/opt/canhelp/node_modules/google-auth-library/build/src/auth
Edit: /opt/canhelp/node_modules/google-auth-library/build/src/auth/filesubjecttokensupplier.js (3515B)
"use strict";
// Copyright 2024 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.FileSubjectTokenSupplier = void 0;
const util_1 = require("util");
const fs = require("fs");
// fs.readfile is undefined in browser karma tests causing
// `npm run browser-test` to fail as test.oauth2.ts imports this file via
// src/index.ts.
// Fallback to void function to avoid promisify throwing a TypeError.
const readFile = (0, util_1.promisify)(fs.readFile ?? (() => { }));
const realpath = (0, util_1.promisify)(fs.realpath ?? (() => { }));
const lstat = (0, util_1.promisify)(fs.lstat ?? (() => { }));
/**
* Internal subject token supplier implementation used when a file location
* is configured in the credential configuration used to build an {@link IdentityPoolClient}
*/
class FileSubjectTokenSupplier {
filePath;
formatType;
subjectTokenFieldName;
/**
* Instantiates a new file based subject token supplier.
* @param opts The file subject token supplier options to build the supplier
* with.
*/
constructor(opts) {
this.filePath = opts.filePath;
this.formatType = opts.formatType;
this.subjectTokenFieldName = opts.subjectTokenFieldName;
}
/**
* Returns the subject token stored at the file specified in the constructor.
* @param context {@link ExternalAccountSupplierContext} from the calling
* {@link IdentityPoolClient}, contains the requested audience and subject
* token type for the external account identity. Not used.
*/
async getSubjectToken() {
// Make sure there is a file at the path. lstatSync will throw if there is
// nothing there.
let parsedFilePath = this.filePath;
try {
// Resolve path to actual file in case of symlink. Expect a thrown error
// if not resolvable.
parsedFilePath = await realpath(parsedFilePath);
if (!(await lstat(parsedFilePath)).isFile()) {
throw new Error();
}
}
catch (err) {
if (err instanceof Error) {
err.message = `The file at ${parsedFilePath} does not exist, or it is not a file. ${err.message}`;
}
throw err;
}
let subjectToken;
const rawText = await readFile(parsedFilePath, { encoding: 'utf8' });
if (this.formatType === 'text') {
subjectToken = rawText;
}
else if (this.formatType === 'json' && this.subjectTokenFieldName) {
const json = JSON.parse(rawText);
subjectToken = json[this.subjectTokenFieldName];
}
if (!subjectToken) {
throw new Error('Unable to parse the subject_token from the credential_source file');
}
return subjectToken;
}
}
exports.FileSubjectTokenSupplier = FileSubjectTokenSupplier;
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