/**
 * postgres-mcp - Legacy SSE Transport Handlers
 *
 * Handles legacy SSE (MCP protocol 2024-11-05) connections via `/sse` + `/messages`.
 * Backward compatibility — intentionally using deprecated SSEServerTransport.
 */
import type { IncomingMessage, ServerResponse } from "node:http";
import type { StreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/streamableHttp.js";
import { SSEServerTransport } from "@modelcontextprotocol/sdk/server/sse.js";
import type { Transport } from "@modelcontextprotocol/sdk/shared/transport.js";
/**
 * Handle legacy SSE connection request (GET /sse).
 *
 * Creates an SSEServerTransport that establishes an event stream and
 * directs the client to POST messages to `/messages?sessionId=<id>`.
 */
export declare function handleLegacySSERequest(_req: IncomingMessage, res: ServerResponse, transports: Map<string, StreamableHTTPServerTransport | SSEServerTransport>, onConnect?: (transport: Transport) => void | Promise<void>): Promise<void>;
/**
 * Handle legacy message request (POST /messages?sessionId=<id>).
 *
 * Routes the message to the correct SSEServerTransport instance.
 */
export declare function handleLegacyMessageRequest(req: IncomingMessage, res: ServerResponse, url: URL, transports: Map<string, StreamableHTTPServerTransport | SSEServerTransport>): Promise<void>;
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