docs(passport): translation for passport tutorial (#2235)

docs/source/en/tutorials/passport.md

@@ -1 +1,283 @@
-this document is still waiting for translation, see [Chinese Version](/zh-cn/tutorials/passport.html)
+## Title: Passport
+
+**`Login authentication`** is a common business scenario, including "account password login" and "third-party unified login".
+
+Among them, we often use the latter, such as Google, GitHub, QQ unified login, which are based on [OAuth](https://oauth.net/2/) specification.
+
+[Passport](http://www.passportjs.org/) is a highly scalable authentication middleware that supports the `Strategy` of `Github` ,`Twitter`,`Facebook`, and other well-known service vendors. It also supports login authorization verification via account passwords.
+
+Egg provides an [egg-passport](https://github.com/eggjs/egg-passport) plugin which encapsulates general logic such as callback processing after initialization and the success of authentication so that the developers can use Passport with just a few API calls.
+
+The execution sequence of [Passport](http://www.passportjs.org/) is as follows:
+
+* User accesses page
+* Check Session
+* Intercept and jump to authentication login page
+* Strategy Authentication
+* Check and store user information
+* Serialize user information to Session
+* Jump to the specified page
+
+## Using egg-passport
+
+Below, we will use GitHub login as an example to demonstrate how to use it.
+
+### Installation
+
+```bash
+$ npm i --save egg-passport
+$ npm i --save egg-passport-github
+```
+
+For more plugins, see [GitHub Topic - egg-passport](https://github.com/topics/egg-passport) .
+
+### Configuration
+
+**Enabling the plugin:**
+
+```js
+// config/plugin.js
+module.exports.passport = {
+  enable: true,
+  package: 'egg-passport'
+};
+
+module.exports.passportGithub = {
+  enable: true,
+  package: 'egg-passport-github'
+};
+```
+
+**Configuration:**
+
+Note: The [egg-passport](https://github.com/eggjs/egg-passport) standardizes the configuration fields, which are unified as `key` and `secret`.
+
+```js
+// config/default.js
+config.passportGithub = {
+  key: 'your_clientID',
+  secret: 'your_clientSecret'
+};
+```
+
+**note:**
+
+* Create a [GitHub OAuth Apps](https://github.com/settings/applications/new) to get the `clientID` and `clientSecret` information.
+* Specify a `callbackURL`, such as `http://127.0.0.1:7001/passport/github/callback`
+    - You need to update to the corresponding domain name when deploying online
+    - The path is configured via `options.callbackURL`, which defaults to `/passport/${strategy}/callback`
+
+### Mounting Routes
+
+```js
+// app/router.js
+module.exports = app => {
+  const { router, controller } = app;
+
+  // Mount the authentication route
+  app.passport.mount('github');
+
+  // The mount above is syntactic sugar, which is equivalent to
+  // const github = app.passport.authenticate('github', {});
+  // router.get('/passport/github', github);
+  // router.get('/passport/github/callback', github);
+}
+```
+
+### User Information Processing
+
+Then we also need:
+
+* When signing in for the first time, you generally need to put user information into the repository and record the Session.
+* In the second login, the user information obtained from OAuth or Session, and the database is read to get the complete user information.
+
+```js
+// app.js
+module.exports = app => {
+  app.passport.verify(async (ctx, user) => {
+    // Check user
+    assert(user.provider, 'user.provider should exists');
+    assert(user.id, 'user.id should exists');
+
+    // Find user information from the database
+    //
+    // Authorization Table
+    // column   | desc
+    // ---      | --
+    // provider | provider name, like github, twitter, facebook, weibo and so on
+    // uid      | provider unique id
+    // user_id  | current application user id
+    const auth = await ctx.model.Authorization.findOne({
+      uid: user.id,
+      provider: user.provider,
+    });
+    const existsUser = await ctx.model.User.findOne({ id: auth.user_id });
+    if (existsUser) {
+      return existsUser;
+    }
+    // Call service to register a new user
+    const newUser = await ctx.service.user.register(user);
+    return newUser;
+  });
+
+  // Serialize and store the user information into session. Generally, only a few fields need to be streamlined/saved.
+  app.passport.serializeUser(async (ctx, user) => {
+  // process user
+  // ...
+  // return user;
+  });
+
+  // Deserialize the user information from the session, check the database to get the complete information
+  app.passport.deserializeUser(async (ctx, user) => {
+  // process user
+  // ...
+  // return user;
+  });
+};
+```
+
+At this point, we have completed all the configurations. For a complete example, see: [eggjs/examples/passport](https://github.com/eggjs/examples/tree/master/passport)
+
+### API
+
+[egg-passport](https://github.com/eggjs/egg-passport) provides the following extensions:
+
