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backend/node_modules/google-auth-library/build/src/auth/idtokenclient.js

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+"use strict";
+// Copyright 2020 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.IdTokenClient = void 0;
+const oauth2client_1 = require("./oauth2client");
+class IdTokenClient extends oauth2client_1.OAuth2Client {
+    targetAudience;
+    idTokenProvider;
+    /**
+     * Google ID Token client
+     *
+     * Retrieve ID token from the metadata server.
+     * See: https://cloud.google.com/docs/authentication/get-id-token#metadata-server
+     */
+    constructor(options) {
+        super(options);
+        this.targetAudience = options.targetAudience;
+        this.idTokenProvider = options.idTokenProvider;
+    }
+    async getRequestMetadataAsync() {
+        if (!this.credentials.id_token ||
+            !this.credentials.expiry_date ||
+            this.isTokenExpiring()) {
+            const idToken = await this.idTokenProvider.fetchIdToken(this.targetAudience);
+            this.credentials = {
+                id_token: idToken,
+                expiry_date: this.getIdTokenExpiryDate(idToken),
+            };
+        }
+        const headers = new Headers({
+            authorization: 'Bearer ' + this.credentials.id_token,
+        });
+        return { headers };
+    }
+    getIdTokenExpiryDate(idToken) {
+        const payloadB64 = idToken.split('.')[1];
+        if (payloadB64) {
+            const payload = JSON.parse(Buffer.from(payloadB64, 'base64').toString('ascii'));
+            return payload.exp * 1000;
+        }
+    }
+}
+exports.IdTokenClient = IdTokenClient;
+//# sourceMappingURL=idtokenclient.js.map