ThinkPHP 5 AJAX跨域请求头设置实现过程解析

<?php
/**
 * Created by PhpStorm.
 * User: LiuYang
 * Date: 2017/3/9
 * Time: 19:37
 */

namespace app\common\behavior;

use think\Exception;
use think\Response;

class CronRun
{
  public function run(&$dispatch){
    $host_name = isset($_SERVER['HTTP_ORIGIN']) ? $_SERVER['HTTP_ORIGIN'] : "*";
    $headers = [
      "Access-Control-Allow-Origin" => $host_name,
      "Access-Control-Allow-Credentials" => 'true',
      "Access-Control-Allow-Headers" => "x-token,x-uid,x-token-check,x-requested-with,content-type,Host"
    ];
    if($dispatch instanceof Response) {
      $dispatch->header($headers);
    } else if($_SERVER['REQUEST_METHOD'] === 'OPTIONS') {
      $dispatch['type'] = 'response';
      $response = new Response('', 200, $headers);
      $dispatch['response'] = $response;
    }
  }
}

<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

// 应用行为扩展定义文件
return [
  // 应用初始化
  'app_init'   => [],
  // 应用开始
  'app_begin'  => [
    'app\\common\\behavior\\CronRun'
  ],
  // 模块初始化
  'module_init' => [],
  // 操作开始执行
  'action_begin' => [],
  // 视图内容过滤
  'view_filter' => [],
  // 日志写入
  'log_write'  => [],
  // 应用结束
  'app_end'   => [
    'app\\common\\behavior\\CronRun'
  ],
];