🔀 Merge pull request #588

Feature: `Handler` Dependency Injection

.github/workflows/build_docs.yml

@@ -25,8 +25,6 @@ jobs:
         with:
           path: ~/.cache/pypoetry/virtualenvs
           key: ${{ runner.os }}-poetry-${{ hashFiles('poetry.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-poetry-
 
       - name: Set up dependencies
         run: |

docs/api/dependencies.md

@@ -0,0 +1,43 @@
+---
+contentSidebar: true
+sidebarDepth: 0
+---
+
+# NoneBot.handler 模块
+
+## 依赖注入处理模块
+
+该模块实现了依赖注入的定义与处理。
+
+
+## `Depends(dependency=None, *, use_cache=True)`
+
+
+* **说明**
+
+    参数依赖注入装饰器
+
+
+
+* **参数**
+
+    
+    * `dependency: Optional[Callable[..., Any]] = None`: 依赖函数。默认为参数的类型注释。
+
+
+    * `use_cache: bool = True`: 是否使用缓存。默认为 `True`。
+
+
+```python
+def depend_func() -> Any:
+    return ...
+
+def depend_gen_func():
+    try:
+        yield ...
+    finally:
+        ...
+
+async def handler(param_name: Any = Depends(depend_func), gen: Any = Depends(depend_gen_func)):
+    ...
+```

docs/api/exception.md

@@ -22,24 +22,6 @@ sidebarDepth: 0
 
 
 
-## _exception_ `IgnoredException`
-
-基类：`nonebot.exception.NoneBotException`
-
-
-* **说明**
-
-    指示 NoneBot 应该忽略该事件。可由 PreProcessor 抛出。
-
-
-
-* **参数**
-
-    
-    * `reason`: 忽略事件的原因
-
-
-
 ## _exception_ `ParserExit`
 
 基类：`nonebot.exception.NoneBotException`
@@ -61,57 +43,21 @@ sidebarDepth: 0
 
 
 
-## _exception_ `PausedException`
+## _exception_ `IgnoredException`
 
 基类：`nonebot.exception.NoneBotException`
 
 
 * **说明**
 
-    指示 NoneBot 结束当前 `Handler` 并等待下一条消息后继续下一个 `Handler`。
+    指示 NoneBot 应该忽略该事件。可由 PreProcessor 抛出。
-    可用于用户输入新信息。
 
 
 
-* **用法**
+* **参数**
-
-    可以在 `Handler` 中通过 `Matcher.pause()` 抛出。
 
     
-
+    * `reason`: 忽略事件的原因
-## _exception_ `RejectedException`
-
-基类：`nonebot.exception.NoneBotException`
-
-
-* **说明**
-
-    指示 NoneBot 结束当前 `Handler` 并等待下一条消息后重新运行当前 `Handler`。
-    可用于用户重新输入。
-
-
-
-* **用法**
-
-    可以在 `Handler` 中通过 `Matcher.reject()` 抛出。
-
-
-
-## _exception_ `FinishedException`
-
-基类：`nonebot.exception.NoneBotException`
-
-
-* **说明**
-
-    指示 NoneBot 结束当前 `Handler` 且后续 `Handler` 不再被运行。
-    可用于结束用户会话。
-
-
-
-* **用法**
-
-    可以在 `Handler` 中通过 `Matcher.finish()` 抛出。
 
 
 
@@ -132,6 +78,88 @@ sidebarDepth: 0
 
 
 
+## _exception_ `MatcherException`
+
+基类：`nonebot.exception.NoneBotException`
+
+
+* **说明**
+
+    所有 Matcher 发生的异常基类。
+
+
+
+## _exception_ `SkippedException`
+
+基类：`nonebot.exception.MatcherException`
+
+
+* **说明**
+
+    指示 NoneBot 立即结束当前 `Handler` 的处理，继续处理下一个 `Handler`。
+
+
+
+* **用法**
+
+    可以在 `Handler` 中通过 `Matcher.skip()` 抛出。
+
+
+
+## _exception_ `PausedException`
+
+基类：`nonebot.exception.MatcherException`
+
+
+* **说明**
+
+    指示 NoneBot 结束当前 `Handler` 并等待下一条消息后继续下一个 `Handler`。
+    可用于用户输入新信息。
+
+
+
+* **用法**
+
+    可以在 `Handler` 中通过 `Matcher.pause()` 抛出。
+
+
+
+## _exception_ `RejectedException`
+
+基类：`nonebot.exception.MatcherException`
+
+
+* **说明**
+
+    指示 NoneBot 结束当前 `Handler` 并等待下一条消息后重新运行当前 `Handler`。
+    可用于用户重新输入。
+
+
+
+* **用法**
+
+    可以在 `Handler` 中通过 `Matcher.reject()` 抛出。
+
+
+
+## _exception_ `FinishedException`
+
+基类：`nonebot.exception.MatcherException`
+
+
+* **说明**
+
+    指示 NoneBot 结束当前 `Handler` 且后续 `Handler` 不再被运行。
+    可用于结束用户会话。
+
+
+
+* **用法**
+
+    可以在 `Handler` 中通过 `Matcher.finish()` 抛出。
+
+
+
 ## _exception_ `AdapterException`
 
 基类：`nonebot.exception.NoneBotException`
@@ -152,7 +180,7 @@ sidebarDepth: 0
 
 ## _exception_ `NoLogException`
 
-基类：`Exception`
+基类：`nonebot.exception.AdapterException`
 
 
 * **说明**

docs/api/handler.md

@@ -14,12 +14,32 @@ sidebarDepth: 0
 
 基类：`object`
 
-事件处理函数类
+事件处理器类。支持依赖注入。
 
 
-### `__init__(func)`
+### `__init__(func, *, name=None, dependencies=None, allow_types=None)`
+
+
+* **说明**
+
+    装饰一个函数为事件处理器。
+
+
+
+* **参数**
+
+    
+    * `func: Callable[..., Any]`: 事件处理函数。
+
+
+    * `name: Optional[str]`: 事件处理器名称。默认为函数名。
+
+
+    * `dependencies: Optional[List[DependsWrapper]]`: 额外的非参数依赖注入。
+
+
+    * `allow_types: Optional[List[Type[Param]]]`: 允许的参数类型。
 
-装饰事件处理函数以便根据动态参数运行
 
 
 ### `func`
@@ -27,7 +47,7 @@ sidebarDepth: 0
 
 * **类型**
 
-    `T_Handler`
+    `Callable[..., Any]`
 
 
 
@@ -37,75 +57,45 @@ sidebarDepth: 0
 
 
 
-### `signature`
+### `name`
 
 
 * **类型**
 
-    `inspect.Signature`
+    `str`
 
 
 
 * **说明**
 
-    事件处理函数签名
+    事件处理函数名
 
 
 
-### _property_ `bot_type`
+### `allow_types`
 
 
 * **类型**
 
-    `Union[Type["Bot"], inspect.Parameter.empty]`
+    `List[Type[Param]]`
 
 
 
 * **说明**
 
-    事件处理函数接受的 Bot 对象类型
+    事件处理器允许的参数类型
 
 
 
-### _property_ `event_type`
+### `dependencies`
 
 
 * **类型**
 
-    `Optional[Union[Type[Event], inspect.Parameter.empty]]`
+    `List[DependsWrapper]`
 
 
 
 * **说明**
 
-    事件处理函数接受的 event 类型 / 不需要 event 参数
+    事件处理器的额外依赖
-
-
-
-### _property_ `state_type`
-
-
-* **类型**
-
-    `Optional[Union[T_State, inspect.Parameter.empty]]`
-
-
-
-* **说明**
-
-    事件处理函数是否接受 state 参数
-
-
-
-### _property_ `matcher_type`
-
-
-* **类型**
-
-    `Optional[Union[Type["Matcher"], inspect.Parameter.empty]]`
-
-
-
-* **说明**
-
-    事件处理函数是否接受 matcher 参数

docs/api/matcher.md

@@ -348,7 +348,7 @@ sidebarDepth: 0
 
 
 
-### _async classmethod_ `check_perm(bot, event)`
+### _async classmethod_ `check_perm(bot, event, stack=None, dependency_cache=None)`
 
 
 * **说明**
@@ -374,7 +374,7 @@ sidebarDepth: 0
 
 
 
-### _async classmethod_ `check_rule(bot, event, state)`
+### _async classmethod_ `check_rule(bot, event, state, stack=None, dependency_cache=None)`
 
 
 * **说明**

docs/api/message.md

@@ -19,21 +19,6 @@ NoneBot 内部处理并按优先级分发事件给所有事件响应器，提供
 
 
 
-* **参数**
-
-    事件预处理函数接收三个参数。
-
-
-    * `bot: Bot`: Bot 对象
-
-
-    * `event: Event`: Event 对象
-
-
-    * `state: T_State`: 当前 State
-
-
-
 ## `event_postprocessor(func)`
 
 
@@ -43,21 +28,6 @@ NoneBot 内部处理并按优先级分发事件给所有事件响应器，提供
 
 
 
-* **参数**
-
-    事件后处理函数接收三个参数。
-
-
-    * `bot: Bot`: Bot 对象
-
-
-    * `event: Event`: Event 对象
-
-
-    * `state: T_State`: 当前事件运行前 State
-
-
-
 ## `run_preprocessor(func)`
 
 
@@ -67,24 +37,6 @@ NoneBot 内部处理并按优先级分发事件给所有事件响应器，提供
 
 
 
-* **参数**
-
-    运行预处理函数接收四个参数。
-
-
-    * `matcher: Matcher`: 当前要运行的事件响应器
-
-
-    * `bot: Bot`: Bot 对象
-
-
-    * `event: Event`: Event 对象
-
-
-    * `state: T_State`: 当前 State
-
-
-
 ## `run_postprocessor(func)`
 
 
@@ -94,27 +46,6 @@ NoneBot 内部处理并按优先级分发事件给所有事件响应器，提供
 
 
 
-* **参数**
-
-    运行后处理函数接收五个参数。
-
-
-    * `matcher: Matcher`: 运行完毕的事件响应器
-
-
-    * `exception: Optional[Exception]`: 事件响应器运行错误（如果存在）
-
-
-    * `bot: Bot`: Bot 对象
-
-
-    * `event: Event`: Event 对象
-
-
-    * `state: T_State`: 当前 State
-
-
-
 ## _async_ `handle_event(bot, event)`
 
 

docs/api/permission.md

@@ -7,7 +7,7 @@ sidebarDepth: 0
 
 ## 权限
 
-每个 `Matcher` 拥有一个 `Permission` ，其中是 **异步** `PermissionChecker` 的集合，只要有一个 `PermissionChecker` 检查结果为 `True` 时就会继续运行。
+每个 `Matcher` 拥有一个 `Permission` ，其中是 `PermissionChecker` 的集合，只要有一个 `PermissionChecker` 检查结果为 `True` 时就会继续运行。
 
 :::tip 提示
 `PermissionChecker` 既可以是 async function 也可以是 sync function
@@ -42,7 +42,7 @@ Permission(async_function, run_sync(sync_function))
 * **参数**
 
     
-    * `*checkers: Callable[[Bot, Event], Awaitable[bool]]`: **异步** PermissionChecker
+    * `*checkers: Union[T_PermissionChecker, Handler]`: PermissionChecker
 
 
 
@@ -58,11 +58,11 @@ Permission(async_function, run_sync(sync_function))
 * **类型**
 
     
-    * `Set[Callable[[Bot, Event], Awaitable[bool]]]`
+    * `Set[Handler]`
 
 
 
-### _async_ `__call__(bot, event)`
+### _async_ `__call__(bot, event, stack=None, dependency_cache=None)`
 
 
 * **说明**
@@ -80,6 +80,12 @@ Permission(async_function, run_sync(sync_function))
     * `event: Event`: Event 对象
 
 
+    * `stack: Optional[AsyncExitStack]`: 异步上下文栈
+
+
+    * `dependency_cache: Optional[Dict[Callable[..., Any], Any]]`: 依赖缓存
+
+
 
 * **返回**
 

docs/api/rule.md

@@ -7,10 +7,10 @@ sidebarDepth: 0
 
 ## 规则
 
-每个事件响应器 `Matcher` 拥有一个匹配规则 `Rule` ，其中是 **异步** `RuleChecker` 的集合，只有当所有 `RuleChecker` 检查结果为 `True` 时继续运行。
+每个事件响应器 `Matcher` 拥有一个匹配规则 `Rule` ，其中是 `RuleChecker` 的集合，只有当所有 `RuleChecker` 检查结果为 `True` 时继续运行。
 
 :::tip 提示
-`RuleChecker` 既可以是 async function 也可以是 sync function，但在最终会被 `nonebot.utils.run_sync` 转换为 async function
+`RuleChecker` 既可以是 async function 也可以是 sync function
 :::
 
 
@@ -42,7 +42,7 @@ Rule(async_function, run_sync(sync_function))
 * **参数**
 
     
-    * `*checkers: Callable[[Bot, Event, T_State], Awaitable[bool]]`: **异步** RuleChecker
+    * `*checkers: Union[T_RuleChecker, Handler]`: RuleChecker
 
 
 
@@ -58,11 +58,11 @@ Rule(async_function, run_sync(sync_function))
 * **类型**
 
     
-    * `Set[Callable[[Bot, Event, T_State], Awaitable[bool]]]`
+    * `Set[Handler]`
 
 
 
-### _async_ `__call__(bot, event, state)`
+### _async_ `__call__(bot, event, state, stack=None, dependency_cache=None)`
 
 
 * **说明**
@@ -83,6 +83,12 @@ Rule(async_function, run_sync(sync_function))
     * `state: T_State`: 当前 State
 
 
+    * `stack: Optional[AsyncExitStack]`: 异步上下文栈
+
+
+    * `dependency_cache: Optional[Dict[Callable[..., Any], Any]]`: 依赖缓存
+
+
 
 * **返回**
 

docs/api/typing.md

@@ -115,7 +115,20 @@ sidebarDepth: 0
 
 * **类型**
 
-    `Callable[[Bot, Event, T_State], Awaitable[None]]`
+    `Callable[..., Union[None, Awaitable[None]]]`
+
+
+
+* **依赖参数**
+
+    
+    * `BotParam`: Bot 对象
+
+
+    * `EventParam`: Event 对象
+
+
+    * `StateParam`: State 对象
 
 
 
@@ -131,7 +144,20 @@ sidebarDepth: 0
 
 * **类型**
 
-    `Callable[[Bot, Event, T_State], Awaitable[None]]`
+    `Callable[..., Union[None, Awaitable[None]]]`
+
+
+
+* **依赖参数**
+
+    
+    * `BotParam`: Bot 对象
+
+
+    * `EventParam`: Event 对象
+
+
+    * `StateParam`: State 对象
 
 
 
@@ -147,7 +173,23 @@ sidebarDepth: 0
 
 * **类型**
 
-    `Callable[[Matcher, Bot, Event, T_State], Awaitable[None]]`
+    `Callable[..., Union[None, Awaitable[None]]]`
+
+
+
+* **依赖参数**
+
+    
+    * `BotParam`: Bot 对象
+
+
+    * `EventParam`: Event 对象
+
+
+    * `StateParam`: State 对象
+
+
+    * `MatcherParam`: Matcher 对象
 
