87 lines
2.4 KiB
Python
87 lines
2.4 KiB
Python
"""读取日志文件末尾 N 行（v1.1.18）。
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按 level 过滤：默认 INFO+。适用于 RotatingFileHandler 落地的日志文件。
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"""
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from __future__ import annotations
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import os
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from pathlib import Path
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from util.runtime_paths import get_logs_dir
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DEFAULT_TAIL = 200
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_LEVEL_ORDER = {
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"DEBUG": 10, "INFO": 20, "WARNING": 30, "ERROR": 40, "CRITICAL": 50,
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}
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def _resolve_log_path() -> Path:
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"""解析日志文件路径。
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优先级：
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1. LOG_FILE env（绝对路径直接用，相对路径走 get_logs_dir()）
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2. 默认 get_logs_dir() / LOG_FILE_DEFAULT_NAME
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"""
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raw = os.environ.get("LOG_FILE", "")
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if raw:
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p = Path(raw)
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if not p.is_absolute():
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p = get_logs_dir() / raw
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return p
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from util.constants import LOG_FILE_DEFAULT_NAME
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return get_logs_dir() / LOG_FILE_DEFAULT_NAME
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def tail_log_file(tail: int = DEFAULT_TAIL, min_level: str = "INFO") -> dict:
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"""读日志文件末尾 tail 行，过滤 level >= min_level。
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Returns:
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{
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"log_file": str,
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"exists": bool,
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"total_lines": int,
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"returned_lines": int,
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"lines": [str, ...],
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"min_level": str,
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}
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"""
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log_path = _resolve_log_path()
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if not log_path.exists():
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return {
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"log_file": str(log_path),
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"exists": False,
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"total_lines": 0,
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"returned_lines": 0,
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"lines": [],
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"min_level": min_level,
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}
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text = log_path.read_text(encoding="utf-8", errors="replace")
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all_lines = text.splitlines()
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last_n = all_lines[-tail:] if tail > 0 else all_lines
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threshold = _LEVEL_ORDER.get(min_level.upper(), 20)
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filtered: list[str] = []
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for line in last_n:
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# 格式: "2026-09-15 12:34:56 [alert-contract-expiring-hr] INFO message"
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# 取第 4 个 token (INFO/DEBUG/...)
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parts = line.split()
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if len(parts) >= 4 and parts[1].count(":") >= 2 and parts[3] in _LEVEL_ORDER:
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line_level = parts[3]
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if _LEVEL_ORDER.get(line_level, 0) >= threshold:
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filtered.append(line)
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else:
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# 非标准行 / 解析不到 level：保留
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filtered.append(line)
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return {
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"log_file": str(log_path),
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"exists": True,
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"total_lines": len(all_lines),
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"returned_lines": len(filtered),
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"lines": filtered,
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"min_level": min_level,
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}
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