.", e);
}
});
task.Start();
return(task);
}