 
 
@@ -163,7 +205,26 @@ sidebarDepth: 0
 
 * **类型**
 
-    `Callable[[Matcher, Optional[Exception], Bot, Event, T_State], Awaitable[None]]`
+    `Callable[..., Union[None, Awaitable[None]]]`
+
+
+
+* **依赖参数**
+
+    
+    * `BotParam`: Bot 对象
+
+
+    * `EventParam`: Event 对象
+
+
+    * `StateParam`: State 对象
+
+
+    * `MatcherParam`: Matcher 对象
+
+
+    * `ExceptionParam`: 异常对象（可能为 None）
 
 
 
@@ -179,7 +240,20 @@ sidebarDepth: 0
 
 * **类型**
 
-    `Callable[[Bot, Event, T_State], Union[bool, Awaitable[bool]]]`
+    `Callable[..., Union[bool, Awaitable[bool]]]`
+
+
+
+* **依赖参数**
+
+    
+    * `BotParam`: Bot 对象
+
+
+    * `EventParam`: Event 对象
+
+
+    * `StateParam`: State 对象
 
 
 
@@ -195,7 +269,17 @@ sidebarDepth: 0
 
 * **类型**
 
-    `Callable[[Bot, Event], Union[bool, Awaitable[bool]]]`
+    `Callable[..., Union[bool, Awaitable[bool]]]`
+
+
+
+* **依赖参数**
+
+    
+    * `BotParam`: Bot 对象
+
+
+    * `EventParam`: Event 对象
 
 
 
@@ -211,23 +295,29 @@ sidebarDepth: 0
 
 * **类型**
 
-    
+    `Callable[..., Any]`
-    * `Callable[[Bot, Event, T_State], Union[Awaitable[None], Awaitable[NoReturn]]]`
-
-
-    * `Callable[[Bot, Event], Union[Awaitable[None], Awaitable[NoReturn]]]`
-
-
-    * `Callable[[Bot, T_State], Union[Awaitable[None], Awaitable[NoReturn]]]`
-
-
-    * `Callable[[Bot], Union[Awaitable[None], Awaitable[NoReturn]]]`
 
 
 
 * **说明**
 
-    Handler 即事件的处理函数。
+    Handler 处理函数。
+
+
+
+
+## `T_DependencyCache`
+
+
+* **类型**
+
+    `Dict[T_Handler, Any]`
+
+
+
+* **说明**
+
+    依赖缓存, 用于存储依赖函数的返回值
 
 
 

docs/api/utils.md

@@ -41,14 +41,14 @@ sidebarDepth: 0
 * **参数**
 
     
-    * `func: Callable[..., Any]`: 被装饰的同步函数
+    * `func: Callable[P, R]`: 被装饰的同步函数
 
 
 
 * **返回**
 
     
-    * `Callable[..., Awaitable[Any]]`
+    * `Callable[P, Awaitable[R]]`
 
 
 

docs_build/dependencies.rst

@@ -0,0 +1,12 @@
+\-\-\-
+contentSidebar: true
+sidebarDepth: 0
+\-\-\-
+
+NoneBot.handler 模块
+====================
+
+.. automodule:: nonebot.dependencies
+   :members:
+   :private-members:
+   :show-inheritance:

nonebot/__init__.py

@@ -278,6 +278,7 @@ def run(host: Optional[str] = None,
     get_driver().run(host, port, *args, **kwargs)
 
 
+import nonebot.params as params
 from nonebot.plugin import export as export
 from nonebot.plugin import require as require
 from nonebot.plugin import on_regex as on_regex

nonebot/config.py

@@ -67,8 +67,7 @@ class CustomEnvSettings(EnvSettingsSource):
                     env_val = settings.__config__.json_loads(env_val)
                 except ValueError as e:
                     raise SettingsError(
-                        f'error parsing JSON for "{env_name}"'  # type: ignore
+                        f'error parsing JSON for "{env_name}"') from e
-                    ) from e
             d[field.alias] = env_val
 
         if env_file_vars:

nonebot/dependencies/__init__.py

@@ -0,0 +1,232 @@
+"""
+依赖注入处理模块
+===============
+
+该模块实现了依赖注入的定义与处理。
+"""
+
+import inspect
+from itertools import chain
+from typing import Any, Dict, List, Type, Tuple, Callable, Optional, cast
+from contextlib import AsyncExitStack, contextmanager, asynccontextmanager
+
+from pydantic import BaseConfig
+from pydantic.schema import get_annotation_from_field_info
+from pydantic.fields import Required, Undefined, ModelField
+
+from nonebot.log import logger
+from .models import Param as Param
+from .utils import get_typed_signature
+from .models import Dependent as Dependent
+from nonebot.exception import SkippedException
+from .models import DependsWrapper as DependsWrapper
+from nonebot.typing import T_Handler, T_DependencyCache
+from nonebot.utils import (CacheLock, run_sync, is_gen_callable,
+                           run_sync_ctx_manager, is_async_gen_callable,
+                           is_coroutine_callable)
+
+cache_lock = CacheLock()
+
+
+class CustomConfig(BaseConfig):
+    arbitrary_types_allowed = True
+
+
+def get_param_sub_dependent(
+        *,
+        param: inspect.Parameter,
+        allow_types: Optional[List[Type[Param]]] = None) -> Dependent:
+    depends: DependsWrapper = param.default
+    if depends.dependency:
+        dependency = depends.dependency
+    else:
+        dependency = param.annotation
+    return get_sub_dependant(depends=depends,
+                             dependency=dependency,
+                             name=param.name,
+                             allow_types=allow_types)
+
+
+def get_parameterless_sub_dependant(
+        *,
+        depends: DependsWrapper,
+        allow_types: Optional[List[Type[Param]]] = None) -> Dependent:
+    assert callable(
+        depends.dependency
+    ), "A parameter-less dependency must have a callable dependency"
+    return get_sub_dependant(depends=depends,
+                             dependency=depends.dependency,
+                             allow_types=allow_types)
+
+
+def get_sub_dependant(
+        *,
+        depends: DependsWrapper,
+        dependency: T_Handler,
+        name: Optional[str] = None,
+        allow_types: Optional[List[Type[Param]]] = None) -> Dependent:
+    sub_dependant = get_dependent(func=dependency,
+                                  name=name,
+                                  use_cache=depends.use_cache,
+                                  allow_types=allow_types)
+    return sub_dependant
+
+
+def get_dependent(*,
+                  func: T_Handler,
+                  name: Optional[str] = None,
+                  use_cache: bool = True,
+                  allow_types: Optional[List[Type[Param]]] = None) -> Dependent:
+    signature = get_typed_signature(func)
+    params = signature.parameters
+    dependent = Dependent(func=func,
+                          name=name,
+                          allow_types=allow_types,
+                          use_cache=use_cache)
+    for param_name, param in params.items():
+        if isinstance(param.default, DependsWrapper):
+            sub_dependent = get_param_sub_dependent(param=param,
+                                                    allow_types=allow_types)
+            dependent.dependencies.append(sub_dependent)
+            continue
+
+        default_value = Required
+        if param.default != param.empty:
+            default_value = param.default
+
+        if isinstance(default_value, Param):
+            field_info = default_value
+            default_value = field_info.default
+        else:
+            for allow_type in dependent.allow_types:
+                if allow_type._check(param_name, param):
+                    field_info = allow_type(default_value)
+                    break
+            else:
+                raise ValueError(
+                    f"Unknown parameter {param_name} for function {func} with type {param.annotation}"
+                )
+
+        annotation: Any = Any
+        required = default_value == Required
+        if param.annotation != param.empty:
+            annotation = param.annotation
+        annotation = get_annotation_from_field_info(annotation, field_info,
+                                                    param_name)
+        dependent.params.append(
+            ModelField(name=param_name,
+                       type_=annotation,
+                       class_validators=None,
+                       model_config=CustomConfig,
+                       default=None if required else default_value,
+                       required=required,
+                       field_info=field_info))
+
+    return dependent
+
+
+async def solve_dependencies(
+        *,
+        _dependent: Dependent,
+        _stack: Optional[AsyncExitStack] = None,
+        _sub_dependents: Optional[List[Dependent]] = None,
+        _dependency_cache: Optional[T_DependencyCache] = None,
+        **params: Any) -> Tuple[Dict[str, Any], T_DependencyCache]:
+    values: Dict[str, Any] = {}
+    dependency_cache = {} if _dependency_cache is None else _dependency_cache
+
+    # solve sub dependencies
+    sub_dependent: Dependent
+    for sub_dependent in chain(_sub_dependents or tuple(),
+                               _dependent.dependencies):
+        sub_dependent.func = cast(Callable[..., Any], sub_dependent.func)
+        sub_dependent.cache_key = cast(Callable[..., Any],
+                                       sub_dependent.cache_key)
+        func = sub_dependent.func
+
+        # solve sub dependency with current cache
+        solved_result = await solve_dependencies(
+            _dependent=sub_dependent,
+            _dependency_cache=dependency_cache,
+            **params)
+        sub_values, sub_dependency_cache = solved_result
+        # update cache?
+        # dependency_cache.update(sub_dependency_cache)
+
+        # run dependency function
+        async with cache_lock:
+            if sub_dependent.use_cache and sub_dependent.cache_key in dependency_cache:
+                solved = dependency_cache[sub_dependent.cache_key]
+            elif is_gen_callable(func) or is_async_gen_callable(func):
+                assert isinstance(
+                    _stack, AsyncExitStack
+                ), "Generator dependency should be called in context"
+                if is_gen_callable(func):
+                    cm = run_sync_ctx_manager(
+                        contextmanager(func)(**sub_values))
+                else:
+                    cm = asynccontextmanager(func)(**sub_values)
+                solved = await _stack.enter_async_context(cm)
+            elif is_coroutine_callable(func):
+                solved = await func(**sub_values)
+            else:
+                solved = await run_sync(func)(**sub_values)
+
+            # parameter dependency
+            if sub_dependent.name is not None:
+                values[sub_dependent.name] = solved
+            # save current dependency to cache
+            if sub_dependent.cache_key not in dependency_cache:
+                dependency_cache[sub_dependent.cache_key] = solved
+
+    # usual dependency
+    for field in _dependent.params:
+        field_info = field.field_info
+        assert isinstance(field_info,
+                          Param), "Params must be subclasses of Param"
+        value = field_info._solve(**params)
+        if value == Undefined:
+            value = field.get_default()
+        _, errs_ = field.validate(value,
+                                  values,
+                                  loc=(str(field_info), field.alias))
+        if errs_:
+            logger.debug(
+                f"{field_info} "
+                f"type {type(value)} not match depends {_dependent.func} "
+                f"annotation {field._type_display()}, ignored")
+            raise SkippedException
+        else:
+            values[field.name] = value
+
+    return values, dependency_cache
+
+
+def Depends(dependency: Optional[T_Handler] = None,
+            *,
+            use_cache: bool = True) -> Any:
+    """
+    :说明:
+
+      参数依赖注入装饰器
+
+    :参数:
+
+      * ``dependency: Optional[Callable[..., Any]] = None``: 依赖函数。默认为参数的类型注释。
+      * ``use_cache: bool = True``: 是否使用缓存。默认为 ``True``。
+
+    .. code-block:: python
+
+        def depend_func() -> Any:
+            return ...
+
+        def depend_gen_func():
+            try:
+                yield ...
+            finally:
+                ...
+
+        async def handler(param_name: Any = Depends(depend_func), gen: Any = Depends(depend_gen_func)):
+            ...
+    """
+    return DependsWrapper(dependency=dependency, use_cache=use_cache)

nonebot/dependencies/models.py

@@ -0,0 +1,54 @@
+import abc
+import inspect
+from typing import Any, List, Type, Optional
+
+from pydantic.fields import FieldInfo, ModelField
+
+from nonebot.utils import get_name
+from nonebot.typing import T_Handler
+
+
+class Param(abc.ABC, FieldInfo):
+
+    @classmethod
+    @abc.abstractmethod
+    def _check(cls, name: str, param: inspect.Parameter) -> bool:
+        raise NotImplementedError
+
+    @abc.abstractmethod
+    def _solve(self, **kwargs: Any) -> Any:
+        raise NotImplementedError
+
+
+class DependsWrapper:
+
+    def __init__(self,
+                 dependency: Optional[T_Handler] = None,
+                 *,
+                 use_cache: bool = True) -> None:
+        self.dependency = dependency
+        self.use_cache = use_cache
+
+    def __repr__(self) -> str:
+        dep = get_name(self.dependency)
+        cache = "" if self.use_cache else ", use_cache=False"
+        return f"{self.__class__.__name__}({dep}{cache})"
+
+
+class Dependent:
+
+    def __init__(self,
+                 *,
+                 func: Optional[T_Handler] = None,
+                 name: Optional[str] = None,
+                 params: Optional[List[ModelField]] = None,
+                 allow_types: Optional[List[Type[Param]]] = None,
+                 dependencies: Optional[List["Dependent"]] = None,
+                 use_cache: bool = True) -> None:
+        self.func = func
+        self.name = name
+        self.params = params or []
+        self.allow_types = allow_types or []
+        self.dependencies = dependencies or []
+        self.use_cache = use_cache
+        self.cache_key = self.func

nonebot/dependencies/utils.py

@@ -0,0 +1,37 @@
+import inspect
+from typing import Any, Dict
+
+from loguru import logger
+from pydantic.typing import ForwardRef, evaluate_forwardref
+
+from nonebot.typing import T_Handler
+
+
+def get_typed_signature(func: T_Handler) -> inspect.Signature:
+    signature = inspect.signature(func)
+    globalns = getattr(func, "__globals__", {})
+    typed_params = [
+        inspect.Parameter(
+            name=param.name,
+            kind=param.kind,
+            default=param.default,
+            annotation=get_typed_annotation(param, globalns),
+        ) for param in signature.parameters.values()
+    ]
+    typed_signature = inspect.Signature(typed_params)
+    return typed_signature
+
+
+def get_typed_annotation(param: inspect.Parameter, globalns: Dict[str,
+                                                                  Any]) -> Any:
+    annotation = param.annotation
+    if isinstance(annotation, str):
+        annotation = ForwardRef(annotation)
+        try:
+            annotation = evaluate_forwardref(annotation, globalns, globalns)
+        except Exception as e:
+            logger.opt(colors=True, exception=e).warning(
+                f"Unknown ForwardRef[\"{param.annotation}\"] for parameter {param.name}"
+            )
+            return inspect.Parameter.empty
+    return annotation

nonebot/drivers/aiohttp.py

@@ -248,6 +248,8 @@ class Driver(ForwardDriver):
                         await asyncio.sleep(3)
                         continue
 
+                    setup_ = cast(HTTPPollingSetup, setup_)
+
                     if not bot:
                         request = await _build_request(setup_)
                         if not request:
@@ -264,7 +266,6 @@ class Driver(ForwardDriver):
                         bot.request = request
 
                     request = cast(HTTPRequest, request)
-                    setup_ = cast(HTTPPollingSetup, setup_)
 
                     headers = request.headers
                     timeout = aiohttp.ClientTimeout(30)

nonebot/drivers/fastapi.py

@@ -409,6 +409,8 @@ class Driver(ReverseDriver, ForwardDriver):
                         await asyncio.sleep(3)
                         continue
 
