private bool CheckFileCache(HttpHandlerContext context, string filename)
{
#if (CACHECONTROL)
var connection = context.Connection;
var request = connection.ListenerContext.Request;
var finfo = new FileInfo(filename);
var nochacecontrol = request.Headers["Cache-Control"];
if (!string.IsNullOrEmpty(nochacecontrol) && nochacecontrol.IndexOf("no-cache") != -1)
{
return(false);
}
if (!string.IsNullOrEmpty(nochacecontrol) && nochacecontrol.IndexOf("only-if-cached") != -1)
{
return(true);
}
var ifModifiedScince = request.Headers["If-Modified-Since"];
if (!string.IsNullOrEmpty(ifModifiedScince))
{
DateTime cacheModified;
if (DateTime.TryParseExact(ifModifiedScince, "R", CultureInfo.InvariantCulture, DateTimeStyles.None, out cacheModified) ||
DateTime.TryParseExact(ifModifiedScince, "ddd, dd MMM yyyy hh", CultureInfo.InvariantCulture, DateTimeStyles.None, out cacheModified))
{
if (cacheModified.Date >= finfo.LastWriteTimeUtc.Date)
{
connection.WriteEntireResponseFromString(304, null, "", false);
return(true);
}
}
}
//Split req etag
var requestEtag = request.Headers["If-None-Match"];
var etag = string.Format("\"{0}.{1}\"", finfo.LastWriteTimeUtc.ToFileTimeUtc(), finfo.Length);
if (!string.IsNullOrEmpty(requestEtag))
{
string[] reqetags = requestEtag.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
foreach (var reqetag in reqetags)
{
if (etag.Equals(reqetag))
{
connection.WriteEntireResponseFromString(304, null, "", false);
return(true);
}
}
}
#if (ETAG)
SendUnknownResponseHeader("Etag", etag);
#endif
connection.ListenerContext.Response.Headers[HttpResponseHeader.LastModified] = finfo.LastWriteTimeUtc.ToString("R");
connection.ListenerContext.Response.Headers[HttpResponseHeader.Expires] = DateTime.UtcNow.AddDays(1).ToString("R");
#endif
return(false);
}
private bool CheckFileCache(HttpHandlerContext context, string filename)
{
#if (CACHECONTROL)
var connection = context.Connection;
var request = connection.ListenerContext.Request;
var finfo = new FileInfo(filename);
var nochacecontrol = request.Headers["Cache-Control"];
if (!string.IsNullOrEmpty(nochacecontrol) && nochacecontrol.IndexOf("no-cache") != -1)
{
return false;
}
if (!string.IsNullOrEmpty(nochacecontrol) && nochacecontrol.IndexOf("only-if-cached") != -1)
{
return true;
}
var ifModifiedScince = request.Headers["If-Modified-Since"];
if (!string.IsNullOrEmpty(ifModifiedScince))
{
DateTime cacheModified;
if (DateTime.TryParseExact(ifModifiedScince, "R", CultureInfo.InvariantCulture, DateTimeStyles.None, out cacheModified) ||
DateTime.TryParseExact(ifModifiedScince, "ddd, dd MMM yyyy hh", CultureInfo.InvariantCulture, DateTimeStyles.None, out cacheModified))
{
if (cacheModified.Date >= finfo.LastWriteTimeUtc.Date)
{
connection.WriteEntireResponseFromString(304, null, "", false);
return true;
}
}
}
//Split req etag
var requestEtag = request.Headers["If-None-Match"];
var etag = string.Format("\"{0}.{1}\"", finfo.LastWriteTimeUtc.ToFileTimeUtc(), finfo.Length);
if (!string.IsNullOrEmpty(requestEtag))
{
string[] reqetags = requestEtag.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
foreach (var reqetag in reqetags)
{
if (etag.Equals(reqetag))
{
connection.WriteEntireResponseFromString(304, null, "", false);
return true;
}
}
}
#if (ETAG)
SendUnknownResponseHeader("Etag", etag);
#endif
connection.ListenerContext.Response.Headers[HttpResponseHeader.LastModified] = finfo.LastWriteTimeUtc.ToString("R");
connection.ListenerContext.Response.Headers[HttpResponseHeader.Expires] = DateTime.UtcNow.AddDays(1).ToString("R");
#endif
return false;
}
private string GetFileName(HttpHandlerContext context)
{
var virtRoot = context.Server.VirtualPath;
var physRoot = context.Server.PhysicalPath;
var virtPath = context.Connection.ListenerContext.Request.Url.LocalPath;
if (virtPath.StartsWith(virtRoot, StringComparison.OrdinalIgnoreCase))
{
virtPath = virtPath.Substring(virtRoot.Length).Replace('/', '\\');
return(Path.Combine(physRoot, virtPath));
}
return(null);
}
private static IEnumerable <IHttpHandler> GetHandlers(HttpHandlerContext context)
{
var extension = Path.GetExtension(context.Connection.ListenerContext.Request.Url.AbsolutePath);
if (extension != null && extension.StartsWith("."))
