├── public └── .gitkeep ├── src ├── views │ └── .gitkeep ├── services │ └── .gitkeep ├── validations │ └── .gitkeep ├── routes │ ├── api-v1.js │ └── auth.js ├── config │ ├── database.js │ └── passport-oauth2.js ├── middleware │ └── tokenAuthentication.js ├── controllers │ ├── userController.js │ └── authController.js ├── models │ └── user.js └── rules │ └── authRule.js ├── .env.example ├── README.md ├── app.js ├── package.json ├── .gitignore └── LICENSE /public/.gitkeep: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /src/views/.gitkeep: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /src/services/.gitkeep: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /src/validations/.gitkeep: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /src/routes/api-v1.js: -------------------------------------------------------------------------------- 1 | const express = require("express"); 2 | const router = express.Router(); 3 | 4 | const userController = require("../controllers/userController"); 5 | 6 | router.post("/user", userController.get); 7 | 8 | module.exports = router; 9 | -------------------------------------------------------------------------------- /src/config/database.js: -------------------------------------------------------------------------------- 1 | const mysql = require("mysql2"); 2 | 3 | const conn = mysql.createConnection({ 4 | host: process.env.DB_HOST, 5 | port: process.env.DB_PORT, 6 | user: process.env.DB_USERNAME, 7 | password: process.env.DB_PASSWORD, 8 | database: process.env.DB_NAME, 9 | }); 10 | 11 | module.exports = conn; 12 | -------------------------------------------------------------------------------- /.env.example: -------------------------------------------------------------------------------- 1 | NODE_ENV=development 2 | PORT=3000 3 | APP_SECRET=secret 4 | 5 | # Mysql Database 6 | DB_HOST=localhost 7 | DB_PORT=3306 8 | DB_SECRET=secret 9 | DB_CONNECTION=mysql 10 | DB_USERNAME= 11 | DB_PASSWORD= 12 | DB_NAME= 13 | 14 | # OAuth2Strategy for GOOGLE 15 | OAUTH2_CLIENT_ID= 16 | OAUTH2_CLIENT_SECRET= 17 | OAUTH2_CALLBACK_URL=http://localhost:3000/auth/google/callback 18 | OAUTH2_TOKEN_URL=https://oauth2.googleapis.com/token 19 | OAUTH2_AUTHORIZATION_URL=https://accounts.google.com/o/oauth2/v2/auth 20 | -------------------------------------------------------------------------------- /src/routes/auth.js: -------------------------------------------------------------------------------- 1 | const express = require("express"); 2 | const router = express.Router(); 3 | 4 | //Controllers 5 | const authController = require("../controllers/authController"); 6 | 7 | //Validations 8 | const { 9 | userRegisterValidationRules, 10 | userLoginValidationRules, 11 | } = require("../rules/authRule"); 12 | 13 | router.post( 14 | "/register", 15 | userRegisterValidationRules(), 16 | authController.register 17 | ); 18 | router.post("/login", userLoginValidationRules(), authController.login); 19 | 20 | module.exports = router; 21 | -------------------------------------------------------------------------------- /src/middleware/tokenAuthentication.js: -------------------------------------------------------------------------------- 1 | const jwt = require("jsonwebtoken"); 2 | 3 | const tokenAuthentication = (req, res, next) => { 4 | const token = req.headers.authorization; 5 | 6 | if (!token) { 7 | return res.status(401).json({ message: "Authentication required" }); 8 | } 9 | 10 | jwt.verify(token, process.env.APP_SECRET, (err, user) => { 11 | if (err) { 12 | return res.status(403).json({ message: "Invalid token" }); 13 | } 14 | req.user = user; 15 | next(); 16 | }); 17 | }; 18 | 19 | module.exports = tokenAuthentication; 20 | -------------------------------------------------------------------------------- /src/controllers/userController.js: -------------------------------------------------------------------------------- 1 | const User = require("../models/user"); 2 | 3 | const userController = { 4 | // Get logged user details 5 | get: async (req, res) => { 6 | try { 7 | const user = await User.findById(req.user.userId); 8 | 9 | if (!user) { 10 | return res.status(404).json({ message: "User not found" }); 11 | } 12 | 13 | const userDetails = { 14 | id: user.id, 15 | username: user.username, 16 | email: user.email, 17 | }; 18 | 19 | res.status(200).json({ userDetails }); 20 | } catch (error) { 21 | console.error(error); 22 | res.status(500).json({ message: "Server error" }); 23 | } 24 | }, 25 | }; 26 | 27 | module.exports = userController; 28 | -------------------------------------------------------------------------------- /src/models/user.js: -------------------------------------------------------------------------------- 1 | const { DataTypes } = require("sequelize"); 2 | const db = require("../config/database"); 3 | const bcrypt = require("bcrypt"); 4 | 5 | const User = db.define( 6 | "User", 7 | { 8 | username: { 9 | type: DataTypes.STRING, 10 | allowNull: false, 11 | unique: true, 12 | }, 13 | email: { 14 | type: DataTypes.STRING, 15 | allowNull: false, 16 | unique: true, 17 | validate: { 18 | isEmail: true, 19 | }, 20 | }, 21 | password: { 22 | type: DataTypes.STRING, 23 | allowNull: false, 24 | }, 25 | }, 26 | { 27 | tableName: "users", // Specify your custom table name here 28 | } 29 | ); 30 | 31 | // Hash the user's password before saving it to the database 32 | User.beforeCreate(async (user) => { 33 | const saltRounds = 10; 34 | user.password = await bcrypt.hash(user.password, saltRounds); 35 | }); 36 | 37 | module.exports = User; 38 | -------------------------------------------------------------------------------- /src/rules/authRule.js: -------------------------------------------------------------------------------- 1 | const { body } = require("express-validator"); 2 | 3 | const userRegisterValidationRules = () => { 4 | return [ 5 | body("username") 6 | .notEmpty() 7 | .isLength({ min: 3, max: 20 }) 8 | .withMessage("Username must be between 3 and 20 characters"), 9 | 10 | body("password") 11 | .notEmpty() 12 | .isLength({ min: 8, max: 20 }) 13 | .withMessage("Password must be between 8 and 20 characters"), 14 | 15 | body("email").notEmpty().isEmail().withMessage("Invalid email address"), 16 | ]; 17 | }; 18 | 19 | const userLoginValidationRules = () => { 20 | return [ 21 | body("email").notEmpty().isEmail().withMessage("Invalid email address"), 22 | 23 | body("password") 24 | .notEmpty() 25 | .isLength({ min: 8, max: 20 }) 26 | .withMessage("Password must be between 8 and 20 characters"), 27 | ]; 28 | }; 29 | 30 | module.exports = { 31 | userRegisterValidationRules, 32 | userLoginValidationRules, 33 | }; 34 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Express with passport Oauth2 2 | ## Description 3 | This is a simple example of how to use passport with oauth2. It uses the google strategy to authenticate users. 4 | ## Installation 5 | 1. Clone the repository 6 | 2. Run `npm install` 7 | 3. Create a `.env` file in the root directory and add the following variables: 8 | ```bash 9 | NODE_ENV=development 10 | PORT=3000 11 | APP_SECRET=your_app_secret 12 | 13 | # Database 14 | DB_HOST=localhost 15 | DB_PORT=3306 16 | DB_CONNECTION=mysql 17 | DB_USERNAME=your_db_user 18 | DB_PASSWORD=your_db_password 19 | DB_NAME=your_db_name 20 | 21 | # Google Oauth2 22 | OAUTH2_AUTHORIZATION_URL=https://accounts.google.com/o/oauth2/v2/auth 23 | OAUTH2_TOKEN_URL=https://oauth2.googleapis.com/token 24 | AUTH_CLIENT_ID=your_client_id 25 | AUTH_CLIENT_SECRET=your_client_secret 26 | AUTH_CALLBACK_URL=http://localhost:3000/auth/google/callback 27 | ``` 28 | 4. Run `npm start` 29 | 5. Open your browser and go to `http://localhost:3000` 30 | 31 | ## License 32 | [Apace 2.0](https://www.apache.org/licenses/LICENSE-2.0) 33 | -------------------------------------------------------------------------------- /app.js: -------------------------------------------------------------------------------- 1 | const express = require("express"); 2 | const passport = require("passport"); 3 | const session = require("express-session"); 4 | const cors = require('cors'); 5 | const bodyParser = require('body-parser'); 6 | 7 | const authenticateToken = require("./src/middleware/tokenAuthentication"); 8 | const authRoutes = require("./src/routes/auth"); 9 | const apiRoutes = require("./src/routes/api-v1"); 10 | 11 | const app = express(); 12 | const port = process.env.PORT || 3000; 13 | 14 | //middlewares 15 | app.use(bodyParser.json()); 16 | app.use(express.json()); 17 | app.use(cors()); // Allow all origins (not recommended for production) 18 | 19 | app.use( 20 | session({ 21 | secret: process.env.APP_SECRET, 22 | resave: true, 23 | saveUninitialized: true, 24 | }) 25 | ); 26 | app.use(passport.initialize()); 27 | app.use(passport.session()); 28 | 29 | app.use("/v1/auth", authRoutes); // Define OAuth2 authentication routes 30 | app.use("/v1", authenticateToken, apiRoutes); // Protect the API routes with token-based authentication middleware 31 | 32 | app.listen(port, () => { 33 | console.log(`Server is running on port ${port}`); 34 | }); 35 | -------------------------------------------------------------------------------- /src/config/passport-oauth2.js: -------------------------------------------------------------------------------- 1 | const passport = require("passport"); 2 | const OAuth2Strategy = require("passport-oauth2").Strategy; 3 | const User = require("../models/user"); 4 | 5 | passport.use( 6 | new OAuth2Strategy( 7 | { 8 | authorizationURL: process.env.OAUTH2_AUTHORIZATION_URL, 9 | tokenURL: process.env.OAUTH2_TOKEN_URL, 10 | clientID: process.env.OAUTH2_CLIENT_ID, 11 | clientSecret: process.env.OAUTH2_CLIENT_SECRET, 12 | callbackURL: process.env.OAUTH2_CALLBACK_URL, 13 | }, 14 | async (accessToken, refreshToken, profile, done) => { 15 | try { 16 | // Check if the user exists in your database or create a new user record 17 | let user = await User.findOne({ where: { oauth2Id: profile.id } }); 18 | 19 | if (!user) { 20 | user = await User.create({ 21 | oauth2Id: profile.id, 22 | username: profile.username, 23 | email: profile.email, 24 | }); 25 | } 26 | 27 | return done(null, user); 28 | } catch (error) { 29 | return done(error); 30 | } 31 | } 32 | ) 33 | ); 34 | 35 | // Serialization and deserialization methods (as shown in previous responses) 36 | -------------------------------------------------------------------------------- /package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "expressjs-passport-oauth2", 3 | "version": "1.0.0", 4 | "description": "NodeJS Express with passport Oauth2 and MYSQL.", 5 | "main": "app.js", 6 | "scripts": { 7 | "test": "node app.js" 8 | }, 9 | "repository": { 10 | "type": "git", 11 | "url": "git+https://github.com/supuna97/expressjs-passport-oauth2.git" 12 | }, 13 | "keywords": [ 14 | "nodejs", 15 | "expressjs", 16 | "expressjs-oauth2", 17 | "expressjs-auth", 18 | "expressjs-passport-oauth2", 19 | "express-passport", 20 | "express-passport-oauth2", 21 | "nodemon", 22 | "mysql2", 23 | "mysql", 24 | "express-validator" 25 | ], 26 | "author": "Supun Nanayakkara", 27 | "license": "ISC", 28 | "bugs": { 29 | "url": "https://github.com/supuna97/expressjs-passport-oauth2/issues" 30 | }, 31 | "homepage": "https://github.com/supuna97/expressjs-passport-oauth2#readme", 32 | "dependencies": { 33 | "bcrypt": "^5.1.1", 34 | "body-parser": "^1.20.2", 35 | "cors": "^2.8.5", 36 | "dotenv": "^16.3.1", 37 | "express": "^4.21.2", 38 | "express-validator": "^7.0.1", 39 | "jsonwebtoken": "^9.0.2", 40 | "mysql2": "^3.9.8", 41 | "nodemon": "^3.0.1", 42 | "passport": "^0.6.0", 43 | "passport-oauth2": "^1.7.0", 44 | "sequelize": "^6.33.0" 45 | } 46 | } 47 | -------------------------------------------------------------------------------- /src/controllers/authController.js: -------------------------------------------------------------------------------- 1 | const bcrypt = require("bcrypt"); 2 | const jwt = require("jsonwebtoken"); 3 | const User = require("../models/user"); 4 | 5 | const authController = { 6 | register: async (req, res) => { 7 | try { 8 | const { username, email, password } = req.body; 9 | const user = await User.create({ username, email, password }); 10 | 11 | res.status(201).json({ user: user, message: "User registered successfully" }); 12 | } catch (error) { 13 | res.status(500).json({ message: "Error registering user" }); 14 | } 15 | }, 16 | 17 | login: async (req, res) => { 18 | const { email, password } = req.body; 19 | 20 | try { 21 | const user = await User.findOne({ where: { email } }); 22 | 23 | if (!user || !