Protecting Content E.g Images?

Apr 14, 2010

I have images displayed in a website behind a username and password that is accessed by our customers. I have put in some simple measures to prevent users from copying these images. E.g placing an opaque image over the core image so that when users right click and save the image all they get is the opaque image.

I have concerns that customers could easily pass on their user credentials to competitors who can then freely view all the images.

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2. The content can come from a database , html file , XML file or stream as the case may be.

3. Home page of the web site lists the hyper links which navigates to the particular aspx page ( the document which is rendered dynamically as mentioned above).

4. Because the formatlayout is fixed and only the content changes , I don't want to create a separate aspx page for each document. Besides there are over 1000 such documents and will increase in future.

So I had created a page which receives document name in QueryString and renders the content for the particular document.

5. But the condition is that the document should open with unique name shown in the addressbar , like [URL] and it should also appear in google or any other serach results as [URL]

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Some examples of both:

[code]....

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Dec 27, 2010

i have encountered a problem on how to load the database images to be display in the Image content in the web pages. I am currently using an Access database with a table "Images" and there are 4 columns in it. "ImageID", "ImageDescription","ImageofPicture","Description". Below is my code: Words highlighted in bold is where the problem occurs. No image is display in the Image box but theres a red cross at the top left. Image description is displaying fine in the textboxes

int MaxRows = 0;
int inc = 0;
int inc1 = 1;
int inc2 = 2;
int inc3 = 3;
System.Data.OleDb.OleDbConnection cs;
System.Data.OleDb.OleDbDataAdapter dta;
DataSet ds1;
byte[] photo_array;
protected void Page_Load(object sender, EventArgs e)
{
cs = new System.Data.OleDb.OleDbConnection();
//tell the program where the database is located
cs.ConnectionString = "Provider=Microsoft.Jet.OleDb.4.0;Data Source=C:\Users\Admin\Desktop\Website1\App_Data\Database.mdb";
ds1 = new DataSet();
string sql = "SELECT * From Images ORDER BY ImageDescription ASC";
dta = new System.Data.OleDb.OleDbDataAdapter(sql, cs);
cs.Open();
dta.Fill(ds1, "Images");
Navigation();
//MaxRows equals to the total amount of records from the database
MaxRows = ds1.Tables["Images"].Rows.Count;
}
private void Navigation()
{
//get the first records from the database
DataRow dtaRow = ds1.Tables["Images"].Rows[inc];
//get column values in the row
TextBox3.Text = dtaRow.ItemArray.GetValue(1).ToString();
TextBox7.Text = dtaRow.ItemArray.GetValue(3).ToString();
DataRow dtaRow1 = ds1.Tables["Images"].Rows[inc1];
TextBox4.Text = dtaRow1.ItemArray.GetValue(1).ToString();
TextBox2.Text = dtaRow1.ItemArray.GetValue(3).ToString();
DataRow dtaRow2 = ds1.Tables["Images"].Rows[inc2];
TextBox5.Text = dtaRow2.ItemArray.GetValue(1).ToString();
TextBox8.Text = dtaRow2.ItemArray.GetValue(3).ToString();
DataRow dtaRow3 = ds1.Tables["Images"].Rows[inc3];
TextBox6.Text = dtaRow3.ItemArray.GetValue(1).ToString();
TextBox9.Text = dtaRow3.ItemArray.GetValue(3).ToString();
//if 3rd column value is not null
if (ds1.Tables[0].Rows[inc][2] != System.DBNull.Value)
{
Image5.ImageUrl = "ImageHandler.ashx?ImageDescription=" + TextBox3.Text;
}
if (ds1.Tables[0].Rows[inc1][2] != System.DBNull.Value)
{
Image5.ImageUrl = "ImageHandler.ashx?ImageDescription=" + TextBox4.Text;
}
if (ds1.Tables[0].Rows[inc2][2] != System.DBNull.Value)
{
Image5.ImageUrl = "ImageHandler.ashx?ImageDescription=" + TextBox5.Text;
}
if (ds1.Tables[0].Rows[inc3][2] != System.DBNull.Value)
{
Image5.ImageUrl = "ImageHandler.ashx?ImageDescription=" + TextBox6.Text;
}
}
}
Code for ImageHandler.ashx:
using System;
using System.Web;
using System.Data.OleDb;
public class ImageHandler : IHttpHandler {
public void ProcessRequest (HttpContext context) {
string qry = "SELECT ImageofPicture FROM Images WHERE ImageDescription = ?";
string connect = "Provider=Microsoft.Jet.OleDb.4.0;Data Source=C:\Users\Admin\Desktop\Website1\App_Data\Database.mdb";
using (OleDbConnection conn = new OleDbConnection(connect))
{
if (context.Request.QueryString["id"] != null)
{
OleDbCommand cmd = new OleDbCommand(qry, conn);
cmd.Parameters.AddWithValue("", context.Request.QueryString["id"]);
conn.Open();
using (OleDbDataReader rdr = cmd.ExecuteReader())
{
if (rdr.HasRows)
{
rdr.Read();
context.Response.ContentType = "image/jpeg";
context.Response.BinaryWrite((byte[])rdr["ImageofPicture"]);
}
}
}
}
}
public bool IsReusable {
get {
return false;
}

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I am thinking about the following...

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[Code]....

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[URL]

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[Code]....

Here is the code for the handler:

[Code]....

Here is the code for the .js file:

[Code]....

Here is the code for the page:

[Code]....

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[URL]

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[Code]....

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shop nvarchar(50),
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