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TypeScript
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778import * as Effect from "effect/Effect";import type { McpRuntime } from "./mcp-runtime";import { privateResponse } from "./session";import { PERSONAL_PATH } from "./runtime-path";
export const MCP_CALLBACK_PATH = `${PERSONAL_PATH}/mcp-callback`;const authorizePath = /^\/api\/mcp\/(mcp-[0-9a-f-]{36})\/authorize$/;
export function isMcpAuthPath(path: string) { return path === MCP_CALLBACK_PATH || authorizePath.test(path);}
// Called only after the normal ingress origin/session check. Callback handling// goes through the same per-server Effect serialization as configuration writes.export function handleMcpAuth(request: Request, runtime: McpRuntime) { return Effect.gen(function* () { const url = new URL(request.url); const redirect = (success: boolean) => new Response(null, { status: 303, headers: { Location: `/extensions?mcpAuth=${success ? "connected" : "failed"}`, "Cache-Control": "no-store", "Referrer-Policy": "no-referrer", }, }); if (url.pathname === MCP_CALLBACK_PATH) { if (request.method !== "GET") return privateResponse("Method not allowed", 405); if ( ["state", "code", "error"].some( (key) => url.searchParams.getAll(key).length > 1, ) ) return redirect(false); const success = yield* runtime.callback(request); return redirect(success); } const match = authorizePath.exec(url.pathname); if (!match) return privateResponse("Not found", 404); if (request.method !== "POST") return privateResponse("Method not allowed", 405); const form = yield* Effect.promise(() => request.formData()); const target = yield* runtime.authorize( match[1], Number(form.get("revision")), new URL(MCP_CALLBACK_PATH, url.origin).href, ); if (!target) return redirect(false); if (target.state === "ready") return redirect(true); const auth = new URL(target.url); if ( auth.protocol !== "https:" || auth.username || auth.password || auth.href.length > 16384 ) return redirect(false); return new Response(null, { status: 303, headers: { Location: auth.href, "Cache-Control": "no-store", "Referrer-Policy": "no-referrer", }, }); }).pipe( Effect.catchCause(() => Effect.succeed( privateResponse( "MCP authorization unavailable. Return to Extensions and reconnect.", 400, ), ), ), );}