文件上传后的codeigniter重定向

Question

1) situation: On some page the user can use an file upload form to upload a text (or excel) file. After successful upload the user should be redirected to a page where he can do whatever with his file.

2) My controller class:

...
if (!$this->upload->do_upload('fileupload')) {
            echo "error file upload not successfull";
   }else {
       redirect('import/filepreview/');
   }

3) what happens

First nothing appears to happen. The file has been uploaded but the page doesn't change. While using firebug extension it appears there has been sent a Header containing a get request to the proper target url and all the expected content is in the answer. But not displaying on site.

I actually don't know what I am doing wrong.

Answer 1

Solved the problem but only using a workaround. Finally I used javascript redirection

window.location.replace("http://new.../x_id");

with an x_id which the servers answer to the file upload.

So everything works fine for me. But the original question, why CI's redirect does not work is still open for me.