mirror of
https://github.com/AstrBotDevs/AstrBot
synced 2026-07-16 09:40:30 +08:00
9c5ecf0a13
- Introduced LoadedCapability class to manage plugin capabilities. - Updated load_plugin function to discover and load capabilities alongside handlers. - Enhanced Peer class to handle remote provided capabilities during initialization. - Added tests for capability registration and invocation in legacy plugins. - Improved MessageChain and message component handling in legacy plugins. - Added comprehensive tests for legacy plugin integration and compatibility. - Updated protocol messages to include provided capabilities in initialization. - Enhanced top-level module imports to include capability-related functions.
357 lines
11 KiB
Python
357 lines
11 KiB
Python
"""v4 协议消息模型。
|
||
|
||
这些模型描述的是 `Peer` 与 `Peer` 之间的线协议。握手阶段通过
|
||
`InitializeMessage` 发起，再由 `ResultMessage(kind="initialize_result")`
|
||
返回 `InitializeOutput`；能力调用阶段则使用 `InvokeMessage` / `ResultMessage`
|
||
或 `EventMessage` 序列。
|
||
"""
|
||
|
||
from __future__ import annotations
|
||
|
||
import json
|
||
from typing import Any, Literal
|
||
|
||
from pydantic import BaseModel, ConfigDict, Field, model_validator
|
||
|
||
from .descriptors import CapabilityDescriptor, HandlerDescriptor
|
||
|
||
|
||
class _MessageBase(BaseModel):
|
||
model_config = ConfigDict(extra="forbid")
|
||
|
||
|
||
class ErrorPayload(_MessageBase):
|
||
"""错误载荷，用于 ResultMessage 和 EventMessage 中传递错误信息。
|
||
|
||
与旧版 JSON-RPC 错误对比：
|
||
旧版: code 为整数，如 -32000
|
||
新版: code 为字符串，如 "internal_error"
|
||
|
||
Attributes:
|
||
code: 错误码，字符串类型，便于语义化错误分类
|
||
message: 错误消息，人类可读的错误描述
|
||
hint: 错误提示，可选的解决方案或建议
|
||
retryable: 是否可重试，标识该错误是否可通过重试解决
|
||
"""
|
||
|
||
code: str
|
||
message: str
|
||
hint: str = ""
|
||
retryable: bool = False
|
||
|
||
|
||
class PeerInfo(_MessageBase):
|
||
"""对等节点信息，标识消息发送方的身份。
|
||
|
||
与旧版对比：
|
||
旧版: 通过 handshake params 中的 plugin_name 隐式传递
|
||
新版: 显式的 PeerInfo 结构，支持 plugin 和 core 两种角色
|
||
|
||
Attributes:
|
||
name: 节点名称，通常是插件 ID 或核心标识
|
||
role: 节点角色，"plugin" 或 "core"
|
||
version: 节点版本号，可选
|
||
"""
|
||
|
||
name: str
|
||
role: Literal["plugin", "core"]
|
||
version: str | None = None
|
||
|
||
|
||
class InitializeMessage(_MessageBase):
|
||
"""初始化消息，用于建立连接时交换信息。
|
||
|
||
与旧版 JSON-RPC handshake 对比：
|
||
旧版:
|
||
{
|
||
"jsonrpc": "2.0",
|
||
"id": "xxx",
|
||
"method": "handshake",
|
||
"params": {}
|
||
}
|
||
响应包含插件元信息和处理器列表
|
||
|
||
新版:
|
||
{
|
||
"type": "initialize",
|
||
"id": "xxx",
|
||
"protocol_version": "1.0",
|
||
"peer": {"name": "...", "role": "plugin", "version": "..."},
|
||
"handlers": [...],
|
||
"provided_capabilities": [...],
|
||
"metadata": {...}
|
||
}
|
||
|
||
Attributes:
|
||
type: 消息类型，固定为 "initialize"
|
||
id: 消息 ID，用于关联响应
|
||
protocol_version: 协议版本号
|
||
peer: 发送方节点信息
|
||
handlers: 注册的处理器描述符列表
|
||
provided_capabilities: 发送方对外暴露的能力描述符列表
|
||
metadata: 扩展元数据，可存储插件配置等信息
|
||
"""
|
||
|
||
type: Literal["initialize"] = "initialize"
|
||
id: str
|
||
protocol_version: str
|
||
peer: PeerInfo
|
||
handlers: list[HandlerDescriptor] = Field(default_factory=list)
|
||
provided_capabilities: list[CapabilityDescriptor] = Field(default_factory=list)
|
||
metadata: dict[str, Any] = Field(default_factory=dict)
|
||
|
||
|
||
class InitializeOutput(_MessageBase):
|
||
