Laravel使用JWT来创建用户认证API

摘要：本文来自原文链接欢迎作客我们的学习群这个例子将引导你在中使用来创建用户登录和注册的。是的简称，可以帮助我们创建用户认证，以此连接前后端。

本文来自pilishen.com----原文链接; 欢迎作客我们的php&Laravel学习群：109256050

这个例子将引导你在laravel中使用JWT来创建用户登录和注册的API。JWT是Json Web Token的简称，可以帮助我们创建用户认证，以此连接前后端。

composer require tymon/jwt-auth

修改config/app.php

"providers" => [
    ....
    "TymonJWTAuthProvidersJWTAuthServiceProvider",
],
"aliases" => [
    ....
    "JWTAuth" => "TymonJWTAuthFacadesJWTAuth"
],

发布JWT的配置文件，用以修改token过期时间等：

php artisan vendor:publish --provider="TymonJWTAuthProvidersJWTAuthServiceProvider"

生成jwt的秘钥：

php artisan jwt:generate

在app/Http/routes.php中（示例用的是laravel 5.2，你也可以放到后期版本的api.php中）

Route::group(["middleware" => ["api","cors"],"prefix" => "api"], function () {
    Route::post("register", "APIController@register");
    Route::post("login", "APIController@login");
    Route::group(["middleware" => "jwt-auth"], function () {
        Route::post("get_user_details", "APIController@get_user_details");
    });
});

这里的cors中间件，这是用来解决跨域请求默认被拦截的问题，如果不加就会有下面这个常见报错：

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at //test.com/api/register. (Reason: CORS header "Access-Control-Allow-Origin" missing).

所以：

php artisan make:middleware CORS

然后在app/Http/Middleware/CORS.php中：

namespace AppHttpMiddleware;
use Closure;
class CORS
{
    public function handle($request, Closure $next)
    {
        header("Access-Control-Allow-Origin: *");
        
        $headers = [
            "Access-Control-Allow-Methods"=> "POST, GET, OPTIONS, PUT, DELETE",
            "Access-Control-Allow-Headers"=> "Content-Type, X-Auth-Token, Origin"
        ];
        if($request->getMethod() == "OPTIONS") {
            return Response::make("OK", 200, $headers);
        }
        
        $response = $next($request);
        foreach($headers as $key => $value)
            $response->header($key, $value);
        return $response;
    }
}

注册中间件app/Http/Kernel.php：

namespace AppHttp;
use IlluminateFoundationHttpKernel as HttpKernel;
class Kernel extends HttpKernel
{
    ...
    ...
    protected $routeMiddleware = [
        ...
        "cors" => AppHttpMiddlewareCORS::class,
    ];
}

php artisan make:middleware authJWT

然后app/Http/Middleware/authJWT.php

namespace AppHttpMiddleware;
use Closure;
use JWTAuth;
use Exception;
class authJWT
{
    public function handle($request, Closure $next)
    {
        try {
            $user = JWTAuth::toUser($request->input("token"));
        } catch (Exception $e) {
            if ($e instanceof TymonJWTAuthExceptionsTokenInvalidException){
                return response()->json(["error"=>"Token is Invalid"]);
            }else if ($e instanceof TymonJWTAuthExceptionsTokenExpiredException){
                return response()->json(["error"=>"Token is Expired"]);
            }else{
                return response()->json(["error"=>"Something is wrong"]);
            }
        }
        return $next($request);
    }
}

然后app/Http/Kernel.php

namespace AppHttp;
use IlluminateFoundationHttpKernel as HttpKernel;
class Kernel extends HttpKernel
{
    ...
    ...
    protected $routeMiddleware = [
        ...
        "jwt-auth" => AppHttpMiddlewareauthJWT::class,
    ];
}

在app/Http/Controllers/APIController.php中：

namespace AppHttpControllers;
use IlluminateHttpRequest;
use AppUser;
use Hash;
use JWTAuth;
class APIController extends Controller
{
    
    public function register(Request $request)
    {        
        $input = $request->all();
        $input["password"] = Hash::make($input["password"]);
        User::create($input);
        return response()->json(["result"=>true]);
    }
    
    public function login(Request $request)
    {
        $input = $request->all();
        if (!$token = JWTAuth::attempt($input)) {
            return response()->json(["result" => "wrong email or password."]);
        }
            return response()->json(["result" => $token]);
    }
    
    public function get_user_details(Request $request)
    {
        $input = $request->all();
        $user = JWTAuth::toUser($input["token"]);
        return response()->json(["result" => $user]);
    }
    
}

这里你完全可以使用postman或者rest client等其他工具。

测试Register API：

$.ajax({
    url: "//learnl52.hd/api/register",
    dataType: "json",
    type: "POST",
    data: {"name":"HD","email":"test@gmail.com","password":"123456"},
    success: function (data) {
        alert("user created successfully")
    }
});

测试Login API：

$.ajax({
    url: "//learnl52.hd/api/login",
    dataType: "json",
    type: "POST",
    data: {"email":"test@gmail.com","password":"123456"},
    success: function (data) {
        alert(data.result)
    }
});

测试User Details API（这里的token是你Login api返回的token）

$.ajax({
    url: "//learnl52.hd/api/get_user_details",
    dataType: "json",
    type: "POST",
    data: {"token":your toke here},
    success: function (data) {
        console.log(data)
    }
});