74 lines
2.3 KiB
Python
74 lines
2.3 KiB
Python
"""Oracle 11.2 thick 连接。环境变量与 rpa_oms 相同。"""
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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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_client_ready = False
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_PROJECT_ROOT = Path(__file__).resolve().parent
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_OMS_ENV = _PROJECT_ROOT.parent / "rpa_oms" / ".env"
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class RepoUnavailable(Exception):
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def __init__(self, message: str = "数据库不可用"):
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self.message = message
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super().__init__(message)
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def load_runtime_env(paths: list[Path] | None = None) -> None:
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"""先读合同 .env，空缺再补 rpa_oms/.env。不覆盖已有非空环境变量。"""
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env_paths = paths if paths is not None else [_PROJECT_ROOT / ".env", _OMS_ENV]
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for path in env_paths:
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_fill_env(path)
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def _fill_env(path: Path) -> None:
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if not path.is_file():
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return
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for raw in path.read_text(encoding="utf-8").splitlines():
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line = raw.strip()
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if not line or line.startswith("#") or "=" not in line:
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continue
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key, _, value = line.partition("=")
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key = key.strip()
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value = value.strip()
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if len(value) >= 2 and value[0] == value[-1] and value[0] in {'"', "'"}:
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value = value[1:-1]
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if not key or not value:
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continue
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current = os.environ.get(key, "")
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if not current:
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os.environ[key] = value
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def oracle_dsn() -> tuple[str, str, str]:
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user = os.getenv("RPA_ORACLE_USER", "")
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password = os.getenv("RPA_ORACLE_PASSWORD", "")
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host = os.getenv("RPA_ORACLE_HOST", "")
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if not user or not password or not host:
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raise RepoUnavailable("未配置 RPA_ORACLE_HOST / RPA_ORACLE_USER / RPA_ORACLE_PASSWORD")
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port = os.getenv("RPA_ORACLE_PORT", "1521")
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service = os.getenv("RPA_ORACLE_SERVICE", "rpa")
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return user, password, f"{host}:{port}/{service}"
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def connect_from_env():
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user, password, dsn = oracle_dsn()
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_ensure_client()
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import oracledb
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return oracledb.connect(user=user, password=password, dsn=dsn)
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def _ensure_client() -> None:
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global _client_ready
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if _client_ready:
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return
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import oracledb
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if os.getenv("RPA_ORACLE_THICK", "1") == "1":
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lib_dir = os.getenv("RPA_ORACLE_CLIENT_LIB", "")
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kwargs = {"lib_dir": lib_dir} if lib_dir else {}
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oracledb.init_oracle_client(**kwargs)
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_client_ready = True
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