wehub-resource-sync
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49 lines
1.7 KiB
Python
49 lines
1.7 KiB
Python
"""Exported era classifier (lowlevel API): the same dual-era app + CORS — the predicate stays in `server.py`."""
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from typing import Any
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import mcp_types as types
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from mcp_types.version import MODERN_PROTOCOL_VERSIONS
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from starlette.applications import Starlette
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from starlette.middleware.cors import CORSMiddleware
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from mcp.server.context import ServerRequestContext
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from mcp.server.lowlevel import Server
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from stories._hosting import NO_DNS_REBIND, run_app_from_args
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from .server import MCP_ALLOWED_HEADERS, MCP_ALLOWED_METHODS, MCP_EXPOSED_HEADERS
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WHICH_ARM = types.Tool(
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name="which_arm",
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description="Report which era the built-in router dispatched this request to.",
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input_schema={"type": "object", "properties": {}},
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)
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def build_app() -> Starlette:
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async def list_tools(
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ctx: ServerRequestContext[Any], params: types.PaginatedRequestParams | None
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) -> types.ListToolsResult:
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return types.ListToolsResult(tools=[WHICH_ARM])
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async def call_tool(ctx: ServerRequestContext[Any], params: types.CallToolRequestParams) -> types.CallToolResult:
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assert params.name == "which_arm"
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arm = "modern" if ctx.protocol_version in MODERN_PROTOCOL_VERSIONS else "legacy"
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return types.CallToolResult(content=[types.TextContent(text=arm)])
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server = Server("legacy-routing-example", on_list_tools=list_tools, on_call_tool=call_tool)
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app = server.streamable_http_app(transport_security=NO_DNS_REBIND)
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app.add_middleware(
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CORSMiddleware,
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allow_origins=["*"],
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allow_methods=MCP_ALLOWED_METHODS,
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allow_headers=MCP_ALLOWED_HEADERS,
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expose_headers=MCP_EXPOSED_HEADERS,
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)
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return app
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if __name__ == "__main__":
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run_app_from_args(build_app)
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