+                    setup_ = cast(HTTPPollingSetup, setup_)
+
                     if not bot:
                         request = await _build_request(setup_)
                         if not request:
@@ -423,7 +425,6 @@ class Driver(ReverseDriver, ForwardDriver):
                             continue
                         bot.request = request
 
-                    setup_ = cast(HTTPPollingSetup, setup_)
                     request = cast(HTTPRequest, request)
                     headers = request.headers
 

nonebot/exception.py

@@ -6,6 +6,8 @@
 这些异常并非所有需要用户处理，在 NoneBot 内部运行时被捕获，并进行对应操作。
 """
 
+from typing import Optional
+
 
 class NoneBotException(Exception):
     """
@@ -13,9 +15,33 @@ class NoneBotException(Exception):
 
       所有 NoneBot 发生的异常基类。
     """
-    pass
 
 
+# Rule Exception
+class ParserExit(NoneBotException):
+    """
+    :说明:
+
+      ``shell command`` 处理消息失败时返回的异常
+
+    :参数:
+
+      * ``status``
+      * ``message``
+    """
+
+    def __init__(self, status: int = 0, message: Optional[str] = None):
+        self.status = status
+        self.message = message
+
+    def __repr__(self):
+        return f"<ParserExit status={self.status} message={self.message}>"
+
+    def __str__(self):
+        return self.__repr__()
+
+
+# Processor Exception
 class IgnoredException(NoneBotException):
     """
     :说明:
@@ -37,71 +63,6 @@ class IgnoredException(NoneBotException):
         return self.__repr__()
 
 
-class ParserExit(NoneBotException):
-    """
-    :说明:
-
-      ``shell command`` 处理消息失败时返回的异常
-
-    :参数:
-
-      * ``status``
-      * ``message``
-    """
-
-    def __init__(self, status=0, message=None):
-        self.status = status
-        self.message = message
-
-    def __repr__(self):
-        return f"<ParserExit status={self.status} message={self.message}>"
-
-    def __str__(self):
-        return self.__repr__()
-
-
-class PausedException(NoneBotException):
-    """
-    :说明:
-
-      指示 NoneBot 结束当前 ``Handler`` 并等待下一条消息后继续下一个 ``Handler``。
-      可用于用户输入新信息。
-
-    :用法:
-
-      可以在 ``Handler`` 中通过 ``Matcher.pause()`` 抛出。
-    """
-    pass
-
-
-class RejectedException(NoneBotException):
-    """
-    :说明:
-
-      指示 NoneBot 结束当前 ``Handler`` 并等待下一条消息后重新运行当前 ``Handler``。
-      可用于用户重新输入。
-
-    :用法:
-
-      可以在 ``Handler`` 中通过 ``Matcher.reject()`` 抛出。
-    """
-    pass
-
-
-class FinishedException(NoneBotException):
-    """
-    :说明:
-
-      指示 NoneBot 结束当前 ``Handler`` 且后续 ``Handler`` 不再被运行。
-      可用于结束用户会话。
-
-    :用法:
-
-      可以在 ``Handler`` 中通过 ``Matcher.finish()`` 抛出。
-    """
-    pass
-
-
 class StopPropagation(NoneBotException):
     """
     :说明:
@@ -112,9 +73,69 @@ class StopPropagation(NoneBotException):
 
       在 ``Matcher.block == True`` 时抛出。
     """
-    pass
 
 
+# Matcher Exceptions
+class MatcherException(NoneBotException):
+    """
+    :说明:
+
+      所有 Matcher 发生的异常基类。
+    """
+
+
+class SkippedException(MatcherException):
+    """
+    :说明:
+
+      指示 NoneBot 立即结束当前 ``Handler`` 的处理，继续处理下一个 ``Handler``。
+
+    :用法:
+
+      可以在 ``Handler`` 中通过 ``Matcher.skip()`` 抛出。
+    """
+
+
+class PausedException(MatcherException):
+    """
+    :说明:
+
+      指示 NoneBot 结束当前 ``Handler`` 并等待下一条消息后继续下一个 ``Handler``。
+      可用于用户输入新信息。
+
+    :用法:
+
+      可以在 ``Handler`` 中通过 ``Matcher.pause()`` 抛出。
+    """
+
+
+class RejectedException(MatcherException):
+    """
+    :说明:
+
+      指示 NoneBot 结束当前 ``Handler`` 并等待下一条消息后重新运行当前 ``Handler``。
+      可用于用户重新输入。
+
+    :用法:
+
+      可以在 ``Handler`` 中通过 ``Matcher.reject()`` 抛出。
+    """
+
+
+class FinishedException(MatcherException):
+    """
+    :说明:
+
+      指示 NoneBot 结束当前 ``Handler`` 且后续 ``Handler`` 不再被运行。
+      可用于结束用户会话。
+
+    :用法:
+
+      可以在 ``Handler`` 中通过 ``Matcher.finish()`` 抛出。
+    """
+
+
+# Adapter Exceptions
 class AdapterException(NoneBotException):
     """
     :说明:
@@ -130,7 +151,7 @@ class AdapterException(NoneBotException):
         self.adapter_name = adapter_name
 
 
-class NoLogException(Exception):
+class NoLogException(AdapterException):
     """
     :说明:
 

nonebot/handler.py

@@ -5,172 +5,114 @@
 该模块实现事件处理函数的封装，以实现动态参数等功能。
 """
 
-import inspect
+import asyncio
-from typing import _eval_type  # type: ignore
+from contextlib import AsyncExitStack
-from typing import (TYPE_CHECKING, Any, Dict, List, Type, Union, Optional,
+from typing import Any, Dict, List, Type, Callable, Optional
-                    ForwardRef)
 
-from nonebot.log import logger
+from nonebot.utils import get_name, run_sync
-from nonebot.typing import T_State, T_Handler
+from nonebot.dependencies import (Param, Dependent, DependsWrapper,
-
+                                  get_dependent, solve_dependencies,
-if TYPE_CHECKING:
+                                  get_parameterless_sub_dependant)
-    from nonebot.matcher import Matcher
-    from nonebot.adapters import Bot, Event
 
 
 class Handler:
-    """事件处理函数类"""
+    """事件处理器类。支持依赖注入。"""
 
-    def __init__(self, func: T_Handler):
+    def __init__(self,
-        """装饰事件处理函数以便根据动态参数运行"""
+                 func: Callable[..., Any],
-        self.func: T_Handler = func
+                 *,
+                 name: Optional[str] = None,
+                 dependencies: Optional[List[DependsWrapper]] = None,
+                 allow_types: Optional[List[Type[Param]]] = None):
         """
-        :类型: ``T_Handler``
+        :说明:
+
+          装饰一个函数为事件处理器。
+
+        :参数:
+
+          * ``func: Callable[..., Any]``: 事件处理函数。
+          * ``name: Optional[str]``: 事件处理器名称。默认为函数名。
+          * ``dependencies: Optional[List[DependsWrapper]]``: 额外的非参数依赖注入。
+          * ``allow_types: Optional[List[Type[Param]]]``: 允许的参数类型。
+        """
+        self.func = func
+        """
+        :类型: ``Callable[..., Any]``
         :说明: 事件处理函数
         """
-        self.signature: inspect.Signature = self.get_signature()
+        self.name = get_name(func) if name is None else name
         """
-        :类型: ``inspect.Signature``
+        :类型: ``str``
-        :说明: 事件处理函数签名
+        :说明: 事件处理函数名
+        """
+        self.allow_types = allow_types or []
+        """
+        :类型: ``List[Type[Param]]``
+        :说明: 事件处理器允许的参数类型
         """
 
+        self.dependencies = dependencies or []
+        """
+        :类型: ``List[DependsWrapper]``
+        :说明: 事件处理器的额外依赖
+        """
+        self.sub_dependents: Dict[Callable[..., Any], Dependent] = {}
+        if dependencies:
+            for depends in dependencies:
+                self.cache_dependent(depends)
+        self.dependent = get_dependent(func=func, allow_types=self.allow_types)
+
     def __repr__(self) -> str:
-        return (f"<Handler {self.func.__name__}(bot: {self.bot_type}, "
+        return (
-                f"event: {self.event_type}, state: {self.state_type}, "
+            f"<Handler {self.name}({', '.join(map(str, self.dependent.params))})>"
-                f"matcher: {self.matcher_type})>")
+        )
 
     def __str__(self) -> str:
         return repr(self)
 
-    async def __call__(self, matcher: "Matcher", bot: "Bot", event: "Event",
+    async def __call__(self,
-                       state: T_State):
+                       *,
-        BotType = ((self.bot_type is not inspect.Parameter.empty) and
+                       _stack: Optional[AsyncExitStack] = None,
-                   inspect.isclass(self.bot_type) and self.bot_type)
+                       _dependency_cache: Optional[Dict[Callable[..., Any],
-        if BotType and not isinstance(bot, BotType):
+                                                        Any]] = None,
-            logger.debug(
+                       **params) -> Any:
-                f"Matcher {matcher} bot type {type(bot)} not match annotation {BotType}, ignored"
+        values, _ = await solve_dependencies(
-            )
+            _dependent=self.dependent,
-            return
+            _stack=_stack,
+            _sub_dependents=[
+                self.sub_dependents[dependency.dependency]  # type: ignore
+                for dependency in self.dependencies
+            ],
+            _dependency_cache=_dependency_cache,
+            **params)
 
-        EventType = ((self.event_type is not inspect.Parameter.empty) and
+        if asyncio.iscoroutinefunction(self.func):
-                     inspect.isclass(self.event_type) and self.event_type)
+            return await self.func(**values)
-        if EventType and not isinstance(event, EventType):
-            logger.debug(
-                f"Matcher {matcher} event type {type(event)} not match annotation {EventType}, ignored"
-            )
-            return
-
-        args = {"bot": bot, "event": event, "state": state, "matcher": matcher}
-        await self.func(
-            **{
-                k: v
-                for k, v in args.items()
-                if self.signature.parameters.get(k, None) is not None
-            })
-
-    @property
-    def bot_type(self) -> Union[Type["Bot"], inspect.Parameter.empty]:
-        """
-        :类型: ``Union[Type["Bot"], inspect.Parameter.empty]``
-        :说明: 事件处理函数接受的 Bot 对象类型"""
-        return self.signature.parameters["bot"].annotation
-
-    @property
-    def event_type(
-            self) -> Optional[Union[Type["Event"], inspect.Parameter.empty]]:
-        """
-        :类型: ``Optional[Union[Type[Event], inspect.Parameter.empty]]``
-        :说明: 事件处理函数接受的 event 类型 / 不需要 event 参数
-        """
-        if "event" not in self.signature.parameters:
-            return None
-        return self.signature.parameters["event"].annotation
-
-    @property
-    def state_type(self) -> Optional[Union[T_State, inspect.Parameter.empty]]:
-        """
-        :类型: ``Optional[Union[T_State, inspect.Parameter.empty]]``
-        :说明: 事件处理函数是否接受 state 参数
-        """
-        if "state" not in self.signature.parameters:
-            return None
-        return self.signature.parameters["state"].annotation
-
-    @property
-    def matcher_type(
-            self) -> Optional[Union[Type["Matcher"], inspect.Parameter.empty]]:
-        """
-        :类型: ``Optional[Union[Type["Matcher"], inspect.Parameter.empty]]``
-        :说明: 事件处理函数是否接受 matcher 参数
-        """
-        if "matcher" not in self.signature.parameters:
-            return None
-        return self.signature.parameters["matcher"].annotation
-
-    def get_signature(self) -> inspect.Signature:
-        wrapped_signature = self._get_typed_signature()
-        signature = self._get_typed_signature(False)
-        self._check_params(signature)
-        self._check_bot_param(signature)
-        self._check_bot_param(wrapped_signature)
-        signature.parameters["bot"].replace(
-            annotation=wrapped_signature.parameters["bot"].annotation)
-        if "event" in wrapped_signature.parameters and "event" in signature.parameters:
-            signature.parameters["event"].replace(
-                annotation=wrapped_signature.parameters["event"].annotation)
-        return signature
-
-    def update_signature(
-        self, **kwargs: Union[None, Type["Bot"], Type["Event"], Type["Matcher"],
-                              T_State, inspect.Parameter.empty]
-    ) -> None:
-        params: List[inspect.Parameter] = []
-        for param in ["bot", "event", "state", "matcher"]:
-            sig = self.signature.parameters.get(param, None)
-            if param in kwargs:
-                sig = inspect.Parameter(param,
-                                        inspect.Parameter.POSITIONAL_OR_KEYWORD,
-                                        annotation=kwargs[param])
-            if sig:
-                params.append(sig)
-
-        self.signature = inspect.Signature(params)
-
-    def _get_typed_signature(self,
-                             follow_wrapped: bool = True) -> inspect.Signature:
-        signature = inspect.signature(self.func, follow_wrapped=follow_wrapped)
-        globalns = getattr(self.func, "__globals__", {})
-        typed_params = [
-            inspect.Parameter(
-                name=param.name,
-                kind=param.kind,
-                default=param.default,
-                annotation=param.annotation if follow_wrapped else
-                self._get_typed_annotation(param, globalns),
-            ) for param in signature.parameters.values()
-        ]
-        typed_signature = inspect.Signature(typed_params)
-        return typed_signature
-
-    def _get_typed_annotation(self, param: inspect.Parameter,
-                              globalns: Dict[str, Any]) -> Any:
-        try:
-            if isinstance(param.annotation, str):
-                return _eval_type(ForwardRef(param.annotation), globalns,
-                                  globalns)
         else:
-                return param.annotation
+            return await run_sync(self.func)(**values)
-        except Exception:
-            return param.annotation
 
-    def _check_params(self, signature: inspect.Signature):
+    def cache_dependent(self, dependency: DependsWrapper):
-        if not set(signature.parameters.keys()) <= {
+        if not dependency.dependency:
-                "bot", "event", "state", "matcher"
+            raise ValueError(f"{dependency} has no dependency")
-        }:
+        if dependency.dependency in self.sub_dependents:
-            raise ValueError(
+            raise ValueError(f"{dependency} is already in dependencies")
-                "Handler param names must in `bot`/`event`/`state`/`matcher`")
+        sub_dependant = get_parameterless_sub_dependant(
+            depends=dependency, allow_types=self.allow_types)
+        self.sub_dependents[dependency.dependency] = sub_dependant
 
-    def _check_bot_param(self, signature: inspect.Signature):
+    def prepend_dependency(self, dependency: DependsWrapper):
-        if not any(
+        self.cache_dependent(dependency)
-                param.name == "bot" for param in signature.parameters.values()):
+        self.dependencies.insert(0, dependency)
-            raise ValueError("Handler missing parameter 'bot'")
+
+    def append_dependency(self, dependency: DependsWrapper):
+        self.cache_dependent(dependency)
+        self.dependencies.append(dependency)
+
+    def remove_dependency(self, dependency: DependsWrapper):
+        if not dependency.dependency:
+            raise ValueError(f"{dependency} has no dependency")
+        if dependency.dependency in self.sub_dependents:
+            del self.sub_dependents[dependency.dependency]
+        if dependency in self.dependencies:
+            self.dependencies.remove(dependency)

nonebot/matcher.py

@@ -5,35 +5,39 @@
 该模块实现事件响应器的创建与运行，并提供一些快捷方法来帮助用户更好的与机器人进行对话 。
 """
 
