protected void Page_Load(object Sender, EventArgs E)
{
// Pull out the http request
HttpRequest request = HttpContext.Current.Request;
if (String.IsNullOrEmpty(SobekCM_Database.Connection_String))
{
Custom_Tracer tracer = new Custom_Tracer();
try
{
tracer.Add_Trace("SobekCM_Page_Globals.Constructor", String.Empty);
// Don't really need to *build* these, so just define them as a new ones if null
if (Global.Checked_List == null)
{
Global.Checked_List = new Checked_Out_Items_List();
}
if (Global.Search_History == null)
{
Global.Search_History = new Recent_Searches();
}
// Make sure all the needed data is loaded into the Application State
Application_State_Builder.Build_Application_State(tracer, false, ref Global.Skins, ref Global.Translation,
ref Global.Codes, ref Global.Item_List, ref Global.Icon_List,
ref Global.Stats_Date_Range, ref Global.Thematic_Headings, ref Global.Collection_Aliases, ref Global.IP_Restrictions,
ref Global.URL_Portals, ref Global.Mime_Types, ref Global.Item_Viewer_Priority);
tracer.Add_Trace("SobekCM_Page_Globals.Constructor", "Application State validated or built");
// Check that something is saved for the original requested URL (may not exist if not forwarded)
if (!HttpContext.Current.Items.Contains("Original_URL"))
{
HttpContext.Current.Items["Original_URL"] = request.Url.ToString();
}
}
catch (Exception ee)
{
// Send to the dashboard
if ((HttpContext.Current.Request.UserHostAddress == "127.0.0.1") || (HttpContext.Current.Request.UserHostAddress == HttpContext.Current.Request.ServerVariables["LOCAL_ADDR"]) || (HttpContext.Current.Request.Url.ToString().IndexOf("localhost") >= 0))
{
// Create an error message
string errorMessage;
if ((SobekCM_Library_Settings.Database_Connections.Count == 0) || (String.IsNullOrEmpty(SobekCM_Library_Settings.Database_Connections[0].Connection_String)))
{
errorMessage = "No database connection string found!";
string configFileLocation = AppDomain.CurrentDomain.BaseDirectory + "config/sobekcm.xml";
try
{
if (!File.Exists(configFileLocation))
{
errorMessage = "Missing config/sobekcm.xml configuration file on the web server.<br />Ensure the configuration file 'sobekcm.xml' exists in a 'config' subfolder directly under the web application.<br />Example configuration is:" +
"<div style=\"background-color: #bbbbbb; margin-left: 30px; margin-top:10px; padding: 3px;\"><?xml version="1.0" encoding="UTF-8" standalone="yes" ?><br /> <configuration><br />   <connection_string type="MSSQL">data source=localhost\\instance;initial catalog=SobekCM;integrated security=Yes;</connection_string><br />   <error_emails>[email protected]</error_emails><br />   <error_page>http://ufdc.ufl.edu/error.html</error_page><br /></configuration></div>";
}
}
catch
{
errorMessage = "No database connection string found.<br />Likely an error reading the configuration file due to permissions on the web server.<br />Ensure the configuration file 'sobekcm.xml' exists in a 'config' subfolder directly under the web application.<br />Example configuration is:" +
"<div style=\"background-color: #bbbbbb; margin-left: 30px; margin-top:10px; padding: 3px;\"><?xml version="1.0" encoding="UTF-8" standalone="yes" ?><br /> <configuration><br />   <connection_string type="MSSQL">data source=localhost\\instance;initial catalog=SobekCM;integrated security=Yes;</connection_string><br />   <error_emails>[email protected]</error_emails><br />   <error_page>http://ufdc.ufl.edu/error.html</error_page><br /></configuration></div>";
}
}
else
{
if (ee.Message.IndexOf("The EXECUTE permission") >= 0)
{
errorMessage = "Permissions error while connecting to the database and pulling necessary data.<br /><br />Confirm the following:<ul><li>IIS is configured correctly to use anonymous authentication</li><li>Anonymous user (or service account) is part of the sobek_users role in the database.</li></ul>";
}
else
{
errorMessage = "Error connecting to the database and pulling necessary data.<br /><br />Confirm the following:<ul><li>Database connection string is correct ( " + SobekCM_Library_Settings.Database_Connections[0].Connection_String + ")</li><li>IIS is configured correctly to use anonymous authentication</li><li>Anonymous user (or service account) is part of the sobek_users role in the database.</li></ul>";
}
}
// Wrap this into the SobekCM Exception
SobekCM_Traced_Exception newException = new SobekCM_Traced_Exception(errorMessage, ee, tracer);
// Save this to the session state, and then forward to the dashboard
HttpContext.Current.Session["Last_Exception"] = newException;
HttpContext.Current.Response.Redirect("dashboard.aspx", true);
}
else
{
throw ee;
}
}
}
string bibID = null;
string vid = null;
// Is this a robot? They should never get access to files this way
if (SobekCM_Navigation_Object.Is_UserAgent_IP_Robot(request.UserAgent, request.UserHostAddress))
{
Response.Clear();
Response.Output.WriteLine("RESTRICTED ITEM");
return;
}
// Get any url rewrite which occurred
if (Request.QueryString["urlrelative"] != null)
{
string urlrewrite = Request.QueryString["urlrelative"].ToLower();
if (urlrewrite.Length > 4)
{
// Split the url relative list
string[] url_relative_info = urlrewrite.Split("/".ToCharArray());
List <string> url_relative_list = (from thisPart in url_relative_info where thisPart.Length > 0 select thisPart.ToLower()).ToList();
// Now, look for BIBID and VID
//if ((SobekCM_Database.Verify_Item_Lookup_Object(true, ref Global.Item_List, null)) && (Global.Item_List.Contains_BibID(url_relative_list[2].ToUpper())))
if ((url_relative_list.Count > 2) && (url_relative_list[2].Length == 10))
{
// This is a BibID for an existing title with at least one public item
bibID = url_relative_list[2].ToUpper();
// Is the next part a VID?
