swapnil-warke / nodesock

P2P filesharing

#Introduction A simple file sharing program written in node

#Usage

1. First run the server node server.js
2. Now, the client has two modes

• Interactive mode: node client.js
• Bulk Uploader: node client.js <json_file>

#Dependencies

• Node
• sqlite3

#Design Decisions

• Multiple Clients: Nodejs has been specifically used because of this reason, since nodejs handles everything asynchronously in an event loop, it has the ideal environment for a network application.

• Multiple Requests: Each connection to the server serves as a closure; in essence, every connection is handled independent of other clients. Each request is handled inside this connection object.

• Database: sqlite has been used for the database as it does not need additional installations and only requires a node module. A simple file can serve as a sqlite database.

• Filepath: Filepaths are resolved before sending them to the server, invalid paths are signalled as an error.

• P2P: Every client has a listener at FILEPORT, whenever it recieves a request to share a file, it sends the entire file to peer asking for it.

• Command Structure: <COMMAND>;;parameter1;;parameter2..

• ;; has been chosen as the delimiter arbitarily

• <NEWUSER>

• <OLDUSER>

• <SEARCH>

• <UPLOAD>

• <RESULTS>

• <UPLOADED>

• <REGISTERED>

#Limitations

• All p2p transferred files are written to a single file called recieved. Which is overwritten every time.