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UserSession.ts
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/* Copyright (c) 2017 Environmental Systems Research Institute, Inc.
* Apache-2.0 */
import * as http from "http";
import {
request,
ArcGISAuthError,
IAuthenticationManager
} from "@esri/arcgis-rest-request";
import { generateToken } from "./generate-token";
import { fetchToken, IFetchTokenResponse } from "./fetch-token";
import { IUser } from "@esri/arcgis-rest-common-types";
/**
* Internal utility for resolving a Promise from outside its constructor.
*
* See: http://lea.verou.me/2016/12/resolve-promises-externally-with-this-one-weird-trick/
*/
interface IDeferred<T> {
promise: Promise<T>;
resolve: (v: T) => void;
reject: (v: any) => void;
}
export type AuthenticationProvider = "arcgis" | "facebook" | "google";
/**
* Represents a [credential]((https://developers.arcgis.com/javascript/latest/api-reference/esri-identity-Credential.html)) object used to access a secure ArcGIS resource.
*/
export interface ICredential {
expires: number;
server: string;
ssl: boolean;
token: string;
userId: string;
}
function defer<T>(): IDeferred<T> {
const deferred: any = {
promise: null,
resolve: null,
reject: null
};
deferred.promise = new Promise((resolve, reject) => {
deferred.resolve = resolve;
deferred.reject = reject;
});
return deferred as IDeferred<T>;
}
/**
* Options for static OAuth 2.0 helper methods on `UserSession`.
*/
export interface IOauth2Options {
/**
* Client ID of your application. Can be obtained by registering an application
* on [ArcGIS for Developers](https://developers.arcgis.com/documentation/core-concepts/security-and-authentication/signing-in-arcgis-online-users/#registering-your-application),
* [ArcGIS Online](http://doc.arcgis.com/en/arcgis-online/share-maps/add-items.htm#ESRI_SECTION1_0D1B620254F745AE84F394289F8AF44B) or on your instance of ArcGIS Enterprise.
*/
clientId: string;
/**
* A valid URL to redirect to after a user authorizes your application. Can be set on [ArcGIS for Developers](https://developers.arcgis.com/documentation/core-concepts/security-and-authentication/signing-in-arcgis-online-users/#registering-your-application),
* [ArcGIS Online](http://doc.arcgis.com/en/arcgis-online/share-maps/add-items.htm#ESRI_SECTION1_0D1B620254F745AE84F394289F8AF44B) or on your instance of ArcGIS Enterprise.
*/
redirectUri: string;
/**
* The ArcGIS Online or ArcGIS Enterprise portal you want to use for authentication. Defaults to `https://www.arcgis.com/sharing/rest` for the ArcGIS Online portal.
*/
portal?: string;
/**
* ArcGIS Authentication is used by default. Specifying an alternative will take users directly to the corresponding provider's OAuth page.
*/
provider?: AuthenticationProvider;
/**
* Duration (in minutes) that a token will be valid. Defaults to 20160 (two weeks).
*/
duration?: number;
/**
* Determines whether to open the authorization window in a new tab/window or in the current window.
*
* @browserOnly
*/
popup?: boolean;
/**
* Duration (in minutes) that a refresh token will be valid.
*
* @nodeOnly
*/
refreshTokenTTL?: number;
/**
* The locale assumed to render the login page.
*
* @browserOnly
*/
locale?: string;
/**
* Applications can specify an opaque value for this parameter to correlate the authorization request sent with the received response. By default, clientId is used.
*
* @browserOnly
*/
state?: string;
}
/**
* Options for the `UserSession` constructor.
*/
export interface IUserSessionOptions {
/**
* Client ID of your application. Can be obtained by registering an application
* on [ArcGIS for Developers](https://developers.arcgis.com/documentation/core-concepts/security-and-authentication/signing-in-arcgis-online-users/#registering-your-application),
* [ArcGIS Online](http://doc.arcgis.com/en/arcgis-online/share-maps/add-items.htm#ESRI_SECTION1_0D1B620254F745AE84F394289F8AF44B) or on your instance of ArcGIS Enterprise.
*/
clientId?: string;
/**
* A valid URL to redirect to after a user authorizes your application. Can be set on [ArcGIS for Developers](https://developers.arcgis.com/documentation/core-concepts/security-and-authentication/signing-in-arcgis-online-users/#registering-your-application),
* [ArcGIS Online](http://doc.arcgis.com/en/arcgis-online/share-maps/add-items.htm#ESRI_SECTION1_0D1B620254F745AE84F394289F8AF44B) or on your instance of ArcGIS Enterprise.
