26 lines
682 B
Python
26 lines
682 B
Python
"""洋葱组装(D1): 把中间件序列外→内绑定到终端调用上。"""
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from __future__ import annotations
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from collections.abc import Sequence
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from polygateway.ports import CallNext, Middleware
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def compose(middlewares: Sequence[Middleware], terminal: CallNext) -> CallNext:
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"""外→内绑定: compose([A, B], t) 的调用序为 A → B → t。"""
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handler = terminal
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for mw in reversed(middlewares):
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handler = _bind(mw, handler)
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return handler
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def _bind(mw: Middleware, nxt: CallNext) -> CallNext:
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async def call(request):
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return await mw(request, nxt)
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return call
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