import type { NestMiddleware } from '@nestjs/common';
import type { Request, Response, NextFunction } from 'express';
import type { MastraModuleOptions } from '../mastra.module.js';
/**
 * Middleware that enforces body size limits via Content-Length header.
 *
 * This middleware runs BEFORE body parsers and provides early rejection
 * of oversized payloads based on the Content-Length header.
 *
 * Note: JSON body size limits are also enforced by JsonBodyMiddleware's
 * express.json({ limit: ... }) configuration, which handles both
 * Content-Length validation and streaming body parsing.
 *
 * For multipart requests, size limits are enforced by Busboy in the
 * route handler service.
 */
export declare class BodyLimitMiddleware implements NestMiddleware {
    private readonly options;
    private readonly logger;
    private readonly maxSize;
    constructor(options: MastraModuleOptions);
    use(req: Request, res: Response, next: NextFunction): void;
}
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