hankin
423baff73b
- Docker bridge 网络隔离（8000 端口封死） - Gunicorn 4 Worker 多进程 - Alembic 数据库迁移基线 - 日志轮转 20m×3 - JWT 密钥 + DB 密码 + CORS 收紧 - 3-2-1 备份链路（NAS + R740-B 冷备） - 连接池 pool_pre_ping + pool_recycle=3600
53 lines
1.5 KiB
Python
53 lines
1.5 KiB
Python
# Copyright (C) 2016-present the ayncpg authors and contributors
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# <see AUTHORS file>
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#
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# This module is part of asyncpg and is released under
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# the Apache 2.0 License: http://www.apache.org/licenses/LICENSE-2.0
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import re
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def _quote_ident(ident):
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return '"{}"'.format(ident.replace('"', '""'))
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def _quote_literal(string):
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return "'{}'".format(string.replace("'", "''"))
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async def _mogrify(conn, query, args):
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"""Safely inline arguments to query text."""
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# Introspect the target query for argument types and
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# build a list of safely-quoted fully-qualified type names.
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ps = await conn.prepare(query)
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paramtypes = []
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for t in ps.get_parameters():
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if t.name.endswith('[]'):
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pname = '_' + t.name[:-2]
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else:
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pname = t.name
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paramtypes.append('{}.{}'.format(
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_quote_ident(t.schema), _quote_ident(pname)))
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del ps
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# Use Postgres to convert arguments to text representation
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# by casting each value to text.
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cols = ['quote_literal(${}::{}::text)'.format(i, t)
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for i, t in enumerate(paramtypes, start=1)]
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textified = await conn.fetchrow(
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'SELECT {cols}'.format(cols=', '.join(cols)), *args)
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# Finally, replace $n references with text values.
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return re.sub(
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r"\$(\d+)\b",
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lambda m: (
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textified[int(m.group(1)) - 1]
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if textified[int(m.group(1)) - 1] is not None
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else "NULL"
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),
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query,
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)
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