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The Kademlia DHT in Javascript for Node.js and Browsers
KadOH - Javascript P2P framework
KadOH is a framework to build P2P applications for browsers and node.js. By implementing the basis of the Kademlia DHT, KadOH lets you build distributed web applications for mobile and desktop devices. With its flexible and extensible design, you can easily adapt KadOH to fit your needs. KadOH is available under the MIT License.
KadOH abstract many different transport protocols to provide P2P connections. In the browser we support XMPP over Bosh and Socket.io shipped with a node.js router, and you can go for UDP and native XMPP in a node.js application. We plan to support WebRTC soon !
See the wiki for more informations ! Also take look at our report and be aware that this document may be outdated.
Acknowledgments — We would like to thank Dr. Tudor Dumitraş, who gave us the honor to work with him during our project and always made available his support.
Alexandre Lachèze and Pierre Guilleminot
See it in action
Live demo based on XMPP transport running on Amazon EC2.
Run it yourself
First you can start a little DHT based on UDP transport using this command :
bin/dht udp.default
Then in an other terminal, start the web-based debug UI using the following Jake command and go to localhost:8080
:
jake run:udp
See the wiki for more informations on how to launch your own DHT from scratch and on different environments.
Installation
Install KadOH
The only required dependency is node.js (version >= 0.6, but you clould try below..). Take a look at the official manual to install node on your system.
Then run :
npm install kadoh
# or: git clone https://github.com/jinroh/kadoh.git
cd kadoh
npm install
You may also want to install the Jake module globally :
npm install -g jake
For Linux users, if the installation of KadOH's dependencies fails, you may need to install the libexpat-dev
package. For Ubuntu/Debian users, run the following command :
sudo apt-get install libexpat-dev
Build and go
Browser
To build the source inside the dist
folder run one of the following Jake command :
jake build
This will build two versions of KadOH supporting different transports :
- SimUDP using Socket.io
- XMPP using Strophe.js for XMPP over Bosh
Node.js
If you need to use KadOH in a node.js application, just add kadoh
in your package dependencies and use :
var kadoh = require('kadoh');
Thanks
KadOH is built on top of many open-source libraries and projects:
Tests
For the moment, tests are not running anymore.. But we hope that will be fixed as soon as we migrate to Mocha.
jake test:node
jake test:browser