Guillaume BOURGEOIS
84be770928
Gmail for one mailbox over OAuth 2.0 (no service account / delegation): auth-link + exchange-code to obtain a refresh token, connectivity test, message search/get, send/reply with attachments, attachment retrieval, and get_incidents ingestion with an OCSF mapper. Refresh-token grant, stdlib-only (no extra Python dependencies). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
116 lines
4.3 KiB
Python
116 lines
4.3 KiB
Python
import base64, json, os, sys, urllib.parse, urllib.request, urllib.error
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from email import encoders
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from email.mime.base import MIMEBase
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from email.mime.multipart import MIMEMultipart
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from email.mime.text import MIMEText
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TOKEN_URL = "https://oauth2.googleapis.com/token"
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API = "https://gmail.googleapis.com/gmail/v1/users/me"
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def _cfg():
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return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
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def _token():
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cfg = _cfg()
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refresh = str(cfg.get("refresh_token") or "")
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if not refresh:
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raise Exception("refresh_token is not set — run gmail-single-user-exchange-code and paste it into the config")
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data = urllib.parse.urlencode({
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"client_id": str(cfg.get("client_id") or ""),
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"client_secret": str(cfg.get("client_secret") or ""),
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"refresh_token": refresh,
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"grant_type": "refresh_token",
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}).encode("utf-8")
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req = urllib.request.Request(TOKEN_URL, data=data,
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headers={"Content-Type": "application/x-www-form-urlencoded", "Accept": "application/json"},
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method="POST")
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with urllib.request.urlopen(req, timeout=60) as r:
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tok = json.loads(r.read())
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if not tok.get("access_token"):
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raise Exception("Token refresh failed: " + json.dumps(tok))
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return tok["access_token"]
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def request(method, path, params=None, body=None):
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url = API + path
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q = {k: str(x) for k, x in (params or {}).items() if x not in (None, "")}
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if q:
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url += ("&" if "?" in url else "?") + urllib.parse.urlencode(q)
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data = json.dumps(body).encode("utf-8") if body is not None else None
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headers = {"Accept": "application/json", "Authorization": "Bearer " + _token()}
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if data is not None:
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headers["Content-Type"] = "application/json"
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req = urllib.request.Request(url, data=data, headers=headers, method=method)
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with urllib.request.urlopen(req, timeout=90) as r:
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raw = r.read()
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return json.loads(raw) if raw else {}
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def build_raw(cfg, inputs, in_reply_to=None, references=None):
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body = inputs.get("body")
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html = inputs.get("html_body")
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att_name = inputs.get("attachment_name")
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att_b64 = inputs.get("attachment_base64")
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has_att = bool(att_name and att_b64)
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def body_part():
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if body and html:
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alt = MIMEMultipart("alternative")
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alt.attach(MIMEText(body, "plain", "utf-8"))
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alt.attach(MIMEText(html, "html", "utf-8"))
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return alt
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if html:
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return MIMEText(html, "html", "utf-8")
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return MIMEText(body or "", "plain", "utf-8")
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if has_att:
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msg = MIMEMultipart("mixed")
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msg.attach(body_part())
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part = MIMEBase("application", "octet-stream")
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part.set_payload(base64.b64decode(att_b64))
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encoders.encode_base64(part)
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part.add_header("Content-Disposition", "attachment", filename=str(att_name))
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msg.attach(part)
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else:
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msg = body_part()
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msg["to"] = str(inputs.get("to") or "")
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if inputs.get("cc"):
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msg["cc"] = str(inputs["cc"])
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if inputs.get("bcc"):
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msg["bcc"] = str(inputs["bcc"])
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msg["subject"] = str(inputs.get("subject") or "")
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msg["from"] = str(cfg.get("send_as") or cfg.get("email") or "")
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if inputs.get("reply_to"):
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msg["reply-to"] = str(inputs["reply_to"])
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if in_reply_to:
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msg["In-Reply-To"] = str(in_reply_to)
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if references:
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msg["References"] = str(references)
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return base64.urlsafe_b64encode(msg.as_bytes()).decode("ascii")
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def main():
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cfg = _cfg()
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inputs = json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
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if not str(inputs.get("to") or ""):
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raise Exception("to is required")
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in_reply_to = str(inputs.get("in_reply_to") or "")
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if not in_reply_to:
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raise Exception("in_reply_to is required")
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references = str(inputs.get("references") or "") or in_reply_to
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raw = build_raw(cfg, inputs, in_reply_to=in_reply_to, references=references)
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print(json.dumps(request("POST", "/messages/send", body={"raw": raw})))
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try:
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main()
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except urllib.error.HTTPError as e:
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print(json.dumps({"error": "HTTP " + str(e.code), "detail": e.read().decode("utf-8", "replace")}))
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sys.exit(1)
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except Exception as e:
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print(json.dumps({"error": str(e)}))
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sys.exit(1)
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