import type { PickProperty } from '@ngify/core';
import { HttpContext } from './context';
import { HttpHeaders } from './headers';
import { HttpParams } from './params';
export type HttpMethod = 'DELETE' | 'GET' | 'HEAD' | 'POST' | 'OPTIONS' | 'PUT' | 'PATCH';
export type HttpResponseType = 'arraybuffer' | 'blob' | 'json' | 'text';
export declare class HttpRequest<T> {
    readonly method: HttpMethod;
    readonly url: string;
    readonly body: T | null;
    readonly params: HttpParams;
    readonly headers: HttpHeaders;
    readonly context: HttpContext;
    readonly responseType: HttpResponseType;
    readonly urlWithParams: string;
    readonly reportProgress: boolean;
    readonly withCredentials: boolean;
    constructor(method: HttpMethod, url: string, options?: {
        body?: T;
        params?: HttpParams | ConstructorParameters<typeof HttpParams>[0] | null;
        headers?: HttpHeaders | ConstructorParameters<typeof HttpHeaders>[0];
        context?: HttpContext;
        responseType?: HttpRequest<unknown>['responseType'];
        reportProgress?: boolean;
        withCredentials?: boolean;
    });
    /**
     * Examine the body and attempt to infer an appropriate MIME type for it.
     * If no such type can be inferred, this method will return `null`.
     */
    detectContentTypeHeader(): string | null;
    /**
     * Transform the free-form body into a serialized format suitable for transmission to the server.
     */
    serializeBody(): ArrayBuffer | Blob | FormData | URLSearchParams | string | null;
    clone<D = T>(update?: Partial<PickProperty<HttpRequest<unknown>>>): HttpRequest<D>;
}