Diffy

Lucille Hua Diﬀy – a version control system on the web
It’s time for a new web

- Lucille Hua

A little bit about myself
•  School, major
•  Work
•  McHacks

Starbucks door

The design of everyday things

The web

Internet trafCic
Popular JS Libraries/Frameworks Popular JS Compilers/Bundlers

What is Diffy?
A version control system on the web

Diffy :: inspirations
Video Git version control

Diffy :: inspirations
•  IPFS (InterPlanetary File System) is The Permanent Web
•  A new peer-to-peer hypermedia protocol
•  Content-addressed hyperlinks

hKps://ipfs.io/ipfs/QmTkzDwWqPbnAh5YiV5VwcTLnGdwSNsNTn2aDxdXBFca7D

Diffy :: inspiration :: current web
cache cache cache
mutable
hKp://www.lucilleh.com <html>…</html>
Caching is done in browsers, proxies, intermediate nodes, server, etc.

Diffy :: inspirations :: IPFS
mutable
hKp://www.lucilleh.com <html>…</html>
immutable
hKps://ipfs.io/ipfs/
QmTkzDwWqPbnAh5YiV5
VwcTLnGdwSNsNTn2aDxd
XBFca7D
<html>…</html>
No more 404!

Diffy :: inspirations :: IPFS
Photo credits:
hKps://ipfs.io/ipfs/QmNhFJjGcMPqpuYfxL62VVB9528NXqDNMFXiqN5bgFYiZ1/its-
eme-for-the-permanent-web.html

Diffy :: spec :: headers & content

Request headers
“base-hash” : QmerMMWdGAd4qP1vmTMWhBSMzsD3rkFJtSVqe2dxe58wq4
“target-hash” : QmbjfgkGvmEHUwgs674HQ718r9JD9paLG3CFkJF3Ud9qjq

Request headers

Response headers
“master-hash” : QmbjfgkGvmEHUwgs674HQ718r9JD9paLG3CFkJF3Ud9qjq

Request headers

Response headers
“master-hash” : QmbjfgkGvmEHUwgs674HQ718r9JD9paLG3CFkJF3Ud9qjq

Response body
Index: test
================================================================
--- test
+++ test
@@ -16,5 +16,5 @@
-hello world
+how are you

Diffy :: spec :: url
http://www.lucilleh.com

http://ipfs.io/ipfs/QmNhFJjGcMPqpuYfxL62VVB9528NXqDNMFXiqN5bgFYiZ1

http://www.lucilleh.com?hash=66453e2

Diffy :: Demo time!

Design choices :: server requirements
•  Unique hash that points to a specific version of a file
•  Every file update generates new hash
•  File under one hash is immutable

Design choices :: Diffy architecture

Overview
•  Starbuck’s Bad doors
•  404 page not found
•  Internet traﬃc, proxy with mutable content
•  Videos
•  Git
•  IPFS
•  Diﬀy

Diffy
Github:
hKps://github.com/LucilleH/diﬀy

Diffy

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