-from functools import wraps
 from types import ModuleType
 from datetime import datetime
 from contextvars import ContextVar
 from collections import defaultdict
+from contextlib import AsyncExitStack
 from typing import (TYPE_CHECKING, Any, Dict, List, Type, Union, Callable,
                     NoReturn, Optional)
 
+from nonebot import params
 from nonebot.rule import Rule
 from nonebot.log import logger
 from nonebot.handler import Handler
-from nonebot.adapters import MessageTemplate
+from nonebot.dependencies import DependsWrapper
 from nonebot.permission import USER, Permission
+from nonebot.adapters import (Bot, Event, Message, MessageSegment,
+                              MessageTemplate)
 from nonebot.exception import (PausedException, StopPropagation,
-                               FinishedException, RejectedException)
+                               SkippedException, FinishedException,
+                               RejectedException)
 from nonebot.typing import (T_State, T_Handler, T_ArgsParser, T_TypeUpdater,
-                            T_StateFactory, T_PermissionUpdater)
+                            T_StateFactory, T_DependencyCache,
+                            T_PermissionUpdater)
 
 if TYPE_CHECKING:
     from nonebot.plugin import Plugin
-    from nonebot.adapters import Bot, Event, Message, MessageSegment
 
 matchers: Dict[int, List[Type["Matcher"]]] = defaultdict(list)
 """
 :类型: ``Dict[int, List[Type[Matcher]]]``
 :说明: 用于存储当前所有的事件响应器
 """
-current_bot: ContextVar["Bot"] = ContextVar("current_bot")
+current_bot: ContextVar[Bot] = ContextVar("current_bot")
-current_event: ContextVar["Event"] = ContextVar("current_event")
+current_event: ContextVar[Event] = ContextVar("current_event")
 current_state: ContextVar[T_State] = ContextVar("current_state")
 
 
@@ -152,6 +156,11 @@ class Matcher(metaclass=MatcherMeta):
     :说明: 事件响应器权限更新函数
     """
 
+    HANDLER_PARAM_TYPES = [
+        params.BotParam, params.EventParam, params.StateParam,
+        params.MatcherParam, params.DefaultParam
+    ]
+
     def __init__(self):
         """实例化 Matcher 以便运行"""
         self.handlers = self.handlers.copy()
@@ -228,8 +237,8 @@ class Matcher(metaclass=MatcherMeta):
                 "permission":
                     permission or Permission(),
                 "handlers": [
-                    handler
+                    handler if isinstance(handler, Handler) else Handler(
-                    if isinstance(handler, Handler) else Handler(handler)
+                        handler, allow_types=cls.HANDLER_PARAM_TYPES)
                     for handler in handlers
                 ] if handlers else [],
                 "temp":
@@ -258,7 +267,13 @@ class Matcher(metaclass=MatcherMeta):
         return NewMatcher
 
     @classmethod
-    async def check_perm(cls, bot: "Bot", event: "Event") -> bool:
+    async def check_perm(
+        cls,
+        bot: Bot,
+        event: Event,
+        stack: Optional[AsyncExitStack] = None,
+        dependency_cache: Optional[Dict[Callable[..., Any],
+                                        Any]] = None) -> bool:
         """
         :说明:
 
@@ -275,11 +290,17 @@ class Matcher(metaclass=MatcherMeta):
         """
         event_type = event.get_type()
         return (event_type == (cls.type or event_type) and
-                await cls.permission(bot, event))
+                await cls.permission(bot, event, stack, dependency_cache))
 
     @classmethod
-    async def check_rule(cls, bot: "Bot", event: "Event",
+    async def check_rule(
-                         state: T_State) -> bool:
+        cls,
+        bot: Bot,
+        event: Event,
+        state: T_State,
+        stack: Optional[AsyncExitStack] = None,
+        dependency_cache: Optional[Dict[Callable[..., Any],
+                                        Any]] = None) -> bool:
         """
         :说明:
 
@@ -297,7 +318,7 @@ class Matcher(metaclass=MatcherMeta):
         """
         event_type = event.get_type()
         return (event_type == (cls.type or event_type) and
-                await cls.rule(bot, event, state))
+                await cls.rule(bot, event, state, stack, dependency_cache))
 
     @classmethod
     def args_parser(cls, func: T_ArgsParser) -> T_ArgsParser:
@@ -343,8 +364,13 @@ class Matcher(metaclass=MatcherMeta):
         return func
 
     @classmethod
-    def append_handler(cls, handler: T_Handler) -> Handler:
+    def append_handler(
-        handler_ = Handler(handler)
+            cls,
+            handler: T_Handler,
+            dependencies: Optional[List[DependsWrapper]] = None) -> Handler:
+        handler_ = Handler(handler,
+                           dependencies=dependencies,
+                           allow_types=cls.HANDLER_PARAM_TYPES)
         cls.handlers.append(handler_)
         return handler_
 
@@ -378,22 +404,22 @@ class Matcher(metaclass=MatcherMeta):
           * 无
         """
 
-        async def _receive(bot: "Bot", event: "Event") -> NoReturn:
+        async def _receive(state: T_State) -> Union[None, NoReturn]:
-            raise PausedException
+            if state.get(_receive):
-
+                return
-        if cls.handlers:
+            state[_receive] = True
-            # 已有前置handlers则接受一条新的消息，否则视为接收初始消息
+            raise RejectedException
-            receive_handler = cls.append_handler(_receive)
-        else:
-            receive_handler = None
 
         def _decorator(func: T_Handler) -> T_Handler:
-            if not cls.handlers or cls.handlers[-1] is not func:
+
-                func_handler = cls.append_handler(func)
+            depend = DependsWrapper(_receive)
-                if receive_handler:
+
-                    receive_handler.update_signature(
+            if cls.handlers and cls.handlers[-1].func is func:
-                        bot=func_handler.bot_type,
+                func_handler = cls.handlers[-1]
-                        event=func_handler.event_type)
+                func_handler.prepend_dependency(depend)
+            else:
+                cls.append_handler(
+                    func, dependencies=[depend] if cls.handlers else [])
 
             return func
 
@@ -403,7 +429,7 @@ class Matcher(metaclass=MatcherMeta):
     def got(
         cls,
         key: str,
-        prompt: Optional[Union[str, "Message", "MessageSegment",
+        prompt: Optional[Union[str, Message, MessageSegment,
                                MessageTemplate]] = None,
         args_parser: Optional[T_ArgsParser] = None
     ) -> Callable[[T_Handler], T_Handler]:
@@ -419,8 +445,12 @@ class Matcher(metaclass=MatcherMeta):
           * ``args_parser: Optional[T_ArgsParser]``: 可选参数解析函数，空则使用默认解析函数
         """
 
-        async def _key_getter(bot: "Bot", event: "Event", state: T_State):
+        async def _key_getter(bot: Bot, event: Event, state: T_State):
+            if state.get(f"_{key}_prompted"):
+                return
+
             state["_current_key"] = key
+            state[f"_{key}_prompted"] = True
             if key not in state:
                 if prompt is not None:
                     if isinstance(prompt, MessageTemplate):
@@ -428,52 +458,40 @@ class Matcher(metaclass=MatcherMeta):
                     else:
                         _prompt = prompt
                     await bot.send(event=event, message=_prompt)
-                raise PausedException
+                raise RejectedException
             else:
-                state["_skip_key"] = True
+                state[f"_{key}_parsed"] = True
 
-        async def _key_parser(bot: "Bot", event: "Event", state: T_State):
+        async def _key_parser(bot: Bot, event: Event, state: T_State):
-            if key in state and state.get("_skip_key"):
+            if key in state and state.get(f"_{key}_parsed"):
-                del state["_skip_key"]
                 return
+
             parser = args_parser or cls._default_parser
             if parser:
-                # parser = cast(T_ArgsParser["Bot", "Event"], parser)
                 await parser(bot, event, state)
             else:
-                state[state["_current_key"]] = str(event.get_message())
+                state[key] = str(event.get_message())
-
+            state[f"_{key}_parsed"] = True
-        getter_handler = cls.append_handler(_key_getter)
-        parser_handler = cls.append_handler(_key_parser)
 
         def _decorator(func: T_Handler) -> T_Handler:
-            if not hasattr(cls.handlers[-1].func, "__wrapped__"):
-                parser = cls.handlers.pop()
-                func_handler = Handler(func)
 
-                @wraps(func)
+            get_depend = DependsWrapper(_key_getter)
-                async def wrapper(bot: "Bot", event: "Event", state: T_State,
+            parser_depend = DependsWrapper(_key_parser)
-                                  matcher: Matcher):
-                    await parser(matcher, bot, event, state)
-                    await func_handler(matcher, bot, event, state)
-                    if "_current_key" in state:
-                        del state["_current_key"]
 
-                wrapper_handler = cls.append_handler(wrapper)
+            if cls.handlers and cls.handlers[-1].func is func:
-
+                func_handler = cls.handlers[-1]
-                getter_handler.update_signature(
+                func_handler.prepend_dependency(parser_depend)
-                    bot=wrapper_handler.bot_type,
+                func_handler.prepend_dependency(get_depend)
-                    event=wrapper_handler.event_type)
+            else:
-                parser_handler.update_signature(
+                cls.append_handler(func,
-                    bot=wrapper_handler.bot_type,
+                                   dependencies=[get_depend, parser_depend])
-                    event=wrapper_handler.event_type)
 
             return func
 
         return _decorator
 
     @classmethod
-    async def send(cls, message: Union[str, "Message", "MessageSegment",
+    async def send(cls, message: Union[str, Message, MessageSegment,
                                        MessageTemplate], **kwargs) -> Any:
         """
         :说明:
@@ -496,7 +514,7 @@ class Matcher(metaclass=MatcherMeta):
 
     @classmethod
     async def finish(cls,
-                     message: Optional[Union[str, "Message", "MessageSegment",
+                     message: Optional[Union[str, Message, MessageSegment,
                                              MessageTemplate]] = None,
                      **kwargs) -> NoReturn:
         """
@@ -522,7 +540,7 @@ class Matcher(metaclass=MatcherMeta):
 
     @classmethod
     async def pause(cls,
-                    prompt: Optional[Union[str, "Message", "MessageSegment",
+                    prompt: Optional[Union[str, Message, MessageSegment,
                                            MessageTemplate]] = None,
                     **kwargs) -> NoReturn:
         """
@@ -548,8 +566,8 @@ class Matcher(metaclass=MatcherMeta):
 
     @classmethod
     async def reject(cls,
-                     prompt: Optional[Union[str, "Message",
+                     prompt: Optional[Union[str, Message,
-                                            "MessageSegment"]] = None,
+                                            MessageSegment]] = None,
                      **kwargs) -> NoReturn:
         """
         :说明:
@@ -564,6 +582,8 @@ class Matcher(metaclass=MatcherMeta):
         bot = current_bot.get()
         event = current_event.get()
         state = current_state.get()
+        if "_current_key" in state and f"_{state['_current_key']}_parsed" in state:
+            del state[f"_{state['_current_key']}_parsed"]
         if isinstance(prompt, MessageTemplate):
             _prompt = prompt.format(**state)
         else:
@@ -581,7 +601,12 @@ class Matcher(metaclass=MatcherMeta):
         self.block = True
 
     # 运行handlers
-    async def run(self, bot: "Bot", event: "Event", state: T_State):
+    async def run(self,
+                  bot: Bot,
+                  event: Event,
+                  state: T_State,
+                  stack: Optional[AsyncExitStack] = None,
+                  dependency_cache: Optional[T_DependencyCache] = None):
         b_t = current_bot.set(bot)
         e_t = current_event.set(event)
         s_t = current_state.set(self.state)
@@ -594,7 +619,15 @@ class Matcher(metaclass=MatcherMeta):
             while self.handlers:
                 handler = self.handlers.pop(0)
                 logger.debug(f"Running handler {handler}")
-                await handler(self, bot, event, self.state)
+                try:
+                    await handler(matcher=self,
+                                  bot=bot,
+                                  event=event,
+                                  state=self.state,
+                                  _stack=stack,
+                                  _dependency_cache=dependency_cache)
+                except SkippedException:
+                    pass
 
         except RejectedException:
             self.handlers.insert(0, handler)  # type: ignore
@@ -610,10 +643,7 @@ class Matcher(metaclass=MatcherMeta):
 
             updater = self.__class__._default_permission_updater
             if updater:
-                permission = await updater(
+                permission = await updater(bot, event, self.state,
-                    bot,
-                    event,
-                    self.state,  # type: ignore
                                            self.permission)
             else:
                 permission = USER(event.get_session_id(), perm=self.permission)
@@ -647,10 +677,7 @@ class Matcher(metaclass=MatcherMeta):
 
             updater = self.__class__._default_permission_updater
             if updater:
-                permission = await updater(
+                permission = await updater(bot, event, self.state,
-                    bot,
-                    event,
-                    self.state,  # type: ignore
                                            self.permission)
             else:
                 permission = USER(event.get_session_id(), perm=self.permission)

nonebot/message.py

@@ -7,23 +7,39 @@ NoneBot 内部处理并按优先级分发事件给所有事件响应器，提供
 
 import asyncio
 from datetime import datetime
-from typing import TYPE_CHECKING, Set, Type, Optional
+from contextlib import AsyncExitStack
+from typing import TYPE_CHECKING, Any, Set, Dict, Type, Optional
 
+from nonebot import params
 from nonebot.log import logger
 from nonebot.rule import TrieRule
+from nonebot.handler import Handler
 from nonebot.utils import escape_tag
 from nonebot.matcher import Matcher, matchers
 from nonebot.exception import NoLogException, StopPropagation, IgnoredException
-from nonebot.typing import (T_State, T_RunPreProcessor, T_RunPostProcessor,
+from nonebot.typing import (T_State, T_DependencyCache, T_RunPreProcessor,
-                            T_EventPreProcessor, T_EventPostProcessor)
+                            T_RunPostProcessor, T_EventPreProcessor,
+                            T_EventPostProcessor)
 
 if TYPE_CHECKING:
     from nonebot.adapters import Bot, Event
 
-_event_preprocessors: Set[T_EventPreProcessor] = set()
+_event_preprocessors: Set[Handler] = set()
-_event_postprocessors: Set[T_EventPostProcessor] = set()
+_event_postprocessors: Set[Handler] = set()
-_run_preprocessors: Set[T_RunPreProcessor] = set()
+_run_preprocessors: Set[Handler] = set()
-_run_postprocessors: Set[T_RunPostProcessor] = set()
+_run_postprocessors: Set[Handler] = set()
+
+EVENT_PCS_PARAMS = [
+    params.BotParam, params.EventParam, params.StateParam, params.DefaultParam
+]
+RUN_PREPCS_PARAMS = [
+    params.MatcherParam, params.BotParam, params.EventParam, params.StateParam,
+    params.DefaultParam
+]
+RUN_POSTPCS_PARAMS = [
+    params.MatcherParam, params.ExceptionParam, params.BotParam,
+    params.EventParam, params.StateParam, params.DefaultParam
+]
 
 
 def event_preprocessor(func: T_EventPreProcessor) -> T_EventPreProcessor:
@@ -31,16 +47,8 @@ def event_preprocessor(func: T_EventPreProcessor) -> T_EventPreProcessor:
     :说明:
 
