ASP Programming

The browser makes a HTTP request; the server gives a HTTP response to the browser and the browser converts into a HTML page.

Shares information among users of an application. Gives a notification when an application starts or ends.

NOT, AND, OR, XOR, EQV, IMP

JavaScript

It’s a method by which web pages can be built and generally used for formatting and linking text.

It provides access to the physical file system of the web server. It gets and manipulates information about all drives in a server, folders and sub-folders on a drive and files inside a folder.

It lets you store and retrieve information in a flexible data structure. Each value or information stored in a Dictionary is associated with a key through which the information can be retrieved.

Cookies are text files that store information about the user by which the web server identifies and marks each different visitor to a web site and determines where a user has been before. A cookie can store information only when the user sends it. Individual cookies are limited to 4KB of data. The maximum number of cookies allowed is 300.

Cookies are stored on client’s machine.

Arrays are variables that store items of similar information. DIM ARRAY1(4) (declares an array with the name array1 with 5 elements)

A ClientCertificate is an encrypted number that is stored in a file on the user’s computer. These stores details of any security certificates included with the request.

A browser and a Web server

1) Global.asa

2) Server-side Includes

3) Jscript scripts tagged within

Static HTML Browser uses HTTP to request HTML file from the Web Server

Dynamic HTML Browser uses HTTP to request an executable application rather than a Static HTML file

SessionID returns the session identification number for each user.

Timeout sets the timeout period assigned to the Session object for any application, in minutes.

CodePage determines the code page that will be used to display content.

LCID a locale identifier, which determines time zone and language, rules for the system

Minimizes network traffic by limiting the need for the browser and server to talk to each other

Makes for quicker loading time since HTML pages are only downloaded

Allows to run programs in languages that are not supported by the browser

Can provide the client with data that does not reside on the client’s machine

Provides improved security measures since the script cannot be viewed by the browser

Request Object

Response Object

Server Object

Session Object

Application Object

Lock prevents clients from modifying the variables stored in the Application object.

Unlock removes the lock from variables stored in the Application object.

Internet Explorer (supports VBScript, JavaScript)

Netscape Communicator/ Navigator (supports only JavaScript, VBScript can be also added too)

Flush sends previous buffered output to the client immediately, but continues processing the script.

Clear erases any already-buffered HTML.

End causes the server to stop processing the script.

Contents collection contains all the variables established for a session without using the tag.

Static collection contains all the objects created