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✨ 支持 MCP Streamable HTTP 传输协议 #28
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3 changed files with 50 additions and 7 deletions
11
README.md
11
README.md
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@ -168,8 +168,9 @@ LLMCHAT__MCP_SERVERS同样为一个dict,key为服务器名称,value配置的
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| command | stdio服务器必填 | 无 | stdio服务器MCP命令 |
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| command | stdio服务器必填 | 无 | stdio服务器MCP命令 |
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| args | 否 | [] | stdio服务器MCP命令参数 |
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| args | 否 | [] | stdio服务器MCP命令参数 |
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| env | 否 | {} | stdio服务器环境变量 |
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| env | 否 | {} | stdio服务器环境变量 |
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| url | sse服务器必填 | 无 | sse服务器地址 |
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| url | 远程服务器必填 | 无 | 远程MCP服务器地址 |
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| headers | 否 | {} | sse模式下http请求头,用于认证或其他设置 |
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| headers | 否 | {} | 远程服务器http请求头,用于认证或其他设置 |
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| transport | 否 | 自动 | 远程MCP传输协议类型,可选 `sse` 或 `streamable_http` ,不填则自动探测 |
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以下为在 Claude.app 的MCP服务器配置基础上增加的字段
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以下为在 Claude.app 的MCP服务器配置基础上增加的字段
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| 配置项 | 必填 | 默认值 | 说明 |
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| 配置项 | 必填 | 默认值 | 说明 |
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@ -255,6 +256,12 @@ LLMCHAT__MCP_SERVERS同样为一个dict,key为服务器名称,value配置的
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"formulahendry/mcp-server-code-runner"
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"formulahendry/mcp-server-code-runner"
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]
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]
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},
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},
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"tavily": {
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"friendly_name": "Tavily搜索",
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"additional_prompt": "当你需要搜索最新的互联网信息时,请使用 tavily 工具。",
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"url": "https://mcp.tavily.com/mcp/?tavilyApiKey=<your-api-key>",
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"transport": "streamable_http"
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}
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}
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}
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'
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'
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@ -24,8 +24,9 @@ class MCPServerConfig(BaseModel):
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command: str | None = Field(None, description="stdio模式下MCP命令")
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command: str | None = Field(None, description="stdio模式下MCP命令")
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args: list[str] | None = Field([], description="stdio模式下MCP命令参数")
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args: list[str] | None = Field([], description="stdio模式下MCP命令参数")
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env: dict[str, str] | None = Field({}, description="stdio模式下MCP命令环境变量")
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env: dict[str, str] | None = Field({}, description="stdio模式下MCP命令环境变量")
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url: str | None = Field(None, description="sse模式下MCP服务器地址")
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url: str | None = Field(None, description="远程MCP服务器地址")
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headers: dict[str, str] | None = Field({}, description="sse模式下http请求头,用于认证或其他设置")
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headers: dict[str, str] | None = Field({}, description="远程MCP服务器http请求头,用于认证或其他设置")
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transport: str | None = Field(None, description="远程MCP传输协议类型,可选 'sse' 或 'streamable_http',默认自动检测")
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# 额外字段
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# 额外字段
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friendly_name: str | None = Field(None, description="MCP服务器友好名称")
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friendly_name: str | None = Field(None, description="MCP服务器友好名称")
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@ -3,8 +3,10 @@ from contextlib import AsyncExitStack
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from time import monotonic
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from time import monotonic
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from typing import Any, cast
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from typing import Any, cast
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import httpx
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from mcp import ClientSession, StdioServerParameters
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from mcp import ClientSession, StdioServerParameters
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from mcp.client.sse import sse_client
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from mcp.client.sse import sse_client
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from mcp.client.streamable_http import streamable_http_client
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from mcp.client.stdio import stdio_client
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from mcp.client.stdio import stdio_client
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from nonebot import logger
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from nonebot import logger
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@ -88,9 +90,42 @@ class MCPClient:
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config = self.server_config[server_name]
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config = self.server_config[server_name]
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session_stack = AsyncExitStack()
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session_stack = AsyncExitStack()
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if config.url:
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if config.url:
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transport = await session_stack.enter_async_context(
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transport_type = config.transport
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sse_client(url=config.url, headers=config.headers)
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if transport_type == "streamable_http":
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)
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logger.debug(f"服务器[{server_name}]使用 streamable_http 传输协议")
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http_client = await session_stack.enter_async_context(
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httpx.AsyncClient(headers=config.headers or {})
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)
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read, write, _ = await session_stack.enter_async_context(
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streamable_http_client(url=config.url, http_client=http_client)
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)
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transport = (read, write)
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elif transport_type == "sse":
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logger.debug(f"服务器[{server_name}]使用 sse 传输协议")
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transport = await session_stack.enter_async_context(
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sse_client(url=config.url, headers=config.headers)
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)
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else:
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# 未指定协议,自动探测:先尝试 streamable_http,失败则回退到 sse
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logger.debug(f"服务器[{server_name}]未指定传输协议,开始自动探测")
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probe_stack = AsyncExitStack()
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try:
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http_client = await probe_stack.enter_async_context(
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httpx.AsyncClient(headers=config.headers or {})
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)
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read, write, _ = await probe_stack.enter_async_context(
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streamable_http_client(url=config.url, http_client=http_client)
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)
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await session_stack.enter_async_context(probe_stack)
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transport = (read, write)
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logger.debug(f"服务器[{server_name}]自动探测成功: 使用 streamable_http 传输协议")
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except Exception as e:
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await probe_stack.aclose()
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logger.debug(f"服务器[{server_name}]streamable_http 探测失败({e}),回退到 sse")
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transport = await session_stack.enter_async_context(
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sse_client(url=config.url, headers=config.headers)
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)
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logger.debug(f"服务器[{server_name}]自动探测成功: 使用 sse 传输协议")
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elif config.command:
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elif config.command:
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stdio_params: dict[str, Any] = {
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stdio_params: dict[str, Any] = {
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"command": config.command,
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"command": config.command,
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