如何隐藏/保护图像路径?

Request.Referrer

<img ID='ImageControl' 
     src='ShowImage.axd?Path=<% EncryptString("C:\Images\img.ext|" + DateTime.Now.ToString(), Page) %>' 

Dim pathAndTimeEnc As String = ctx.Request.Params("Path")
Dim pathAndTime As String
Dim path As String
Dim timeStamp As DateTime

pathAndTime = Common.DecryptString(pathAndTimeEnc, ctx)
Dim parts = pathAndTime.Split("|"C)
path = parts(0)
timeStamp = DateTime.Parse(parts(1))

Dim fiveMin As TimeSpan = New TimeStamp(0, 5, 0)
If DateTime.Now.Subtract(timeStamp) < fiveMin Then
  ' Return image.
End If

1. Response.Cache.SetCacheability(HttpCacheability.NoCache); Response.Cache.SetExpires(DateTime.Now);

wget

< img ID='ImageControl' src='ShowImage.axd?ID=1 %>'