Proxy Server

A proxy acts as an intermediary agent between its clients and the servers which they want to access, performing functions directed towards a variety of purposes, like security, caching, etc, in its capacity as an intermediary. Specifically, caching HTTP Proxy Servers are intermediate servers, which maintain a cache of Internet objects like html files, image
files, etc which are obtained via HTTP.

A proxy server is a computer that offers a computer network service to allow clients to make indirect network connections to other network services. First, a client directly connects to the proxy server, and makes a request for a file or any other resource available on a different server. The requested resource is provided by the proxy server either from the cache or by fetching from the specified server. In some cases, the client's request or the server's response maybe altered by the proxy server> the purpose for this maybe for viewing websites that are banned in the network.

Features:
HTTP Request Sharing and Caching: The proxy server recieves the request from the user. It first checks it for passing the filtering criteria. The proxy server then first looks in its local cache of previously downloaded Web pages. If available in the cache, the page is displayed to the user without reaching for the server. If not present in the cache, the proxy server makes the request to the specified server acting as a client on behalf of the user and serves the page from the internet.

Blocking
a)URL Blocking
b)Client IP Blocking

Better response time
user response time will be improved for serving the pages that are frequently requested and are in the cache of the server.

project report
[attachment=8308]

Proxy Server
Submitted By:
Devshree Gehlot
Neelu Lakhani
BE Final CSE
MBM Engg. College

As the name indicates, a proxy server is one that acts like or provides the services of some other server.
-Using the proxy server, the clients can make indirect network connections to other network services.
-The project designs a proxy server which acts as a bridge between the server and the clients

Services offered
-Caching of web pages
-Auto log generation
-HTTP request sharing
-URL Blocking
-URL blocking
-Client IP Blocking

Context Flow Diagram
There are the user and the adminstrator ends in the context flow diagram. The users HTTP request is served by the server. The administrator can configure the URL's IP and determine which URLs to block. The administrator has the access to the servers log.

Functional Modules
The basic functional modules designed in this project include:
-Proxy User Interface
-Connection Manager
-Log Manager
-Proxy Server Listener
-Configuration

[attachment=8318]

can you send me the coding part and program interface part to my email - fruit_ooi10[at]yahoo.com. thank~

a caching proxy server that handles HTTP traffic is implemented. The major features of the proxy server are:
-A robust caching mechanism is included. It gives preference to the documents that must be loaded over the slowest internet links so that the users will have to wail for lesser amount of time. For achieving this, an estimate of the bandwidths of the ocal server and remote servers, connection times to remote servers etc are included.
-In order to allow the concurrent handling of several HTTP requests, multithreading feature is also included.
-The initialization and shut-down routines are strong so that the data can be recovered after a crash.
-a list of servers can be defined whose traffic will not be cached by the proxy.
-all unfulfilled requests will be forwarded to a proxy which can be specified.
-A graphical user interface that displays the log area, a pie chart of cache hit and misses. The proxy can be configured by the GUI.

The proxy server is implemented using java and is hence cross platform portable.

Get the source code here:
http://cs.technion.ac.il/Labs/Lccn/proje...oad%20area

also see:
http://planet-source-codevb/scripts/ShowCode.asp?txtCodeId=6762&lngWId=3