mirror of
https://github.com/vector-im/element-call.git
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89 lines
2.3 KiB
TypeScript
89 lines
2.3 KiB
TypeScript
/*
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Copyright 2023, 2024 New Vector Ltd.
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SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
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Please see LICENSE in the repository root for full details.
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*/
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import { type IOpenIDToken, type MatrixClient } from "matrix-js-sdk";
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import { logger } from "matrix-js-sdk/lib/logger";
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import { FailToGetOpenIdToken } from "../utils/errors";
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import { doNetworkOperationWithRetry } from "../utils/matrix";
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export interface SFUConfig {
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url: string;
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jwt: string;
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}
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// The bits we need from MatrixClient
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export type OpenIDClientParts = Pick<
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MatrixClient,
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"getOpenIdToken" | "getDeviceId"
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>;
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/**
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* Gets a bearer token from the homeserver and then use it to authenticate
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* to the matrix RTC backend in order to get acces to the SFU.
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* It has built-in retry for calls to the homeserver with a backoff policy.
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* @param client
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* @param serviceUrl
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* @param matrixRoomId
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* @returns Object containing the token information
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* @throws FailToGetOpenIdToken
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*/
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export async function getSFUConfigWithOpenID(
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client: OpenIDClientParts,
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serviceUrl: string,
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matrixRoomId: string,
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): Promise<SFUConfig> {
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let openIdToken: IOpenIDToken;
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try {
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openIdToken = await doNetworkOperationWithRetry(async () =>
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client.getOpenIdToken(),
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);
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} catch (error) {
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throw new FailToGetOpenIdToken(
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error instanceof Error ? error : new Error("Unknown error"),
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);
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}
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logger.debug("Got openID token", openIdToken);
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logger.info(`Trying to get JWT for focus ${serviceUrl}...`);
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const sfuConfig = await getLiveKitJWT(
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client,
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serviceUrl,
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matrixRoomId,
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openIdToken,
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);
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logger.info(`Got JWT from call's active focus URL.`);
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return sfuConfig;
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}
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async function getLiveKitJWT(
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client: OpenIDClientParts,
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livekitServiceURL: string,
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roomName: string,
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openIDToken: IOpenIDToken,
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): Promise<SFUConfig> {
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try {
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const res = await fetch(livekitServiceURL + "/sfu/get", {
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method: "POST",
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headers: {
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"Content-Type": "application/json",
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},
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body: JSON.stringify({
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room: roomName,
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openid_token: openIDToken,
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device_id: client.getDeviceId(),
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}),
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});
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if (!res.ok) {
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throw new Error("SFU Config fetch failed with status code " + res.status);
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}
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return await res.json();
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} catch (e) {
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throw new Error("SFU Config fetch failed with exception " + e);
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}
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}
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