from urllib.parse import parse_qs
-from turbot.rot import rot
from slack import WebClient
+import base64
import boto3
import requests
-import hashlib
-import hmac
+import json
+import pickle
+import os
+from types import SimpleNamespace
+from google.auth.transport.requests import Request
+from googleapiclient.discovery import build
+
+import turbot.interaction
+import turbot.events
ssm = boto3.client('ssm')
-response = ssm.get_parameter(Name='SLACK_SIGNING_SECRET', WithDecryption=True)
-slack_signing_secret = bytes(response['Parameter']['Value'], 'utf-8')
+# Note: Late import here to have the environment variable above available
+from turbot.slack import slack_is_valid_request # noqa
-response = ssm.get_parameter(Name='SLACK_BOT_TOKEN', WithDecryption=True)
-slack_bot_token = response['Parameter']['Value']
+if 'SLACK_BOT_TOKEN' in os.environ:
+ slack_bot_token = os.environ['SLACK_BOT_TOKEN']
+else:
+ response = ssm.get_parameter(Name='SLACK_BOT_TOKEN', WithDecryption=True)
+ slack_bot_token = response['Parameter']['Value']
+ os.environ['SLACK_BOT_TOKEN'] = slack_bot_token
slack_client = WebClient(slack_bot_token)
+if 'GSHEETS_PICKLE_BASE64' in os.environ:
+ gsheets_pick_base64 = os.environ['GSHEETS_PICKLE_BASE64']
+else:
+ response = ssm.get_parameter(Name='GSHEETS_PICKLE_BASE64',
+ WithDecryption=True)
+ gsheets_pickle_base64 = response['Parameter']['Value']
+ os.environ['GSHEETS_PICKLE_BASE64'] = gsheets_pickle_base64
+gsheets_pickle = base64.b64decode(gsheets_pickle_base64)
+gsheets_creds = pickle.loads(gsheets_pickle)
+
+if gsheets_creds:
+ if gsheets_creds.valid:
+ print("Loaded valid GSheets credentials from SSM")
+ else:
+ gsheets_creds.refresh(Request())
+ gsheets_pickle = pickle.dumps(gsheets_creds)
+ gsheets_pickle_base64_bytes = base64.b64encode(gsheets_pickle)
+ gsheets_pickle_base64 = gsheets_pickle_base64_bytes.decode('us-ascii')
+ print("Storing refreshed GSheets credentials into SSM")
+ os.environ['GSHEETS_PICKLE_BASE64'] = gsheets_pickle_base64
+ ssm.put_parameter(Name='GSHEETS_PICKLE_BASE64',
+ Type='SecureString',
+ Value=gsheets_pickle_base64,
+ Overwrite=True)
+service = build('sheets',
+ 'v4',
+ credentials=gsheets_creds,
+ cache_discovery=False)
+sheets = service.spreadsheets()
+service = build('drive',
+ 'v3',
+ credentials=gsheets_creds,
+ cache_discovery=False)
+files = service.files()
+permissions = service.permissions()
+
+db = boto3.resource('dynamodb')
+
+turb = SimpleNamespace()
+turb.slack_client = slack_client
+turb.db = db
+turb.table = db.Table("turbot")
+turb.sheets = sheets
+turb.files = files
+turb.permissions = permissions
+
def error(message):
"""Generate an error response for a Slack request
'body': ''
}
-def slack_is_valid_request(slack_signature, timestamp, body):
- """Returns True if the timestamp and body correspond to signature.
+def turbot_lambda(event, context):
+ """Top-level entry point for our lambda function.
+
+ This can handle either a REST API request from Slack, or an HTTP
+ request for teh Turbot web view
+ """
- This implements the Slack signature verification using the slack
- signing secret (obtained via an SSM parameter in code above)."""
+ # First, determine if we've been invoked by Slack, (by presence of
+ # the X-Slack-Signature header)
+ headers = requests.structures.CaseInsensitiveDict(event['headers'])
- content = "v0:{}:{}".format(timestamp,body).encode('utf-8')
+ if 'X-Slack-Signature' in headers:
+ return turbot_slack_handler(event, context)
- signature = 'v0=' + hmac.new(slack_signing_secret,
- content,
- hashlib.sha256).hexdigest()
+ # Otherwise, emit the Turbot web view
+ return turbot_web_view(event, context)
- if hmac.compare_digest(signature, slack_signature):
- return True
- else:
- print("Bad signature: {} != {}".format(signature, slack_signature))
- return False
+def turbot_web_view(event, context):
+ """Turbot web view
-def turbot_lambda(event, context):
- """Top-level entry point for our lambda function.
+ """
+
+ return {
+ 'statusCode': '200',
+ 'body': 'Hello, Lambda world.',
+ 'headers': {
+ 'Content-Type': 'application/text',
+ },
+ }
+
+def turbot_slack_handler(event, context):
+ """Primary entry point for all Slack-initiated API requests to Turbot
This function first verifies that the request actually came from
Slack, (by means of the SLACK_SIGNING_SECRET SSM parameter), and
refuses to do anything if not.
- Then this parses the request and arguments and farms out to
- supporting functions to implement all supported slash commands.
+ Then this defers to either turbot_event_handler or
+ turbot_slash_command to do any real work.