(await bcrypt.compare(password, user.password))) { 24 | return res.status(401).json({ message: "Invalid credentials" }); 25 | } 26 | 27 | // Generate a JWT token upon successful login 28 | const token = jwt.sign({ userId: user.id }, process.env.APP_SECRET, { 29 | expiresIn: "1h", 30 | }); 31 | 32 | res.status(200).json({ token: token, message: "User logged successfully" }); 33 | } catch (error) { 34 | res.status(500).json({ message: "Login failed" }); 35 | } 36 | }, 37 | }; 38 | 39 | module.exports = authController; 40 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Logs 2 | logs 3 | *.log 4 | npm-debug.log* 5 | yarn-debug.log* 6 | yarn-error.log* 7 | lerna-debug.log* 8 | .pnpm-debug.log* 9 | 10 | # Diagnostic reports (https://nodejs.org/api/report.html) 11 | report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json 12 | 13 | # Runtime data 14 | pids 15 | *.pid 16 | *.seed 17 | *.pid.lock 18 | 19 | # Directory for instrumented libs generated by jscoverage/JSCover 20 | lib-cov 21 | 22 | # Coverage directory used by tools like istanbul 23 | coverage 24 | *.lcov 25 | 26 | # nyc test coverage 27 | .nyc_output 28 | 29 | # Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files) 30 | .grunt 31 | 32 | # Bower dependency directory (https://bower.io/) 33 | bower_components 34 | 35 | # node-waf configuration 36 | .lock-wscript 37 | 38 | # Compiled binary addons (https://nodejs.org/api/addons.html) 39 | build/Release 40 | 41 | # Dependency directories 42 | node_modules/ 43 | jspm_packages/ 44 | 45 | # Snowpack dependency directory (https://snowpack.dev/) 46 | web_modules/ 47 | 48 | # TypeScript cache 49 | *.tsbuildinfo 50 | 51 | # Optional npm cache directory 52 | .npm 53 | 54 | # Optional eslint cache 55 | .eslintcache 56 | 57 | # Optional stylelint cache 58 | .stylelintcache 59 | 60 | # Microbundle cache 61 | .rpt2_cache/ 62 | .rts2_cache_cjs/ 63 | .rts2_cache_es/ 64 | .rts2_cache_umd/ 65 | 66 | # Optional REPL history 67 | .node_repl_history 68 | 69 | # Output of 'npm pack' 70 | *.tgz 71 | 72 | # Yarn Integrity file 73 | .yarn-integrity 74 | 75 | # dotenv environment variable files 76 | .env 77 | .env.development.local 78 | .env.test.local 79 | .env.production.local 80 | .env.local 81 | 82 | # parcel-bundler cache (https://parceljs.org/) 83 | .cache 84 | .parcel-cache 85 | 86 | # Next.js build output 87 | .next 88 | out 89 | 90 | # Nuxt.js build / generate output 91 | .nuxt 92 | dist 93 | 94 | # Gatsby files 95 | .cache/ 96 | # Comment in the public line in if your project uses Gatsby and not Next.js 97 | # https://nextjs.org/blog/next-9-1#public-directory-support 98 | # public 99 | 100 | # vuepress build output 101 | .vuepress/dist 102 | 103 | # vuepress v2.x temp and cache directory 104 | .temp 105 | .cache 106 | 107 | # Docusaurus cache and generated files 108 | .docusaurus 109 | 110 | # Serverless directories 111 | .serverless/ 112 | 113 | # FuseBox cache 114 | .fusebox/ 115 | 116 | # DynamoDB Local files 117 | .dynamodb/ 118 | 119 | # TernJS port file 120 | .tern-port 121 | 122 | # Stores VSCode versions used for testing VSCode extensions 123 | .vscode-test 124 | 125 | # yarn v2 126 | .yarn/cache 127 | .yarn/unplugged 128 | .yarn/build-state.yml 129 | .yarn/install-state.gz 130 | .pnp.* 131 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. Definitions. 8 | 9 | "License" shall mean the terms and conditions for use, reproduction, 10 | and distribution as defined by Sections 1 through 9 of this document. 11 | 12 | "Licensor" shall mean the copyright owner or entity authorized by 13 | the copyright owner that is granting the License. 14 | 15 | "Legal Entity" shall mean the union of the acting entity and all 16 | other entities that control, are controlled by, or are under common 17 | control with that entity. For the purposes of this definition, 18 | "control" means (i) the power, direct or indirect, to cause the 19 | direction or management of such entity, whether by contract or 20 | otherwise, or (ii) ownership of fifty percent (50%) or more of the 21 | outstanding shares, or (iii) beneficial ownership of such entity. 22 | 23 | "You" (or "Your") shall mean an individual or Legal Entity 24 | exercising permissions granted by this License. 25 | 26 | "Source" form shall mean the preferred form for making modifications, 27 | including but not limited to software source code, documentation 28 | source, and configuration files. 29 | 30 | "Object" form shall mean any form resulting from mechanical 31 | transformation or translation of a Source form, including but 32 | not limited to compiled object code, generated documentation, 33 | and conversions to other media types. 34 | 35 | "Work" shall mean the work of authorship, whether in Source or 36 | Object form, made available under the License, as indicated by a 37 | copyright notice that is included in or attached to the work 38 | (an example is provided in the Appendix below). 