Twitter

Author: mrichman

ThirdParty/Twitter/.gitignore

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+Pipfile*
+package/**
+package.zip
+requirements.txt

ThirdParty/Twitter/README.md

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+# Twitter Bot
+
+automatically tweet on a schedule
+
+## Create Twitter Application
+
+More info here <https://developer.twitter.com/en/docs/basics/apps/overview>.
+
+Note the Consumer API keys and Access token & access token secret.
+
+```sh
+CONSUMER_KEY=...
+CONSUMER_SECRET=...
+ACCESS_TOKEN=...
+ACCESS_TOKEN_SECRET=...
+```
+
+## Create SSM Parameters
+
+Use the keys from the previous step:
+
+```sh
+aws ssm put-parameter --cli-input-json '{"Type": "SecureString", "KeyId": "alias/aws/ssm", "Name": "/TwitterBot/consumer_key", "Value": "'"$CONSUMER_KEY"'"}'
+
+aws ssm put-parameter --cli-input-json '{"Type": "SecureString", "KeyId": "alias/aws/ssm", "Name": "/TwitterBot/consumer_secret", "Value": "'"$CONSUMER_SECRET"'"}'
+
+aws ssm put-parameter --cli-input-json '{"Type": "SecureString", "KeyId": "alias/aws/ssm", "Name": "/TwitterBot/access_token", "Value": "'"$ACCESS_TOKEN"'"}'
+
+aws ssm put-parameter --cli-input-json '{"Type": "SecureString", "KeyId": "alias/aws/ssm", "Name": "/TwitterBot/access_token_secret", "Value": "'"$ACCESS_TOKEN_SECRET"'"}'
+```
+
+## Create an S3 bucket and upload the data file
+
+```sh
+aws s3 mb s3://123456789012-twitterbot
+aws s3 cp data.txt s3://123456789012-twitterbot
+```
+
+## Create IAM execution role for Lambda
+
+Grant access to your S3 bucket:
+
+```json
+{
+  "Version": "2012-10-17",
+  "Statement": [{
+    "Effect": "Allow",
+    "Action": [
+      "s3:GetObject"
+    ],
+    "Resource": "arn:aws:s3:::123456789012-twitterbot/*"
+  }]
+}
+```
+
+## Create deployment package
+
+Create a new virtual environment using `pipenv` and install the required libraries:
+
+```sh
+pipenv --python 3.7
+pipenv shell
+pipenv install tweepy
+mkdir package
+pipenv lock -r > requirements.txt
+pip install -r requirements.txt --no-deps -t package
+cd package
+zip -r9 ../package.zip .
+cd ..
+zip -g package.zip lambda_handler.py
+```
+
+<!--
+## Update Lambda funcion
+
+```sh
+aws lambda update-function-code --function-name TwitterBot --zip-file fileb://package.zip
+``` -->
+
+## Create Lambda function
+
+```sh
+aws lambda create-function \
+--function-name TwitterBot \
+--zip-file fileb://package.zip \
+--role arn:aws:iam::123456789012:role/LambdaTwitterBotRole \
+--handler lambda_function.lambda_handler \
+--runtime python3.7 \
+--environment Variables={BUCKET_NAME=123456789012-twitterbot}
+```
+
+## Create CloudWatch Scheduled Rule
+
+```sh
+aws events put-rule \
+--name TwitterBot \
+--schedule-expression 'rate(1 hour)'
+
+aws lambda add-permission \
+--function-name TwitterBot \
+--statement-id TwitterBot \
+--action 'lambda:InvokeFunction' \
+--principal events.amazonaws.com \
+--source-arn arn:aws:events:us-east-1:123456789012:rule/TwitterBot
+
+aws events put-targets --rule TwitterBot --targets file://targets.json
+```