"""
- signature = event['headers']['X-Slack-Signature']
- timestamp = event['headers']['X-Slack-Request-Timestamp']
+ headers = requests.structures.CaseInsensitiveDict(event['headers'])
+
+ signature = headers['X-Slack-Signature']
+ timestamp = headers['X-Slack-Request-Timestamp']
if not slack_is_valid_request(signature, timestamp, event['body']):
return error("Invalid Slack signature")
+ # It's a bit cheesy, but we'll just use the content-type header to
+ # determine if we're being called from a Slack event or from a
+ # slash command or other interactivity. (The more typical way to
+ # do this would be to have different URLs for each Slack entry
+ # point, but it's simpler to have our Slack app implemented as a
+ # single AWS Lambda, (which can only have a single entry point).
+ content_type = headers['content-type']
+
+ if (content_type == "application/json"):
+ return turbot_event_handler(turb, event, context)
+ if (content_type == "application/x-www-form-urlencoded"):
+ return turbot_interactive_or_slash_command(turb, event, context)
+ return error("Unknown content-type: {}".format(content_type))
+
+def turbot_event_handler(turb, event, context):
+ """Handler for all subscribed Slack events"""
+
+ body = json.loads(event['body'])
+
+ type = body['type']
+
+ if type == 'url_verification':
+ return url_verification_handler(turb, body)
+ if type == 'event_callback':
+ return event_callback_handler(turb, body)
+ return error("Unknown event type: {}".format(type))
+
+def url_verification_handler(turb, body):
+
+ # First, we have to properly respond to url_verification
+ # challenges or else Slack won't let us configure our URL as an
+ # event handler.
+ challenge = body['challenge']
+
+ return {
+ 'statusCode': 200,
+ 'body': challenge
+ }
+
+def event_callback_handler(turb, body):
+ event = body['event']
+ type = event['type']
+
+ if type in turbot.events.events:
+ return turbot.events.events[type](turb, event)
+ return error("Unknown event type: {}".format(type))
+
+def turbot_interactive_or_slash_command(turb, event, context):
+ """Handler for Slack interactive things (buttons, shortcuts, etc.)
+ as well as slash commands.
+
+ This function simply makes a quick determination of what we're looking
+ at and then defers to either turbot_interactive or turbot_slash_command."""
+
+ # Both interactives and slash commands have a urlencoded body
body = parse_qs(event['body'])
- command = body['command'][0]
- args = body['text'][0]
- if (command == "/rotlambda" or command == "/rot"):
- return rot_slash_command(body, args)
+ # The difference is that an interactive thingy has a 'payload'
+ # while a slash command has a 'command'
+ if 'payload' in body:
+ return turbot_interactive(turb, json.loads(body['payload'][0]))
+ if 'command' in body:
+ return turbot_slash_command(turb, body)
+ return error("Unrecognized event (neither interactive nor slash command)")
- return error("Command {} not implemented".format(command))
+def turbot_interactive(turb, payload):
+ """Handler for Slack interactive requests
+
+ These are the things that come from a user interacting with a button
+ a shortcut or some other interactive element that our app has made
+ available to the user."""
-def rot_slash_command(body, args):
- """Implementation of the /rot command
+ type = payload['type']
- The args string should be as follows:
+ if type == 'block_actions':
+ return turbot_block_action(turb, payload)
+ if type == 'view_submission':
+ return turbot.interaction.view_submission(turb, payload)
+ if type == 'shortcut':
+ return turbot_shortcut(turb, payload)
+ return error("Unrecognized interactive type: {}".format(type))
- [count|*] String to be rotated
+def turbot_block_action(turb, payload):
+ """Handler for Slack interactive block actions
- That is, the first word of the string is an optional number (or
- the character '*'). If this is a number it indicates an amount to
- rotate each character in the string. If the count is '*' or is not
- present, then the string will be rotated through all possible 25
- values.
+ Specifically, those that have a payload type of 'block_actions'"""
- The result of the rotation is returned (with Slack formatting) in
- the body of the response so that Slack will provide it as a reply
- to the user who submitted the slash command."""
+ actions = payload['actions']
- channel_name = body['channel_name'][0]
- response_url = body['response_url'][0]
- channel_id = body['channel_id'][0]
+ if len(actions) != 1:
+ return error("No support for multiple actions ({}) in a single request"
+ .format(len(actions)))
- result = rot(args)
+ action = actions[0]
- if (channel_name == "directmessage"):
- requests.post(response_url,
- json = {"text": result},
- headers = {"Content-type": "application/json"})
+ atype = action['type']
+ if 'value' in action:
+ avalue = action['value']
else:
- slack_client.chat_postMessage(channel=channel_id, text=result)
+ avalue = '*'
- return {
- 'statusCode': 200,
- 'body': ""
- }
+ if (
+ atype in turbot.interaction.actions
+ and avalue in turbot.interaction.actions[atype]
+ ):
+ return turbot.interaction.actions[atype][avalue](turb, payload)
+ return error("Unknown action of type/value: {}/{}".format(atype, avalue))
+
+def turbot_shortcut(turb, payload):
+ """Handler for Slack shortcuts
+
+ These are invoked as either global or message shortcuts by a user."""
+
+ print("In turbot_shortcut, payload is: {}".format(str(payload)))
+
+ return error("Shortcut interactions not yet implemented")
+
+def turbot_slash_command(turb, body):
+ """Implementation for Slack slash commands.
+
+ This parses the request and arguments and farms out to
+ supporting functions to implement all supported slash commands.
+ """
+
+ command = body['command'][0]
+ if 'text' in body:
+ args = body['text'][0]
+ else:
+ args = ''
+
+ if command in turbot.interaction.commands:
+ return turbot.interaction.commands[command](turb, body, args)
+
+ return error("Command {} not implemented".format(command))
projects / turbot / blobdiff