       事件预处理。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。
-
-    :参数:
-
-      事件预处理函数接收三个参数。
-
-      * ``bot: Bot``: Bot 对象
-      * ``event: Event``: Event 对象
-      * ``state: T_State``: 当前 State
     """
-    _event_preprocessors.add(func)
+    _event_preprocessors.add(Handler(func, allow_types=EVENT_PCS_PARAMS))
     return func
 
 
@@ -49,16 +57,8 @@ def event_postprocessor(func: T_EventPostProcessor) -> T_EventPostProcessor:
     :说明:
 
       事件后处理。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。
-
-    :参数:
-
-      事件后处理函数接收三个参数。
-
-      * ``bot: Bot``: Bot 对象
-      * ``event: Event``: Event 对象
-      * ``state: T_State``: 当前事件运行前 State
     """
-    _event_postprocessors.add(func)
+    _event_postprocessors.add(Handler(func, allow_types=EVENT_PCS_PARAMS))
     return func
 
 
@@ -67,17 +67,8 @@ def run_preprocessor(func: T_RunPreProcessor) -> T_RunPreProcessor:
     :说明:
 
       运行预处理。装饰一个函数，使它在每次事件响应器运行前执行。
-
-    :参数:
-
-      运行预处理函数接收四个参数。
-
-      * ``matcher: Matcher``: 当前要运行的事件响应器
-      * ``bot: Bot``: Bot 对象
-      * ``event: Event``: Event 对象
-      * ``state: T_State``: 当前 State
     """
-    _run_preprocessors.add(func)
+    _run_preprocessors.add(Handler(func, allow_types=RUN_PREPCS_PARAMS))
     return func
 
 
@@ -86,23 +77,19 @@ def run_postprocessor(func: T_RunPostProcessor) -> T_RunPostProcessor:
     :说明:
 
       运行后处理。装饰一个函数，使它在每次事件响应器运行后执行。
-
-    :参数:
-
-      运行后处理函数接收五个参数。
-
-      * ``matcher: Matcher``: 运行完毕的事件响应器
-      * ``exception: Optional[Exception]``: 事件响应器运行错误（如果存在）
-      * ``bot: Bot``: Bot 对象
-      * ``event: Event``: Event 对象
-      * ``state: T_State``: 当前 State
     """
-    _run_postprocessors.add(func)
+    _run_postprocessors.add(Handler(func, allow_types=RUN_POSTPCS_PARAMS))
     return func
 
 
-async def _check_matcher(priority: int, Matcher: Type[Matcher], bot: "Bot",
+async def _check_matcher(
-                         event: "Event", state: T_State) -> None:
+        priority: int,
+        Matcher: Type[Matcher],
+        bot: "Bot",
+        event: "Event",
+        state: T_State,
+        stack: Optional[AsyncExitStack] = None,
+        dependency_cache: Optional[T_DependencyCache] = None) -> None:
     if Matcher.expire_time and datetime.now() > Matcher.expire_time:
         try:
             matchers[priority].remove(Matcher)
@@ -112,7 +99,9 @@ async def _check_matcher(priority: int, Matcher: Type[Matcher], bot: "Bot",
 
     try:
         if not await Matcher.check_perm(
-                bot, event) or not await Matcher.check_rule(bot, event, state):
+                bot, event, stack,
+                dependency_cache) or not await Matcher.check_rule(
+                    bot, event, state, stack, dependency_cache):
             return
     except Exception as e:
         logger.opt(colors=True, exception=e).error(
@@ -125,17 +114,29 @@ async def _check_matcher(priority: int, Matcher: Type[Matcher], bot: "Bot",
         except Exception:
             pass
 
-    await _run_matcher(Matcher, bot, event, state)
+    await _run_matcher(Matcher, bot, event, state, stack, dependency_cache)
 
 
-async def _run_matcher(Matcher: Type[Matcher], bot: "Bot", event: "Event",
+async def _run_matcher(
-                       state: T_State) -> None:
+        Matcher: Type[Matcher],
+        bot: "Bot",
+        event: "Event",
+        state: T_State,
+        stack: Optional[AsyncExitStack] = None,
+        dependency_cache: Optional[T_DependencyCache] = None) -> None:
     logger.info(f"Event will be handled by {Matcher}")
 
     matcher = Matcher()
 
     coros = list(
-        map(lambda x: x(matcher, bot, event, state), _run_preprocessors))
+        map(
+            lambda x: x(matcher=matcher,
+                        bot=bot,
+                        event=event,
+                        state=state,
+                        _stack=stack,
+                        _dependency_cache=dependency_cache),
+            _run_preprocessors))
     if coros:
         try:
             await asyncio.gather(*coros)
@@ -153,7 +154,7 @@ async def _run_matcher(Matcher: Type[Matcher], bot: "Bot", event: "Event",
 
     try:
         logger.debug(f"Running matcher {matcher}")
-        await matcher.run(bot, event, state)
+        await matcher.run(bot, event, state, stack, dependency_cache)
     except Exception as e:
         logger.opt(colors=True, exception=e).error(
             f"<r><bg #f8bbd0>Running matcher {matcher} failed.</bg #f8bbd0></r>"
@@ -161,7 +162,14 @@ async def _run_matcher(Matcher: Type[Matcher], bot: "Bot", event: "Event",
         exception = e
 
     coros = list(
-        map(lambda x: x(matcher, exception, bot, event, state),
+        map(
+            lambda x: x(matcher=matcher,
+                        exception=exception,
+                        bot=bot,
+                        event=event,
+                        state=state,
+                        _stack=stack,
+                        _dependency_cache=dependency_cache),
             _run_postprocessors))
     if coros:
         try:
@@ -203,8 +211,18 @@ async def handle_event(bot: "Bot", event: "Event") -> None:
     if show_log:
         logger.opt(colors=True).success(log_msg)
 
-    state = {}
+    state: Dict[Any, Any] = {}
-    coros = list(map(lambda x: x(bot, event, state), _event_preprocessors))
+    dependency_cache: T_DependencyCache = {}
+
+    async with AsyncExitStack() as stack:
+        coros = list(
+            map(
+                lambda x: x(bot=bot,
+                            event=event,
+                            state=state,
+                            _stack=stack,
+                            _dependency_cache=dependency_cache),
+                _event_preprocessors))
         if coros:
             try:
                 if show_log:
@@ -212,7 +230,8 @@ async def handle_event(bot: "Bot", event: "Event") -> None:
                 await asyncio.gather(*coros)
             except IgnoredException as e:
                 logger.opt(colors=True).info(
-                f"Event {escape_tag(event.get_event_name())} is <b>ignored</b>")
+                    f"Event {escape_tag(event.get_event_name())} is <b>ignored</b>"
+                )
                 return
             except Exception as e:
                 logger.opt(colors=True, exception=e).error(
@@ -232,11 +251,13 @@ async def handle_event(bot: "Bot", event: "Event") -> None:
                 logger.debug(f"Checking for matchers in priority {priority}...")
 
             pending_tasks = [
-            _check_matcher(priority, matcher, bot, event, state.copy())
+                _check_matcher(priority, matcher, bot, event, state.copy(),
+                               stack, dependency_cache)
                 for matcher in matchers[priority]
             ]
 
-        results = await asyncio.gather(*pending_tasks, return_exceptions=True)
+            results = await asyncio.gather(*pending_tasks,
+                                           return_exceptions=True)
 
             for result in results:
                 if not isinstance(result, Exception):
@@ -249,7 +270,14 @@ async def handle_event(bot: "Bot", event: "Event") -> None:
                         "<r><bg #f8bbd0>Error when checking Matcher.</bg #f8bbd0></r>"
                     )
 
-    coros = list(map(lambda x: x(bot, event, state), _event_postprocessors))
+        coros = list(
+            map(
+                lambda x: x(bot=bot,
+                            event=event,
+                            state=state,
+                            _stack=stack,
+                            _dependency_cache=dependency_cache),
+                _event_postprocessors))
         if coros:
             try:
                 if show_log:

nonebot/params.py

@@ -0,0 +1,84 @@
+import inspect
+from typing import Any, Dict, Optional
+
+from pydantic.fields import Undefined
+
+from nonebot.typing import T_State
+from nonebot.dependencies import Param
+from nonebot.adapters import Bot, Event
+from nonebot.utils import generic_check_issubclass
+
+
+class BotParam(Param):
+
+    @classmethod
+    def _check(cls, name: str, param: inspect.Parameter) -> bool:
+        return generic_check_issubclass(
+            param.annotation, Bot) or (param.annotation == param.empty and
+                                       name == "bot")
+
+    def _solve(self, bot: Bot, **kwargs: Any) -> Any:
+        return bot
+
+
+class EventParam(Param):
+
+    @classmethod
+    def _check(cls, name: str, param: inspect.Parameter) -> bool:
+        return generic_check_issubclass(
+            param.annotation, Event) or (param.annotation == param.empty and
+                                         name == "event")
+
+    def _solve(self, event: Event, **kwargs: Any) -> Any:
+        return event
+
+
+class StateParam(Param):
+
+    @classmethod
+    def _check(cls, name: str, param: inspect.Parameter) -> bool:
+        return generic_check_issubclass(
+            param.annotation, Dict) or (param.annotation == param.empty and
+                                        name == "state")
+
+    def _solve(self, state: T_State, **kwargs: Any) -> Any:
+        return state
+
+
+class MatcherParam(Param):
+
+    @classmethod
+    def _check(cls, name: str, param: inspect.Parameter) -> bool:
+        return generic_check_issubclass(
+            param.annotation, Matcher) or (param.annotation == param.empty and
+                                           name == "matcher")
+
+    def _solve(self, matcher: Optional["Matcher"] = None, **kwargs: Any) -> Any:
+        return matcher
+
+
+class ExceptionParam(Param):
+
+    @classmethod
+    def _check(cls, name: str, param: inspect.Parameter) -> bool:
+        return generic_check_issubclass(
+            param.annotation, Exception) or (param.annotation == param.empty and
+                                             name == "exception")
+
+    def _solve(self,
+               exception: Optional[Exception] = None,
+               **kwargs: Any) -> Any:
+        return exception
+
+
+class DefaultParam(Param):
+
+    @classmethod
+    def _check(cls, name: str, param: inspect.Parameter) -> bool:
+        return param.default != param.empty
+
+    def _solve(self, **kwargs: Any) -> Any:
+        return Undefined
+
+
+from nonebot.matcher import Matcher

nonebot/permission.py

@@ -2,7 +2,7 @@ r"""
 权限
 ====
 
-每个 ``Matcher`` 拥有一个 ``Permission`` ，其中是 **异步** ``PermissionChecker`` 的集合，只要有一个 ``PermissionChecker`` 检查结果为 ``True`` 时就会继续运行。
+每个 ``Matcher`` 拥有一个 ``Permission`` ，其中是 ``PermissionChecker`` 的集合，只要有一个 ``PermissionChecker`` 检查结果为 ``True`` 时就会继续运行。
 
 \:\:\:tip 提示
 ``PermissionChecker`` 既可以是 async function 也可以是 sync function
@@ -10,14 +10,14 @@ r"""
 """
 
 import asyncio
-from typing import TYPE_CHECKING, Union, Callable, NoReturn, Optional, Awaitable
+from contextlib import AsyncExitStack
+from typing import Any, Dict, List, Type, Union, Callable, NoReturn, Optional
 
-from nonebot.utils import run_sync
+from nonebot import params
+from nonebot.handler import Handler
+from nonebot.adapters import Bot, Event
 from nonebot.typing import T_PermissionChecker
 
-if TYPE_CHECKING:
-    from nonebot.adapters import Bot, Event
-
 
 class Permission:
     """
@@ -36,15 +36,21 @@ class Permission:
     """
     __slots__ = ("checkers",)
 
-    def __init__(
+    HANDLER_PARAM_TYPES = [
-            self, *checkers: Callable[["Bot", "Event"],
+        params.BotParam, params.EventParam, params.DefaultParam
-                                      Awaitable[bool]]) -> None:
+    ]
+
+    def __init__(self, *checkers: Union[T_PermissionChecker, Handler]) -> None:
         """
         :参数:
 
-          * ``*checkers: Callable[[Bot, Event], Awaitable[bool]]``: **异步** PermissionChecker
+          * ``*checkers: Union[T_PermissionChecker, Handler]``: PermissionChecker
         """
-        self.checkers = set(checkers)
+
+        self.checkers = set(
+            checker if isinstance(checker, Handler) else Handler(
+                checker, allow_types=self.HANDLER_PARAM_TYPES)
+            for checker in checkers)
         """
         :说明:
 
@@ -52,10 +58,16 @@ class Permission:
 
         :类型:
 
-          * ``Set[Callable[[Bot, Event], Awaitable[bool]]]``
+          * ``Set[Handler]``
         """
 
-    async def __call__(self, bot: "Bot", event: "Event") -> bool:
+    async def __call__(
+        self,
+        bot: Bot,
+        event: Event,
+        stack: Optional[AsyncExitStack] = None,
+        dependency_cache: Optional[Dict[Callable[..., Any],
+                                        Any]] = None) -> bool:
         """
         :说明:
 
@@ -65,6 +77,8 @@ class Permission:
 
           * ``bot: Bot``: Bot 对象
           * ``event: Event``: Event 对象
+          * ``stack: Optional[AsyncExitStack]``: 异步上下文栈
+          * ``dependency_cache: Optional[Dict[Callable[..., Any], Any]]``: 依赖缓存
 
         :返回:
 
@@ -73,7 +87,11 @@ class Permission:
         if not self.checkers:
             return True
         results = await asyncio.gather(
-            *map(lambda c: c(bot, event), self.checkers))
+            *(checker(bot=bot,
+                      event=event,
+                      _stack=stack,
+                      _dependency_cache=dependency_cache)
+              for checker in self.checkers))
         return any(results)
 
     def __and__(self, other) -> NoReturn:
@@ -82,31 +100,27 @@ class Permission:
     def __or__(
         self, other: Optional[Union["Permission",
                                     T_PermissionChecker]]) -> "Permission":
-        checkers = self.checkers.copy()
         if other is None:
             return self
         elif isinstance(other, Permission):
-            checkers |= other.checkers
+            return Permission(*self.checkers, *other.checkers)
-        elif asyncio.iscoroutinefunction(other):
-            checkers.add(other)  # type: ignore
         else:
-            checkers.add(run_sync(other))
+            return Permission(*self.checkers, other)
-        return Permission(*checkers)
 
 
-async def _message(bot: "Bot", event: "Event") -> bool:
+async def _message(event: Event) -> bool:
     return event.get_type() == "message"
 
 
-async def _notice(bot: "Bot", event: "Event") -> bool:
+async def _notice(event: Event) -> bool:
     return event.get_type() == "notice"
 
 
-async def _request(bot: "Bot", event: "Event") -> bool:
+async def _request(event: Event) -> bool:
     return event.get_type() == "request"
 
