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using System;
using System.Collections.Generic;
using System.Globalization;
using System.Net;
using System.Text;
using System.Threading.Tasks;
namespace SocketHttpListener.Net
{
public static class CookieHelper
{
internal static CookieCollection Parse(string value, bool response)
{
return response
? parseResponse(value)
: null;
}
private static string[] splitCookieHeaderValue(string value)
{
return new List<string>(value.SplitHeaderValue(',', ';')).ToArray();
}
private static CookieCollection parseResponse(string value)
{
var cookies = new CookieCollection();
Cookie cookie = null;
var pairs = splitCookieHeaderValue(value);
for (int i = 0; i < pairs.Length; i++)
{
var pair = pairs[i].Trim();
if (pair.Length == 0)
continue;
if (pair.StartsWith("version", StringComparison.OrdinalIgnoreCase))
{
if (cookie != null)
cookie.Version = Int32.Parse(pair.GetValueInternal("=").Trim('"'));
}
else if (pair.StartsWith("expires", StringComparison.OrdinalIgnoreCase))
{
var buffer = new StringBuilder(pair.GetValueInternal("="), 32);
if (i < pairs.Length - 1)
buffer.AppendFormat(", {0}", pairs[++i].Trim());
DateTime expires;
if (!DateTime.TryParseExact(
buffer.ToString(),
new[] { "ddd, dd'-'MMM'-'yyyy HH':'mm':'ss 'GMT'", "r" },
new CultureInfo("en-US"),
DateTimeStyles.AdjustToUniversal | DateTimeStyles.AssumeUniversal,
out expires))
expires = DateTime.Now;
if (cookie != null && cookie.Expires == DateTime.MinValue)
cookie.Expires = expires.ToLocalTime();
}
else if (pair.StartsWith("max-age", StringComparison.OrdinalIgnoreCase))
{
var max = Int32.Parse(pair.GetValueInternal("=").Trim('"'));
var expires = DateTime.Now.AddSeconds((double)max);
if (cookie != null)
cookie.Expires = expires;
}
else if (pair.StartsWith("path", StringComparison.OrdinalIgnoreCase))
{
if (cookie != null)
cookie.Path = pair.GetValueInternal("=");
}
else if (pair.StartsWith("domain", StringComparison.OrdinalIgnoreCase))
{
if (cookie != null)
cookie.Domain = pair.GetValueInternal("=");
}
else if (pair.StartsWith("port", StringComparison.OrdinalIgnoreCase))
{
var port = pair.Equals("port", StringComparison.OrdinalIgnoreCase)
? "\"\""
: pair.GetValueInternal("=");
if (cookie != null)
cookie.Port = port;
}
else if (pair.StartsWith("comment", StringComparison.OrdinalIgnoreCase))
{
if (cookie != null)
cookie.Comment = pair.GetValueInternal("=").UrlDecode();
}
else if (pair.StartsWith("commenturl", StringComparison.OrdinalIgnoreCase))
{
if (cookie != null)
cookie.CommentUri = pair.GetValueInternal("=").Trim('"').ToUri();
}
else if (pair.StartsWith("discard", StringComparison.OrdinalIgnoreCase))
{
if (cookie != null)
cookie.Discard = true;
}
else if (pair.StartsWith("secure", StringComparison.OrdinalIgnoreCase))
{
if (cookie != null)
cookie.Secure = true;
}
else if (pair.StartsWith("httponly", StringComparison.OrdinalIgnoreCase))
{
if (cookie != null)
cookie.HttpOnly = true;
}
else
{
if (cookie != null)
cookies.Add(cookie);
string name;
string val = String.Empty;
var pos = pair.IndexOf('=');
if (pos == -1)
{
name = pair;
}
else if (pos == pair.Length - 1)
{
name = pair.Substring(0, pos).TrimEnd(' ');
}
else
{
name = pair.Substring(0, pos).TrimEnd(' ');
val = pair.Substring(pos + 1).TrimStart(' ');
}
cookie = new Cookie(name, val);
}
}
if (cookie != null)
cookies.Add(cookie);
return cookies;
}
}
}
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