Axios 请求已被阻止，请求的资源上不存在“Access-Control-Allow-Origin”标头

Question

我正在尝试向 ERP API 发出请求，并收到以下响应：

从源“http://connector.test”访问“http://ip:8082/auth”处的 XMLHttpRequest 已被 CORS 策略阻止：对预检请求的响应未通过访问控制检查：无“访问控制” -Allow-Origin'标头存在于请求的资源上。

虽然在我的请求中有一个标头 Access-Control-Allow-Origin：

        getAuth() {
            axios.post('http://'+this.ip + '/auth/', {
                headers: {
                    "Content-Type": "application/json",
                    "Cookie": this.sessionid,
                    "Access-Control-Allow-Origin": "*",
                    "Access-Control-Allow-Methods": "GET, POST, PATCH, PUT, DELETE, OPTIONS",
                    "Access-Control-Allow-Headers": "Origin, Content-Type, X-Auth-Token, Authorization, Accept,charset,boundary,Content-Length"
                }, 
                data: {
                    username: this.username, 
                    password: this.password
                }
            }).then(response => {
                this.getItems();
            })
        },

Cors.php

'paths' => ['*'],

'allowed_methods' => ['*'],

'allowed_origins' => ['*'],

'allowed_origins_patterns' => [],

'allowed_headers' => ['*'],

'exposed_headers' => [],

'max_age' => 0,

'supports_credentials' => true,

js/bootstrap.js

window.axios.defaults.headers.common['X-Requested-With'] = 'XMLHttpRequest';
window.axios.defaults.headers.common['Access-Control-Allow-Origin'] = '*';
window.axios.defaults.headers.common['Access-Control-Allow-Methods'] = 'POST, GET, OPTIONS, PUT, DELETE';

添加了我自己的中间件

中间件/cors.php

  return $next($request)
        ->header('Access-Control-Allow-Origin', '*')
        ->header('Access-Control-Allow-Methods', 'GET, POST, PUT, DELETE, 
          OPTIONS');

将其添加到 kernel.php $routeMiddleware 然后 web.php

Route::get('/', [App\Http\Controllers\MainController::class, 'index'])->middleware(Cors::class);

请求标头

Request URL: http://ip:8082/auth
Referrer Policy: strict-origin-when-cross-origin
Provisional headers are shown
Accept: application/json, text/plain, */*
Access-Control-Allow-Methods: POST, GET, OPTIONS, PUT, DELETE
Access-Control-Allow-Origin: *
Content-Type: application/json;charset=UTF-8
Referer: http://connector.test/
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36
X-Requested-With: XMLHttpRequest

使用 PHP Curl 在后端执行请求效果很好，但我想让它在前端使用 Vue 工作。

Answer 1

Web 浏览器具有安全功能，可以阻止对网站的大规模 DOS 攻击。简而言之，任何在 X 上运行的代码都无法请求 Y 上的资源，除非 Y 明确允许 X 请求它。这是通过 Access-Control-Allow-Origins 标头完成的。

您必须将其添加到您的网络服务器或后端代码中。