Asoul

"""

Simple view decorator for flask and mongoengine/pymongo to auto-retry with delay on
pymongo.errors.AutoReconnect exception.

"""
from functools import wraps
import time
from pymongo.errors import AutoReconnect
import flask

Asoul

# Inspired from http://coding4streetcred.com/blog/post/Asymmetric-Encryption-Revisited-(in-PyCrypto)
# PyCrypto docs available at https://www.dlitz.net/software/pycrypto/api/2.6/

from Crypto import Random
from Crypto.PublicKey import RSA
import base64

def generate_keys():
	# RSA modulus length must be a multiple of 256 and >= 1024
	modulus_length = 256*4 # use larger value in production

Asoul

import flask
from flask import Flask

app = Flask(__name__)


@app.route("/")
def index():
    return "hello"

Asoul

class KMP:
    def partial(self, pattern):
        """ Calculate partial match table: String -> [Int]"""
        ret = [0]
        
        for i in range(1, len(pattern)):
            j = ret[i - 1]
            while j > 0 and pattern[j] != pattern[i]:
                j = ret[j - 1]
            ret.append(j + 1 if pattern[j] == pattern[i] else j)

Asoul

How to setup AWS lambda function to talk to the internet and VPC

I'm going to walk you through the steps for setting up a AWS Lambda to talk to the internet and a VPC. Let's dive in.

So it might be really unintuitive at first but lambda functions have three states.

1. No VPC, where it can talk openly to the web, but can't talk to any of your AWS services.
2. VPC, the default setting where the lambda function can talk to your AWS services but can't talk to the web.
3. VPC with NAT, The best of both worlds, AWS services and web.