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Ajax Access-Control-Allow-Origin

2024-12-18 来源:华佗小知识

在被请求的Response header中加入

// 指定允许其他域名访问  
header('Access-Control-Allow-Origin:*');  
// 响应类型  
header('Access-Control-Allow-Methods:POST');  
// 响应头设置  
header('Access-Control-Allow-Headers:x-requested-with,content-type');  

就可以实现ajax POST跨域访问了。

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
 <head>
  <meta http-equiv="content-type" content="text/html;charset=utf-8">
  <title> AJAX跨域测试 </title>
  <script 
 </head>

 <body>
    <div id="show"></div>
    <script type="text/javascript">
    $.post("./ajax.php",{status:"sucess",msg:"AJAX"})
      .done(function(data){
        document.getElementById("show").innerHTML = data.msg + '   <B>' + data.status;
      });
    </script>
 </body>
</html>

$data = [
    'status' => isset($_POST['status'])? $_POST['status'] : '',
    'msg' => isset($_POST['msg'])? $_POST['msg'] : ''
];

header('content-type:application:json;charset=utf8');  
header('Access-Control-Allow-Origin:*');  
header('Access-Control-Allow-Methods:POST');  
header('Access-Control-Allow-Headers:x-requested-with,content-type');  
  
echo json_encode($data);  

Access-Control-Allow-Origin:* 表示允许任何域名跨域访问

ajax.php 修改为

<?php

$data = [
    'status' => isset($_POST['status'])? $_POST['status'] : '',
    'msg' => isset($_POST['msg'])? $_POST['msg'] : ''
];

header('content-type:application:json;charset=utf8');
$origin = isset($_SERVER['HTTP_ORIGIN'])? $_SERVER['HTTP_ORIGIN'] : '';
$allow_origin = array(
    
    
);

if(in_array($origin, $allow_origin)){
    header('Access-Control-Allow-Origin:'.$origin);
    header('Access-Control-Allow-Methods:POST');
    header('Access-Control-Allow-Headers:x-requested-with,content-type');
    echo json_encode($data);
}else{
    $rs = [
        'status'=>'error',
        'msg'=>'Cross domain is not allowed'
    ];
    echo json_encode($rs);
}

?>

效果图如下:


这里写图片描述

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