ajax有时会返回#document，有时Object {d：Object}

Question

当我在Chrome中查看控制台时，Sharepoint页面的行为与data为Object {d: Object}时的假设相同，d是want项的数组。

当数据是#document，页面不会加载，因为我根据数据添加html。

我明白＃文档出现是因为jQuery的智能猜测，但我不确定它为什么会返回。

function getItems() { 
    var url = hostWebURL + "_api/web/lists('" + guid + "')/items/"; 
    var items; 
    $.ajax({ 
      url: url, 
      type: "GET", 
      headers: { "Accept": "application/json;odata=verbose "}, // return data format 
      success: function (data) { 
       //items is iterable ListItemCollection 
          console.log(data); 
       items = data.d.results; 
      ... 
      }, 
      error: function (error) { 
       var errorMsg = ""; 

       if (error.status == "403" || error.status == "401") { 
        errorMsg = "You do not have Authorization to see Site Permissions - ErrorCode(" + error.status + ") Error Details: " + error.statusText; 
       } 
       else { 
        var errorMsg = "Failed - ErrorCode(" + error.status + ") Error Details: " + error.statusText; 
       } 

       reportError(errorMsg); 

Answer 1

beforeSend: function (XMLHttpRequest) {     
     XMLHttpRequest.setRequestHeader("Accept", "application/json; odata=verbose"); 

添加该参数，调用它的工作！

来自http://ratsubsharewall.blogspot.com/2017/02/rest-call-returns-xml-instead-of-json.html