nonebot2/nonebot/exception.py

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"""
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## 异常
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下列文档中的异常是所有 NoneBot 运行时可能会抛出的
这些异常并非所有需要用户处理 NoneBot 内部运行时被捕获并进行对应操作
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FrontMatter:
sidebar_position: 10
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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"""
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# Rule Exception
class ParserExit(NoneBotException):
"""
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`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):
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 ProcessException(NoneBotException):
"""
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事件处理过程中发生的异常基类
"""
class IgnoredException(ProcessException):
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"""
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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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"""
def __init__(self, reason):
self.reason = reason
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def __repr__(self):
return f"<IgnoredException, reason={self.reason}>"
def __str__(self):
return self.__repr__()
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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可由 api hook 抛出
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参数:
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result: 返回的内容
"""
def __init__(self, result: Any):
self.result = result
def __repr__(self):
return f"<ApiCancelledException, result={self.result}>"
def __str__(self):
return self.__repr__()
class StopPropagation(ProcessException):
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"""
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指示 NoneBot 终止事件向下层传播
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用法:
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`Matcher.block == True` 时抛出
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"""
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# Matcher Exceptions
class MatcherException(NoneBotException):
"""
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所有 Matcher 发生的异常基类
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"""
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class SkippedException(MatcherException):
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"""
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指示 NoneBot 立即结束当前 `Handler` 的处理继续处理下一个 `Handler`
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用法:
可以在 `Handler` 中通过 `Matcher.skip()` 抛出
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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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"""
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def __init__(self, param: ModelField, value: Any):
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self.param: ModelField = param
self.value: Any = value
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def __repr__(self):
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return f"<TypeMisMatch, param={self.param}, value={self.value}>"
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def __str__(self):
self.__repr__()
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class PausedException(MatcherException):
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"""
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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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用法:
可以在 `Handler` 中通过 `Matcher.pause()` 抛出
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"""
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class RejectedException(MatcherException):
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"""
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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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用法:
可以在 `Handler` 中通过 `Matcher.reject()` 抛出
"""
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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
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可用于结束用户会话
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用法:
可以在 `Handler` 中通过 `Matcher.finish()` 抛出
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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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"""
def __init__(self, adapter_name: str) -> None:
self.adapter_name = adapter_name
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class NoLogException(AdapterException):
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"""
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指示 NoneBot 对当前 `Event` 进行处理但不显示 Log 信息可在 `get_log_string` 时抛出
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"""
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pass
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class ApiNotAvailable(AdapterException):
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"""
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API 连接不可用时抛出
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"""
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pass
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class NetworkError(AdapterException):
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"""
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在网络出现问题时抛出: 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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pass
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class ActionFailed(AdapterException):
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"""
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API 请求成功返回数据 API 操作失败
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"""
pass
# Driver Exceptions
class DriverException(NoneBotException):
"""
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`Driver` 抛出的异常基类
"""
class WebSocketClosed(DriverException):
"""
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WebSocket 连接已关闭
"""
def __init__(self, code: int, reason: Optional[str] = None):
self.code = code
self.reason = reason
def __repr__(self) -> str:
return f"<WebSocketClosed code={self.code} reason={self.reason}>"