+* `ctx.user` - Get current logged in user information
+* `ctx.isAuthenticated()` - Check if the request is authorized
+* `ctx.login(user, [options])` - Start a login session for the user
+* `ctx.logout()` - Exit and clear user information from session
+* `ctx.session.returnTo=` - Set redirect address after authentication page success
+
+The API also be provided for:
+
+* `app.passport.verify(async (ctx, user) => {})` - Check user
+* `app.passport.serializeUser(async (ctx, user) => {})` - Serialize user information into session
+* `app.passport.deserializeUser(async (ctx, user) => {})` - Deserialize user information from the session
+* `app.passport.authenticate(strategy, options)` - Generate the specified authentication middleware
+    - `options.successRedirect` - specifies the redirect address after successful authentication
+    - `options.loginURL` - jump login address, defaults to `/passport/${strategy}`
+    - `options.callbackURL` - callback address after authorization, defaults to `/passport/${strategy}/callback`
+* `app.passport.mount(strategy, options)` - Syntactic sugar for developers to configure routing
+
+## Using Passport Ecosystem
+
+[Passport](http://www.passportjs.org/) has many middleware and it is impossible to have the second encapsulation.
+Next, let's look at how to use Passport middleware directly in the framework.
+We will use [passport-local](https://github.com/jaredhanson/passport-local) for "account password login" as an example:
+
+### Installation
+
+```bash
+$ npm i --save passport-local
+```
+
+### Configuration
+
+```js
+// app.js
+const LocalStrategy = require('passport-local').Strategy;
+
+module.exports = app => {
+  // Mount strategy
+  app.passport.use(new LocalStrategy({
+    passReqToCallback: true,
+  }, (req, username, password, done) => {
+    // format user
+    const user = {
+      provider: 'local',
+      username,
+      password,
+    };
+    debug('%s %s get user: %j', req.method, req.url, user);
+    app.passport.doVerify(req, user, done);
+  }));
+
+  // Process user information
+  app.passport.verify(async (ctx, user) => {});
+  app.passport.serializeUser(async (ctx, user) => {});
+  app.passport.deserializeUser(async (ctx, user) => {});
+};
+```
+
+### Mounting Routes
+
+```js
+// app/router.js
+module.exports = app => {
+  const { router, controller } = app;
+  router.get('/', controller.home.index);
+
+  // Callback page after successful authentication
+  router.get('/authCallback', controller.home.authCallback);
+
+  // Render login page, user inputs account password
+  router.get('/login', controller.home.login);
+  // Login verification
+  router.post('/login', app.passport.authenticate('local', { successRedirect: '/authCallback' }));
+};
+```
+
+## How to develop an egg-passport plugin
+
+In the previous section, we learned how to use a Passport middleware in the framework. We can further encapsulate it as a plugin and give back to the community.
+
+**initialization:**
+
+```bash
+$ egg-init --type=plugin egg-passport-local
+```
+
+**Configure dependencies in `package.json`:**
+
+```json
+{
+  "name": "egg-passport-local",
+  "version": "1.0.0",
+  "eggPlugin": {
+    "name": "passportLocal",
+    "dependencies": ["passport"]
+  },
+  "dependencies": {
+    "passport-local": "^1.0.0"
+  }
+}
+```
+
+**Configuration:**
+
+```js
+// {plugin_root}/config/config.default.js
+// https://github.com/jaredhanson/passport-local
+exports.passportLocal = {
+};
+```
+
+Note: [egg-passport](https://github.com/eggjs/egg-passport) standardizes the configuration fields, which are unified as `key` and `secret`, so if the corresponding Passport middleware attribute names are inconsistent, the developer should do the conversion.
+
+**Register the passport middleware:**
+
+```js
+// {plugin_root}/app.js
+const LocalStrategy = require('passport-local').Strategy;
+
+module.exports = app => {
+  const config = app.config.passportLocal;
+  config.passReqToCallback = true;
+
+  app.passport.use(new LocalStrategy(config, (req, username, password, done) => {
+    // Cleans up the data returned by the Passport plugin and returns the User object
+    const user = {
+      provider: 'local',
+      username,
+      password,
+    };
+    // This does not process application-level logic and passes it to app.passport.verify for unified processing.
+    app.passport.doVerify(req, user, done);
+  }));
+};
+```
+
+[passport]: http://www.passportjs.org/
+[egg-passport]: https://github.com/eggjs/egg-passport
+[passport-local]: https://github.com/jaredhanson/passport-local
+[eggjs/examples/passport]: https://github.com/eggjs/examples/tree/master/passport

docs/source/zh-cn/tutorials/passport.md

@@ -37,12 +37,12 @@ $ npm i --save egg-passport-github
 
 ```js
 // config/plugin.js
-exports.passport = {
+module.exports.passport = {
   enable: true,
   package: 'egg-passport',
 };
 
-exports.passportGithub = {
+module.exports.passportGithub = {
   enable: true,
   package: 'egg-passport-github',
 };