php - ci 休息服务器允许 CORS 不起作用

Question

嘿伙计们，我有大学的任务来制作电子学习休息服务器，当我将它部署到 VPS 时，它收到一个错误消息：

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://IP_VPS/elearning/auth/login. (Reason: CORS request did not succeed).

我正在使用 chriskacerguis ci 库，控制器是AUTH.php延伸到Token.php延伸到REST_Controller.php。

应用程序/控制器/api/Token.php

<?php
// load library rest server
use Restserver\Libraries\REST_Controller;
require APPPATH . 'libraries/REST_Controller.php';
require APPPATH . 'libraries/Format.php';

// load library rest server
use \Firebase\JWT\JWT;
require APPPATH . 'libraries/JWT.php';
require APPPATH . 'libraries/BeforeValidException.php';
require APPPATH . 'libraries/ExpiredException.php';
require APPPATH . 'libraries/SignatureInvalidException.php';

defined('BASEPATH') OR exit('No direct script access allowed');

class Token extends REST_Controller {

  private $_secretkey = 'elearning';
  private $_token;

  public function __construct(){
    // ALLOW CORS
    header('Access-Control-Allow-Origin: *');
    if($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
        header('Access-Control-Allow-Methods: GET, PUT, POST, DELETE, OPTIONS');
        header('Access-Control-Allow-Headers: Content-Type');
        exit;
    }
    parent::__construct();
    $this->load->model('m_users', 'user');
  }

  public function getToken() {
    return $this->_token;
  }

  public function generateToken($user){
  }

  public function authToken($admin_access = null){
  }

  public function decodeToken($token) {
  }
}

?>

在application/controllers/Auth.php 中，我没有将标头 CORS 放入构造函数，因为我之前已经将其放入，但仍然无法正常工作。

客户端（我将其上传到 github.io）

  let xhr = new XMLHttpRequest();
  xhr.open('POST', 'https://IP_VPS/elearning/auth/login');
  xhr.onreadystatechange = function() {
    if(this.readyState == 4 && this.status == 200) {
      console.log(this.response);
    }
  }
  xhr.send('email='+email.value+'&password='+password.value);

/etc/nginx/sites-available/default

location / {
    # First attempt to serve request as file, then
    # as directory, then fall back to displaying a 404.
    #try_files $uri $uri/ =404;

    if ($request_method = 'OPTIONS') {
      add_header 'Access-Control-Allow-Origin' '*';
      add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
      add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Con$
      add_header 'Access-Control-Max-Age' 1728000;
      add_header 'Content-Type' 'text/plain; charset=utf-8';
      add_header 'Content-Length' 0;
        return 204;
     }
    if ($request_method = 'POST') {
      add_header 'Access-Control-Allow-Origin' '*';
      add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
      add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Con$
      add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range';
    }
    if ($request_method = 'GET') {
      add_header 'Access-Control-Allow-Origin' '*';
      add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
      add_header 'Access-Control-Allow-Headers' 'DNT,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Con$
      add_header 'Access-Control-Expose-Headers' 'Content-Length,Content-Range';
    }
}

# pass PHP scripts to FastCGI server
location ~ \.php$ {
    include snippets/fastcgi-php.conf;
    # With php-fpm (or other unix sockets):
    fastcgi_pass unix:/var/run/php/php7.2-fpm.sock;
    # With php-cgi (or other tcp sockets):
    #fastcgi_pass 127.0.0.1:9000;
}

# codeigniter elearning
# i created it by myself
location /elearning {
    try_files $uri $uri/ /elearning/index.php;
}

我的控制器/配置有什么问题吗？我在构建休息服务器并部署它时超级新。对不起，如果这个问题太愚蠢了，我真的很困惑我现在应该做什么。我希望我的问题不会被关闭。还是谢谢各位

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