public static bool HandleIfNotModified(this HttpConnection p, DateTime lastModified, string etag, string lastModifiedString)
{
if (lastModified != null)
{
p.setHeader("Last-Modified", lastModifiedString);
}
if (etag != null)
{
p.setHeader("Etag", etag);
}
//p.setHeader("Cache-Control", "public,max-age=3600");
var notmod = (etag != null && p.GetReqHeader("If-None-Match") == etag);
if (!notmod)
{
if (lastModified > DateTime.MinValue)
{
var sinceStr = p.GetReqHeader("If-Modified-Since");
if (sinceStr != null && DateTime.TryParse(sinceStr, out var since))
{
if (since <= lastModified)
{
notmod = true;
}
}
}
}
if (notmod)
{
p.ResponseStatusCode = "304 Not Modified";
}
return(notmod);
}
public static async Task HandleFileAsync(HttpConnection p, string path)
{
FileInfo fi = new FileInfo(path);
using (var fs = File.Open(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) {
var type = GetHttpContentTypeFromPath(path);
if (type != null)
{
p.setHeader(HttpHeaders.KEY_Content_Type, type);
}
else
{
p.setHeader(HttpHeaders.KEY_Content_Type, "application/octet-stream");
}
if (p.HandleIfNotModified(fi.LastWriteTimeUtc.ToString("R")))
{
return;
}
await HandleFileStreamAsync(p, fs, (type == null ? fi.Name : null), false);
}
}
public async Task <WsHandleRequestResult> HandleRequestAsync(bool enterRecvLoop)
{
List <string> connectionSplits = p.GetReqHeaderSplits("Connection");
if (p.Method == "GET" &&
p.GetReqHeader("Upgrade") == "websocket" &&
(connectionSplits.Contains("Upgrade") || connectionSplits.Contains("upgrade")))
{
p.Handled = true;
if (p.GetReqHeader("Sec-WebSocket-Version") != "13")
{
p.ResponseStatusCode = "400 Bad Request";
p.setHeader("Sec-WebSocket-Version", "13");
return(new WsHandleRequestResult(WsHandleRequestResult.Results.BadVersion));
}
var wskey = p.GetReqHeader("Sec-WebSocket-Key");
if (wskey == null)
{
p.ResponseStatusCode = "400 Bad Request";
p.keepAlive = false;
return(new WsHandleRequestResult(WsHandleRequestResult.Results.BadKey));
}
p.ResponseStatusCode = "101 Switching Protocols";
p.setHeader("Upgrade", "websocket");
p.setHeader("Connection", "Upgrade");
p.setHeader("Sec-WebSocket-Accept", GetWebsocketAcceptKey(wskey));
p.keepAlive = false;
await p.EndResponseAsync().CAF();
p.SwitchProtocol();
ConnectionState = States.Open;
if (enterRecvLoop)
{
await recvLoopAsync().CAF();
}
return(new WsHandleRequestResult(WsHandleRequestResult.Results.Connected));
}
return(new WsHandleRequestResult(WsHandleRequestResult.Results.NonWebsocket));
}
