如何在cakephp 2.4中实现JsonP [英] how to implement JsonP in cakephp 2.4
问题描述
我刚刚升级到cakephp 2.4.1,因为它现在支持JsonP。我以前在我的Ajax跨域代码中遇到丢失的回调错误。但是,文档中没有提到实现此操作所需的任何其他步骤,因此我本以为应该这样做,但是却收到与以前相同的错误。
I have just upgraded to cakephp 2.4.1 as it now supports JsonP. I was previously getting an a missing callback error in my ajax cross domain code. However the documentation does not mention any additional steps need to implement this so I would have thought that it should wold but i get the same error as before.
我是否需要一个
我的控制器
public function api($mem_id = null) {
$options = array(
'fields' => array('Member.total_points'),
'conditions' => array('Member.member_no' => $mem_id),
'recursive' => -1
);
$members = $this->Member->find('first', $options);
$this->set(array(
'member' => $members,
'_serialize' => array('member')
));
}
}
ajax代码
$('document').ready(function() {
$.ajax({
url: 'http://mydomain.com/loyalty/members/api/5749.json',
dataType: 'jsonp',
success: function(response) {
console.log(resonse);
},
error: function(jqXHR, textStatus, errorThrown) {
console.log(errorThrown);
}
});
});
推荐答案
它也应该在较旧的Cake版本上也能正常工作,就像我在另一个问题中所描述的那样;)
It should have worked fine with the older Cake version too, just as I've described in your other question ;)
无论如何,请查看 /lib/Cake/View/JsonView.php
或 API文档中。您必须定义一个名为 _jsonp
的视图变量,该变量可以是一个字符串,它指定保存回调函数名称的查询变量的名称,或者是 true
表示正在查找名称为 callback
的默认查询变量。
Anyways, look at the code in /lib/Cake/View/JsonView.php
or in the API documentation. You have to define a view var named _jsonp
, which can be either a string specifying the name of the query variable that holds the callback function name, or true
which means a default query variable with the name callback
is being looked up.
因此,由于jQuery默认使用查询变量名 callback
,因此为 _jsonp定义了
应该这样做: true
So as jQuery uses a query variable name of callback
by default, defining true
for _jsonp
should do it:
$this->set(array(
'member' => $members,
'_serialize' => array('member'),
'_jsonp' => true
));
如果没有名为 callback
的查询变量在请求URL中找到(即?callback =任何内容
),您将收到常规的JSON响应。
In case no query variable named callback
could be found in the request URL (ie ?callback=whatever
), you'd receive a regular JSON response instead.
另请参见
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