 
-async def _metaevent(bot: "Bot", event: "Event") -> bool:
+async def _metaevent(event: Event) -> bool:
     return event.get_type() == "meta_event"
 
 
@@ -140,14 +154,14 @@ def USER(*user: str, perm: Optional[Permission] = None):
       * ``perm: Optional[Permission]``: 需要同时满足的权限
     """
 
-    async def _user(bot: "Bot", event: "Event") -> bool:
+    async def _user(bot: Bot, event: Event) -> bool:
         return bool(event.get_session_id() in user and
                     (perm is None or await perm(bot, event)))
 
     return Permission(_user)
 
 
-async def _superuser(bot: "Bot", event: "Event") -> bool:
+async def _superuser(bot: Bot, event: Event) -> bool:
     return (event.get_type() == "message" and
             event.get_user_id() in bot.config.superusers)
 

nonebot/plugin/on.py

@@ -2,19 +2,16 @@ import re
 import sys
 import inspect
 from types import ModuleType
-from typing import (TYPE_CHECKING, Any, Set, Dict, List, Type, Tuple, Union,
+from typing import Any, Set, Dict, List, Type, Tuple, Union, Optional
-                    Optional)
 
+from nonebot.adapters import Event
 from nonebot.handler import Handler
 from nonebot.matcher import Matcher
 from .manager import _current_plugin
 from nonebot.permission import Permission
 from nonebot.typing import T_State, T_Handler, T_RuleChecker, T_StateFactory
-from nonebot.rule import (Rule, ArgumentParser, regex, command, keyword,
+from nonebot.rule import (PREFIX_KEY, RAW_CMD_KEY, Rule, ArgumentParser, regex,
-                          endswith, startswith, shell_command)
+                          command, keyword, endswith, startswith, shell_command)
-
-if TYPE_CHECKING:
-    from nonebot.adapters import Bot, Event
 
 
 def _store_matcher(matcher: Type[Matcher]) -> None:
@@ -376,16 +373,16 @@ def on_command(cmd: Union[str, Tuple[str, ...]],
       - ``Type[Matcher]``
     """
 
-    async def _strip_cmd(bot: "Bot", event: "Event", state: T_State):
+    async def _strip_cmd(event: Event, state: T_State):
         message = event.get_message()
         if len(message) < 1:
             return
         segment = message.pop(0)
         segment_text = str(segment).lstrip()
-        if not segment_text.startswith(state["_prefix"]["raw_command"]):
+        if not segment_text.startswith(state[PREFIX_KEY][RAW_CMD_KEY]):
             return
         new_message = message.__class__(
-            segment_text[len(state["_prefix"]["raw_command"]):].lstrip())
+            segment_text[len(state[PREFIX_KEY][RAW_CMD_KEY]):].lstrip())
         for new_segment in reversed(new_message):
             message.insert(0, new_segment)
 
@@ -433,12 +430,11 @@ def on_shell_command(cmd: Union[str, Tuple[str, ...]],
       - ``Type[Matcher]``
     """
 
-    async def _strip_cmd(bot: "Bot", event: "Event", state: T_State):
+    async def _strip_cmd(event: Event, state: T_State):
         message = event.get_message()
         segment = message.pop(0)
         new_message = message.__class__(
-            str(segment)
+            str(segment)[len(state[PREFIX_KEY][RAW_CMD_KEY]):].strip())
-            [len(state["_prefix"]["raw_command"]):].strip())  # type: ignore
         for new_segment in reversed(new_message):
             message.insert(0, new_segment)
 

nonebot/plugins/echo.py

@@ -3,14 +3,14 @@ from functools import reduce
 from nonebot.rule import to_me
 from nonebot.plugin import on_command
 from nonebot.permission import SUPERUSER
-from nonebot.adapters.cqhttp import (Bot, Message, MessageEvent, MessageSegment,
+from nonebot.adapters.cqhttp import (Message, MessageEvent, MessageSegment,
                                      unescape)
 
 say = on_command("say", to_me(), permission=SUPERUSER)
 
 
 @say.handle()
-async def say_unescape(bot: Bot, event: MessageEvent):
+async def say_unescape(event: MessageEvent):
 
     def _unescape(message: Message, segment: MessageSegment):
         if segment.is_text():
@@ -18,12 +18,12 @@ async def say_unescape(bot: Bot, event: MessageEvent):
         return message.append(segment)
 
     message = reduce(_unescape, event.get_message(), Message())  # type: ignore
-    await bot.send(message=message, event=event)
+    await say.send(message=message)
 
 
 echo = on_command("echo", to_me())
 
 
 @echo.handle()
-async def echo_escape(bot: Bot, event: MessageEvent):
+async def echo_escape(event: MessageEvent):
-    await bot.send(message=event.get_message(), event=event)
+    await echo.send(message=event.get_message())

nonebot/plugins/single_session.py

@@ -1,8 +1,6 @@
-from typing import Dict, Optional
+from typing import Dict
 
-from nonebot.typing import T_State
+from nonebot.adapters import Event
-from nonebot.matcher import Matcher
-from nonebot.adapters import Bot, Event
 from nonebot.message import (IgnoredException, run_preprocessor,
                              run_postprocessor)
 
@@ -10,7 +8,7 @@ _running_matcher: Dict[str, int] = {}
 
 
 @run_preprocessor
-async def preprocess(matcher: Matcher, bot: Bot, event: Event, state: T_State):
+async def preprocess(event: Event):
     try:
         session_id = event.get_session_id()
     except Exception:
@@ -24,8 +22,7 @@ async def preprocess(matcher: Matcher, bot: Bot, event: Event, state: T_State):
 
 
 @run_postprocessor
-async def postprocess(matcher: Matcher, exception: Optional[Exception],
+async def postprocess(event: Event):
-                      bot: Bot, event: Event, state: T_State):
     try:
         session_id = event.get_session_id()
     except Exception:

nonebot/py.typed

@@ -1 +0,0 @@
-

nonebot/rule.py

@@ -2,10 +2,10 @@ r"""
 规则
 ====
 
-每个事件响应器 ``Matcher`` 拥有一个匹配规则 ``Rule`` ，其中是 **异步** ``RuleChecker`` 的集合，只有当所有 ``RuleChecker`` 检查结果为 ``True`` 时继续运行。
+每个事件响应器 ``Matcher`` 拥有一个匹配规则 ``Rule`` ，其中是 ``RuleChecker`` 的集合，只有当所有 ``RuleChecker`` 检查结果为 ``True`` 时继续运行。
 
 \:\:\:tip 提示
-``RuleChecker`` 既可以是 async function 也可以是 sync function，但在最终会被 ``nonebot.utils.run_sync`` 转换为 async function
+``RuleChecker`` 既可以是 async function 也可以是 sync function
 \:\:\:
 """
 
@@ -14,20 +14,36 @@ import shlex
 import asyncio
 from itertools import product
 from argparse import Namespace
+from contextlib import AsyncExitStack
+from typing_extensions import TypedDict
 from argparse import ArgumentParser as ArgParser
-from typing import (TYPE_CHECKING, Any, Dict, Tuple, Union, Callable, NoReturn,
+from typing import (Any, Dict, List, Type, Tuple, Union, Callable, NoReturn,
-                    Optional, Sequence, Awaitable)
+                    Optional, Sequence)
 
 from pygtrie import CharTrie
 
-from nonebot import get_driver
 from nonebot.log import logger
-from nonebot.utils import run_sync
+from nonebot.handler import Handler
+from nonebot import params, get_driver
 from nonebot.exception import ParserExit
 from nonebot.typing import T_State, T_RuleChecker
+from nonebot.adapters import Bot, Event, MessageSegment
 
-if TYPE_CHECKING:
+PREFIX_KEY = "_prefix"
-    from nonebot.adapters import Bot, Event
+SUFFIX_KEY = "_suffix"
+CMD_KEY = "command"
+RAW_CMD_KEY = "raw_command"
+CMD_RESULT = TypedDict("CMD_RESULT", {
+    "command": Optional[Tuple[str, ...]],
+    "raw_command": Optional[str]
+})
+
+SHELL_ARGS = "_args"
+SHELL_ARGV = "_argv"
+
+REGEX_MATCHED = "_matched"
+REGEX_GROUP = "_matched_groups"
+REGEX_DICT = "_matched_dict"
 
 
 class Rule:
@@ -47,16 +63,22 @@ class Rule:
     """
     __slots__ = ("checkers",)
 
-    def __init__(
+    HANDLER_PARAM_TYPES = [
-        self, *checkers: Callable[["Bot", "Event", T_State],
+        params.BotParam, params.EventParam, params.StateParam,
-                                  Awaitable[bool]]) -> None:
+        params.DefaultParam
+    ]
+
+    def __init__(self, *checkers: Union[T_RuleChecker, Handler]) -> None:
         """
         :参数:
 
-          * ``*checkers: Callable[[Bot, Event, T_State], Awaitable[bool]]``: **异步** RuleChecker
+          * ``*checkers: Union[T_RuleChecker, Handler]``: RuleChecker
 
         """
-        self.checkers = set(checkers)
+        self.checkers = set(
+            checker if isinstance(checker, Handler) else Handler(
+                checker, allow_types=self.HANDLER_PARAM_TYPES)
+            for checker in checkers)
         """
         :说明:
 
@@ -64,11 +86,17 @@ class Rule:
 
         :类型:
 
-          * ``Set[Callable[[Bot, Event, T_State], Awaitable[bool]]]``
+          * ``Set[Handler]``
         """
 
-    async def __call__(self, bot: "Bot", event: "Event",
+    async def __call__(
-                       state: T_State) -> bool:
+        self,
+        bot: Bot,
+        event: Event,
+        state: T_State,
+        stack: Optional[AsyncExitStack] = None,
+        dependency_cache: Optional[Dict[Callable[..., Any],
+                                        Any]] = None) -> bool:
         """
         :说明:
 
@@ -79,26 +107,31 @@ class Rule:
           * ``bot: Bot``: Bot 对象
           * ``event: Event``: Event 对象
           * ``state: T_State``: 当前 State
+          * ``stack: Optional[AsyncExitStack]``: 异步上下文栈
+          * ``dependency_cache: Optional[Dict[Callable[..., Any], Any]]``: 依赖缓存
 
         :返回:
 
           - ``bool``
         """
+        if not self.checkers:
+            return True
         results = await asyncio.gather(
-            *map(lambda c: c(bot, event, state), self.checkers))
+            *(checker(bot=bot,
+                      event=event,
+                      state=state,
+                      _stack=stack,
+                      _dependency_cache=dependency_cache)
+              for checker in self.checkers))
         return all(results)
 
     def __and__(self, other: Optional[Union["Rule", T_RuleChecker]]) -> "Rule":
-        checkers = self.checkers.copy()
         if other is None:
             return self
         elif isinstance(other, Rule):
-            checkers |= other.checkers
+            return Rule(*self.checkers, *other.checkers)
-        elif asyncio.iscoroutinefunction(other):
-            checkers.add(other)  # type: ignore
         else:
-            checkers.add(run_sync(other))
+            return Rule(*self.checkers, other)
-        return Rule(*checkers)
 
     def __or__(self, other) -> NoReturn:
         raise RuntimeError("Or operation between rules is not allowed.")
@@ -123,58 +156,28 @@ class TrieRule:
         cls.suffix[suffix[::-1]] = value
 
     @classmethod
-    def get_value(cls, bot: "Bot", event: "Event",
+    def get_value(cls, bot: Bot, event: Event,
-                  state: T_State) -> Tuple[Dict[str, Any], Dict[str, Any]]:
+                  state: T_State) -> Tuple[CMD_RESULT, CMD_RESULT]:
+        prefix = CMD_RESULT(command=None, raw_command=None)
+        suffix = CMD_RESULT(command=None, raw_command=None)
+        state[PREFIX_KEY] = prefix
+        state[SUFFIX_KEY] = suffix
         if event.get_type() != "message":
-            state["_prefix"] = {"raw_command": None, "command": None}
+            return prefix, suffix
-            state["_suffix"] = {"raw_command": None, "command": None}
-            return {
-                "raw_command": None,
-                "command": None
-            }, {
-                "raw_command": None,
-                "command": None
-            }
 
-        prefix = None
-        suffix = None
         message = event.get_message()
-        message_seg = message[0]
+        message_seg: MessageSegment = message[0]
         if message_seg.is_text():
-            prefix = cls.prefix.longest_prefix(str(message_seg).lstrip())
+            pf = cls.prefix.longest_prefix(str(message_seg).lstrip())
-        message_seg_r = message[-1]
+            prefix[RAW_CMD_KEY] = pf.key
+            prefix[CMD_KEY] = pf.value
+        message_seg_r: MessageSegment = message[-1]
         if message_seg_r.is_text():
-            suffix = cls.suffix.longest_prefix(
+            sf = cls.suffix.longest_prefix(str(message_seg_r).rstrip()[::-1])
-                str(message_seg_r).rstrip()[::-1])
+            suffix[RAW_CMD_KEY] = sf.key
+            suffix[CMD_KEY] = sf.value
 
-        state["_prefix"] = {
+        return prefix, suffix
-            "raw_command": prefix.key,
-            "command": prefix.value
-        } if prefix else {
-            "raw_command": None,
-            "command": None
-        }
-        state["_suffix"] = {
-            "raw_command": suffix.key,
-            "command": suffix.value
-        } if suffix else {
-            "raw_command": None,
-            "command": None
-        }
-
-        return ({
-            "raw_command": prefix.key,
-            "command": prefix.value
-        } if prefix else {
-            "raw_command": None,
-            "command": None
-        }, {
-            "raw_command": suffix.key,
-            "command": suffix.value
-        } if suffix else {
-            "raw_command": None,
-            "command": None
-        })
 
 
 def startswith(msg: Union[str, Tuple[str, ...]],
@@ -195,7 +198,7 @@ def startswith(msg: Union[str, Tuple[str, ...]],
         f"^(?:{'|'.join(re.escape(prefix) for prefix in msg)})",
         re.IGNORECASE if ignorecase else 0)
 
-    async def _startswith(bot: "Bot", event: "Event", state: T_State) -> bool:
+    async def _startswith(bot: Bot, event: Event, state: T_State) -> bool:
         if event.get_type() != "message":
             return False
         text = event.get_plaintext()
@@ -222,7 +225,7 @@ def endswith(msg: Union[str, Tuple[str, ...]],
         f"(?:{'|'.join(re.escape(prefix) for prefix in msg)})$",
         re.IGNORECASE if ignorecase else 0)
 
-    async def _endswith(bot: "Bot", event: "Event", state: T_State) -> bool:
+    async def _endswith(bot: Bot, event: Event, state: T_State) -> bool:
         if event.get_type() != "message":
             return False
         text = event.get_plaintext()
@@ -242,7 +245,7 @@ def keyword(*keywords: str) -> Rule:
       * ``*keywords: str``: 关键词
     """
 
-    async def _keyword(bot: "Bot", event: "Event", state: T_State) -> bool:
+    async def _keyword(event: Event) -> bool:
         if event.get_type() != "message":
             return False
         text = event.get_plaintext()
@@ -290,8 +293,8 @@ def command(*cmds: Union[str, Tuple[str, ...]]) -> Rule:
             for start, sep in product(command_start, command_sep):
                 TrieRule.add_prefix(f"{start}{sep.join(command)}", command)
 
