本ajax跨域訪問，可以使用jsonp方法或設定Access-Control-Allow-Origin實現，關於設定Access-Control-Allow-Origin實現跨域訪問可以參考之前我寫的文章《ajax 設定Access-Control -Allow-Origin實現跨域訪問》文主要介紹了Ajax跨域訪問Cookie丟失問題的解決方法,需要的朋友可以參考下，希望能幫助到大家。
1.ajax跨網域存取,cookie遺失
首先建立兩個測試網域
a.fdipzone.com 作為客戶端網域
b. fdipzone.com 作為服務端網域名稱
測試程式碼
setcookie.PHP 用於設定服務端cookie
<?php setcookie('data', time(), time()+3600); ?>
server.php 用於被客戶端請求
<?php
$name = isset($_POST['name'])? $_POST['name'] : '';
$ret = array(
'success' => true,
'name' => $name,
'cookie' => isset($_COOKIE['data'])? $_COOKIE['data'] : ''
);
// 指定允许其他域名访问
header('Access-Control-Allow-Origin:http://a.fdipzone.com');
// 响应类型
header('Access-Control-Allow-Methods:POST');
// 响应头设置
header('Access-Control-Allow-Headers:x-requested-with,content-type');
header('content-type:application/json');
echo json_encode($ret);
?>test.html 用戶端請求頁面
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<script src="//code.jquery.com/jquery-1.11.0.min.js"></script>
<title> ajax 跨域访问cookie丢失的解决方法 </title>
</head>
<body>
<script type="text/javascript">
$(function(){
$.ajax({
url: 'http://b.fdipzone.com/server.php', // 跨域
dataType: 'json',
type: 'post',
data: {'name':'fdipzone'},
success:function(ret){
if(ret['success']==true){
alert('cookie:' + ret['cookie']);
}
}
});
})
</script>
</body>
</html>首先執行http://b.fdipzone.com/setcookie.php, 建立服務端cookie。
然後執行http://a.fdipzone.com/test.html
輸出
{"success":true,"name":"fdipzone","cookie":""}取得cookie失敗。
2.解決方法
客戶端
#請求時將withCredentials屬性設為true
使可以指定某個請求應該發送憑證。如果伺服器接收有憑證的請求，會用下面的HTTP頭部來回應。
服務端
設定header
header("Access-Control-Allow-Credentials:true");允許請求帶有驗證訊息
test.html 修改如下
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8">
<script src="//code.jquery.com/jquery-1.11.0.min.js"></script>
<title> ajax 跨域访问cookie丢失的解决方法 </title>
</head>
<body>
<script type="text/javascript">
$(function(){
$.ajax({
url: 'http://b.fdipzone.com/server.php', // 跨域
xhrFields:{withCredentials: true}, // 发送凭据
dataType: 'json',
type: 'post',
data: {'name':'fdipzone'},
success:function(ret){
if(ret['success']==true){
alert('cookie:' + ret['cookie']);
}
}
});
})
</script>
</body>
</html>server.php 修改如下
<?php
$name = isset($_POST['name'])? $_POST['name'] : '';
$ret = array(
'success' => true,
'name' => $name,
'cookie' => isset($_COOKIE['data'])? $_COOKIE['data'] : ''
);
// 指定允许其他域名访问
header('Access-Control-Allow-Origin:http://a.fdipzone.com');
// 响应类型
header('Access-Control-Allow-Methods:POST');
// 响应头设置
header('Access-Control-Allow-Headers:x-requested-with,content-type');
// 是否允许请求带有验证信息
header('Access-Control-Allow-Credentials:true');
header('content-type:application/json');
echo json_encode($ret);
?>按先前步驟執行，請求返回
{"success":true,"name":"fdipzone","cookie":"1484558863"}#取得cookie成功
3.注意事項
##1.如果客戶端設定了withCredentials屬性設定為true，而服務端沒有設定Access-Control-Allow-Credentials:true，請求時會傳回錯誤。XMLHttpRequest cannot load http://b.fdipzone.com/server.php. Credentials flag is 'true', but the 'Access-Control-Allow-Credentials' header is ''. It must be 'true' to allow credentials. Origin 'http://a.fdipzone.com' is therefore not allowed access.
XMLHttpRequest cannot load http://b.fdipzone.com/server.php. A wildcard '*' cannot be used in the 'Access-Control-Allow-Origin' heade
var xhr = new XMLHttpRequest();
xhr.open("POST", "http://xxxx.com/demo/b/index.php", true);
xhr.withCredentials = true; //支持跨域发送cookies
xhr.send();
$.ajax({
type: "POST",
url: "http://xxx.com/api/test",
dataType: 'jsonp',
xhrFields: {
withCredentials: true
},
crossDomain: true,
success:function(){
},
error:function(){
}
})header("Access-Control-Allow-Credentials: true");
header("Access-Control-Allow-Origin: http://www.xxx.com");以上是Ajax跨網域存取Cookie遺失問題的解決方法_AJAX相關的詳細內容。更多資訊請關注PHP中文網其他相關文章！
