protected QQHttpRequest onBuildRequest() throws QQException, JSONException {
QQSession session = getContext().getSession();
QQHttpRequest req = createHttpRequest("POST", QQConstants.URL_UPLOAD_CUSTOM_FACE);
req.addGetValue("time", System.currentTimeMillis() / 1000 + "");
req.addPostValue("from", "control");
req.addPostValue("f", "EQQ.Model.ChatMsg.callbackSendPicGroup");
req.addPostValue("vfwebqq", session.getVfwebqq());
req.addPostValue("fileid", getContext().getStore().getPicItemListSize() + "");
req.addPostFile("custom_face", file);