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7 changed files with 1 additions and 306 deletions

129
.gitignore vendored
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# Byte-compiled / optimized / DLL files
__pycache__/
*.py[cod]
*$py.class
# C extensions
*.so
# Distribution / packaging
.Python
build/
develop-eggs/
dist/
downloads/
eggs/
.eggs/
lib/
lib64/
parts/
sdist/
var/
wheels/
pip-wheel-metadata/
share/python-wheels/
*.egg-info/
.installed.cfg
*.egg
MANIFEST
# PyInstaller
# Usually these files are written by a python script from a template
# before PyInstaller builds the exe, so as to inject date/other infos into it.
*.manifest
*.spec
# Installer logs
pip-log.txt
pip-delete-this-directory.txt
# Unit test / coverage reports
htmlcov/
.tox/
.nox/
.coverage
.coverage.*
.cache
nosetests.xml
coverage.xml
*.cover
*.py,cover
.hypothesis/
.pytest_cache/
# Translations
*.mo
*.pot
# Django stuff:
*.log
local_settings.py
db.sqlite3
db.sqlite3-journal
# Flask stuff:
instance/
.webassets-cache
# Scrapy stuff:
.scrapy
# Sphinx documentation
docs/_build/
# PyBuilder
target/
# Jupyter Notebook
.ipynb_checkpoints
# IPython
profile_default/
ipython_config.py
# pyenv
.python-version
# pipenv
# According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
# However, in case of collaboration, if having platform-specific dependencies or dependencies
# having no cross-platform support, pipenv may install dependencies that don't work, or not
# install all needed dependencies.
#Pipfile.lock
# PEP 582; used by e.g. github.com/David-OConnor/pyflow
__pypackages__/
# Celery stuff
celerybeat-schedule
celerybeat.pid
# SageMath parsed files
*.sage.py
# Environments
.env
.venv
env/
venv/
ENV/
env.bak/
venv.bak/
# Spyder project settings
.spyderproject
.spyproject
# Rope project settings
.ropeproject
# mkdocs documentation
/site
# mypy
.mypy_cache/
.dmypy.json
dmypy.json
# Pyre type checker
.pyre/

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# pull official base image
FROM python:3.9.6-alpine
# set work directory
WORKDIR /usr/src/app
# set environment variables
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1
# install dependencies
RUN pip install --upgrade pip
COPY ./requirements.txt .
RUN pip install -r requirements.txt
# add user
RUN adduser --disabled-password --gecos '' service
USER service
# copy project
COPY . .
ENTRYPOINT ["/usr/src/app/entrypoint.sh"]

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# influx-smtp-gateway
SMTP gateway accessible from InfluxDB for sending alerts.
# create .env file with following parameters
SMTP_SERVER_HOST = smtp.gmail.com
TO_MAIL = test111@mailinator.com
FROM_MAIL = test@gmail.com
FROM_MAIL_PASSWORD = test@123

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version: '3.8'
services:
smtp-gateway:
build: .
expose:
- "8081"
env_file:
- ./.env

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#!/bin/sh
python main.py

122
main.py
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#!/usr/bin/env python3
"""
SMTP webhook server
"""
import os
import json
import smtplib
import sys
import time
from email.header import Header
from email.mime.text import MIMEText
import cherrypy
import logging
logging.basicConfig(stream=sys.stdout,
format='%(name)s - %(levelname)s - %(message)s')
class SMTPWebhookApp:
"""
SMTP webhook server
"""
def _send_mail(self):
if not cherrypy.request.headers.get('Content-Length'):
logging.error("error: Invalid content length.")
return {"status": 400, "message": "Invalid content length."}
cl = cherrypy.request.headers['Content-Length']
rawbody = cherrypy.request.body.read(int(cl))
req_body = json.loads(rawbody)
if not req_body.get('subject') or req_body.get('subject') == '':
logging.error("error: body field is required.")
return {"status": 400, "message": "subject field is required."}
if not req_body.get('body') or req_body.get('body') == '':
logging.error("error: body field is required.")
return {"status": 400, "message": "body field is required."}
if not req_body.get('to_mail') or req_body.get('to_mail') == '':
logging.error("error: to_mail field is required.")
return {"status": 400, "message": "to_mail field is required."}
subject = req_body['subject']
body = req_body['body']
to_mail = req_body['to_mail']
try:
client = smtplib.SMTP(host=SMTP_SERVER_HOST, port=SMTP_SERVER_PORT)
except (smtplib.SMTPConnectionError, TimeoutError) as e:
time.sleep(0.2)
logging.error("To: {}, error: {}".format(to_mail, e))
return {"status": 400, "message": "SMTP client error: {}.".format(
e)}
msg = MIMEText(body, 'plain', 'utf-8')
msg['Subject'] = Header(subject, 'utf-8')
msg['From'] = FROM_MAIL
msg['To'] = to_mail
try:
client.ehlo()
client.starttls()
client.ehlo()
client.login(msg["From"], FROM_MAIL_PASSWORD)
client.sendmail(msg['From'], msg['To'], msg.as_string())
response = {"status": 200, "message": "mail sent successfully"}
logging.info("To: {}, mail sent successfully".format(to_mail))
except smtplib.SMTPException as e:
time.sleep(0.2)
logging.error("To: {}, error: {}".format(to_mail, e))
response = {"status": 500, "message": "some error: {}".format(e)}
finally:
client.quit()
return response
@cherrypy.expose
def send_mail(self):
"""
api endpoint for send mail
"""
data = self._send_mail()
cherrypy.response.status = data["status"]
cherrypy.response.headers["Content-Type"] = "application/json"
return json.dumps(data["status"]).encode()
ROOT = SMTPWebhookApp()
SMTP_SERVER_PORT = 587
CHERRYPY_SERVER_HOST = "0.0.0.0"
CHERRYPY_SERVER_PORT = 8081
if __name__ == "__main__":
try:
SMTP_SERVER_HOST = os.environ["SMTP_SERVER_HOST"]
FROM_MAIL = os.environ["FROM_MAIL"]
FROM_MAIL_PASSWORD = os.environ["FROM_MAIL_PASSWORD"]
except KeyError:
raise KeyError("Please check missing environment variables: "
"SMTP_SERVER_HOST, FROM_MAIL, "
"FROM_MAIL_PASSWORD")
cherrypy.server.socket_host = CHERRYPY_SERVER_HOST
cherrypy.server.socket_port = CHERRYPY_SERVER_PORT
ENGINE = cherrypy.engine
cherrypy.tree.mount(ROOT, config={})
if hasattr(ENGINE, "signal_handler"):
ENGINE.signal_handler.subscribe()
if hasattr(ENGINE, "console_control_handler"):
ENGINE.console_control_handler.subscribe()
try:
ENGINE.start()
except Exception: # pylint: disable=broad-except
sys.exit(1)
else:
ENGINE.block()

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cheroot==8.6.0
CherryPy==18.6.1
importlib-resources==5.4.0
jaraco.classes==3.2.1
jaraco.collections==3.5.1
jaraco.context==4.1.1
jaraco.functools==3.5.0
jaraco.text==3.7.0
more-itertools==8.12.0
portend==3.1.0
pytz==2021.3
six==1.16.0
tempora==5.0.1
zc.lockfile==2.0
zipp==3.7.0