-    async def _command(bot: "Bot", event: "Event", state: T_State) -> bool:
+    async def _command(state: T_State) -> bool:
-        return state["_prefix"]["command"] in commands
+        return state[PREFIX_KEY][CMD_KEY] in commands
 
     return Rule(_command)
 
@@ -310,7 +313,7 @@ class ArgumentParser(ArgParser):
         old_message += message
         setattr(self, "message", old_message)
 
-    def exit(self, status=0, message=None):
+    def exit(self, status: int = 0, message: Optional[str] = None):
         raise ParserExit(status=status,
                          message=message or getattr(self, "message", None))
 
@@ -376,19 +379,18 @@ def shell_command(*cmds: Union[str, Tuple[str, ...]],
             for start, sep in product(command_start, command_sep):
                 TrieRule.add_prefix(f"{start}{sep.join(command)}", command)
 
-    async def _shell_command(bot: "Bot", event: "Event",
+    async def _shell_command(event: Event, state: T_State) -> bool:
-                             state: T_State) -> bool:
+        if state[PREFIX_KEY][CMD_KEY] in commands:
-        if state["_prefix"]["command"] in commands:
             message = str(event.get_message())
-            strip_message = message[len(state["_prefix"]["raw_command"]
+            strip_message = message[len(state[PREFIX_KEY][RAW_CMD_KEY]
                                        ):].lstrip()
-            state["argv"] = shlex.split(strip_message)
+            state[SHELL_ARGV] = shlex.split(strip_message)
             if parser:
                 try:
-                    args = parser.parse_args(state["argv"])
+                    args = parser.parse_args(state[SHELL_ARGV])
-                    state["args"] = args
+                    state[SHELL_ARGS] = args
                 except ParserExit as e:
-                    state["args"] = e
+                    state[SHELL_ARGS] = e
             return True
         else:
             return False
@@ -417,14 +419,14 @@ def regex(regex: str, flags: Union[int, re.RegexFlag] = 0) -> Rule:
 
     pattern = re.compile(regex, flags)
 
-    async def _regex(bot: "Bot", event: "Event", state: T_State) -> bool:
+    async def _regex(event: Event, state: T_State) -> bool:
         if event.get_type() != "message":
             return False
         matched = pattern.search(str(event.get_message()))
         if matched:
-            state["_matched"] = matched.group()
+            state[REGEX_MATCHED] = matched.group()
-            state["_matched_groups"] = matched.groups()
+            state[REGEX_GROUP] = matched.groups()
-            state["_matched_dict"] = matched.groupdict()
+            state[REGEX_DICT] = matched.groupdict()
             return True
         else:
             return False
@@ -432,6 +434,10 @@ def regex(regex: str, flags: Union[int, re.RegexFlag] = 0) -> Rule:
     return Rule(_regex)
 
 
+async def _to_me(event: Event) -> bool:
+    return event.is_tome()
+
+
 def to_me() -> Rule:
     """
     :说明:
@@ -443,7 +449,4 @@ def to_me() -> Rule:
       * 无
     """
 
-    async def _to_me(bot: "Bot", event: "Event", state: T_State) -> bool:
-        return event.is_tome()
-
     return Rule(_to_me)

nonebot/typing.py

@@ -17,16 +17,15 @@
 .. _typing:
     https://docs.python.org/3/library/typing.html
 """
-from collections.abc import Callable as BaseCallable
+
 from typing import (TYPE_CHECKING, Any, Dict, Union, TypeVar, Callable,
                     NoReturn, Optional, Awaitable)
 
 if TYPE_CHECKING:
-    from nonebot.matcher import Matcher
     from nonebot.adapters import Bot, Event
     from nonebot.permission import Permission
 
-T_Wrapped = TypeVar("T_Wrapped", bound=BaseCallable)
+T_Wrapped = TypeVar("T_Wrapped", bound=Callable)
 
 
 def overrides(InterfaceClass: object):
@@ -90,77 +89,109 @@ T_CalledAPIHook = Callable[
   ``bot.call_api`` 后执行的函数，参数分别为 bot, exception, api, data, result
 """
 
-T_EventPreProcessor = Callable[["Bot", "Event", T_State], Awaitable[None]]
+T_EventPreProcessor = Callable[..., Union[None, Awaitable[None]]]
 """
-:类型: ``Callable[[Bot, Event, T_State], Awaitable[None]]``
+:类型: ``Callable[..., Union[None, Awaitable[None]]]``
+
+:依赖参数:
+
+  * ``BotParam``: Bot 对象
+  * ``EventParam``: Event 对象
+  * ``StateParam``: State 对象
 
 :说明:
 
   事件预处理函数 EventPreProcessor 类型
 """
-T_EventPostProcessor = Callable[["Bot", "Event", T_State], Awaitable[None]]
+T_EventPostProcessor = Callable[..., Union[None, Awaitable[None]]]
 """
-:类型: ``Callable[[Bot, Event, T_State], Awaitable[None]]``
+:类型: ``Callable[..., Union[None, Awaitable[None]]]``
+
+:依赖参数:
+
+  * ``BotParam``: Bot 对象
+  * ``EventParam``: Event 对象
+  * ``StateParam``: State 对象
 
 :说明:
 
   事件预处理函数 EventPostProcessor 类型
 """
-T_RunPreProcessor = Callable[["Matcher", "Bot", "Event", T_State],
+T_RunPreProcessor = Callable[..., Union[None, Awaitable[None]]]
-                             Awaitable[None]]
 """
-:类型: ``Callable[[Matcher, Bot, Event, T_State], Awaitable[None]]``
+:类型: ``Callable[..., Union[None, Awaitable[None]]]``
+
+:依赖参数:
+
+  * ``BotParam``: Bot 对象
+  * ``EventParam``: Event 对象
+  * ``StateParam``: State 对象
+  * ``MatcherParam``: Matcher 对象
 
 :说明:
 
   事件响应器运行前预处理函数 RunPreProcessor 类型
 """
-T_RunPostProcessor = Callable[
+T_RunPostProcessor = Callable[..., Union[None, Awaitable[None]]]
-    ["Matcher", Optional[Exception], "Bot", "Event", T_State], Awaitable[None]]
 """
-:类型: ``Callable[[Matcher, Optional[Exception], Bot, Event, T_State], Awaitable[None]]``
+:类型: ``Callable[..., Union[None, Awaitable[None]]]``
+
+:依赖参数:
+
+  * ``BotParam``: Bot 对象
+  * ``EventParam``: Event 对象
+  * ``StateParam``: State 对象
+  * ``MatcherParam``: Matcher 对象
+  * ``ExceptionParam``: 异常对象（可能为 None）
 
 :说明:
 
   事件响应器运行前预处理函数 RunPostProcessor 类型，第二个参数为运行时产生的错误（如果存在）
 """
 
-T_RuleChecker = Callable[["Bot", "Event", T_State], Union[bool,
+T_RuleChecker = Callable[..., Union[bool, Awaitable[bool]]]
-                                                          Awaitable[bool]]]
 """
-:类型: ``Callable[[Bot, Event, T_State], Union[bool, Awaitable[bool]]]``
+:类型: ``Callable[..., Union[bool, Awaitable[bool]]]``
+
+:依赖参数:
+
+  * ``BotParam``: Bot 对象
+  * ``EventParam``: Event 对象
+  * ``StateParam``: State 对象
 
 :说明:
 
   RuleChecker 即判断是否响应事件的处理函数。
 """
-T_PermissionChecker = Callable[["Bot", "Event"], Union[bool, Awaitable[bool]]]
+T_PermissionChecker = Callable[..., Union[bool, Awaitable[bool]]]
 """
-:类型: ``Callable[[Bot, Event], Union[bool, Awaitable[bool]]]``
+:类型: ``Callable[..., Union[bool, Awaitable[bool]]]``
+
+:依赖参数:
+
+  * ``BotParam``: Bot 对象
+  * ``EventParam``: Event 对象
 
 :说明:
 
   RuleChecker 即判断是否响应消息的处理函数。
 """
 
-T_Handler = Union[Callable[[Any, Any, Any, Any], Union[Awaitable[None],
+T_Handler = Callable[..., Any]
-                                                       Awaitable[NoReturn]]],
-                  Callable[[Any, Any, Any], Union[Awaitable[None],
-                                                  Awaitable[NoReturn]]],
-                  Callable[[Any, Any], Union[Awaitable[None],
-                                             Awaitable[NoReturn]]],
-                  Callable[[Any], Union[Awaitable[None], Awaitable[NoReturn]]]]
 """
-:类型:
+:类型: ``Callable[..., Any]``
-
-  * ``Callable[[Bot, Event, T_State], Union[Awaitable[None], Awaitable[NoReturn]]]``
-  * ``Callable[[Bot, Event], Union[Awaitable[None], Awaitable[NoReturn]]]``
-  * ``Callable[[Bot, T_State], Union[Awaitable[None], Awaitable[NoReturn]]]``
-  * ``Callable[[Bot], Union[Awaitable[None], Awaitable[NoReturn]]]``
 
 :说明:
 
-  Handler 即事件的处理函数。
+  Handler 处理函数。
+"""
+T_DependencyCache = Dict[T_Handler, Any]
+"""
+:类型: ``Dict[T_Handler, Any]``
+
+:说明:
+
+  依赖缓存, 用于存储依赖函数的返回值
 """
 T_ArgsParser = Callable[["Bot", "Event", T_State], Union[Awaitable[None],
                                                          Awaitable[NoReturn]]]

nonebot/utils.py

@@ -1,13 +1,23 @@
 import re
 import json
 import asyncio
+import inspect
+import collections
 import dataclasses
 from functools import wraps, partial
-from typing import Any, Callable, Optional, Awaitable
+from contextlib import asynccontextmanager
+from typing_extensions import GenericAlias  # type: ignore
+from typing_extensions import ParamSpec, get_args, get_origin
+from typing import (Any, Type, Deque, Tuple, Union, TypeVar, Callable, Optional,
+                    Awaitable, AsyncGenerator, ContextManager)
 
 from nonebot.log import logger
 from nonebot.typing import overrides
 
+P = ParamSpec("P")
+R = TypeVar("R")
+T = TypeVar("T")
+
 
 def escape_tag(s: str) -> str:
     """
@@ -26,7 +36,48 @@ def escape_tag(s: str) -> str:
     return re.sub(r"</?((?:[fb]g\s)?[^<>\s]*)>", r"\\\g<0>", s)
 
 
-def run_sync(func: Callable[..., Any]) -> Callable[..., Awaitable[Any]]:
+def generic_check_issubclass(
+        cls: Any, class_or_tuple: Union[Type[Any], Tuple[Type[Any],
+                                                         ...]]) -> bool:
+    try:
+        return issubclass(cls, class_or_tuple)
+    except TypeError:
+        if get_origin(cls) is Union:
+            for type_ in get_args(cls):
+                if type_ is not type(None) and not generic_check_issubclass(
+                        type_, class_or_tuple):
+                    return False
+            return True
+        elif isinstance(cls, GenericAlias):
+            origin = get_origin(cls)
+            return bool(origin and issubclass(origin, class_or_tuple))
+        raise
+
+
+def is_coroutine_callable(func: Callable[..., Any]) -> bool:
+    if inspect.isroutine(func):
+        return inspect.iscoroutinefunction(func)
+    if inspect.isclass(func):
+        return False
+    func_ = getattr(func, "__call__", None)
+    return inspect.iscoroutinefunction(func_)
+
+
+def is_gen_callable(func: Callable[..., Any]) -> bool:
+    if inspect.isgeneratorfunction(func):
+        return True
+    func_ = getattr(func, "__call__", None)
+    return inspect.isgeneratorfunction(func_)
+
+
+def is_async_gen_callable(func: Callable[..., Any]) -> bool:
+    if inspect.isasyncgenfunction(func):
+        return True
+    func_ = getattr(func, "__call__", None)
+    return inspect.isasyncgenfunction(func_)
+
+
+def run_sync(func: Callable[P, R]) -> Callable[P, Awaitable[R]]:
     """
     :说明:
 
@@ -34,15 +85,15 @@ def run_sync(func: Callable[..., Any]) -> Callable[..., Awaitable[Any]]:
 
     :参数:
 
-      * ``func: Callable[..., Any]``: 被装饰的同步函数
+      * ``func: Callable[P, R]``: 被装饰的同步函数
 
     :返回:
 
-      - ``Callable[..., Awaitable[Any]]``
+      - ``Callable[P, Awaitable[R]]``
     """
 
     @wraps(func)
-    async def _wrapper(*args: Any, **kwargs: Any) -> Any:
+    async def _wrapper(*args: P.args, **kwargs: P.kwargs) -> R:
         loop = asyncio.get_running_loop()
         pfunc = partial(func, *args, **kwargs)
         result = await loop.run_in_executor(None, pfunc)
@@ -51,6 +102,98 @@ def run_sync(func: Callable[..., Any]) -> Callable[..., Awaitable[Any]]:
     return _wrapper
 
 
+@asynccontextmanager
+async def run_sync_ctx_manager(
+    cm: ContextManager[T],) -> AsyncGenerator[T, None]:
+    try:
+        yield await run_sync(cm.__enter__)()
+    except Exception as e:
+        ok = await run_sync(cm.__exit__)(type(e), e, None)
+        if not ok:
+            raise e
+    else:
+        await run_sync(cm.__exit__)(None, None, None)
+
+
+def get_name(obj: Any) -> str:
+    if inspect.isfunction(obj) or inspect.isclass(obj):
+        return obj.__name__
+    return obj.__class__.__name__
+
+
+class CacheLock:
+
+    def __init__(self):
+        self._waiters: Optional[Deque[asyncio.Future]] = None
+        self._locked = False
+
+    def __repr__(self):
+        extra = "locked" if self._locked else "unlocked"
+        if self._waiters:
+            extra = f"{extra}, waiters: {len(self._waiters)}"
+        return f"<{self.__class__.__name__} [{extra}]>"
+
+    async def __aenter__(self):
+        await self.acquire()
+        return None
+
+    async def __aexit__(self, exc_type, exc, tb):
+        self.release()
+
+    def locked(self):
+        return self._locked
+
+    async def acquire(self):
+        if (not self._locked and (self._waiters is None or
+                                  all(w.cancelled() for w in self._waiters))):
+            self._locked = True
+            return True
+
+        if self._waiters is None:
+            self._waiters = collections.deque()
+
+        loop = asyncio.get_running_loop()
+        future = loop.create_future()
+        self._waiters.append(future)
+
+        # Finally block should be called before the CancelledError
+        # handling as we don't want CancelledError to call
+        # _wake_up_first() and attempt to wake up itself.
+        try:
+            try:
+                await future
+            finally:
+                self._waiters.remove(future)
+        except asyncio.CancelledError:
+            if not self._locked:
+                self._wake_up_first()
+            raise
+
+        self._locked = True
+        return True
+
+    def release(self):
+        if self._locked:
+            self._locked = False
+            self._wake_up_first()
+        else:
+            raise RuntimeError("Lock is not acquired.")
+
+    def _wake_up_first(self):
+        if not self._waiters:
+            return
+        try:
+            future = next(iter(self._waiters))
+        except StopIteration:
+            return
+
+        # .done() necessarily means that a waiter will wake up later on and
+        # either take the lock, or, if it was cancelled and lock wasn't
+        # taken already, will hit this again and wake up a new waiter.
+        if not future.done():
+            future.set_result(True)
+
+
 class DataclassEncoder(json.JSONEncoder):
     """
     :说明:

packages/nonebot-adapter-cqhttp/nonebot/adapters/cqhttp/event.py

@@ -5,13 +5,12 @@ from typing import TYPE_CHECKING, List, Type, Optional
 from pydantic import BaseModel
 from pygtrie import StringTrie
 
