implemented leaky bucket, changed ip to identifier, added a bunch of documentation so the repo can serve as much of a journal entry as a collection of code. added a README in that effort too.

my_limiter/wsgi.py

@@ -1,7 +1,10 @@
 """
+TODO: implement token bucket
+  - [ ] in-app
+    - [x] in-memory
+    - [ ] redis
 TODO: implement leaky bucket
   - in-app
-    - [x] in-memory
     - [ ] redis
     - [ ] redis cluster
     - [ ] Flask middleware - https://flask.palletsprojects.com/en/2.1.x/quickstart/#hooking-in-wsgi-middleware
@@ -10,10 +13,13 @@ TODO: implement leaky bucket
   - [ ] AWS API Gateway
   - [ ] HAProxy Stick Tables  - https://www.haproxy.com/blog/introduction-to-haproxy-stick-tables
   - [ ] Cloudflare (Spectrum?)
+TODO: implement expiring tokens
 TODO: implement fixed window counter
 TODO: implement sliding window log
 TODO: implement sliding window counter 
-TODO: use session IDs instead of IP address
+TODO: use session IDs or API keys instead of IP address
+TODO: set headers appropriately in each case: https://www.ietf.org/archive/id/draft-polli-ratelimit-headers-02.html#name-ratelimit-headers-currently
+TODO: implement different rate limiting for each endpoint, using a `cost` variable for a given task
 """
 import flask as f