88 lines
3.4 KiB
Python
88 lines
3.4 KiB
Python
# engine/lib/notify.py
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"""ctx.notify — Telegram notifications.
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The alert `instance` is the node's public host (APEX_NODE_HOST), passed in from the
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context. POSTs application/x-www-form-urlencoded via urllib (stdlib).
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"""
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from __future__ import annotations
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import html
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import urllib.parse
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import urllib.request
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from datetime import datetime
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NOTIFY_TIMEOUT = 20
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MAX_MESSAGE_LEN = 3500
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def resolve_bot_url(value: str) -> str:
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"""Resolve a literal URL or an @file reference without putting secrets in argv."""
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if not value or not value.startswith("@"):
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return value
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path = value[1:]
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if not path:
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raise ValueError("empty Telegram Bot URL file reference")
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with open(path, encoding="utf-8") as f:
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return f.read().strip()
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def build_text(title: str, message: str, node: str, level: str, ts: str) -> str:
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status, icon, severity = "firing", "🚨", "info"
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if level == "SUCCESS":
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status, icon = "resolved", "✅"
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elif level == "ERROR":
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severity = "critical"
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elif level == "WARN":
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severity = "warning"
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instance = node
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msg = message if len(message) <= MAX_MESSAGE_LEN else message[:MAX_MESSAGE_LEN] + "..."
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msg = html.escape(msg)
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safe_title = html.escape(title)
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return (f"{icon} <b>{safe_title}</b>\n"
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f"<b>Instance:</b> {instance}\n"
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f"<b>Timestamp:</b> {ts}\n"
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f"<b>Status:</b> {status.capitalize()}\n"
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f"<b>Escalation:</b> {severity}\n"
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f"<pre><code>{msg}</code></pre>\n"
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f"#status_{status} #escalation_{severity} #instance_{instance.replace('.', '_')}")
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class Notify:
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def __init__(self, log, node: str = "global"):
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self.log = log
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self.node = node
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def telegram(self, title, bot_url, message, node=None, level="INFO") -> bool:
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node = node or self.node
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try:
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bot_url = resolve_bot_url(bot_url)
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except (OSError, ValueError) as e:
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self.log.error(f"Failed to read Telegram Bot URL: {e}")
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return False
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if not bot_url:
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self.log.warn("Telegram Bot URL not provided. Skipping notification.")
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return False
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parsed = urllib.parse.urlparse(bot_url)
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if parsed.scheme != "https":
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self.log.error(f"Telegram Bot URL must use HTTPS, got scheme: {parsed.scheme!r}")
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return False
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ts = datetime.now().astimezone().strftime("%Y-%m-%d %H:%M:%S %Z")
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text = build_text(title, message, node, level, ts)
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data = urllib.parse.urlencode({"parse_mode": "HTML", "text": text}).encode()
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self.log.info(f"Sending Telegram notification ({level}): {title}")
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try:
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with urllib.request.urlopen(urllib.request.Request(bot_url, data=data), # noqa: S310 -- HTTPS validated above.
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timeout=NOTIFY_TIMEOUT) as r:
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r.read()
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return True
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except Exception as e:
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self.log.error(f"Failed to send Telegram notification: {e}")
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return False
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def success(self, title, url, msg, node=None): return self.telegram(title, url, msg, node, "SUCCESS")
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def error(self, title, url, msg, node=None): return self.telegram(title, url, msg, node, "ERROR")
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def info(self, title, url, msg, node=None): return self.telegram(title, url, msg, node, "INFO")
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def warn(self, title, url, msg, node=None): return self.telegram(title, url, msg, node, "WARN")
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