*/
redirectUri?: string;
/**
* OAuth 2.0 refresh token from a previous user session.
*/
refreshToken?: string;
/**
* Expiration date of the `refreshToken`
*/
refreshTokenExpires?: Date;
/**
* The authenticated user's username. Guaranteed to be unique across ArcGIS Online or your instance of ArcGIS Enterprise.
*/
username?: string;
/**
* Password for this user. Used in CLI apps where users cannot do OAuth 2.0.
*/
password?: string;
/**
* OAuth 2.0 access token from a previous user session.
*/
token?: string;
/**
* Expiration date for the `token`
*/
tokenExpires?: Date;
/**
* The ArcGIS Online or ArcGIS Enterprise portal you want to use for authentication. Defaults to `https://www.arcgis.com/sharing/rest` for the ArcGIS Online portal.
*/
portal?: string;
/**
* ArcGIS Authentication is used by default. Specifying an alternative will take users directly to the corresponding provider's OAuth page.
*/
provider?: AuthenticationProvider;
/**
* Duration of requested token validity in minutes. Used when requesting tokens with `username` and `password` or when validating the identity of unknown servers. Defaults to two weeks.
*/
tokenDuration?: number;
/**
* Duration (in minutes) that a refresh token will be valid.
*/
refreshTokenTTL?: number;
}
/**
* ```js
* const session = new UserSession({
* username: "jsmith",
* password: "123456"
* })
* ```
* Used to manage the authentication of ArcGIS Online and ArcGIS Enterprise users
* in `request`. This class also includes several
* helper methods for authenticating users with [OAuth 2.0](https://developers.arcgis.com/documentation/core-concepts/security-and-authentication/browser-based-user-logins/) in both browser and
* server applications.
*
*/
export class UserSession implements IAuthenticationManager {
/**
* Client ID being used for authentication if provided in the `constructor`.
*/
readonly clientId: string;
/**
* The currently authenticated user if provided in the `constructor`.
*/
readonly username: string;
/**
* The currently authenticated user's password if provided in the `constructor`.
*/
readonly password: string;
/**
* The current portal the user is authenticated with.
*/
readonly portal: string;
/**
* The authentication provider to use.
*/
readonly provider: AuthenticationProvider;
/**
* Determines how long new tokens requested are valid.
*/
readonly tokenDuration: number;
/**
* A valid redirect URI for this application if provided in the `constructor`.
*/
readonly redirectUri: string;
/**
* Duration of new OAuth 2.0 refresh token validity.
*/
readonly refreshTokenTTL: number;
/**
* Hydrated by a call to [getUser()](#getUser-summary).
*/
_user: IUser;
private _token: string;
private _tokenExpires: Date;
private _refreshToken: string;
private _refreshTokenExpires: Date;
/**
* Internal object to keep track of pending token requests. Used to prevent
* duplicate token requests.
*/
private _pendingTokenRequests: {
[key: string]: Promise<string>;
};
/**
* Internal list of trusted 3rd party servers (federated servers) that have
* been validated with `generateToken`.
*/
private trustedServers: {
[key: string]: {
token: string;
expires: Date;
};
};
/**
* The current ArcGIS Online or ArcGIS Enterprise `token`.
*/
get token() {
return this._token;
}
/**
* The expiration time of the current `token`.
*/
get tokenExpires() {
return this._tokenExpires;
}
/**
* The current token to ArcGIS Online or ArcGIS Enterprise.
*/
get refreshToken() {
return this._refreshToken;
}
/**
* The expiration time of the current `refreshToken`.
*/
get refreshTokenExpires() {
return this._refreshTokenExpires;
}
constructor(options: IUserSessionOptions) {
this.clientId = options.clientId;
this._refreshToken = options.refreshToken;
this._refreshTokenExpires = options.refreshTokenExpires;
this.username = options.username;
this.password = options.password;
this._token = options.token;
this._tokenExpires = options.tokenExpires;
this.portal = options.portal || "https://www.arcgis.com/sharing/rest";
this.provider = options.provider || "arcgis";
this.tokenDuration = options.tokenDuration || 20160;
this.redirectUri = options.redirectUri;
this.refreshTokenTTL = options.refreshTokenTTL || 1440;
this.trustedServers = {};
this._pendingTokenRequests = {};
}
/**
* Begins a new browser-based OAuth 2.0 sign in. If `options.popup` is true the
* authentication window will open in a new tab/window otherwise the user will
* be redirected to the authorization page in their current tab.
