rest版本设计

1.0: vnd.example-com.foo+json; version=1.0
1.1: vnd.example-com.foo+json; version=1.1
2.0: vnd.example-com.foo+json; version=2.0

$.ajax({
beforeSend: function (req) {
req.setRequestHeader("Accept", "vnd.example-com.foo+json; version=1.1");
},
type: "GET",
url: "http://http://www.example.com/foo/12",
success: function (data) {
/* code elided */
},
dataType: "json"
});