p2pfs

A simple peer-to-peer file sharing system based on Python standard library xmlrpclib

Usage

0. Setup Test Environment

# Enable concurrency logging from different node to the same file
wget https://bootstrap.pypa.io/get-pip.py
python get-pip.py
pip install ConcurrentLogHandler

# Install fuser to free some port for testing
yum install psmisc
fuser -k 4242/tcp
fuser -k 4243/tcp

# Set up test environment
mkdir -p test/peer1
mkdir -p test/peer2
echo "Test string from peer2" >> test/peer2/test.txt

3. p2p through GUI client (Windows)

# Install wxPython on Windows and run the exe installer
# Change to shared directory with `pushd \\samba.<domainname>\scratch\<unixpath>`
python client.py test\urls.txt test\peer1 http://localhost:4242
python client.py test\urls.txt test\peer2 http://localhost:4243

You can fetch a file, or add a peer from GUI. A list of available file in current node will also be listed. See

2. p2p through CMD client

To launch a client, use python client.py $known_peer_urls_file $working_dir $url

Supported commands in client: fetch <filename>, hello <peer url> and exit

Additional step for testing setup

touch test/urls.txt

In the first console, start a client, which will in turn launch peer1

python client.py test/urls.txt test/peer1 http://localhost:4242
>fetch test.txt
Couldn't find the file test.txt
>

In the second console, start a client, which will in turn launch peer2

python client.py test/urls.txt test/peer2 http://localhost:4243
>fetch test.txt
>

Go back to peer1 and try to introduce itself to peer2 and fetch again

>hello http://localhost:4243
>fetch test.txt
>exit

Check the working directory of peer1, you can see test.txt is fecthed to test/peer1 now

1. p2p through Python interactive shell

General set up before starting server

yum install psmisc
fuser -k 4242/tcp
fuser -k 4243/tcp

mkdir -p test/peer1
mkdir -p test/peer2
echo "Test string from peer2" >> test/peer2/test.txt

In the first console, launch peer1

python node.py http://localhost:4242 test/peer1 secret1

In the second console, launch peer2

python node.py http://localhost:4243 test/peer2 secret2

In the third console, open an interactive Python shell

#Connect to peer1 and fail to retrieve data
from xmlrpclib import *
mypeer1 = ServerProxy('http://localhost:4242')
code, data = mypeer1.query('test.txt')

#Connect to peer2 and succeed in retrieving data
mypeer2 = ServerProxy('http://localhost:4243')
code, data = mypeer2.query('test.txt')

#Introduce peer2 to peer1 and succeed in retrieving data
mypeer1.hello('http://localhost:4243')
code, data = mypeer1.query('test.txt')

#Download test file from peer2 to peer1
mypeer1.fetch('test.txt', 'secret1')

XML RPC Barebone

Node1	Node2
`from SimpleXMLRPCServer import SimpleXMLRPCServer`	`from xmlrpclib import ServerProxy`
`s = SimpleXMLRPCServer(("", 4242))`	`s = ServerProxy('http://ikeblue3:4242')`
`def twice(x):`	`s.twice(4)`
`....return x*2`	Result: `8`
`s.register_function(twice)`
`s.serve_forever()`