/* Copyright (c) 2017 Ahmed Kh. Zamil Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ using System; using System.Diagnostics; using System.IO; using System.Net.Sockets; using System.Text; using System.Threading; using System.Net; using System.Collections; using System.Collections.Generic; using Esyur.Net.Sockets; using Esyur.Data; using Esyur.Net.Packets; using Esyur.Misc; using System.Security.Cryptography; using Esyur.Core; namespace Esyur.Net.HTTP { public class HTTPConnection : NetworkConnection { public void SetParent(HTTPServer Parent) { Server = Parent; } public bool WSMode { get; internal set; } private HTTPServer Server; public WebsocketPacket WSRequest { get; set; } public HTTPRequestPacket Request { get; set; } public HTTPResponsePacket Response { get; } = new HTTPResponsePacket(); HTTPSession session; public KeyList Variables { get; } = new KeyList(); internal long Parse(byte[] data) { if (WSMode) { // now parse WS protocol WebsocketPacket ws = new WebsocketPacket(); var pSize = ws.Parse(data, 0, (uint)data.Length); if (pSize > 0) { WSRequest = ws; return 0; } else { return pSize; } } else { var rp = new HTTPRequestPacket(); var pSize = rp.Parse(data, 0, (uint)data.Length); if (pSize > 0) { Request = rp; return 0; } else { return pSize; } } } public void Flush() { // close the connection if (Request.Headers["connection"].ToLower() != "keep-alive" & Connected) Close(); } public bool Upgrade() { if (IsWebsocketRequest()) { string magicString = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"; string ret = Request.Headers["Sec-WebSocket-Key"] + magicString; // Compute the SHA1 hash SHA1 sha = SHA1.Create(); byte[] sha1Hash = sha.ComputeHash(Encoding.UTF8.GetBytes(ret)); Response.Headers["Upgrade"] = Request.Headers["Upgrade"]; Response.Headers["Connection"] = Request.Headers["Connection"];// "Upgrade"; Response.Headers["Sec-WebSocket-Accept"] = Convert.ToBase64String(sha1Hash); if (Request.Headers.ContainsKey("Sec-WebSocket-Protocol")) Response.Headers["Sec-WebSocket-Protocol"] = Request.Headers["Sec-WebSocket-Protocol"]; Response.Number = HTTPResponsePacket.ResponseCode.Switching; Response.Text = "Switching Protocols"; WSMode = true; Send(); return true; } return false; } public HTTPServer Parent { get { return Server; } } public void Send(WebsocketPacket packet) { if (packet.Data != null) base.Send(packet.Data); } public override void Send(string data) { Response.Message = Encoding.UTF8.GetBytes(data); Send(); } public override void Send(byte[] msg, int offset, int length) { Response.Message = DC.Clip(msg, (uint)offset, (uint)length); Send(); } public override void Send(byte[] message) { Response.Message = message; Send(); } public void Send(HTTPResponsePacket.ComposeOptions Options = HTTPResponsePacket.ComposeOptions.AllCalculateLength) { if (Response.Handled) return; try { Response.Compose(Options); base.Send(Response.Data); // Refresh the current session if (session != null) session.Refresh(); } catch { try { Close(); } finally { } } finally { } } public void CreateNewSession() { if (session == null) { // Create a new one session = Server.CreateSession(Global.GenerateCode(12), 60 * 20); HTTPResponsePacket.HTTPCookie cookie = new HTTPResponsePacket.HTTPCookie("SID", session.Id); cookie.Expires = DateTime.MaxValue; cookie.Path = "/"; cookie.HttpOnly = true; Response.Cookies.Add(cookie); } } public bool IsWebsocketRequest() { if (Request.Headers.ContainsKey("connection") && Request.Headers["connection"].ToLower().Contains("upgrade") && Request.Headers.ContainsKey("upgrade") && Request.Headers["upgrade"].ToLower() == "websocket" && Request.Headers.ContainsKey("Sec-WebSocket-Version") && Request.Headers["Sec-WebSocket-Version"] == "13" && Request.Headers.ContainsKey("Sec-WebSocket-Key")) //&& Request.Headers.ContainsKey("Sec-WebSocket-Protocol")) { return true; } else { return false; } } public async AsyncReply SendFile(string filename) { if (Response.Handled == true) return false; try { //HTTP/1.1 200 OK //Server: Microsoft-IIS/5.0 //Content-Location: http://127.0.0.1/index.html //Date: Wed, 10 Dec 2003 19:10:25 GMT //Content-Type: text/html //Accept-Ranges: bytes //Last-Modified: Mon, 22 Sep 2003 22:36:56 GMT //Content-Length: 1957 if (!File.Exists(filename)) { Response.Number = HTTPResponsePacket.ResponseCode.NotFound; Send("File Not Found"); return true; } var fileEditTime = File.GetLastWriteTime(filename).ToUniversalTime(); if (Request.Headers.ContainsKey("if-modified-since")) { try { var ims = DateTime.Parse(Request.Headers["if-modified-since"]); if (Math.Abs((fileEditTime - ims).TotalSeconds) < 0) { Response.Number = HTTPResponsePacket.ResponseCode.NotModified; //Response.Text = "Not Modified"; Send((byte[])null); } } catch { } } Response.Number = HTTPResponsePacket.ResponseCode.OK; // Fri, 30 Oct 2007 14:19:41 GMT Response.Headers["Last-Modified"] = fileEditTime.ToString("ddd, dd MMM yyyy HH:mm:ss"); FileInfo fi = new FileInfo(filename); Response.Headers["Content-Length"] = fi.Length.ToString(); Send(HTTPResponsePacket.ComposeOptions.SpecifiedHeadersOnly); //var fd = File.ReadAllBytes(filename); //base.Send(fd); using (var fs = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read)) { var buffer = new byte[60000]; while (true) { var n = fs.Read(buffer, 0, 60000); if (n <= 0) break; //Thread.Sleep(50); await base.SendAsync(buffer, 0, n); } } return true; } catch { try { Close(); } finally { } return false; } } } }