/// <reference types="node" />
import { APIGatewayEvent, ProxyResult } from 'aws-lambda';
import { RouterConfig } from './route/router-config';
export declare class ResponseUtil {
    private constructor();
    static errorResponse(errorMessages: string[], statusCode: number, reqId: string): ProxyResult;
    static redirect(target: string, code?: number, queryParams?: any): ProxyResult;
    static buildHttpError(errorMessage: string, statusCode: number): Error;
    static errorToProxyResult(error: Error, reqId: string, defaultErrorMessage?: string): ProxyResult;
    static coerceToProxyResult(input: any): ProxyResult;
    static addCORSToProxyResult(input: ProxyResult, cfg: RouterConfig, srcEvent: APIGatewayEvent): ProxyResult;
    static buildReflectCorsAllowOrigin(srcEvent: APIGatewayEvent, defaultValue?: string): string;
    static buildReflectCorsAllowHeaders(srcEvent: APIGatewayEvent, defaultValue?: string): string;
    static buildReflectCorsAllowMethods(srcEvent: APIGatewayEvent, defaultValue?: string): string;
    static applyGzipIfPossible(encodingHeader: string, proxyResult: ProxyResult): Promise<ProxyResult>;
    static gzip(input: Buffer): Promise<Buffer>;
}