Proxy Server

Multi-threaded HTTP proxy server using Python socket programming.

Features

• Clients can send HTTP GET and POST requests to the proxy server which either sends requests to the destination IP or any local server.
• The proxy server caches upto three responses whose URL has been requested more than 3 times in 5 minutes.
• Certain domains are blacklisted. These are stored in CIDR format in the file proxy-server/proxy/blacklist.txt.
• Blacklisted domains can only be accessed by certain users using Basic Access Authentication.

Running the code

Proxy server

The proxy server runs on port 20100.

cd proxy-server
python3 main.py

To serve local files, run local servers in the port range 20101 to 20200:

cd server
python2 server.py 20101 20200

Client

Curl requests can be sent from any port in the range 20000-20099 to the proxy server at port 20100. Only HTTP requests are supported - not HTTPS.

To request a certain URL:

curl --proxy 127.0.0.1:20100 --local-port 20000-20099 <url>

To request blacklisted domains, username and password must be provided:

curl --proxy 127.0.0.1:20100 --local-port 20000-20099 -u username:password <url>

To retrieve any file using a local server:

curl --proxy localhost:20100 --local-port 20000-20099 -X GET localhost:10000/server.py