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