export declare function contentSecurityPolicy(scriptSrcDirectives?: string[], scriptSrcAttrDirectives?: string[], styleSrcDirectives?: string[], imgSrcDirectives?: string[], defaultSrcDirectives?: string[], baseUriDirectives?: string[], connectSrcDirectives?: string[], fontSrcDirectives?: string[], frameSrcDirectives?: string[], manifestSrcDirectives?: string[]): (req: import("node:http").IncomingMessage, res: import("node:http").ServerResponse, next: (err?: Error) => void) => void;