facebook图片发布不适用于首次登录用户

Question

我在Facebook上发布的代码，如果用户没有登录并且第一次调用此图像，则不会发布图像。在第二次登录时它工作正常，意味着它要求用户访问权限和所有。

 window.fbAsyncInit = function() {
    FB.init({appId: '********', status: true, cookie: true, xfbml: true, oauth : true});

}
$(document).on('click','#share_facebook',function()
{
// alert('fb_share click');
$('.description').css('display', 'none');
$('#step5_fb_share').css('display', 'block');

});

$(document).on('click','#postonfb',function()
{

//alert('Post On fb'+$('#fb_wall_msg').val());
 msgtopost=$('#fb_wall_msg').val();

   FB.getLoginStatus(function(response) {
       alert('page '+response.status);
      if (response.status === 'connected') {
          alert(response.authResponse.accessToken);
        testAPI();

        // connected
      } else if (response.status === 'not_authorized') {
        // not_authorized 
        login();


      } else {
        // not_logged_in
         //alert('Not logged in');   FB.login();
         login();
      }
     });
 });
  // Here we run a very simple test of the Graph API after login is successful. 
  // This testAPI() function is only called in those cases. 
  function testAPI() {
 console.log('Welcome!  Fetching your information.... ');
    FB.api('/me', function(response) {
      console.log('Good to see you, ' + response.name + '.');
    });

var postMSG = msgtopost;  
//var filename = 'board_download/image.png'; 
var filename = 'http://alpha.probytes.net/Khet/board_download/image.png'; 

FB.api('/me/photos', 'post', {
    message:postMSG,
    url:filename        
    }, function(response){
        if (!response || response.error)
        {
      alert('Post Failed !! ');
        }
        else
        {  
           //alert('Post Successfully !! ' + response.id);
      alert('Post Successfully !! ');
        }
    }
);
  }

  function  login()
  {
   FB.login(function(response) {
             if (response.authResponse) {
               testAPI();
             } else {

               console.log('User cancelled login or did not fully authorize.'+response.authResponse);
             }
           }, {scope: 'publish_stream'});
  }