import { Middleware } from '../Middleware';
import { Request } from '../Request';
import { Response } from '../Response';
/**
 * Trim strings middleware.
 * Automatically trims whitespace from all string inputs in the request body.
 */
export declare class TrimStrings implements Middleware {
    /**
     * The names of the attributes that should not be trimmed.
     */
    protected except: string[];
    /**
     * Handle an incoming request.
     */
    handle(request: Request, next: (request: Request) => Promise<Response> | Response): Promise<Response>;
    /**
     * Clean the given data.
     */
    protected clean(data: any): void;
}
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