"""初始化输出，作为 InitializeMessage 的响应数据。
|
||
|
||
与旧版对比：
|
||
旧版: handshake 响应中包含完整的插件信息
|
||
新版: 仅返回对等方信息和能力列表，更简洁
|
||
|
||
Attributes:
|
||
peer: 接收方（核心）节点信息
|
||
capabilities: 核心提供的能力描述符列表
|
||
metadata: 扩展元数据
|
||
"""
|
||
|
||
peer: PeerInfo
|
||
capabilities: list[CapabilityDescriptor] = Field(default_factory=list)
|
||
metadata: dict[str, Any] = Field(default_factory=dict)
|
||
|
||
|
||
class ResultMessage(_MessageBase):
|
||
"""结果消息，用于返回能力调用的结果。
|
||
|
||
与旧版 JSON-RPC 响应对比：
|
||
旧版成功响应:
|
||
{"jsonrpc": "2.0", "id": "xxx", "result": {...}}
|
||
旧版错误响应:
|
||
{"jsonrpc": "2.0", "id": "xxx", "error": {"code": -32000, "message": "..."}}
|
||
|
||
新版成功结果:
|
||
{"type": "result", "id": "xxx", "success": true, "output": {...}}
|
||
新版失败结果:
|
||
{"type": "result", "id": "xxx", "success": false, "error": {...}}
|
||
|
||
Attributes:
|
||
type: 消息类型，固定为 "result"
|
||
id: 关联的请求 ID
|
||
kind: 结果类型，可选，如 "initialize_result" 标识初始化结果
|
||
success: 是否成功
|
||
output: 成功时的输出数据
|
||
error: 失败时的错误信息
|
||
"""
|
||
|
||
type: Literal["result"] = "result"
|
||
id: str
|
||
kind: str | None = None
|
||
success: bool
|
||
output: dict[str, Any] = Field(default_factory=dict)
|
||
error: ErrorPayload | None = None
|
||
|
||
@model_validator(mode="after")
|
||
def validate_result_state(self) -> "ResultMessage":
|
||
"""约束 success / output / error 的组合状态。"""
|
||
if self.success:
|
||
if self.error is not None:
|
||
raise ValueError("success=true 时 error 必须为空")
|
||
return self
|
||
if self.error is None:
|
||
raise ValueError("success=false 时必须提供 error")
|
||
if self.output:
|
||
raise ValueError("success=false 时 output 必须为空")
|
||
return self
|
||
|
||
|
||
class InvokeMessage(_MessageBase):
|
||
"""调用消息，用于请求执行远程能力。
|
||
|
||
与旧版 JSON-RPC 请求对比：
|
||
旧版:
|
||
{
|
||
"jsonrpc": "2.0",
|
||
"id": "xxx",
|
||
"method": "call_handler",
|
||
"params": {"handler_full_name": "...", "event": {...}}
|
||
}
|
||
|
||
新版:
|
||
{
|
||
"type": "invoke",
|
||
"id": "xxx",
|
||
"capability": "handler.invoke",
|
||
"input": {"handler_id": "...", "event": {...}},
|
||
"stream": false
|
||
}
|
||
|
||
Attributes:
|
||
type: 消息类型，固定为 "invoke"
|
||
id: 请求 ID，用于关联响应
|
||
capability: 目标能力名称，格式为 "namespace.action"
|
||
input: 调用输入参数
|
||
stream: 是否期望流式响应，若为 True 将收到 EventMessage 序列
|
||
"""
|
||
|
||
type: Literal["invoke"] = "invoke"
|
||
id: str
|
||
capability: str
|
||
input: dict[str, Any] = Field(default_factory=dict)
|
||
stream: bool = False
|
||
|
||
|
||
class EventMessage(_MessageBase):
|
||
"""事件消息，用于流式调用的状态通知。
|
||
|
||
流式调用生命周期：
|
||
1. started: 调用开始，所有字段为空
|
||
2. delta: 数据增量更新，包含 data 字段
|
||
3. completed: 调用完成，包含 output 字段
|
||
4. failed: 调用失败，包含 error 字段
|
||
|
||
与旧版 JSON-RPC 通知对比：
|
||
旧版使用独立的 method 区分：
|
||
- handler_stream_start
|
||
- handler_stream_update
|
||
- handler_stream_end
|
||
|
||
新版使用统一的 EventMessage，通过 phase 字段区分：
|
||
{"type": "event", "id": "xxx", "phase": "delta", "data": {...}}
|
||
|
||
Attributes:
|
||
type: 消息类型，固定为 "event"
|
||
id: 关联的请求 ID
|
||
phase: 事件阶段，started/delta/completed/failed
|
||
data: 增量数据，仅 delta 阶段有效
|
||
output: 最终输出，仅 completed 阶段有效
|
||
error: 错误信息，仅 failed 阶段有效
|
||
"""
|
||
|
||
type: Literal["event"] = "event"
|
||
id: str
|
||
phase: Literal["started", "delta", "completed", "failed"]
|
||
data: dict[str, Any] = Field(default_factory=dict)
|
||
