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Esyur/Net/Packets/HTTPResponsePacket.cs
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307
Esyur/Net/Packets/HTTPResponsePacket.cs
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/*
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Copyright (c) 2017 Ahmed Kh. Zamil
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using Esyur.Misc;
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using Esyur.Data;
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namespace Esyur.Net.Packets
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{
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public class HTTPResponsePacket : Packet
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{
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public enum ComposeOptions : int
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{
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AllCalculateLength,
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AllDontCalculateLength,
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SpecifiedHeadersOnly,
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DataOnly
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}
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public enum ResponseCode : int
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{
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HTTP_SWITCHING = 101,
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HTTP_OK = 200,
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HTTP_NOTFOUND = 404,
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HTTP_SERVERERROR = 500,
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HTTP_MOVED = 301,
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HTTP_NOTMODIFIED = 304,
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HTTP_REDIRECT = 307
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}
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public class HTTPCookie
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{
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public string Name;
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public string Value;
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public DateTime Expires;
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public string Path;
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public bool HttpOnly;
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public string Domain;
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public HTTPCookie(string Name, string Value)
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{
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this.Name = Name;
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this.Value = Value;
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}
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public HTTPCookie(string Name, string Value, DateTime Expires)
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{
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this.Name = Name;
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this.Value = Value;
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this.Expires = Expires;
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}
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public override string ToString()
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{
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//Set-Cookie: ckGeneric=CookieBody; expires=Sun, 30-Dec-2001 21:00:00 GMT; domain=.com.au; path=/
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//Set-Cookie: SessionID=another; expires=Fri, 29 Jun 2006 20:47:11 UTC; path=/
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string Cookie = Name + "=" + Value;
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if (Expires.Ticks != 0)
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{
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Cookie += "; expires=" + Expires.ToUniversalTime().ToString("ddd, dd MMM yyyy HH:mm:ss") + " GMT";
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}
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if (Domain != null)
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{
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Cookie += "; domain=" + Domain;
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}
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if (Path != null)
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{
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Cookie += "; path=" + Path;
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}
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if (HttpOnly)
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{
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Cookie += "; HttpOnly";
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}
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return Cookie;
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}
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}
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public StringKeyList Headers = new StringKeyList(true);
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public string Version = "HTTP/1.1";
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public byte[] Message;
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public ResponseCode Number;
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public string Text;
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//public DStringDictionary Cookies;
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public List<HTTPCookie> Cookies = new List<HTTPCookie>();
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public bool Handled;
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//public bool ResponseHandled; //flag this as true if you are handling it yourself
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//private bool createSession;
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//private HTTPServer Server;
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//public HTTPSession Session;
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public override string ToString()
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{
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return "HTTPResponsePacket"
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+ "\n\tVersion: " + Version
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//+ "\n\tMethod: " + Method
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//+ "\n\tURL: " + URL
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+ "\n\tMessage: " + (Message != null ? Message.Length.ToString() : "NULL");
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}
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private string MakeHeader(ComposeOptions Options)
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{
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string header = Version + " " + (int)Number + " " + Text + "\r\n"
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+ "Server: Delta Web Server\r\n"
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//Fri, 30 Oct 2007 14:19:41 GMT"
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+ "Date: " + DateTime.Now.ToUniversalTime().ToString("r") + "\r\n";
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if (Options == ComposeOptions.AllCalculateLength && Message != null)
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{
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Headers["Content-Length"] = Message.Length.ToString();
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}
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foreach (var kv in Headers)
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{
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header += kv.Key + ": " + kv.Value + "\r\n";
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}
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// Set-Cookie: ckGeneric=CookieBody; expires=Sun, 30-Dec-2007 21:00:00 GMT; path=/
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// Set-Cookie: ASPSESSIONIDQABBDSQA=IPDPMMMALDGFLMICEJIOCIPM; path=/
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foreach (var Cookie in Cookies)
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{
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header += "Set-Cookie: " + Cookie.ToString() + "\r\n";
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}
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header += "\r\n";
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return header;
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}
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public bool Compose(ComposeOptions options)
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{
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List<byte> msg = new List<byte>();
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if (options != ComposeOptions.DataOnly)
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{
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msg.AddRange(Encoding.UTF8.GetBytes(MakeHeader(options)));
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}
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if (options != ComposeOptions.SpecifiedHeadersOnly)
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{
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if (Message != null)
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msg.AddRange(Message);
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}
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Data = msg.ToArray();
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return true;
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}
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public override bool Compose()
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{
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return Compose(ComposeOptions.AllDontCalculateLength);
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}
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public override long Parse(byte[] data, uint offset, uint ends)
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{
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string[] sMethod = null;
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string[] sLines = null;
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uint headerSize = 0;
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for (uint i = offset; i < ends - 3; i++)
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{
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if (data[i] == '\r' && data[i + 1] == '\n'
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&& data[i + 2] == '\r' && data[i + 3] == '\n')
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{
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sLines = Encoding.ASCII.GetString(data, (int)offset, (int)(i - offset)).Split(new string[] { "\r\n" },
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StringSplitOptions.None);
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headerSize = i + 4;
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break;
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}
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}
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if (headerSize == 0)
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return -1;
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//Cookies = new DStringDictionary();
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//Headers = new DStringDictionary(true);
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sMethod = sLines[0].Split(' ');
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if (sMethod.Length == 3)
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{
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Version = sMethod[0].Trim();
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Number = (ResponseCode)(Convert.ToInt32(sMethod[1].Trim()));
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Text = sMethod[2];
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}
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// Read all headers
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for (int i = 1; i < sLines.Length; i++)
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{
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if (sLines[i] == String.Empty)
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{
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// Invalid header
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return 0;
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}
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if (sLines[i].IndexOf(':') == -1)
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{
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// Invalid header
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return 0;
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}
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string[] header = sLines[i].Split(new char[] { ':' }, 2);
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header[0] = header[0].ToLower();
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Headers[header[0]] = header[1].Trim();
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//Set-Cookie: NAME=VALUE; expires=DATE;
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if (header[0] == "set-cookie")
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{
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string[] cookie = header[1].Split(';');
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if (cookie.Length >= 1)
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{
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string[] splitCookie = cookie[0].Split('=');
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HTTPCookie c = new HTTPCookie(splitCookie[0], splitCookie[1]);
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for (int j = 1; j < cookie.Length; j++)
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{
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splitCookie = cookie[j].Split('=');
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switch (splitCookie[0].ToLower())
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{
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case "domain":
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c.Domain = splitCookie[1];
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break;
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case "path":
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c.Path = splitCookie[1];
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break;
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case "httponly":
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c.HttpOnly = true;
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break;
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case "expires":
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// Wed, 13-Jan-2021 22:23:01 GMT
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c.Expires = DateTime.Parse(splitCookie[1]);
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break;
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}
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}
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}
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}
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}
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// Content-Length
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try
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{
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uint contentLength = uint.Parse((string)Headers["content-length"]);
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// check limit
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if (contentLength > data.Length - headerSize)
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{
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return contentLength - (data.Length - headerSize);
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}
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Message = DC.Clip(data, offset, contentLength);
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return headerSize + contentLength;
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}
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catch
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{
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return 0;
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}
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}
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}
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}
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