*
* @browserOnly
*/
/* istanbul ignore next */
static beginOAuth2(options: IOauth2Options, win: any = window) {
const {
portal,
provider,
clientId,
duration,
redirectUri,
popup,
state,
locale
}: IOauth2Options = {
...{
portal: "https://www.arcgis.com/sharing/rest",
provider: "arcgis",
duration: 20160,
popup: true,
state: options.clientId,
locale: ""
},
...options
};
let url: string;
if (provider === "arcgis") {
url = `${portal}/oauth2/authorize?client_id=${clientId}&response_type=token&expiration=${duration}&redirect_uri=${encodeURIComponent(
redirectUri
)}&state=${state}&locale=${locale}`;
} else {
url = `${portal}/oauth2/social/authorize?client_id=${clientId}&socialLoginProviderName=${provider}&autoAccountCreateForSocial=true&response_type=token&expiration=${duration}&redirect_uri=${encodeURIComponent(
redirectUri
)}&state=${state}&locale=${locale}`;
}
if (!popup) {
win.location.href = url;
return undefined;
}
const session = defer<UserSession>();
win[`__ESRI_REST_AUTH_HANDLER_${clientId}`] = function(
errorString: any,
oauthInfoString: string
) {
if (errorString) {
const error = JSON.parse(errorString);
session.reject(new ArcGISAuthError(error.errorMessage, error.error));
return;
}
if (oauthInfoString) {
const oauthInfo = JSON.parse(oauthInfoString);
session.resolve(
new UserSession({
clientId,
portal,
token: oauthInfo.token,
tokenExpires: new Date(oauthInfo.expires),
username: oauthInfo.username
})
);
}
};
win.open(
url,
"oauth-window",
"height=400,width=600,menubar=no,location=yes,resizable=yes,scrollbars=yes,status=yes"
);
return session.promise;
}
/**
* Completes a browser-based OAuth 2.0 sign if `options.popup` is true the user
* will be returned to the previous window. Otherwise a new `UserSession`
* will be returned.
*
* @browserOnly
*/
/* istanbul ignore next */
static completeOAuth2(options: IOauth2Options, win: any = window) {
const { portal, clientId }: IOauth2Options = {
...{ portal: "https://www.arcgis.com/sharing/rest" },
...options
};
function completeSignIn(error: any, oauthInfo?: IFetchTokenResponse) {
if (win.opener && win.opener.parent) {
win.opener.parent[`__ESRI_REST_AUTH_HANDLER_${clientId}`](
error ? JSON.stringify(error) : undefined,
JSON.stringify(oauthInfo)
);
win.close();
return undefined;
}
if (win !== win.parent) {
win.parent[`__ESRI_REST_AUTH_HANDLER_${clientId}`](
error ? JSON.stringify(error) : undefined,
JSON.stringify(oauthInfo)
);
win.close();
return undefined;
}
if (error) {
throw new ArcGISAuthError(error.errorMessage, error.error);
}
return new UserSession({
clientId,
portal,
token: oauthInfo.token,
tokenExpires: oauthInfo.expires,
username: oauthInfo.username
});
}
const match = win.location.href.match(
/access_token=(.+)&expires_in=(.+)&username=([^&]+)/
);
if (!match) {
const errorMatch = win.location.href.match(
/error=(.+)&error_description=(.+)/
);
const error = errorMatch[1];
const errorMessage = decodeURIComponent(errorMatch[2]);
return completeSignIn({ error, errorMessage });
}
const token = match[1];
const expires = new Date(
Date.now() + parseInt(match[2], 10) * 1000 - 60 * 1000
);
const username = decodeURIComponent(match[3]);
return completeSignIn(undefined, {
token,
expires,
username
});
}
/**
* Begins a new server-based OAuth 2.0 sign in. This will redirect the user to
* the ArcGIS Online or ArcGIS Enterprise authorization page.
