GraphQL 配合 JWT 使用 —— Laravel RSS (二)

咱們瞭解了 jwt 和 GraphQL 的使用，那接下來看看他們如何結合使用。

小試牛刀

建立 myProfile query

<?php
/** * User: yemeishu * Date: 2018/4/21 * Time: 上午8:55 */

namespace App\GraphQL\Query;

use App\User;
use Rebing\GraphQL\Support\Facades\GraphQL;
use Rebing\GraphQL\Support\Query;
use Rebing\GraphQL\Support\SelectFields;
use Tymon\JWTAuth\Facades\JWTAuth;

class MyProfileQuery extends Query {
    private $auth;

    protected $attributes = [
        'name' => 'My Profile Query',
        'description' => 'My Profile Information'
    ];

    public function authorize(array $args) {
        try {
            $this->auth = JWTAuth::parseToken()->authenticate();
        } catch (\Exception $e) {
            $this->auth = null;
        }

        return (boolean) $this->auth;
    }

    public function type() {
        return GraphQL::type('myprofile');
    }

    public function resolve($root, $args, SelectFields $fields) {
        $user = User::with(array_keys($fields->getRelations()))
            ->where('id', $this->auth->id)
            ->select($fields->getSelect())->first();

        return $user;
    }

}
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建立 Type

<?php
/** * User: yemeishu * Date: 2018/4/21 * Time: 下午3:59 */

namespace App\GraphQL\Type;

use App\User;
use GraphQL\Type\Definition\Type;
use Rebing\GraphQL\Support\Facades\GraphQL;
use Rebing\GraphQL\Support\Type as GraphQLType;

class MyProfileType extends GraphQLType {
    protected $attributes = [
        'name' => 'myprofile',
        'description' => 'A type',
        'model' => User::class, // define model for users type
    ];

    // define field of type
    public function fields() {
        return [
            'id' => [
                'type' => Type::nonNull(Type::int()),
                'description' => 'The id of the user'
            ],
            'email' => [
                'type' => Type::string(),
                'description' => 'The email of user'
            ],
            'name' => [
                'type' => Type::string(),
                'description' => 'The name of the user'
            ]
        ];
    }

    protected function resolveEmailField($root, $args) {
        return strtolower($root->email);
    }
}
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註冊 GraphQL config

固然要獲取 jwt token，須要有一個 login 方法：

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Tymon\JWTAuth\Exceptions\JWTException;
use Tymon\JWTAuth\JWTAuth;

class AuthenticateController extends Controller {
    private $jwt;

    public function __construct(JWTAuth $jwt) {
        $this->jwt = $jwt;
    }

    public function authenticate(Request $request) {
        // grab credentials from the request
        $credentials = $request->only('email', 'password');
        try {
            // attempt to verify the credentials and create a token for the user
            if (! $token = $this->jwt->attempt($credentials)) {
                return response()->json(['error' => 'invalid_credentials'], 401);
            }
        } catch (JWTException $e) {
            // something went wrong whilst attempting to encode the token
            return response()->json(['error' => 'could_not_create_token'], 500);
        }
        // all good so return the token
        return response()->json(compact('token'));
    }
}
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註冊路由：

Route::post('/login', 'AuthenticateController@authenticate');
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先利用 email 和 password 得到 token 值：

而後利用 token 獲取用戶信息：

獲取 Xpath List

在 RSS 系統中，咱們也但願給每一個用戶建立本身的 RSS Feeds。因此先修改 xpath 的歸屬。

php artisan make:migration add_user_id_to_xpaths_table --table=xpaths
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public function up() {
    Schema::table('xpaths', function (Blueprint $table) {
        $table->integer('user_id')->unsigned();
    });
}
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admin 添加 xpath 歸屬操做

在 XpathController 的 form 函數增長 user_id 的選擇框：

$form->select('user_id')->options(function ($id) {
    $user = User::find($id);
    if ($user) {
        return [$user->id => $user->name];
    }
})->ajax('/admin/users');
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添加 admin/users route 和 controller

<?php

namespace App\Admin\Controllers;

use App\User;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;

class UserController extends Controller {

    public function users(Request $request) {
        $q = $request->get('q');
        return User::where('name', 'like', "%$q%")
            ->paginate(null, ['id', 'name as text']);
    }
}
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這樣就能夠根據輸入的 user name 來選擇這個 xpath 的歸屬。

讓 xpath 列表顯示 user_id 值.