+from .message import Message
 from nonebot.typing import overrides
 from nonebot.utils import escape_tag
-from nonebot.exception import NoLogException
+from .exception import NoLogException
 from nonebot.adapters import Event as BaseEvent
 
-from .message import Message
-
 if TYPE_CHECKING:
     from .bot import Bot
 

packages/nonebot-adapter-cqhttp/nonebot/adapters/cqhttp/exception.py

@@ -1,9 +1,10 @@
 from typing import Optional
 
-from nonebot.exception import (AdapterException, ActionFailed as
+from nonebot.exception import AdapterException
-                               BaseActionFailed, NetworkError as
+from nonebot.exception import ActionFailed as BaseActionFailed
-                               BaseNetworkError, ApiNotAvailable as
+from nonebot.exception import NetworkError as BaseNetworkError
-                               BaseApiNotAvailable)
+from nonebot.exception import NoLogException as BaseNoLogException
+from nonebot.exception import ApiNotAvailable as BaseApiNotAvailable
 
 
 class CQHTTPAdapterException(AdapterException):
@@ -12,6 +13,10 @@ class CQHTTPAdapterException(AdapterException):
         super().__init__("cqhttp")
 
 
+class NoLogException(BaseNoLogException, CQHTTPAdapterException):
+    pass
+
+
 class ActionFailed(BaseActionFailed, CQHTTPAdapterException):
     """
     :说明:

packages/nonebot-adapter-cqhttp/nonebot/adapters/cqhttp/permission.py

@@ -1,26 +1,21 @@
-from typing import TYPE_CHECKING
+from nonebot.adapters import Event
-
 from nonebot.permission import Permission
-
+from .event import GroupMessageEvent, PrivateMessageEvent
-from .event import PrivateMessageEvent, GroupMessageEvent
-
-if TYPE_CHECKING:
-    from nonebot.adapters import Bot, Event
 
 
-async def _private(bot: "Bot", event: "Event") -> bool:
+async def _private(event: Event) -> bool:
     return isinstance(event, PrivateMessageEvent)
 
 
-async def _private_friend(bot: "Bot", event: "Event") -> bool:
+async def _private_friend(event: Event) -> bool:
     return isinstance(event, PrivateMessageEvent) and event.sub_type == "friend"
 
 
-async def _private_group(bot: "Bot", event: "Event") -> bool:
+async def _private_group(event: Event) -> bool:
     return isinstance(event, PrivateMessageEvent) and event.sub_type == "group"
 
 
-async def _private_other(bot: "Bot", event: "Event") -> bool:
+async def _private_other(event: Event) -> bool:
     return isinstance(event, PrivateMessageEvent) and event.sub_type == "other"
 
 
@@ -42,20 +37,20 @@ PRIVATE_OTHER = Permission(_private_other)
 """
 
 
-async def _group(bot: "Bot", event: "Event") -> bool:
+async def _group(event: Event) -> bool:
     return isinstance(event, GroupMessageEvent)
 
 
-async def _group_member(bot: "Bot", event: "Event") -> bool:
+async def _group_member(event: Event) -> bool:
     return isinstance(event,
                       GroupMessageEvent) and event.sender.role == "member"
 
 
-async def _group_admin(bot: "Bot", event: "Event") -> bool:
+async def _group_admin(event: Event) -> bool:
     return isinstance(event, GroupMessageEvent) and event.sender.role == "admin"
 
 
-async def _group_owner(bot: "Bot", event: "Event") -> bool:
+async def _group_owner(event: Event) -> bool:
     return isinstance(event, GroupMessageEvent) and event.sender.role == "owner"
 
 

pages/changelog.md

@@ -4,11 +4,13 @@ sidebar: auto
 
 # 更新日志
 
-## v2.0.0a17
+## v2.0.0b1
 
 - 新增 `MessageTemplate` 对于 `str` 普通模板的支持
 - 移除插件加载的 `NameSpace` 模式
 - 修改 toml 加载插件时的键名为 `tool.nonebot` 以符合规范
+- 新增 Handler 依赖注入支持
+- 统一 `Processor`, `Rule`, `Permission` 使用 `Handler`
 
 ## v2.0.0a16
 

poetry.lock

@@ -33,7 +33,7 @@ python-versions = ">=3.6,<4.0"
 
 [[package]]
 name = "aiohttp"
-version = "3.8.0"
+version = "3.8.1"
 description = "Async http client/server framework (asyncio)"
 category = "main"
 optional = true
@@ -297,7 +297,7 @@ python-versions = ">=3.5"
 
 [[package]]
 name = "httpcore"
-version = "0.13.7"
+version = "0.14.2"
 description = "A minimal low-level HTTP client."
 category = "main"
 optional = false
@@ -305,6 +305,7 @@ python-versions = ">=3.6"
 
 [package.dependencies]
 anyio = ">=3.0.0,<4.0.0"
+certifi = "*"
 h11 = ">=0.11,<0.13"
 sniffio = ">=1.0.0,<2.0.0"
 
@@ -324,7 +325,7 @@ test = ["Cython (==0.29.22)"]
 
 [[package]]
 name = "httpx"
-version = "0.20.0"
+version = "0.21.1"
 description = "The next generation HTTP client."
 category = "main"
 optional = false
@@ -334,7 +335,7 @@ python-versions = ">=3.6"
 certifi = "*"
 charset-normalizer = "*"
 h2 = {version = ">=3,<5", optional = true, markers = "extra == \"http2\""}
-httpcore = ">=0.13.3,<0.14.0"
+httpcore = ">=0.14.0,<0.15.0"
 rfc3986 = {version = ">=1.3,<2", extras = ["idna2008"]}
 sniffio = "*"
 
@@ -771,7 +772,7 @@ python-versions = ">=3.5"
 
 [[package]]
 name = "snowballstemmer"
-version = "2.1.0"
+version = "2.2.0"
 description = "This package provides 29 stemmers for 28 languages generated from Snowball algorithms."
 category = "dev"
 optional = false
@@ -828,7 +829,7 @@ yapf = "*"
 type = "git"
 url = "https://github.com/nonebot/sphinx-markdown-builder.git"
 reference = "master"
-resolved_reference = "7a8c8a66dfe42436b4584d1d13f5d0127fc83301"
+resolved_reference = "2204923f5938a8f7354c6a69ed58079edd180a43"
 
 [[package]]
 name = "sphinxcontrib-applehelp"
@@ -934,11 +935,11 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "typing-extensions"
-version = "3.10.0.2"
+version = "4.0.0"
-description = "Backported and Experimental Type Hints for Python 3.5+"
+description = "Backported and Experimental Type Hints for Python 3.6+"
 category = "main"
 optional = false
-python-versions = "*"
+python-versions = ">=3.6"
 
 [[package]]
 name = "unify"
@@ -1019,7 +1020,7 @@ python-versions = ">=3.5"
 
 [[package]]
 name = "websockets"
-version = "10.0"
+version = "10.1"
 description = "An implementation of the WebSocket Protocol (RFC 6455 & 7692)"
 category = "main"
 optional = false
@@ -1099,7 +1100,7 @@ quart = ["Quart"]
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7.3"
-content-hash = "51f4f0ce5ced234a65cae790c4f57486e42d7120972657a3f51e733cb4e7c639"
+content-hash = "537c91f98fd6598dbce8c2942530f18dee0858a896b6f393a684252a77dc76c6"
 
 [metadata.files]
 aiocache = [
@@ -1115,78 +1116,78 @@ aiofiles = [
     {file = "aiofiles-0.7.0.tar.gz", hash = "sha256:a1c4fc9b2ff81568c83e21392a82f344ea9d23da906e4f6a52662764545e19d4"},
 ]
 aiohttp = [
-    {file = "aiohttp-3.8.0-cp310-cp310-macosx_10_9_universal2.whl", hash = "sha256:48f218a5257b6bc16bcf26a91d97ecea0c7d29c811a90d965f3dd97c20f016d6"},
+    {file = "aiohttp-3.8.1-cp310-cp310-macosx_10_9_universal2.whl", hash = "sha256:1ed0b6477896559f17b9eaeb6d38e07f7f9ffe40b9f0f9627ae8b9926ae260a8"},
-    {file = "aiohttp-3.8.0-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:a2fee4d656a7cc9ab47771b2a9e8fad8a9a33331c1b59c3057ecf0ac858f5bfe"},
+    {file = "aiohttp-3.8.1-cp310-cp310-macosx_10_9_x86_64.whl", hash = "sha256:7dadf3c307b31e0e61689cbf9e06be7a867c563d5a63ce9dca578f956609abf8"},
-    {file = "aiohttp-3.8.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:688a1eb8c1a5f7e795c7cb67e0fe600194e6723ba35f138dfae0db20c0cb8f94"},
+    {file = "aiohttp-3.8.1-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:a79004bb58748f31ae1cbe9fa891054baaa46fb106c2dc7af9f8e3304dc30316"},
-    {file = "aiohttp-3.8.0-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:7ba09bb3dcb0b7ec936a485db2b64be44fe14cdce0a5eac56f50e55da3627385"},
+    {file = "aiohttp-3.8.1-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:12de6add4038df8f72fac606dff775791a60f113a725c960f2bab01d8b8e6b15"},
-    {file = "aiohttp-3.8.0-cp310-cp310-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:d7715daf84f10bcebc083ad137e3eced3e1c8e7fa1f096ade9a8d02b08f0d91c"},
+    {file = "aiohttp-3.8.1-cp310-cp310-manylinux_2_17_ppc64le.manylinux2014_ppc64le.whl", hash = "sha256:6f0d5f33feb5f69ddd57a4a4bd3d56c719a141080b445cbf18f238973c5c9923"},
-    {file = "aiohttp-3.8.0-cp310-cp310-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:5e3f81fbbc170418e22918a9585fd7281bbc11d027064d62aa4b507552c92671"},
+    {file = "aiohttp-3.8.1-cp310-cp310-manylinux_2_17_s390x.manylinux2014_s390x.whl", hash = "sha256:eaba923151d9deea315be1f3e2b31cc39a6d1d2f682f942905951f4e40200922"},
-    {file = "aiohttp-3.8.0-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:1fa9f50aa1f114249b7963c98e20dc35c51be64096a85bc92433185f331de9cc"},
+    {file = "aiohttp-3.8.1-cp310-cp310-manylinux_2_5_i686.manylinux1_i686.manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:099ebd2c37ac74cce10a3527d2b49af80243e2a4fa39e7bce41617fbc35fa3c1"},
-    {file = "aiohttp-3.8.0-cp310-cp310-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:8a50150419b741ee048b53146c39c47053f060cb9d98e78be08fdbe942eaa3c4"},
+    {file = "aiohttp-3.8.1-cp310-cp310-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:2e5d962cf7e1d426aa0e528a7e198658cdc8aa4fe87f781d039ad75dcd52c516"},
-    {file = "aiohttp-3.8.0-cp310-cp310-musllinux_1_1_aarch64.whl", hash = "sha256:a84c335337b676d832c1e2bc47c3a97531b46b82de9f959dafb315cbcbe0dfcd"},
+    {file = "aiohttp-3.8.1-cp310-cp310-musllinux_1_1_aarch64.whl", hash = "sha256:fa0ffcace9b3aa34d205d8130f7873fcfefcb6a4dd3dd705b0dab69af6712642"},
-    {file = "aiohttp-3.8.0-cp310-cp310-musllinux_1_1_i686.whl", hash = "sha256:88d4917c30fcd7f6404fb1dc713fa21de59d3063dcc048f4a8a1a90e6bbbd739"},
+    {file = "aiohttp-3.8.1-cp310-cp310-musllinux_1_1_i686.whl", hash = "sha256:61bfc23df345d8c9716d03717c2ed5e27374e0fe6f659ea64edcd27b4b044cf7"},
-    {file = "aiohttp-3.8.0-cp310-cp310-musllinux_1_1_ppc64le.whl", hash = "sha256:b76669b7c058b8020b11008283c3b8e9c61bfd978807c45862956119b77ece45"},
+    {file = "aiohttp-3.8.1-cp310-cp310-musllinux_1_1_ppc64le.whl", hash = "sha256:31560d268ff62143e92423ef183680b9829b1b482c011713ae941997921eebc8"},
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 ]
 werkzeug = [
     {file = "Werkzeug-2.0.2-py3-none-any.whl", hash = "sha256:63d3dc1cf60e7b7e35e97fa9861f7397283b75d765afcaefd993d6046899de8f"},

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "nonebot2"
-version = "2.0.0-alpha.16"
+version = "2.0.0-beta.1"
 description = "An asynchronous python bot framework."
 authors = ["yanyongyu <yyy@nonebot.dev>"]
 license = "MIT"
@@ -28,6 +28,7 @@ pygtrie = "^2.4.1"
 tomlkit = "^0.7.0"
 fastapi = "^0.70.0"
 websockets = ">=9.1"
+typing-extensions = ">=3.10.0,<5.0.0"
 Quart = { version = "^0.15.0", optional = true }
 httpx = { version = ">=0.20.0, <1.0.0", extras = ["http2"] }
 pydantic = { version = "~1.8.0", extras = ["dotenv"] }

tests/test_plugins/test_depends.py

@@ -0,0 +1,28 @@
+from nonebot.log import logger
+from nonebot.dependencies import Depends
+from nonebot import on_command, on_message
+
+test = on_command("123")
+
+
+def depend(state: dict):
+    print("==== depends running =====")
+    return state
+
+
+@test.got("a", prompt="a")
+@test.got("b", prompt="b")
+@test.receive()
+@test.got("c", prompt="c")
+async def _(x: dict = Depends(depend)):
+    logger.info(f"=======, {x}")
+
+
+test_cache1 = on_message()
+test_cache2 = on_message()
+
+
+@test_cache1.handle()
+@test_cache2.handle()
+async def _(x: dict = Depends(depend)):
+    logger.info(f"======= test, {x}")

tests/test_plugins/test_processor.py

@@ -1,15 +1,15 @@
+from nonebot.adapters import Event
 from nonebot.typing import T_State
 from nonebot.matcher import Matcher
-from nonebot.adapters import Bot, Event
+from nonebot.message import run_preprocessor, event_preprocessor
-from nonebot.message import event_preprocessor, run_preprocessor
 
 
 @event_preprocessor
-async def handle(bot: Bot, event: Event, state: T_State):
+async def handle(event: Event, state: T_State):
     state["preprocessed"] = True
     print(type(event), event)
 
 
 @run_preprocessor
-async def run(matcher: Matcher, bot: Bot, event: Event, state: T_State):
+async def run(matcher: Matcher):
     print(matcher)