ross-humphrey

import boto3

def retrieve_public_url(s3_bucket_name, s3_file_name):
    """
    Given a s3 bucket name and key this method will figure out the location of the bucket
    and the respective url
    :param s3_bucket_name: S3 bucket name
    :param s3_file_name: S3 file name
    :return: formatted object URL giving publicly accessible URL for object (presuming permissions are set
    accordingly)

ross-humphrey

import base64
import boto3

def upload_base_64_to_s3(s3_bucket_name, s3_file_name, base_64_str):
    """
    Allows for the upload of a base64 string to a s3 object, may need fleshing out down the line, returns location
    of file in S3
    :param s3_bucket_name: S3 bucket name to push image to
    :param s3_file_name: File name
    :param base_64_str: base 64 string of the image to push to S3

ross-humphrey

Change the author information on historic git commits
> https://help.github.com/en/articles/changing-author-info

Change the commit date on historic git commits
> https://stackoverflow.com/questions/21112557/is-possible-change-the-commit-date-on-git?noredirect=1&lq=1

Change the date of most recent commit (before pushing)
GIT_COMMITTER_DATE="Mon 25 Nov 2019 20:19:19 GMT" git commit --amend --no-edit --date "Mon 25 Nov 2019 20:19:19 GMT"

Create New branch and checkout

ross-humphrey

import hashlib

def sha_3_hex_digest(input_string):
    """
    Given an input string a sha3 - 384 bit hex digest result
    :param input_string: string to hash
    :return: hexdigest string representation of input_string
    """
    encoded_input = input_string.encode("utf-8")
    return hashlib.sha3_384(encoded_input).hexdigest()

ross-humphrey

git filter-branch --env-filter \
  'if [ $GIT_COMMIT = 7e9f69cf5708ae32ac3f8f9211ee63b4efa7802e ]
  then
    export GIT_AUTHOR_DATE="Mon Sep 2 16:38:53 2019 -0000"
    export GIT_COMMITTER_DATE="Mon Sep 2 17:01:01 2019 -0000"
  fi'

ross-humphrey

aws lambda add-layer-version-permission --layer-name <insert_lambda_layer_name> --statement-id xaccount --action lambda:GetLayerVersion  --principal <insert_account_id_to_give_permissions_to> --version-number <insert_layer-version> --output text

ross-humphrey

https://medium.com/@matthewleak/aws-lambda-functions-with-a-static-ip-89a3ada0b471

ross-humphrey

# Windows script to set up Cognito Pool
# Handy guide for Server to Server credentials using Cognito @ https://lobster1234.github.io/2018/05/31/server-to-server-auth-with-amazon-cognito/
# CREATE COGNITO USER POOL

SET POOLNAME="PoolName"
SET ENV="DEV"
aws cognito-idp create-user-pool --pool-name %POOLNAME%%ENV%

# MANUAL STEP (FOR NOW - COPY THE ID FROM THE OUTPUT ABOVE)
# Take the UserPool->Id, everything below is created from it: eu-west-1_g*****

ross-humphrey

Book

• The Pragmatic Programmer

Programming Language:

• Javascript

General:

• Docker, Kubernetes and hosting the whole lot in AWS

ross-humphrey

import boto3

#boto3 client
ddb = boto3.client('dynamodb', endpoint_url='http://localhost:8000')
response = ddb.list_tables()
print(response)

#boto3 service resource
ddb = boto3.resource('dynamodb', endpoint_url='http://localhost:8000')
print(list(ddb.tables.all()))