angularjs post 跨域

web api搞好了；用Ajax妥妥的；但是前端用的AngulagJS，也懒得再换为Ajax了；

但是问题来了；提示：

已拦截跨源请求：同源策略禁止读取位于 http://x.x.x.x:port/api/Person/Update 的远程资源。（原因：CORS 预检通道未成功）。

搜索一下：一般就是配置服务器和客户端的header

找到了一篇可以解决的：http://www.cnblogs.com/BGOnline/p/5996289.html

1.开启angularjs的CORS支持

.config(function($httpProvider) { // CORS post跨域配置
    $httpProvider.defaults.useXDomain = true;
    $httpProvider.defaults.headers.post['Content-Type'] = 'application/x-www-form-urlencoded;charset=utf-8';
    var param = function(obj) {  // 修改angularjs $http.post的默认传参方式
        var query = '', name, value, fullSubName, subName, subValue, innerObj, i;

        for(name in obj) {
        value = obj[name];

        if(value instanceof Array) {
            for(i=0; i<value.length; ++i) {
                subValue = value[i];
                fullSubName = name + '[' + i + ']';
                innerObj = {};
                innerObj[fullSubName] = subValue;
                query += param(innerObj) + '&';
            }
        }
        else if(value instanceof Object) {
            for(subName in value) {
                subValue = value[subName];
                fullSubName = name + '[' + subName + ']';
                innerObj = {};
                innerObj[fullSubName] = subValue;
                query += param(innerObj) + '&';
            }
        }
        else if(value !== undefined && value !== null)
            query += encodeURIComponent(name) + '=' + encodeURIComponent(value) + '&';
        }

        return query.length ? query.substr(0, query.length - 1) : query;
    };

    $httpProvider.defaults.transformRequest = [function(data) {
        return angular.isObject(data) && String(data) !== '[object File]' ? param(data) : data;
    }];

    delete $httpProvider.defaults.headers.common['X-Requested-With'];
})

2.开启服务器端CORS支持

header('Access-Control-Allow-Origin: *');//(我不知道这个是怎么配置的，PHP的？)

我自己的web.config相关配置

    <!--跨域..-->
    <httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*" />
        <!--Content-Type,-->
        <add name="Access-Control-Allow-Headers" value="Origin, X-Requested-With, Content-Type, Accept" />
        <add name="Access-Control-Allow-Methods" value="GET,POST,PUT, DELETE, OPTIONS" />
      </customHeaders>
    </httpProtocol>
  </system.webServer>