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ajax 跨域解决方法,ajax跨域

Jun 13, 2016 am 09:29 AM
ajaxusegopictureexistdevelopasynchronousmethodmostsolveCross domain

ajax 跨域解决方法,ajax跨域

最近在开发过程中,使用ajax去异步调取图片。在开发中这个功能没什么问题,可以后来提测,重新部署之后就有问题了,这就是ajax的跨域问题。

ajax本身是不支持跨域的,这是由于javascript的同源策略所导致。但是我们可以通过其他方法来解决ajax的跨域问题。

1  由于我们是利用了jquery来写的ajax,我们一开始是准备 利用jsonp来解决的,客户端类似下面写法

$.ajax({
	type : "get",
	async:false,
	url : "http://www.xxx.com/ajax.do",
	dataType : "jsonp",
	jsonp: "callbackparam",//服务端用于接收callback调用的function名的参数
	jsonpCallback:"success_jsonpCallback",//callback的function名称
	success : function(json){
		alert(json);
		alert(json[0].name);
	},
	error:function(){
		alert('fail');
	}
});

  服务器端写法

public void ProcessRequest (HttpContext context) {
	context.Response.ContentType = "text/plain";
	String callbackFunName = context.Request["callbackparam"];
	context.Response.Write(callbackFunName + "([ { name:\"John\"}])");
}

  这个方法其实蛮简单的,跟我们之前写的改动不大。

2  由于我们这次项目开发的页面比较多,改动起来涉及的地方就比较多了。最后是采取的 直接修改nginx配置实现的。平时对反向代理的理解也就是 缓存、安全、负载均衡,所以查了下方向代理

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