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# ------------------ | ||
# Only for running this script here | ||
import asyncio | ||
import logging | ||
import sys | ||
from os.path import dirname | ||
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sys.path.insert(1, f"{dirname(__file__)}/../../..") | ||
logging.basicConfig(level=logging.DEBUG) | ||
# ------------------ | ||
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# --------------------- | ||
# Flask App | ||
# --------------------- | ||
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# pip3 install flask | ||
from flask import Flask, make_response | ||
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app = Flask(__name__) | ||
logger = logging.getLogger(__name__) | ||
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import os | ||
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from slack import WebClient | ||
from slack.errors import SlackApiError | ||
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singleton_client = WebClient(token=os.environ["SLACK_BOT_TOKEN"], run_async=False) | ||
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singleton_loop = asyncio.new_event_loop() | ||
singleton_async_client = WebClient( | ||
token=os.environ["SLACK_BOT_TOKEN"], | ||
run_async=True, | ||
loop=singleton_loop | ||
) | ||
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@app.route("/sync/singleton", methods=["GET"]) | ||
def singleton(): | ||
try: | ||
response = singleton_client.chat_postMessage( | ||
channel="#random", | ||
text="You used the singleton WebClient for posting this message!" | ||
) | ||
return str(response) | ||
except SlackApiError as e: | ||
return make_response(str(e), 400) | ||
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@app.route("/sync/per-request", methods=["GET"]) | ||
def per_request(): | ||
try: | ||
client = WebClient( | ||
token=os.environ["SLACK_BOT_TOKEN"], | ||
run_async=False | ||
) | ||
response = client.chat_postMessage( | ||
channel="#random", | ||
text="You used a new WebClient for posting this message!" | ||
) | ||
return str(response) | ||
except SlackApiError as e: | ||
return make_response(str(e), 400) | ||
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# This doesn't work | ||
@app.route("/async/singleton", methods=["GET"]) | ||
def singleton_async(): | ||
try: | ||
future = singleton_async_client.chat_postMessage( | ||
channel="#random", | ||
text="You used the singleton WebClient for posting this message!" | ||
) | ||
# blocking here!!! | ||
# as described at https://github.com/slackapi/python-slackclient/issues/497 | ||
# until this completion, other simultaneous requests get "RuntimeError: This event loop is already running" | ||
response = singleton_loop.run_until_complete(future) | ||
return str(response) | ||
except SlackApiError as e: | ||
return make_response(str(e), 400) | ||
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@app.route("/async/per-request", methods=["GET"]) | ||
def per_request_async(): | ||
try: | ||
# This is not optimal and the host should have a large number of FD (File Descriptor) | ||
loop_for_this_request = asyncio.new_event_loop() | ||
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async_client = WebClient( | ||
token=os.environ["SLACK_BOT_TOKEN"], | ||
run_async=True, | ||
loop=loop_for_this_request | ||
) | ||
future = async_client.chat_postMessage( | ||
channel="#random", | ||
text="You used the singleton WebClient for posting this message!" | ||
) | ||
response = loop_for_this_request.run_until_complete(future) | ||
return str(response) | ||
except SlackApiError as e: | ||
return make_response(str(e), 400) | ||
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if __name__ == "__main__": | ||
# export FLASK_ENV=development | ||
# python3 integration_tests/samples/issues/issue_497.py | ||
app.run(debug=True, host="localhost", port=3000) |