75 lines
1.8 KiB
Python
75 lines
1.8 KiB
Python
import base64
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from imaplib import IMAP4
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from poplib import POP3
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from smtplib import SMTP
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import frappe
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class Oauth:
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def __init__(
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self,
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conn: IMAP4 | POP3 | SMTP,
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email_account: str,
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email: str,
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access_token: str,
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mechanism: str = "XOAUTH2",
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) -> None:
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self.email_account = email_account
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self.email = email
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self._mechanism = mechanism
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self._conn = conn
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self._access_token = access_token
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self._validate()
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def _validate(self) -> None:
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if not self._access_token:
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frappe.throw(
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frappe._("Please Authorize OAuth for Email Account {}").format(self.email_account),
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title=frappe._("OAuth Error"),
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)
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@property
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def _auth_string(self) -> str:
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return f"user={self.email}\1auth=Bearer {self._access_token}\1\1"
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def connect(self) -> None:
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try:
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if isinstance(self._conn, POP3):
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self._connect_pop()
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elif isinstance(self._conn, IMAP4):
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self._connect_imap()
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else:
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# SMTP
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self._connect_smtp()
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except Exception:
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frappe.log_error(
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"Email Connection Error - Authentication Failed",
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reference_doctype="Email Account",
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reference_name=self.email_account,
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)
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# raising a bare exception here as we have a lot of exception handling present
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# where the connect method is called from - hence just logging and raising.
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raise
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def _connect_pop(self) -> None:
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# NOTE: poplib doesn't have AUTH command implementation
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res = self._conn._shortcmd(
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"AUTH {} {}".format(
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self._mechanism, base64.b64encode(bytes(self._auth_string, "utf-8")).decode("utf-8")
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)
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)
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if not res.startswith(b"+OK"):
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raise
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def _connect_imap(self) -> None:
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self._conn.authenticate(self._mechanism, lambda x: self._auth_string)
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def _connect_smtp(self) -> None:
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self._conn.auth(self._mechanism, lambda x: self._auth_string, initial_response_ok=False)
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