mirror of
https://github.com/nonebot/nonebot2.git
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243 lines
6.3 KiB
Python
243 lines
6.3 KiB
Python
"""本模块包含了所有 NoneBot 运行时可能会抛出的异常。
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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。
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```bash
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NoneBotException
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├── ParserExit
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├── ProcessException
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| ├── IgnoredException
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| ├── SkippedException
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| | └── TypeMisMatch
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| ├── MockApiException
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| └── StopPropagation
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├── MatcherException
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| ├── PausedException
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| ├── RejectedException
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| └── FinishedException
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├── AdapterException
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| ├── NoLogException
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| ├── ApiNotAvailable
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| ├── NetworkError
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| └── ActionFailed
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└── DriverException
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└── WebSocketClosed
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```
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FrontMatter:
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sidebar_position: 10
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description: nonebot.exception 模块
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"""
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from typing import Any, Optional
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from pydantic.fields import ModelField
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class NoneBotException(Exception):
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"""所有 NoneBot 发生的异常基类。"""
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def __str__(self) -> str:
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return self.__repr__()
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# Rule Exception
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class ParserExit(NoneBotException):
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"""{ref}`nonebot.rule.shell_command` 处理消息失败时返回的异常。"""
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def __init__(self, status: int = 0, message: Optional[str] = None) -> None:
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self.status = status
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self.message = message
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def __repr__(self) -> str:
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return (
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f"ParserExit(status={self.status}"
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+ (f", message={self.message!r}" if self.message else "")
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+ ")"
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)
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# Processor Exception
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class ProcessException(NoneBotException):
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"""事件处理过程中发生的异常基类。"""
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class IgnoredException(ProcessException):
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"""指示 NoneBot 应该忽略该事件。可由 PreProcessor 抛出。
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参数:
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reason: 忽略事件的原因
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"""
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def __init__(self, reason: Any) -> None:
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self.reason: Any = reason
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def __repr__(self) -> str:
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return f"IgnoredException(reason={self.reason!r})"
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class SkippedException(ProcessException):
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"""指示 NoneBot 立即结束当前 `Dependent` 的运行。
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例如,可以在 `Handler` 中通过 {ref}`nonebot.matcher.Matcher.skip` 抛出。
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用法:
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```python
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def always_skip():
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Matcher.skip()
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@matcher.handle()
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async def handler(dependency = Depends(always_skip)):
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# never run
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```
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"""
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class TypeMisMatch(SkippedException):
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"""当前 `Handler` 的参数类型不匹配。"""
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def __init__(self, param: ModelField, value: Any) -> None:
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self.param: ModelField = param
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self.value: Any = value
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def __repr__(self) -> str:
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return (
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f"TypeMisMatch(param={self.param.name}, "
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f"type={self.param._type_display()}, value={self.value!r}>"
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)
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class MockApiException(ProcessException):
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"""指示 NoneBot 阻止本次 API 调用或修改本次调用返回值,并返回自定义内容。
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可由 api hook 抛出。
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参数:
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result: 返回的内容
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"""
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def __init__(self, result: Any):
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self.result = result
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def __repr__(self) -> str:
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return f"MockApiException(result={self.result!r})"
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class StopPropagation(ProcessException):
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"""指示 NoneBot 终止事件向下层传播。
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在 {ref}`nonebot.matcher.Matcher.block` 为 `True`
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或使用 {ref}`nonebot.matcher.Matcher.stop_propagation` 方法时抛出。
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用法:
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```python
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matcher = on_notice(block=True)
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# 或者
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@matcher.handle()
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async def handler(matcher: Matcher):
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matcher.stop_propagation()
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```
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"""
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# Matcher Exceptions
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class MatcherException(NoneBotException):
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"""所有 Matcher 发生的异常基类。"""
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class PausedException(MatcherException):
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"""指示 NoneBot 结束当前 `Handler` 并等待下一条消息后继续下一个 `Handler`。
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可用于用户输入新信息。
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可以在 `Handler` 中通过 {ref}`nonebot.matcher.Matcher.pause` 抛出。
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用法:
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```python
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@matcher.handle()
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async def handler():
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await matcher.pause("some message")
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```
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"""
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class RejectedException(MatcherException):
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"""指示 NoneBot 结束当前 `Handler` 并等待下一条消息后重新运行当前 `Handler`。
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可用于用户重新输入。
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可以在 `Handler` 中通过 {ref}`nonebot.matcher.Matcher.reject` 抛出。
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用法:
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```python
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@matcher.handle()
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async def handler():
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await matcher.reject("some message")
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```
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"""
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class FinishedException(MatcherException):
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"""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。
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可以在 `Handler` 中通过 {ref}`nonebot.matcher.Matcher.finish` 抛出。
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用法:
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```python
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@matcher.handle()
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async def handler():
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await matcher.finish("some message")
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```
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"""
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# Adapter Exceptions
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class AdapterException(NoneBotException):
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"""代表 `Adapter` 抛出的异常,所有的 `Adapter` 都要在内部继承自这个 `Exception`。
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参数:
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adapter_name: 标识 adapter
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"""
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def __init__(self, adapter_name: str, *args: object) -> None:
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super().__init__(*args)
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self.adapter_name: str = adapter_name
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class NoLogException(AdapterException):
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"""指示 NoneBot 对当前 `Event` 进行处理但不显示 Log 信息。
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可在 {ref}`nonebot.adapters.Event.get_log_string` 时抛出
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"""
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class ApiNotAvailable(AdapterException):
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"""在 API 连接不可用时抛出。"""
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class NetworkError(AdapterException):
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"""在网络出现问题时抛出,
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如: API 请求地址不正确, API 请求无返回或返回状态非正常等。
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"""
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class ActionFailed(AdapterException):
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"""API 请求成功返回数据,但 API 操作失败。"""
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# Driver Exceptions
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class DriverException(NoneBotException):
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"""`Driver` 抛出的异常基类。"""
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class WebSocketClosed(DriverException):
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"""WebSocket 连接已关闭。"""
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def __init__(self, code: int, reason: Optional[str] = None) -> None:
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self.code = code
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self.reason = reason
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def __repr__(self) -> str:
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return (
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f"WebSocketClosed(code={self.code}"
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+ (f", reason={self.reason!r}" if self.reason else "")
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+ ")"
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)
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