39 | 40 | "Derivative Works" shall mean any work, whether in Source or Object 41 | form, that is based on (or derived from) the Work and for which the 42 | editorial revisions, annotations, elaborations, or other modifications 43 | represent, as a whole, an original work of authorship. For the purposes 44 | of this License, Derivative Works shall not include works that remain 45 | separable from, or merely link (or bind by name) to the interfaces of, 46 | the Work and Derivative Works thereof. 47 | 48 | "Contribution" shall mean any work of authorship, including 49 | the original version of the Work and any modifications or additions 50 | to that Work or Derivative Works thereof, that is intentionally 51 | submitted to Licensor for inclusion in the Work by the copyright owner 52 | or by an individual or Legal Entity authorized to submit on behalf of 53 | the copyright owner. For the purposes of this definition, "submitted" 54 | means any form of electronic, verbal, or written communication sent 55 | to the Licensor or its representatives, including but not limited to 56 | communication on electronic mailing lists, source code control systems, 57 | and issue tracking systems that are managed by, or on behalf of, the 58 | Licensor for the purpose of discussing and improving the Work, but 59 | excluding communication that is conspicuously marked or otherwise 60 | designated in writing by the copyright owner as "Not a Contribution." 61 | 62 | "Contributor" shall mean Licensor and any individual or Legal Entity 63 | on behalf of whom a Contribution has been received by Licensor and 64 | subsequently incorporated within the Work. 65 | 66 | 2. Grant of Copyright License. Subject to the terms and conditions of 67 | this License, each Contributor hereby grants to You a perpetual, 68 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable 69 | copyright license to reproduce, prepare Derivative Works of, 70 | publicly display, publicly perform, sublicense, and distribute the 71 | Work and such Derivative Works in Source or Object form. 72 | 73 | 3. Grant of Patent License. Subject to the terms and conditions of 74 | this License, each Contributor hereby grants to You a perpetual, 75 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable 76 | (except as stated in this section) patent license to make, have made, 77 | use, offer to sell, sell, import, and otherwise transfer the Work, 78 | where such license applies only to those patent claims licensable 79 | by such Contributor that are necessarily infringed by their 80 | Contribution(s) alone or by combination of their Contribution(s) 81 | with the Work to which such Contribution(s) was submitted. If You 82 | institute patent litigation against any entity (including a 83 | cross-claim or counterclaim in a lawsuit) alleging that the Work 84 | or a Contribution incorporated within the Work constitutes direct 85 | or contributory patent infringement, then any patent licenses 86 | granted to You under this License for that Work shall terminate 87 | as of the date such litigation is filed. 88 | 89 | 4. Redistribution. You may reproduce and distribute copies of the 90 | Work or Derivative Works thereof in any medium, with or without 91 | modifications, and in Source or Object form, provided that You 92 | meet the following conditions: 93 | 94 | (a) You must give any other recipients of the Work or 95 | Derivative Works a copy of this License; and 96 | 97 | (b) You must cause any modified files to carry prominent notices 98 | stating that You changed the files; and 99 | 100 | (c) You must retain, in the Source form of any Derivative Works 101 | that You distribute, all copyright, patent, trademark, and 102 | attribution notices from the Source form of the Work, 103 | excluding those notices that do not pertain to any part of 104 | the Derivative Works; and 105 | 106 | (d) If the Work includes a "NOTICE" text file as part of its 107 | distribution, then any Derivative Works that You distribute must 108 | include a readable copy of the attribution notices contained 109 | within such NOTICE file, excluding those notices that do not 110 | pertain to any part of the Derivative Works, in at least one 111 | of the following places: within a NOTICE text file distributed 112 | as part of the Derivative Works; within the Source form or 113 | documentation, if provided along with the Derivative Works; or, 114 | within a display generated by the Derivative Works, if and 115 | wherever such third-party notices normally appear. The contents 116 | of the NOTICE file are for informational purposes only and 117 | do not modify the License. You may add Your own attribution 118 | notices within Derivative Works that You distribute, alongside 119 | or as an addendum to the NOTICE text from the Work, provided 120 | that such additional attribution notices cannot be construed 121 | as modifying the License. 