if (url_relative_list.Count > 3)
{
string possible_vid = url_relative_list[3].Trim().PadLeft(5, '0');
int vid_as_int;
if (Int32.TryParse(possible_vid, out vid_as_int))
{
vid = possible_vid;
}
}
}
// Only continue if there is a BibID / VID
if ((!String.IsNullOrEmpty(bibID)) && (!String.IsNullOrEmpty(vid)))
{
// Determine the new URL
StringBuilder urlBuilder = new StringBuilder(SobekCM_Library_Settings.Image_Server_Network + bibID.Substring(0, 2) + "\\" + bibID.Substring(2, 2) + "\\" + bibID.Substring(4, 2) + "\\" + bibID.Substring(6, 2) + "\\" + bibID.Substring(8) + "\\" + vid + "\\" + url_relative_list[4], 250);
for (int i = 5; i < url_relative_list.Count; i++)
{
urlBuilder.Append("\\" + url_relative_list[i]);
}
file_url = urlBuilder.ToString();
// Get the extension
string extension = Path.GetExtension(file_url);
if (extension != null)
{
// Lookup the MIME type by extension
Mime_Type_Info mimeType = null;
if (Global.Mime_Types.ContainsKey(extension.ToLower()))
{
mimeType = Global.Mime_Types[extension.ToLower()];
}
if ((mimeType != null) && (!mimeType.isBlocked))
{
// Since everything is valid, check the database
bool isDark;
short restrictions;
SobekCM_Database.Get_Item_Restrictions(bibID, vid, null, out isDark, out restrictions);
// If not DARK, and is restricted, check for access here
if ((!isDark) && (restrictions > 0))
{
// Does this user already have IP restriction mask determined?
// Determine which IP Ranges this IP address belongs to, if not already determined.
if (HttpContext.Current.Session["IP_Range_Membership"] == null)
{
int ip_mask = Global.IP_Restrictions.Restrictive_Range_Membership(request.UserHostAddress);
HttpContext.Current.Session["IP_Range_Membership"] = ip_mask;
}
int current_user_mask = Convert.ToInt32(HttpContext.Current.Session["IP_Range_Membership"]);
// Perform bitwise comparison
int comparison = restrictions & current_user_mask;
if (comparison == 0)
{
// If the user is Shibboleth authenticated, that is okay
User_Object possible_user = HttpContext.Current.Session["user"] as User_Object;
if ((possible_user == null) || (possible_user.Authentication_Type != User_Authentication_Type_Enum.Shibboleth))
{
isDark = true;
}
}
}
if (!isDark)
{
// Should this be forwarded for this mimetype?
if (mimeType.shouldForward)
{
StringBuilder forwardBuilder = new StringBuilder(SobekCM_Library_Settings.Image_URL + bibID.Substring(0, 2) + "/" + bibID.Substring(2, 2) + "/" + bibID.Substring(4, 2) + "/" + bibID.Substring(6, 2) + "/" + bibID.Substring(8) + "/" + vid + "/" + url_relative_list[4], 250);
for (int i = 5; i < url_relative_list.Count; i++)
{
forwardBuilder.Append("/" + url_relative_list[i]);
}
Response.Redirect(forwardBuilder.ToString());
}
else
{
Response.Clear();
Response.ContentType = mimeType.MIME_Type;
string filename = file_url;
if (File.Exists(filename))
{
using (FileStream sourceStream = File.OpenRead(filename))
{
sourceStream.CopyTo(Response.OutputStream, 32768);
}
}
Response.End();
}
}
else
{
Response.Clear();
Response.Output.WriteLine("RESTRICTED ITEM");
}
}
}
}
}
}
//public static async Task CopyToAsync(this Stream source, Stream destination)
//{
// int i = 0;
// var buffers = new [] { new byte[0x1000], new byte[0x1000] };
// Task writeTask = null;
// while(true)
// {
// var readTask = source.ReadAsync(buffers[i], 0, buffers[i].Length))>0;
// if (writeTask != null) await Task.WhenAll(readTask, writeTask);
// int bytesRead = await readTask;
// if (bytesRead == 0) break;
// writeTask = destination.WriteAsync(buffers[i], 0, bytesRead);
// i ^= 1; // swap buffers
// }
//}
}
