Centralised Peer to Peer System

Requirements:

• Linux system with python installed.
• Python version should be equal or greater than 2.6.
• You can check this just be typing python in the terminal (assuming python is already installed).

Note: Please refer to the design document for detailed explaination of the architecture.

---

Package:

There are two main components in the packege:

1. Indexing Server (indexing_server.py)
2. Peer (peer)

Indexing Server:

• Manages peer registration.
• Manages file index.
• Manages Client requests for searching index.
• Manages Peer list in the network that are connected to the server.

Peer:

Peer has three sub components components:

1. Peer (peer.py)

• Serves as client for users using the peer.
• Gives option for Listing and Searching files from the Central Indexing Server.
• Initiates connection to Central server and registers to the network.
• Starts the peer server which will serve other peers (This is Daemonized).
• Starts the file system handler, which updates Central Server about the files it has.
• Initates file transfer upon client request.

2. File System EventHandler (FilesystemEventHandler.py)

• This is a daemon thread that is spawned by the peer thread.
• This constantly monitors the allocated directory for file updates (Addtion and Deletion).
• Upon any such event, it automatically updates the changes to the Central Indexing server.

3. Peer Server (server.py)

• This is also a daemon server, this runs on the port which the Central Server allocates.
• This will listen to any peer requests and initiates file transfer.

---

Note: The 'Files' folder inside directory is used as the input and outpu directory for file transfer. So, please use this directory to place your test files.

---

======================================================================================================= Usage:

Steps to start the file transfer process:

1. Start the Central Indexing Server.

   python indexing_server.py

2. Depending on the requirement, open n number of terminals (here n = 3).

3. Depending on the number of peers, go into the peer(x) directory using terminal (x = 1,2,3).

4. Place all the initial files into the 'Files' directory.

5. Launch peers inside the peer directory.

   python peer.py

6. Follow the promts in the terminal.

---