摘要：本文來自原文鏈接歡迎作客我們的學習群這個例子將引導你在中使用來創建用戶登錄和注冊的。是的簡稱，可以幫助我們創建用戶認證，以此連接前后端。

本文來自pilishen.com----原文鏈接; 歡迎作客我們的php&Laravel學習群：109256050

這個例子將引導你在laravel中使用JWT來創建用戶登錄和注冊的API。JWT是Json Web Token的簡稱，可以幫助我們創建用戶認證，以此連接前后端。

composer require tymon/jwt-auth

修改config/app.php

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

發布JWT的配置文件，用以修改token過期時間等：

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

生成jwt的秘鑰：

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");
    });
});

這里的cors中間件，這是用來解決跨域請求默認被攔截的問題，如果不加就會有下面這個常見報錯：

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;
    }
}

注冊中間件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]);
    }
    
}

這里你完全可以使用postman或者rest client等其他工具。

測試Register API：

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

測試Login API：

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

測試User Details API（這里的token是你Login api返回的token）

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