解决Ajax跨域问题：Origin xx is not allowed by Access-Control-Allow-Origin.
2014-08-22 21:27
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解决Ajax跨域问题：Origin xx is not allowed by Access-Control-Allow-Origin.
今天一个Ajax跨域问题，纠结我半天，记录之。<html>
<head>
<title>title</title>
<script src="http://code.jquery.com/jquery-1.7.1.min.js"></script>
<script>
$.ajax({
url:"http://map.yanue.net/gpsApi.php?lat=22.502412986242&lng=113.93832783228",
type:'GET',
success: function(data){
$('body').append( "Name: " + data );
}
});
</script>
</head>
<body>
测试Ajax跨域问题
</body>
</html>没有结果，chrome用F12 下查看错误 得知：XMLHttpRequest cannot load http://map.yanue.net/gpsApi.php?lat=22.502412986242&lng=113.93832783228. Origin http://localhost is not allowed by Access-Control-Allow-Origin. AJAX跨域问题产生。
搜了好久，得知解决方案：
一：使用jsonp格式， 如jquery中ajax请求参数 dataType:'JSONP'。(可选)
<html>
<head>
<title>title</title>
<script src="http://code.jquery.com/jquery-1.7.1.min.js"></script>
<script>
$.ajax({
url:"http://map.yanue.net/gpsApi.php?lat=22.502412986242&lng=113.93832783228",
type:'GET',
dataType:'JSONP',
success: function(data){
$('body').append( "Name: " + data );
}
});
</script>
</head>
<body>
测试Ajax跨域问题
</body>
</html>二，server端加上header设为 Access-Control-Allow-Origin：*
getHttpServletResponse().setHeader("Access-Control-Allow-Origin", "*"); // 跨域处理问题就解决了。
感谢: http://yanue.net/post-130.html
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