output: dict[str, Any] = Field(default_factory=dict)
|
||
error: ErrorPayload | None = None
|
||
|
||
@model_validator(mode="after")
|
||
def validate_phase_constraints(self) -> "EventMessage":
|
||
"""验证各 phase 的字段约束。
|
||
|
||
- started: 所有字段必须为空
|
||
- delta: 必须有 data，output/error 必须为空
|
||
- completed: 必须有 output，data/error 必须为空
|
||
- failed: 必须有 error，data/output 必须为空
|
||
"""
|
||
phase = self.phase
|
||
if phase == "started":
|
||
if self.data or self.output or self.error:
|
||
raise ValueError("started phase 必须所有字段为空")
|
||
elif phase == "delta":
|
||
if not self.data:
|
||
raise ValueError("delta phase 需要 data")
|
||
if self.output or self.error:
|
||
raise ValueError("delta phase 的 output/error 必须为空")
|
||
elif phase == "completed":
|
||
if not self.output:
|
||
raise ValueError("completed phase 需要 output")
|
||
if self.data or self.error:
|
||
raise ValueError("completed phase 的 data/error 必须为空")
|
||
elif phase == "failed":
|
||
if self.error is None:
|
||
raise ValueError("failed phase 需要 error")
|
||
if self.data or self.output:
|
||
raise ValueError("failed phase 的 data/output 必须为空")
|
||
return self
|
||
|
||
|
||
class CancelMessage(_MessageBase):
|
||
"""取消消息，用于取消正在进行的调用。
|
||
|
||
与旧版对比：
|
||
旧版: 使用 {"jsonrpc": "2.0", "method": "cancel", "params": {"reason": "..."}}
|
||
新版: 专门的 CancelMessage 类型，语义更明确
|
||
|
||
Attributes:
|
||
type: 消息类型，固定为 "cancel"
|
||
id: 要取消的请求 ID
|
||
reason: 取消原因，默认为 "user_cancelled"
|
||
"""
|
||
|
||
type: Literal["cancel"] = "cancel"
|
||
id: str
|
||
reason: str = "user_cancelled"
|
||
|
||
|
||
ProtocolMessage = (
|
||
InitializeMessage | ResultMessage | InvokeMessage | EventMessage | CancelMessage
|
||
)
|
||
"""协议消息联合类型，所有有效消息类型的联合。"""
|
||
|
||
_PROTOCOL_MESSAGE_MODELS = {
|
||
"initialize": InitializeMessage,
|
||
"result": ResultMessage,
|
||
"invoke": InvokeMessage,
|
||
"event": EventMessage,
|
||
"cancel": CancelMessage,
|
||
}
|
||
|
||
|
||
def parse_message(
|
||
payload: ProtocolMessage | str | bytes | dict[str, Any],
|
||
) -> ProtocolMessage:
|
||
"""解析协议消息。
|
||
|
||
从原始载荷（字符串、字节或字典）解析为对应的 ProtocolMessage 类型。
|
||
根据 "type" 字段自动识别消息类型并验证。
|
||
|
||
Args:
|
||
payload: 原始消息载荷，支持已解析模型、JSON 字符串、字节或字典
|
||
|
||
Returns:
|
||
解析后的协议消息对象
|
||
|
||
Raises:
|
||
ValueError: 未知的消息类型
|
||
|
||
Example:
|
||
>>> msg = parse_message('{"type": "invoke", "id": "1", "capability": "test"}')
|
||
>>> isinstance(msg, InvokeMessage)
|
||
True
|
||
"""
|
||
if isinstance(
|
||
payload,
|
||
(
|
||
InitializeMessage,
|
||
ResultMessage,
|
||
InvokeMessage,
|
||
EventMessage,
|
||
CancelMessage,
|
||
),
|
||
):
|
||
return payload
|
||
if isinstance(payload, bytes):
|
||
payload = payload.decode("utf-8")
|
||
if isinstance(payload, str):
|
||
payload = json.loads(payload)
|
||
if not isinstance(payload, dict):
|
||
raise ValueError("协议消息必须是 JSON object")
|
||
message_type = payload.get("type")
|
||
model = _PROTOCOL_MESSAGE_MODELS.get(str(message_type))
|
||
if model is not None:
|
||
return model.model_validate(payload)
|
||
raise ValueError(f"未知消息类型：{message_type}")
|
||
|
||
|
||
__all__ = [
|
||
"CancelMessage",
|
||
"ErrorPayload",
|
||
"EventMessage",
|
||
"InitializeMessage",
|
||
"InitializeOutput",
|
||
"InvokeMessage",
|
||
"PeerInfo",
|
||
"ProtocolMessage",
|
||
"ResultMessage",
|
||
"parse_message",
|
||
]
|