ThirdParty/Twitter/data.txt

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+Once men turned their thinking over to machines in the hope that this would set them free. But that only permitted other men with machines to enslave them.
+Deep in the human unconscious is a pervasive need for a logical universe that makes sense. But the real universe is always one step beyond logic.
+The mystery of life isn't a problem to solve, but a reality to experience.
+What do you despise? By this are you truly known.
+There is no escape—we pay for the violence of our ancestors.
+Hope clouds observation.
+It is so shocking to find out how many people do not believe that they can learn, and how many more believe learning to be difficult.
+He who controls the spice controls the universe.
+Without change something sleeps inside us, and seldom awakens. The sleeper must awaken.
+The mind commands the body and it obeys. The mind orders itself and meets resistance.
+Whether a thought is spoken or not it is a real thing and it has power," Tuek said. "You might find the line between life and death among the Fremen to be too sharp and quick.
+Fear is the mind-killer.
+It is impossible to live in the past, difficult to live in the present and a waste to live in the future.
+Try looking into that place where you dare not look! You'll find me there, staring out at you!
+The people who can destroy a thing, they control it.
+Survival is the ability to swim in strange water.
+The Fremen were supreme in that quality the ancients called "spannungsbogen" -- which is the self-imposed delay between desire for a thing and the act of reaching out to grasp that thing.
+Arrakis teaches the attitude of the knife - chopping off what's incomplete and saying: 'Now, it's complete because it's ended here.'
+What has mood to do with it? You fight when the necessity arises—no matter the mood! Mood's a thing for cattle or making love or playing the baliset. It's not for fighting.
+Highly organized research is guaranteed to produce nothing new.
+Proper teaching is recognized with ease. You can know it without fail because it awakens within you that sensation which tells you this is something you have always known.
+The willow submits to the wind and prospers until one day it is many willows - a wall against the wind.
+"Give as few orders as possible," his father had told him once long ago. "Once you've given orders on a subject, you must always give orders on that subject."
+There should be a science of discontent. People need hard times to develop psychic muscles.
+Any road followed precisely to its end leads precisely nowhere. Climb the mountain just a little bit to test that it's a mountain. From the top of the mountain, you cannot see the mountain.

ThirdParty/Twitter/lambda_execution_role.json

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+{
+  "Version": "2012-10-17",
+  "Statement": [{
+    "Effect": "Allow",
+    "Action": [
+      "s3:GetObject"
+    ],
+    "Resource": "arn:aws:s3:::{bucket-name}/*"
+  }]
+}

ThirdParty/Twitter/lambda_handler.py

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+import os
+import random
+
+import boto3
+from botocore.exceptions import ClientError
+import tweepy
+
+BUCKET_NAME = os.environ['BUCKET_NAME']
+KEY = 'data.txt'
+
+s3 = boto3.resource('s3')
+ssm = boto3.client('ssm')
+
+
+def get_parameter(param_name):
+    response = ssm.get_parameter(Name=param_name, WithDecryption=True)
+    credentials = response['Parameter']['Value']
+    return credentials
+
+
+def get_tweet_text():
+    filename = '/tmp/' + KEY
+    try:
+        s3.Bucket(BUCKET_NAME).download_file(KEY, filename)
+    except ClientError as e:
+        if e.response['Error']['Code'] == "404":
+            print(f'The object {KEY} does not exist in bucket {BUCKET_NAME}.')
+        else:
+            raise
+
+    with open(filename) as f:
+        lines = f.readlines()
+        return random.choice(lines)
+
+
+def lambda_handler(event, context):
+
+    # Get SSM parameters
+    CONSUMER_KEY = get_parameter('/TwitterBot/consumer_key')
+    CONSUMER_SECRET = get_parameter('/TwitterBot/consumer_secret')
+    ACCESS_TOKEN = get_parameter('/TwitterBot/access_token')
+    ACCESS_TOKEN_SECRET = get_parameter('/TwitterBot/access_token_secret')
+
+    # Authenticate Tweepy
+    auth = tweepy.OAuthHandler(CONSUMER_KEY, CONSUMER_SECRET)
+    auth.set_access_token(ACCESS_TOKEN, ACCESS_TOKEN_SECRET)
+    api = tweepy.API(auth)
+
+    # Send tweet
+    tweet = get_tweet_text()
+    print(tweet)
+    api.update_status(tweet)

ThirdParty/Twitter/targets.json

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+[
+  {
+    "Id": "1",
+    "Arn": "arn:aws:lambda:us-east-1:123456789012:function:TwitterBot"
+  }
+]