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/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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/**
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* Polyfill for [Headers](https://developer.mozilla.org/en-US/docs/Web/API/Headers/Headers), as
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* specified in the [Fetch Spec](https://fetch.spec.whatwg.org/#headers-class).
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*
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* The only known difference between this `Headers` implementation and the spec is the
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* lack of an `entries` method.
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*
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* ### Example
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*
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* ```
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* import {Headers} from '@angular/http';
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*
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* var firstHeaders = new Headers();
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* firstHeaders.append('Content-Type', 'image/jpeg');
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* console.log(firstHeaders.get('Content-Type')) //'image/jpeg'
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*
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* // Create headers from Plain Old JavaScript Object
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* var secondHeaders = new Headers({
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* 'X-My-Custom-Header': 'Angular'
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* });
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* console.log(secondHeaders.get('X-My-Custom-Header')); //'Angular'
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*
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* var thirdHeaders = new Headers(secondHeaders);
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* console.log(thirdHeaders.get('X-My-Custom-Header')); //'Angular'
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* ```
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*
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* @experimental
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*/
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export declare class Headers {
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constructor(headers?: Headers | {
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[name: string]: any;
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} | null);
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/**
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* Returns a new Headers instance from the given DOMString of Response Headers
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*/
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static fromResponseHeaderString(headersString: string): Headers;
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/**
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* Appends a header to existing list of header values for a given header name.
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*/
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append(name: string, value: string): void;
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/**
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* Deletes all header values for the given name.
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*/
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delete(name: string): void;
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forEach(fn: (values: string[], name: string | undefined, headers: Map<string, string[]>) => void): void;
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/**
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* Returns first header that matches given name.
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*/
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get(name: string): string | null;
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/**
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* Checks for existence of header by given name.
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*/
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has(name: string): boolean;
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/**
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* Returns the names of the headers
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*/
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keys(): string[];
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/**
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* Sets or overrides header value for given name.
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*/
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set(name: string, value: string | string[]): void;
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/**
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* Returns values of all headers.
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*/
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values(): string[][];
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/**
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* Returns string of all headers.
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*/
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toJSON(): {
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[name: string]: any;
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};
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/**
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* Returns list of header values for a given name.
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*/
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getAll(name: string): string[] | null;
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/**
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* This method is not implemented.
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*/
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entries(): void;
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private mayBeSetNormalizedName(name);
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}
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