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118 lines
2.5 KiB
Markdown
118 lines
2.5 KiB
Markdown
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---
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sidebar_position: 2
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description: nonebot.message 模块
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---
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# nonebot.message
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本模块定义了事件处理主要流程。
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NoneBot 内部处理并按优先级分发事件给所有事件响应器，提供了多个插槽以进行事件的预处理等。
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## _def_ `event_preprocessor(func)` {#event-preprocessor}
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- **说明**
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事件预处理。
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装饰一个函数，使它在每次接收到事件并分发给各响应器之前执行。
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- **参数**
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- `func` ([T_EventPreProcessor](typing.md#T-EventPreProcessor))
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- **返回**
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- [T_EventPreProcessor](typing.md#T-EventPreProcessor)
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## _def_ `event_postprocessor(func)` {#event-postprocessor}
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- **说明**
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事件后处理。
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装饰一个函数，使它在每次接收到事件并分发给各响应器之后执行。
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- **参数**
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- `func` ([T_EventPostProcessor](typing.md#T-EventPostProcessor))
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- **返回**
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- [T_EventPostProcessor](typing.md#T-EventPostProcessor)
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## _def_ `run_preprocessor(func)` {#run-preprocessor}
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- **说明**
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运行预处理。
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装饰一个函数，使它在每次事件响应器运行前执行。
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- **参数**
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- `func` ([T_RunPreProcessor](typing.md#T-RunPreProcessor))
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- **返回**
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- [T_RunPreProcessor](typing.md#T-RunPreProcessor)
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## _def_ `run_postprocessor(func)` {#run-postprocessor}
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- **说明**
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运行后处理。
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装饰一个函数，使它在每次事件响应器运行后执行。
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- **参数**
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- `func` ([T_RunPostProcessor](typing.md#T-RunPostProcessor))
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- **返回**
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- [T_RunPostProcessor](typing.md#T-RunPostProcessor)
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## _async def_ `check_and_run_matcher(Matcher, bot, event, state, stack=None, dependency_cache=None)` {#check-and-run-matcher}
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- **说明:** 检查并运行事件响应器。
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- **参数**
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- `Matcher` (type[[Matcher](matcher.md#Matcher)]): 事件响应器
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- `bot` ([Bot](adapters/index.md#Bot)): Bot 对象
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- `event` ([Event](adapters/index.md#Event)): Event 对象
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- `state` ([T_State](typing.md#T-State)): 会话状态
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- `stack` (AsyncExitStack | None): 异步上下文栈
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- `dependency_cache` ([T_DependencyCache](typing.md#T-DependencyCache) | None): 依赖缓存
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- **返回**
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- None
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## _async def_ `handle_event(bot, event)` {#handle-event}
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- **说明:** 处理一个事件。调用该函数以实现分发事件。
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- **参数**
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- `bot` ([Bot](adapters/index.md#Bot)): Bot 对象
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- `event` ([Event](adapters/index.md#Event)): Event 对象
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- **返回**
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- None
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- **用法**
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```python
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import asyncio
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asyncio.create_task(handle_event(bot, event))
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```
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