bvandeusenandClaude Opus 5.5
1d9ac2b46a
#5015 "Built-in host-agent playbooks make an MCP caller supply steward_url" - run_playbook, create_schedule and set_alert_action fill a steward-builtin playbook's steward_url when the caller leaves it out or empty, from Settings → General → Public base URL, else the scheme and host the MCP request arrived on — the same source the web actions use. - run_playbook's reply names what it filled (filled_by_steward), and get_playbook shows that value as the variable's default. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
51 lines
1.9 KiB
Python
51 lines
1.9 KiB
Python
"""Per-request MCP context: who is calling, and which app they are calling.
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The /mcp transport bypasses Quart's request pipeline, so neither `session`
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nor `current_app` exists inside a tool. The ASGI auth wrapper in server.py
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sets these from the resolved bearer token before dispatching; tools read them
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through `current_caller()` and `mcp_app()`.
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Neither falls back to a default: a tool reached without an authenticated
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caller is a bug in the transport, and it raises rather than acting for nobody.
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"""
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from __future__ import annotations
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from contextvars import ContextVar
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from typing import TYPE_CHECKING
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if TYPE_CHECKING:
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from quart import Quart
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from steward.core.api_tokens import Caller
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_caller_ctx: ContextVar["Caller | None"] = ContextVar("steward_mcp_caller", default=None)
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_app_ctx: ContextVar["Quart | None"] = ContextVar("steward_mcp_app", default=None)
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# The scheme and host the caller reached /mcp on, e.g. "https://steward.example".
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_base_url_ctx: ContextVar[str] = ContextVar("steward_mcp_base_url", default="")
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def current_caller() -> "Caller":
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caller = _caller_ctx.get()
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if caller is None:
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raise RuntimeError("no MCP caller in context: the request was not bearer-authenticated")
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return caller
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def current_caller_or_none() -> "Caller | None":
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return _caller_ctx.get()
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def mcp_app() -> "Quart":
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app = _app_ctx.get()
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if app is None:
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raise RuntimeError("no Steward app in MCP context")
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return app
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def public_url() -> str:
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"""Steward's externally reachable base URL, as the web side's
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public_base_url() gives it: Settings → General → Public base URL when set,
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else the scheme and host this MCP request arrived on; "" when neither is
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known."""
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app = _app_ctx.get()
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configured = (app.config.get("PUBLIC_BASE_URL") or "").strip() if app is not None else ""
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return (configured or _base_url_ctx.get()).rstrip("/")
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