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TokenCredentialPolicy.ts
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TokenCredentialPolicy.ts
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.
import { HttpHeaders, RequestPolicy, RequestPolicyOptions, WebResource } from "@azure/ms-rest-js";
import { TokenCredential } from "../credentials/TokenCredential";
import { HeaderConstants } from "../utils/constants";
import { CredentialPolicy } from "./CredentialPolicy";
/**
* TokenCredentialPolicy is a policy used to sign HTTP request with a token.
* Such as an OAuth bearer token.
*
* @export
* @class TokenCredentialPolicy
* @extends {CredentialPolicy}
*/
export class TokenCredentialPolicy extends CredentialPolicy {
/**
* The value of token.
*
* @type {TokenCredential}
* @memberof TokenCredentialPolicy
*/
public readonly tokenCredential: TokenCredential;
/**
* Token authorization scheme, default header is "Bearer".
*
* @type {string}
* @memberof TokenCredentialPolicy
*/
public readonly authorizationScheme: string;
/**
* Creates an instance of TokenCredentialPolicy.
* @param {RequestPolicy} nextPolicy
* @param {RequestPolicyOptions} options
* @param {TokenCredential} tokenCredential
* @memberof TokenCredentialPolicy
*/
constructor(
nextPolicy: RequestPolicy,
options: RequestPolicyOptions,
tokenCredential: TokenCredential
) {
super(nextPolicy, options);
this.tokenCredential = tokenCredential;
this.authorizationScheme = HeaderConstants.AUTHORIZATION_SCHEME;
}
/**
* Sign request with token.
*
* @protected
* @param {WebResource} request
* @returns {WebResource}
* @memberof TokenCredentialPolicy
*/
protected signRequest(request: WebResource): WebResource {
if (!request.headers) {
request.headers = new HttpHeaders();
}
request.headers.set(
HeaderConstants.AUTHORIZATION,
`${this.authorizationScheme} ${this.tokenCredential.token}`
);
return request;
}
}