首先增長 一對一 關聯：

<?php

namespace App;

use Illuminate\Database\Eloquent\Model;

class Xpath extends Model {
    public function user() {
        return $this->belongsTo(User::class);
    }
}
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再在 XpathController 的 grid() 直接增長 user's name:

$grid->column('user.name', '歸屬人');
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顯示效果：

利用 GraphQL 獲取 Xpath 列表

1. 建立 Query

<?php
/** * User: yemeishu * Date: 2018/4/21 * Time: 下午11:16 */

namespace App\GraphQL\Query;

use App\Xpath;
use GraphQL\Type\Definition\Type;
use Rebing\GraphQL\Support\Facades\GraphQL;
use Rebing\GraphQL\Support\Query;
use Rebing\GraphQL\Support\SelectFields;
use Tymon\JWTAuth\Facades\JWTAuth;

class MyXpathsQuery extends Query {
    private $auth;

    protected $attributes = [
        'name' => 'My Xpaths Query',
        'description' => 'My Xpaths Information'
    ];

    public function authorize(array $args) {
        try {
            $this->auth = JWTAuth::parseToken()->authenticate();
        } catch (\Exception $e) {
            $this->auth = null;
        }

        return (boolean) $this->auth;
    }

    public function type() {
        return Type::listOf(GraphQL::type('myxpath'));
    }

    public function resolve($root, $args, SelectFields $fields) {
        $xpaths = Xpath::with(array_keys($fields->getRelations()))
            ->where('user_id', $this->auth->id)
            ->select($fields->getSelect())
            ->get();

        return $xpaths;
    }
}
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利用 jwt token 獲取 user's id，而後再查詢屬於該用戶的 xpath 列表

2. 定義返回的 Type

<?php
/** * User: yemeishu * Date: 2018/4/21 * Time: 下午3:59 */

namespace App\GraphQL\Type;

use App\User;
use App\Xpath;
use GraphQL\Type\Definition\Type;
use Rebing\GraphQL\Support\Facades\GraphQL;
use Rebing\GraphQL\Support\Type as GraphQLType;

class MyXpathType extends GraphQLType {
   protected $attributes = [
       'name' => 'myxpath',
       'description' => 'A type',
       'model' => Xpath::class, // define model for xpath type
   ];

   // define field of type
   public function fields() {
       return [
           'id' => [
               'type' => Type::nonNull(Type::int()),
               'description' => 'The id of the user'
           ],
           'url' => [
               'type' => Type::string(),
               'description' => 'The url of xpath'
           ],
           'urldesc' => [
               'type' => Type::string(),
               'description' => 'The desc of the xpath'
           ]
       ];
   }
}
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3. 註冊 GraphQL config

4. 測試

結果天然顯而易見：

總結

這是繼續上一篇《花 2 小時擼一個 RSS 生成器》mp.weixin.qq.com/s/mRjoKgkq1…，主要是想利用 jwt 和 GraphQL 做爲接口層，爲以後的前端開發，提供數據基礎。

主要參考：

• 學習 Lumen 用戶認證 (二) —— 使用 jwt-auth 插件 mp.weixin.qq.com/s/k1v-mji7Y…
• 推薦一個 Laravel admin 後臺管理插件 mp.weixin.qq.com/s/PnAj0j2X3…
• 結合 Laravel 初步學習 GraphQL mp.weixin.qq.com/s/Uvv4X9hXT…

源代碼

github.com/fanly/lrss

「未完待續」