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//
// System.Web.Compilation.SessionStateItemCollection
//
// Authors:
// Marek Habersack (grendello@gmail.com)
//
// (C) 2006 Marek Habersack
//
//
// 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.Web;
using System.Web.Configuration;
using System.Web.Util;
namespace System.Web.SessionState
{
public class SessionIDManager : ISessionIDManager
{
SessionStateSection config;
public SessionIDManager ()
{
}
public static int SessionIDMaxLength {
get { return 80; }
}
// Todo: find use for the context parameter?
public virtual string CreateSessionID (HttpContext context)
{
return SessionId.Create ();
}
public virtual string Decode (string id)
{
return HttpUtility.UrlDecode (id);
}
public virtual string Encode (string id)
{
return HttpUtility.UrlEncode (id);
}
public string GetSessionID (HttpContext context)
{
string ret = null;
if (SessionStateModule.IsCookieLess (context, config)) {
string tmp = context.Request.Headers [SessionStateModule.HeaderName];
if (tmp != null)
ret = Decode (tmp);
} else {
HttpCookie cookie = context.Request.Cookies [config.CookieName];
if (cookie != null)
ret = Decode (cookie.Value);
}
if (ret != null && ret.Length > SessionIDMaxLength)
throw new HttpException ("The length of the session-identifier value retrieved from the HTTP request exceeds the SessionIDMaxLength value.");
if (!Validate (ret))
throw new HttpException ("Invalid session ID");
return ret;
}
public void Initialize ()
{
config = WebConfigurationManager.GetSection ("system.web/sessionState") as SessionStateSection;
}
public bool InitializeRequest (HttpContext context, bool suppressAutoDetectRedirect, out bool supportSessionIDReissue)
{
// TODO: Implement AutoDetect handling
if (config.CookieLess) {
supportSessionIDReissue = true;
return false;
} else {
supportSessionIDReissue = false;
return false;
}
}
public void RemoveSessionID (HttpContext context)
{
context.Response.Cookies.Remove(config.CookieName);
}
// TODO: add code to check whether the response has already been sent
public void SaveSessionID (HttpContext context, string id, out bool redirected, out bool cookieAdded)
{
if (!Validate (id))
throw new HttpException ("Invalid session ID");
HttpRequest request = context.Request;
if (!SessionStateModule.IsCookieLess (context, config)) {
HttpCookie cookie = new HttpCookie (config.CookieName, id);
cookie.Path = request.ApplicationPath;
context.Response.AppendCookie (cookie);
cookieAdded = true;
redirected = false;
} else {
request.SetHeader (SessionStateModule.HeaderName, id);
cookieAdded = false;
redirected = true;
UriBuilder newUri = new UriBuilder (request.Url);
newUri.Path = UrlUtils.InsertSessionId (id, request.FilePath);
context.Response.Redirect (newUri.Uri.PathAndQuery, false);
}
}
public virtual bool Validate (string id)
{
return true;
}
}
}
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