[英]Check for Ajax request in CodeIgniter
我在PHP腳本中,我想檢查請求是否是Ajax請求。 (基本上不允許直接腳本訪問,而不是Ajax調用。)
所以,我在主index.php
文件中的某個地方定義了IS_AJAX
:
define('IS_AJAX',
isset($_SERVER['HTTP_X_REQUESTED_WITH']) &&
strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest');
然后在我的腳本頂部檢查它:
if (!IS_AJAX) exit('No direct script access allowed');
由於我是CodeIgniter的新手,我想知道:
您可以使用輸入類中的$this->input->is_ajax_request()
:
if (!$this->input->is_ajax_request()) {
exit('No direct script access allowed');
}
如果使用鈎子(CI docs),則if (!$this->input->is_ajax_request())
為每個AJAX方法添加if (!$this->input->is_ajax_request())
) 。 這是基於Jorge的解決方案 ,稍作改進:
config/config.php
通過更改默認值(從FALSE
)啟用CI掛鈎:
$config['enable_hooks'] = TRUE;
config/hooks.php
最后添加以下內容:
$hook['post_controller_constructor'] = array(
'class' => 'Ajax_only',
'function' => 'show_404_on_illegal_ajax',
'filename' => 'Ajax_only.php',
'filepath' => 'hooks'
);
post_controller_constructor
:在實例化控制器之后立即調用 ,但在任何方法調用發生之前調用
config/ajax_methods.php
創建一個新的配置文件,其中包含只應在發出AJAX請求時調用的所有控制器和方法:
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
/*
|--------------------------------------------------------------------------
| References to all AJAX controllers' methods or the controller itself
|--------------------------------------------------------------------------
|
| Based on Jorge's solution: https://stackoverflow.com/a/43484330/6225838
| Key: controller name
| Possible values:
| - array: method name as key and boolean as value (TRUE => IS_AJAX)
| - boolean: TRUE if all the controller's methods are for AJAX requests
|
*/
$config['welcome'] = [
'index' => FALSE, // or 0 -> this line can be removed (just for reference)
'ajax_request_method_1' => TRUE, // or 1
'ajax_request_method_2' => TRUE, // or 1
];
$config['ajax_troller'] = TRUE;
hooks/Ajax_only.php
創建鈎子本身,它檢測當前控制器和/或其方法是否存在於上面的新配置文件中。 如果是這樣,當當前請求不是AJAX並且方法/控制器在配置中具有真值時,它顯示404默認頁面:
<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Ajax_only {
public function __construct()
{
$this->CI = &get_instance();
$this->CI->config->load('ajax_methods');
}
public function show_404_on_illegal_ajax()
{
$fetched_troller_val = $this->CI->config->item(
$this->CI->router->fetch_class()
);
$fetched_method = $this->CI->router->fetch_method();
$is_ajax_method = is_array($fetched_troller_val) &&
// verify if the method's name is present
isset($fetched_troller_val[$fetched_method]) &&
// verify if the value is truthy
$fetched_troller_val[$fetched_method];
// if the controller is not in the config file then
// config->item() returned NULL
if($fetched_troller_val !== NULL &&
$this->CI->input->is_ajax_request() === FALSE &&
($fetched_troller_val === TRUE || $is_ajax_method)
) {
show_404();
}
}
}
如果要自定義來自codeigniter應用程序的請求,請嘗試以下操作:您必須在application / hooks文件夾中創建名為Ajax_only.php的掛鈎
class Ajax_only {
private $_controllers = [];
private $CI;
public function __construct() {
$this->CI =& get_instance();
}
public function eval_request() {
$controller = $this->CI->router->fetch_class();
$method = $this->CI->router->fetch_method();
if ( array_key_exists( $controller, $this->_controllers ) && $this->CI->input->is_ajax_request() === FALSE ) {
if ( ( $this->_controllers[ $controller ] === TRUE || ( is_array( $this->_controllers[ $controller ] ) && array_key_exists( $method, $this->_controllers[ $controller ] ) && $this->_controllers[ $controller ][ $method ] === TRUE ) ) ) {
show_404();
}
}
}
}
/*Examples
* $_controllers = [
* 'my_controller_name' => TRUE //all methods must be ajax
* 'my_controller_name => [
* 'method_name' => TRUE //only the selected methods must be ajax
* ]
* ]
*/
並配置您的application / config / hooks.php文件
$hook['post_controller_constructor'] = array(
'class' => 'Ajax_only',
'function' => 'eval_request',
'filename' => 'Ajax_only.php',
'filepath' => 'hooks'
);
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.