hashup uses file hashes to reduce bandwidth usage by skipping the upload of a large file if the file has been previously uploaded to the server. It uses HTML5 web workers to preserve UI performance, and HMAC's (hash-based message authentication codes) to preserve file security and prevent information leakage.
This project is primarily a proof-of-concept implementation. However, it should
be possible to reuse hashup.js and hashupWorker.js in any application,
regardless of whether a nodejs backend is available.
To run the current implementation:
node app.js
You should then be able to browse to the project.
Currently, I've implemented upload ticket issuance and client-side file hashing. However, I haven't yet implemented any of the actual file upload.
To see the current code at work, run the project and select a file to hash. Ticket and hash information will be display in your JavaScript console.
This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. To view a copy of this license, visit: http://creativecommons.org/licenses/by-nc-sa/3.0/
This is a proof-of-concept that may have security vulnerabilities and is not suitable for use in production environments.