{
extension = extension.Substring(1);
IHttpHandler handler;
if (handlers.TryGetValue(extension, out handler))
{
yield return(handler);
}
}
yield return(DefaultHttpHandler);
yield return(AspNetHandler);
yield return(DirectoryHttpHandler);
}
public void ProcessRequest(HttpHandlerContext context)
{
try
{
if (IsInRestrictDir(context.Connection.ListenerContext.Request.Url.LocalPath))
{
context.Connection.WriteErrorWithExtraHeadersAndKeepAlive(403, null);
return;
}
var filename = GetFileName(context);
if (string.IsNullOrEmpty(filename) || !File.Exists(filename))
{
context.Connection.WriteErrorWithExtraHeadersAndKeepAlive(404, null);
return;
}
if (!CheckFileCache(context, filename))
{
using (var f = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read))
{
var keepAlive = string.CompareOrdinal(context.Connection.ListenerContext.Request.Headers["Connection"], "keep-alive") == 0;
var compress = false;
#if (GZIP)
if (compressedExt.Contains(Path.GetExtension(filename)))
{
var acceptEncoding = context.Connection.ListenerContext.Request.Headers["Accept-Encoding"];
if (!string.IsNullOrEmpty(acceptEncoding) && acceptEncoding.Contains("gzip"))
{
compress = true;
}
}
#endif
context.Connection.WriteEntireResponseFromFile(filename, keepAlive, compress);
}
}
}
catch (Exception)
{
context.Connection.WriteErrorAndClose(500);
}
}
public void ProcessRequest(HttpHandlerContext context)
{
try
{
if (IsInRestrictDir(context.Connection.ListenerContext.Request.Url.LocalPath))
{
context.Connection.WriteErrorWithExtraHeadersAndKeepAlive(403, null);
return;
}
var filename = GetFileName(context);
if (string.IsNullOrEmpty(filename) || !File.Exists(filename))
{
context.Connection.WriteErrorWithExtraHeadersAndKeepAlive(404, null);
return;
}
if (!CheckFileCache(context, filename))
{
using (var f = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read))
{
var keepAlive = string.CompareOrdinal(context.Connection.ListenerContext.Request.Headers["Connection"], "keep-alive") == 0;
var compress = false;
#if (GZIP)
if (compressedExt.Contains(Path.GetExtension(filename)))
{
var acceptEncoding = context.Connection.ListenerContext.Request.Headers["Accept-Encoding"];
if (!string.IsNullOrEmpty(acceptEncoding) && acceptEncoding.Contains("gzip"))
compress = true;
}
#endif
context.Connection.WriteEntireResponseFromFile(filename, keepAlive, compress);
}
}
}
catch (Exception)
{
context.Connection.WriteErrorAndClose(500);
}
}
public bool CanHandle(HttpHandlerContext context)
{
/*asp.net can handle all requests*/
return true;
}
public void ProcessRequest(HttpHandlerContext context)
{
context.Host.ProcessRequest(context.Connection, context.Identity);
}
private static IEnumerable<IHttpHandler> GetHandlers(HttpHandlerContext context)
{
var extension = Path.GetExtension(context.Connection.ListenerContext.Request.Url.AbsolutePath);
if (extension != null && extension.StartsWith("."))
{
extension = extension.Substring(1);
IHttpHandler handler;
if (handlers.TryGetValue(extension, out handler))
{
yield return handler;
}
}
yield return DefaultHttpHandler;
yield return AspNetHandler;
yield return DirectoryHttpHandler;
}
public static IHttpHandler GetHttpHandler(HttpHandlerContext context)
{
return GetHandlers(context).FirstOrDefault(x=>x.CanHandle(context)) ?? DirectoryHttpHandler;
}
private string GetFileName(HttpHandlerContext context)
{
var virtRoot = context.Server.VirtualPath;
var physRoot = context.Server.PhysicalPath;
var virtPath = context.Connection.ListenerContext.Request.Url.LocalPath;
if (virtPath.StartsWith(virtRoot, StringComparison.OrdinalIgnoreCase))
{
virtPath = virtPath.Substring(virtRoot.Length).Replace('/', '\\');
return Path.Combine(physRoot, virtPath);
}
return null;
}
public bool CanHandle(HttpHandlerContext context)
{
/*asp.net can handle all requests*/
return(true);
}
public void ProcessRequest(HttpHandlerContext context)
{
context.Host.ProcessRequest(context.Connection, context.Identity);
}
public bool CanHandle(HttpHandlerContext context)
{
var filename = GetFileName(context);
return(!(string.IsNullOrEmpty(filename) || !File.Exists(filename)));
}
public static IHttpHandler GetHttpHandler(HttpHandlerContext context)
{
return(GetHandlers(context).FirstOrDefault(x => x.CanHandle(context)) ?? DirectoryHttpHandler);
}
public bool CanHandle(HttpHandlerContext context)
{
var filename = GetFileName(context);
return !(string.IsNullOrEmpty(filename) || !File.Exists(filename));
}