ASP stands for Active Server Pages. By using ASP built-in objects, we can get the information related to the web server, web pages in the web application etc. the built-in objects are categorized according to the information it contain.

Following are the built-in objects in cakePHP

•  Application
• Request
• Response
• Server
• Session

1. Application-

Application object is used to share information between all users of application. In application more then one user can use that method at a time, so there is lock and unlock method so that multiple users can not use a property at same time.

Methods in Application object:-

• Application.Contents.Remove- Used to delete an item from the application.
• Application.Contents.RemoveAll- Used to delete all items from the application.
• Application.Lock- Used so that unauthorized users can not make changes.
• Application.Unlock- Allows unauthorized users to make changes.

E.g of Application object:-

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<% 
Application.Lock 
Application("NumVisits") = Application("NumVisits") + 1 
Application.Unlock 
%>  
 
This application page has been visited  
<%= Application("NumVisits") %> times! 
 

<% 
Application.Lock 
Application("NumVisits") = Application("NumVisits") + 1 
Application.Unlock 
%>  

This application page has been visited  
<%= Application("NumVisits") %> times! 

2. Request Objects-

Used to get the data that was sent by the client browser to the server.

Method in Request objects:-

• Request.BinaryRead- Used to retrieve the data.
• Request.Form- Reads data sent by POST.
• Request.QueryString- Reads data sent by GET.

E.g of Request object:-

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<%
Response.Write "Welcome " & Server.HTMLEncode(Request.QueryString("name")) & "!"
%>

<%
Response.Write "Welcome " & Server.HTMLEncode(Request.QueryString("name")) & "!"
%>

3. Response Object-

Used to send information to the client.

Methods in Response objects:-

• Response.AddHeader- Used to set header
• Response.AppendToLog- Used to add data at the end of the web page.
• Response.BinaryWrite- Used to set information in the current HTTP output.
• Response.Clear- Used to erase the output.
• Response.End- Used to end the processing.

E.g of Response object:-

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<%
If Len(Request.QueryString("name")) > 0 Then
     Response.Cookies("name") = Request.QueryString("name") 
End If
 
Response.Write "Welcome " & Server.HTMLEncode(Response.Cookies("name")) & "!"
%>

<%
If Len(Request.QueryString("name")) > 0 Then
     Response.Cookies("name") = Request.QueryString("name") 
End If

Response.Write "Welcome " & Server.HTMLEncode(Response.Cookies("name")) & "!"
%>

4. Server Object-

Methods and properties on the server are accessed by Server object. It also allows connection to the database.

Methods in Server object:-

• Server.CreateObject- Used to create an instance of server component.
• Server.Execute- Used to execute .asp file.
• Server.HtmlEncode- Encode html code into specific string.
• Server.Transfer- Sends all current information to another .asp file for processing.
• Server.URLEncode- Apply URL encoding rules.

E.g of Server object:-

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<%
Dim oAdoCon, oAdoRec, oAdoStm, oCdoCon, oCdoMsg, oSciDic, oSciFsm, oMswAdr
 
Set oAdoCon = Server.CreateObject("ADODB.Connection")
Set oAdoRec = Server.CreateObject("ADODB.Recordset")
Set oAdoStm = Server.CreateObject("ADODB.Stream")
Set oCdoCon = Server.CreateObject("CDO.Configuration")
Set oCdoMsg = Server.CreateObject("CDO.Message")
Set oSciDic = Server.CreateObject("Scripting.Dictionary")
Set oSciFsm = Server.CreateObject("Scripting.FileSystemObject")
Set oMswAdr = Server.CreateObject("MSWC.AdRotator")
%>

<%
Dim oAdoCon, oAdoRec, oAdoStm, oCdoCon, oCdoMsg, oSciDic, oSciFsm, oMswAdr

Set oAdoCon = Server.CreateObject("ADODB.Connection")
Set oAdoRec = Server.CreateObject("ADODB.Recordset")
Set oAdoStm = Server.CreateObject("ADODB.Stream")
Set oCdoCon = Server.CreateObject("CDO.Configuration")
Set oCdoMsg = Server.CreateObject("CDO.Message")
Set oSciDic = Server.CreateObject("Scripting.Dictionary")
Set oSciFsm = Server.CreateObject("Scripting.FileSystemObject")
Set oMswAdr = Server.CreateObject("MSWC.AdRotator")
%>

5. Session Object-

Used to store information only needed for a particular visitor.

Methods in Session object:-

• Session.Abandon- Destroys session object and release it's resources.
• Session.Contents.Remove- Deletes an item.
• Session.Contents.RemoveAll- deletes all items.

E.g of Session object:-

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<%
If Len(Request.QueryString("name")) > 0 Then
     Session("name") = Request.QueryString("name") 
End If
 
Response.Write "Welcome " & Server.HTMLEncode(Session("name")) & "!"
%>

<%
If Len(Request.QueryString("name")) > 0 Then
     Session("name") = Request.QueryString("name") 
End If

Response.Write "Welcome " & Server.HTMLEncode(Session("name")) & "!"
%>