*
* @nodeOnly
*/
static authorize(options: IOauth2Options, response: http.ServerResponse) {
const { portal, clientId, duration, redirectUri }: IOauth2Options = {
...{ portal: "https://arcgis.com/sharing/rest", duration: 20160 },
...options
};
response.writeHead(301, {
Location: `${portal}/oauth2/authorize?client_id=${clientId}&duration=${duration}&response_type=code&redirect_uri=${encodeURIComponent(
redirectUri
)}`
});
response.end();
}
/**
* Completes the server-based OAuth 2.0 sign in process by exchanging the `authorizationCode`
* for a `access_token`.
*
* @nodeOnly
*/
static exchangeAuthorizationCode(
options: IOauth2Options,
authorizationCode: string
): Promise<UserSession> {
const {
portal,
clientId,
duration,
redirectUri,
refreshTokenTTL
}: IOauth2Options = {
...{
portal: "https://www.arcgis.com/sharing/rest",
duration: 20160,
refreshTokenTTL: 1440
},
...options
};
return fetchToken(`${portal}/oauth2/token`, {
grant_type: "authorization_code",
client_id: clientId,
redirect_uri: redirectUri,
code: authorizationCode
}).then(response => {
return new UserSession({
clientId,
portal,
redirectUri,
refreshToken: response.refreshToken,
refreshTokenTTL,
refreshTokenExpires: new Date(
Date.now() + (refreshTokenTTL - 1) * 1000
),
token: response.token,
tokenExpires: response.expires,
username: response.username
});
});
}
static deserialize(str: string) {
const options = JSON.parse(str);
return new UserSession({
clientId: options.clientId,
refreshToken: options.refreshToken,
refreshTokenExpires: new Date(options.refreshTokenExpires),
username: options.username,
password: options.password,
token: options.token,
tokenExpires: new Date(options.tokenExpires),
portal: options.portal,
tokenDuration: options.tokenDuration,
redirectUri: options.redirectUri,
refreshTokenTTL: options.refreshTokenTTL
});
}
/**
* Translates authentication from the format used in the [ArcGIS API for JavaScript](https://developers.arcgis.com/javascript/).
*
* ```js
* UserSession.fromCredential({
* userId: "jsmith",
* token: "secret"
* });
* ```
*
* @returns UserSession
*/
static fromCredential(credential: ICredential) {
return new UserSession({
portal: credential.server + `/sharing/rest`,
token: credential.token,
username: credential.userId,
tokenExpires: new Date(credential.expires)
});
}
/**
* Returns authentication in a format useable in the [ArcGIS API for JavaScript](https://developers.arcgis.com/javascript/).
*
* ```js
* esriId.registerToken(session.toCredential());
* ```
*
* @returns ICredential
*/
toCredential(): ICredential {
return {
expires: this.tokenExpires.getTime(),
server: this.portal,
ssl: true,
token: this.token,
userId: this.username
};
}
/**
* Returns information about the currently logged in [user](https://developers.arcgis.com/rest/users-groups-and-items/user.htm). Subsequent calls will *not* result in additional web traffic.
*
* ```js
* session.getUser()
* .then(response => {
* console.log(response.role); // "org_admin"
* })
* ```
*
* @returns A Promise that will resolve with the data from the response.
*/
getUser(): Promise<IUser> {
if (this._user && this._user.username === this.username) {
return new Promise(resolve => resolve(this._user));
} else {
const url = `${this.portal}/community/users/${encodeURIComponent(
this.username
)}`;
return request(url, {
httpMethod: "GET",
authentication: this
}).then(response => {
this._user = response;
return response;
});
}
}
/**
* Gets an appropriate token for the given URL. If `portal` is ArcGIS Online and
* the request is to an ArcGIS Online domain `token` will be used. If the request
* is to the current `portal` the current `token` will also be used. However if
* the request is to an unknown server we will validate the server with a request
* to our current `portal`.
*/
getToken(url: string) {
if (
/^https?:\/\/\S+\.arcgis\.com\/sharing\/rest/.test(this.portal) &&
/^https?:\/\/\S+\.arcgis\.com.+/.test(url)
) {
return this.getFreshToken();
} else if (new RegExp(this.portal).test(url)) {
return this.getFreshToken();
} else {
return this.getTokenForServer(url);
}
}
toJSON(): IUserSessionOptions {
return {
clientId: this.clientId,
refreshToken: this.refreshToken,
refreshTokenExpires: this.refreshTokenExpires,
username: this.username,
password: this.password,
token: this.token,
tokenExpires: this.tokenExpires,
portal: this.portal,
tokenDuration: this.tokenDuration,
redirectUri: this.redirectUri,
refreshTokenTTL: this.refreshTokenTTL
};
}
serialize() {
return JSON.stringify(this);
}
/**
* Manually refreshes the current `token` and `tokenExpires`.
