private void SendFile(HttpContext context, string filePath)
{
try
{
ADUser currentUser = LdapHelper.GetAdUser(context.User.Identity.Name);
if (currentUser != null)
{
////Start impersonating
WindowsIdentity wi = new WindowsIdentity(currentUser.UserPrincipalName);
using (WindowsImpersonationContext wCtx = wi.Impersonate())
{
try
{
string fileUrl = makeFullFileUrl(filePath);
string fileName = Path.GetFileName(fileUrl);
FileInfo fileInfo = new FileInfo(fileUrl);
context.Response.Clear();
context.Response.ClearContent();
context.Response.ClearHeaders();
context.Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName);
// bypass the Open/Save/Cancel dialog
//Response.AddHeader("Content-Disposition", "inline; filename=" + doc.FileName);
context.Response.AddHeader("Content-Length", fileInfo.Length.ToString());
// Set the ContentType
context.Response.ContentType = MimeMapping.GetMimeMapping(fileName);
context.Response.BufferOutput = true;
//var file = File.ReadAllBytes(fileUrl);
context.Response.WriteFile(fileUrl, true);
context.Response.Flush();
context.ApplicationInstance.CompleteRequest();
}
catch (System.UnauthorizedAccessException)
{
//The current user does not have rights, give them access denied
context.Response.Clear();
context.Response.ClearContent();
context.Response.ClearHeaders();
context.Response.StatusCode = 401;
context.Response.Write("Access denied. You do not have access to this file.");
}
catch (Exception ex)
{
//Something happened trying to fetch the file
context.Response.Clear();
context.Response.ClearContent();
context.Response.ClearHeaders();
context.Response.StatusCode = 500;
context.Response.Write($"An error occured trying to serve the file. {ex.ToString()}");
}
finally
{
if (wCtx != null)
{
wCtx.Undo();
}
}
}
}
}
catch (System.Security.SecurityException)
{
//The current user is not a synced account, the UPN is invalid
context.Response.Clear();
context.Response.ClearContent();
context.Response.ClearHeaders();
context.Response.StatusCode = 401;
context.Response.Write("Access denied. Not a valid user.");
}
}