Best match gist redirection (no cache, no rate-limit protection)

server.py

#!/usr/bin/env python
from SimpleHTTPServer import SimpleHTTPRequestHandler
from SocketServer import TCPServer
from requests import get
from os import environ

cache = {}
user = environ.get('GITHUB_USERNAME','sebble')

def find(key):
    m = [x['id'] for x in cache if x['id'][:len(key)]==key]
    return m[0] if len(m) else None

def update():
    global cache
    cache = get('https://api.github.com/users/%s/gists?per_page=100'%user).json()

class MyRedirector(SimpleHTTPRequestHandler):
    def do_GET(self):
        global cache
        key = self.path.split('/')[1]
        gist = find(key)
        if gist is None:
            try:
                update()
                gist = find(key)
                if gist is None:
                    self.send_response(404)
                    self.end_headers()
                    return
            except:
                self.send_response(500)
                self.end_headers()
                return
        url = 'https://bl.ocks.org/%s/%s'%(user,gist)
        self.send_response(302)
        self.send_header('Location',url)
        self.end_headers()

TCPServer(('0.0.0.0', environ.get('PORT',8080)), MyRedirector).serve_forever()

# docker run --rm -it -v "$PWD/server.py:/server.py" -p 8081:8080 python:2-alpine sh -c 'pip install requests && /server.py'