解决[origin 'http://xxx.xxx.com:xxxx' has been blocked by CORS policy: The request client is n

Posted 2021-10-18 挖穿地球

跨域报错解决方案Access to XMLHttpRequest at ‘http://xxx.com/xxx‘ from origin ‘null‘ has been blocked by

错误背景描述：

在使用ajax调用api接口的时候：发生错误如下
Access to XMLHttpRequest at ‘http://xxxx.com/xxx’ from origin ‘null’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.

发生错误的ajax代码如下：

	$.ajax(
	    url: 'http://xxx.com/xxxxx',
	    type: 'POST',
	    dataType: 'json',
	    success:function(data) 
	      console.log(data)
	    
  );

错误发生原因：

这是一个资源跨域问题。

解决方法：

很简单。把dataType的json改为jsonp。

$.ajax(
	    url: 'http://xxx.com/xxxxx',
	    type: 'POST',
	    dataType: 'jsonp',//这里修改成jsonp
	    success:function(data) 
	      console.log(data)
	    
  );