122 | 123 | You may add Your own copyright statement to Your modifications and 124 | may provide additional or different license terms and conditions 125 | for use, reproduction, or distribution of Your modifications, or 126 | for any such Derivative Works as a whole, provided Your use, 127 | reproduction, and distribution of the Work otherwise complies with 128 | the conditions stated in this License. 129 | 130 | 5. Submission of Contributions. Unless You explicitly state otherwise, 131 | any Contribution intentionally submitted for inclusion in the Work 132 | by You to the Licensor shall be under the terms and conditions of 133 | this License, without any additional terms or conditions. 134 | Notwithstanding the above, nothing herein shall supersede or modify 135 | the terms of any separate license agreement you may have executed 136 | with Licensor regarding such Contributions. 137 | 138 | 6. Trademarks. This License does not grant permission to use the trade 139 | names, trademarks, service marks, or product names of the Licensor, 140 | except as required for reasonable and customary use in describing the 141 | origin of the Work and reproducing the content of the NOTICE file. 142 | 143 | 7. Disclaimer of Warranty. Unless required by applicable law or 144 | agreed to in writing, Licensor provides the Work (and each 145 | Contributor provides its Contributions) on an "AS IS" BASIS, 146 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 147 | implied, including, without limitation, any warranties or conditions 148 | of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A 149 | PARTICULAR PURPOSE. You are solely responsible for determining the 150 | appropriateness of using or redistributing the Work and assume any 151 | risks associated with Your exercise of permissions under this License. 152 | 153 | 8. Limitation of Liability. In no event and under no legal theory, 154 | whether in tort (including negligence), contract, or otherwise, 155 | unless required by applicable law (such as deliberate and grossly 156 | negligent acts) or agreed to in writing, shall any Contributor be 157 | liable to You for damages, including any direct, indirect, special, 158 | incidental, or consequential damages of any character arising as a 159 | result of this License or out of the use or inability to use the 160 | Work (including but not limited to damages for loss of goodwill, 161 | work stoppage, computer failure or malfunction, or any and all 162 | other commercial damages or losses), even if such Contributor 163 | has been advised of the possibility of such damages. 164 | 165 | 9. Accepting Warranty or Additional Liability. While redistributing 166 | the Work or Derivative Works thereof, You may choose to offer, 167 | and charge a fee for, acceptance of support, warranty, indemnity, 168 | or other liability obligations and/or rights consistent with this 169 | License. However, in accepting such obligations, You may act only 170 | on Your own behalf and on Your sole responsibility, not on behalf 171 | of any other Contributor, and only if You agree to indemnify, 172 | defend, and hold each Contributor harmless for any liability 173 | incurred by, or claims asserted against, such Contributor by reason 174 | of your accepting any such warranty or additional liability. 175 | 176 | END OF TERMS AND CONDITIONS 177 | 178 | APPENDIX: How to apply the Apache License to your work. 179 | 180 | To apply the Apache License to your work, attach the following 181 | boilerplate notice, with the fields enclosed by brackets "[]" 182 | replaced with your own identifying information. (Don't include 183 | the brackets!) The text should be enclosed in the appropriate 184 | comment syntax for the file format. We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | --------------------------------------------------------------------------------