SharePoint 2013 - Using Web Proxy

用于在SharePoint中调用其它网站服务时使用。

1. 需要引用sp.js 和 sp.runtime.js文件；

2. 需要用到SP.WebRequestInfo，SP.WebProxy，和SP.WebReponseInfo对象；

3. 例子：

(function () {
    // Prepare the request to an RSS source
    //  using the GET verb
    var context = SP.ClientContext.get_current();
    var request = new SP.WebRequestInfo();
    request.set_url(
        "http://www.microsoft.com/en-us/news/rss/rssfeed.aspx?ContentType=FeatureStories"
        );
    request.set_method("GET");
    var response = SP.WebProxy.invoke(context, request); //response is type of SP.WebResponseInfo

    // Let users know that there is some
    //  processing going on
    document.getElementById("stories").innerHTML =
                "<P>Loading stories...</P>";

    // Set the event handlers and invoke the request
    context.executeQueryAsync(Function.createDelegate(this, successHandler), Function.createDelegate(this, errorHandler));
})();