Facebook graph api appscript UrlFetchApp.fetch的参数无效

我正在尝试使用google appscript从facebook FQL api获取数据。不幸的是，我一直遇到以下错误：

Error encountered: Invalid argument: https://graph.facebook.com/fql?q=SELECT+post_id,share_info,comment_info,like_info,created_time+FROM+stream+WHERE+post_id+IN+(SELECT+post_id+FROM+stream+WHERE+source_id='SOME_SOURCE_ID'+AND+created_time+>+1369869370+AND+created_time+<+1377645370+ORDER+BY+created_time+DESC+LIMIT+0,100)&access_token=XXXXXXXXX

事实证明，

不是可放入url的有效字符。将它们更改为

%3E

和

%3C

，现在世界一切正常

var posturl = "https://graph.facebook.com/fql?q=SELECT+post_id,share_info,comment_info,like_info,created_time+FROM+stream+WHERE+post_id+IN+" +
              "(SELECT+post_id+FROM+stream+WHERE+source_id='" + source + "'+AND+created_time+>+" + istartEpoch.toString() + 
              "+AND+created_time+<+" + iendEpoch.toString() + "+ORDER+BY+created_time+DESC+LIMIT+0,100)&access_token=" + token;

var postfetch = UrlFetchApp.fetch(posturl);
var postjson = postfetch.getContentText();
var postdata = Utilities.jsonParse(postjson);