*/
refreshSession(): Promise<UserSession> {
if (this.username && this.password) {
return this.refreshWithUsernameAndPassword();
}
if (this.clientId && this.refreshToken) {
return this.refreshWithRefreshToken();
}
return Promise.reject(new ArcGISAuthError("Unable to refresh token."));
}
/**
* Validates that a given URL is properly federated with our current `portal`.
* Attempts to use the internal `trustedServers` cache first.
*/
private getTokenForServer(url: string) {
const [root] = url.split("/rest/services/");
const existingToken = this.trustedServers[root];
if (existingToken && existingToken.expires.getTime() > Date.now()) {
return Promise.resolve(existingToken.token);
}
if (this._pendingTokenRequests[root]) {
return this._pendingTokenRequests[root];
}
this._pendingTokenRequests[root] = request(`${root}/rest/info`)
.then((response: any) => {
return response.owningSystemUrl;
})
.then(owningSystemUrl => {
/**
* if this server is not owned by this portal or the stand-alone
* instance of ArcGIS Server doesn't advertise federation,
* bail out with an error since we know we wont
* be able to generate a token
*/
if (
!owningSystemUrl ||
!new RegExp(owningSystemUrl).test(this.portal)
) {
throw new ArcGISAuthError(
`${url} is not federated with ${this.portal}.`,
"NOT_FEDERATED"
);
}
return request(`${owningSystemUrl}/sharing/rest/info`);
})
.then((response: any) => {
return response.authInfo.tokenServicesUrl;
})
.then((tokenServicesUrl: string) => {
if (this.token) {
return generateToken(tokenServicesUrl, {
token: this.token,
serverUrl: url,
expiration: this.tokenDuration
});
// generate an entirely fresh token if necessary
} else {
return generateToken(tokenServicesUrl, {
username: this.username,
password: this.password,
expiration: this.tokenDuration
}).then((response: any) => {
this._token = response.token;
this._tokenExpires = new Date(response.expires);
return response;
});
}
})
.then(response => {
this.trustedServers[root] = {
expires: new Date(response.expires),
token: response.token
};
return response.token;
});
return this._pendingTokenRequests[root];
}
/**
* Returns an unexpired token for the current `portal`.
*/
private getFreshToken() {
if (
this.token &&
this.tokenExpires &&
this.tokenExpires.getTime() > Date.now()
) {
return Promise.resolve(this.token);
}
if (!this._pendingTokenRequests[this.portal]) {
this._pendingTokenRequests[this.portal] = this.refreshSession().then(
session => {
this._pendingTokenRequests[this.portal] = null;
return session.token;
}
);
}
return this._pendingTokenRequests[this.portal];
}
/**
* Refreshes the current `token` and `tokenExpires` with `username` and
* `password`.
*/
private refreshWithUsernameAndPassword() {
return generateToken(`${this.portal}/generateToken`, {
username: this.username,
password: this.password,
expiration: this.tokenDuration
}).then((response: any) => {
this._token = response.token;
this._tokenExpires = new Date(response.expires);
return this;
});
}
/**
* Refreshes the current `token` and `tokenExpires` with `refreshToken`.
*/
private refreshWithRefreshToken() {
if (
this.refreshToken &&
this.refreshTokenExpires &&
this.refreshTokenExpires.getTime() < Date.now()
) {
return this.refreshRefreshToken();
}
return fetchToken(`${this.portal}/oauth2/token`, {
client_id: this.clientId,
refresh_token: this.refreshToken,
grant_type: "refresh_token"
}).then(response => {
this._token = response.token;
this._tokenExpires = response.expires;
return this;
});
}
/**
* Exchanges an expired `refreshToken` for a new one also updates `token` and
* `tokenExpires`.
*/
private refreshRefreshToken() {
return fetchToken(`${this.portal}/oauth2/token`, {
client_id: this.clientId,
refresh_token: this.refreshToken,
redirect_uri: this.redirectUri,
grant_type: "exchange_refresh_token"
}).then(response => {
this._token = response.token;
this._tokenExpires = response.expires;
this._refreshToken = response.refreshToken;
this._refreshTokenExpires = new Date(
Date.now() + (this.refreshTokenTTL - 1) * 60 * 1000
);
return this;
});
}
}