API调用返回额外的不必要的HTML头信息

您好我想提出一个调用的API和它返回API调用返回额外的不必要的HTML头信息

[{"ActorID":1,"ActorName":"dfdsf","ActorOccupation":0,"ActorLevel":3,"VsRank":10,"PVP_Vs":0,"FightTotalCount":"0","WinCount":"0"}, 
{"ActorID":2,"ActorName":"sdsf","ActorOccupation":0,"ActorLevel":0,"VsRank":10,"PVP_Vs":0,"FightTotalCount":"0","WinCount":"0"}] 


    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
    <html 
     xmlns="http://www.w3.org/1999/xhtml"> 
     <head> 
      <title></title> 
     </head> 
     <body> 
      <form method="post" action="GetRankingList.aspx?pvptype=1&amp;sid=1&amp;tm=20130821160000&amp;auth=77c9b582c3aed3d3974400cfb118fe4b" id="form1"> 
       <div class="aspNetHidden"> 
        <input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwULLTE2MTY2ODcyMjlkZLSAAAtd4/lj1u6b0GjPWM+p3i9tqI6sq+xDrRw2cAv3" /> 
       </div> 
       <div></div> 
      </form> 
     </body> 
    </html>

所有我想要的是一个简单的JSON数组对象。我没有写这个API，但是有没有人知道我可以怎么指定我想要的对象本身。我已经指定了