import { RequestOptionsArgs, ConnectionBackend } from './interfaces';
import { Request } from './static_request';
import { Response } from './static_response';
import { RequestOptions } from './base_request_options';
import { Observable } from 'rxjs/Observable';
/**
 * Performs http requests using `XMLHttpRequest` as the default backend.
 *
 * `Http` is available as an injectable class, with methods to perform http requests. Calling
 * `request` returns an `Observable` which will emit a single {@link Response} when a
 * response is received.
 *
 * ### Example
 *
 * ```typescript
 * import {Http, HTTP_PROVIDERS} from 'angular2/http';
 * @Component({
 *   selector: 'http-app',
 *   viewProviders: [HTTP_PROVIDERS],
 *   templateUrl: 'people.html'
 * })
 * class PeopleComponent {
 *   constructor(http: Http) {
 *     http.get('people.json')
 *       // Call map on the response observable to get the parsed people object
 *       .map(res => res.json())
 *       // Subscribe to the observable to get the parsed people object and attach it to the
 *       // component
 *       .subscribe(people => this.people = people);
 *   }
 * }
 * ```
 *
 *
 * ### Example
 *
 * ```
 * http.get('people.json').observer({next: (value) => this.people = value});
 * ```
 *
 * The default construct used to perform requests, `XMLHttpRequest`, is abstracted as a "Backend" (
 * {@link XHRBackend} in this case), which could be mocked with dependency injection by replacing
 * the {@link XHRBackend} provider, as in the following example:
 *
 * ### Example
 *
 * ```typescript
 * import {BaseRequestOptions, Http} from 'angular2/http';
 * import {MockBackend} from 'angular2/http/testing';
 * var injector = Injector.resolveAndCreate([
 *   BaseRequestOptions,
 *   MockBackend,
 *   provide(Http, {useFactory:
 *       function(backend, defaultOptions) {
 *         return new Http(backend, defaultOptions);
 *       },
 *       deps: [MockBackend, BaseRequestOptions]})
 * ]);
 * var http = injector.get(Http);
 * http.get('request-from-mock-backend.json').subscribe((res:Response) => doSomething(res));
 * ```
 *
 **/
export declare class Http {
    protected _backend: ConnectionBackend;
    protected _defaultOptions: RequestOptions;
    constructor(_backend: ConnectionBackend, _defaultOptions: RequestOptions);
    /**
     * Performs any type of http request. First argument is required, and can either be a url or
     * a {@link Request} instance. If the first argument is a url, an optional {@link RequestOptions}
     * object can be provided as the 2nd argument. The options object will be merged with the values
     * of {@link BaseRequestOptions} before performing the request.
     */
    request(url: string | Request, options?: RequestOptionsArgs): Observable<Response>;
    /**
     * Performs a request with `get` http method.
     */
    get(url: string, options?: RequestOptionsArgs): Observable<Response>;
    /**
     * Performs a request with `post` http method.
     */
    post(url: string, body: string, options?: RequestOptionsArgs): Observable<Response>;
    /**
     * Performs a request with `put` http method.
     */
    put(url: string, body: string, options?: RequestOptionsArgs): Observable<Response>;
    /**
     * Performs a request with `delete` http method.
     */
    delete(url: string, options?: RequestOptionsArgs): Observable<Response>;
    /**
     * Performs a request with `patch` http method.
     */
    patch(url: string, body: string, options?: RequestOptionsArgs): Observable<Response>;
    /**
     * Performs a request with `head` http method.
     */
    head(url: string, options?: RequestOptionsArgs): Observable<Response>;
}
export declare class Jsonp extends Http {
    constructor(backend: ConnectionBackend, defaultOptions: RequestOptions);
    /**
     * Performs any type of http request. First argument is required, and can either be a url or
     * a {@link Request} instance. If the first argument is a url, an optional {@link RequestOptions}
     * object can be provided as the 2nd argument. The options object will be merged with the values
     * of {@link BaseRequestOptions} before performing the request.
     */
    request(url: string | Request, options?: RequestOptionsArgs): Observable<Response>;
}