Architecture
The proxy server architecture is divided into several modules as shown in the following diagram:
Proxy user interface
This module controls and manages the user interface and provides an easy to use graphical interface, window and a menu to the end user. This menu offers the following functionalities:
- Start proxy
- Stop proxy
- Exit
- Blocking URL
- Blocking client
- Manage log
- Manage cache
- Modify configuration
Proxy server listener
It is the port where new request from the client browser is listened. This module also performs blocking of clients from the list given by the user.
Connection Manager
It contains the main functionality of the proxy server. It performs the following functions:
- It contains the main functionality of the proxy server. It performs the following functions:
- Read request from header of the client.
- Parse the URL and determine whether the URL is blocked or not.
- Generate connection to the web server.
- Read the reply from the web server.
- If no copy of page is found in the cache then download the page from web server else will check its last modified date from the reply header and accordingly will read from the cache or server from the web.
- Then it will also check whether caching is allowed or not and accordingly will cache the page.
Cache Manager
This module is responsible for storing, deleting, clearing and searching of web pages in the cache.
Log Manager
This module is responsible for viewing, clearing and updating the logs.
Configuration
This module helps to create configuration settings which in turn let other modules to perform desired configurations such as caching.
