drupal - How to finish batch and redirect then -

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I am working on a Drupal 7 project. I am using a batch, put some operations, and showing progress bar in my "FormulaInterfinished", which is executed in the end, as the last operation of the batch, I want to download a file, And then want to redirect to another page, because the process has ended.

However, the readfile () function uses a drupal_exit (), and therefore my redirection is not done.

This is my code:

function formulaire_finished ($ success, $ result, $ operations) {if ($ success) {$ path = $ result [infos' ] ['Path']; Download_file ($ path); // redirection drupal_goto ($ _ session ['my_page'], array ('query' = & gt; array ('description' => 1 ')); } Else {// An error occurred. // $ includes operations that are unposted $ error_operation = reset ($ operation); Drupal_set_message (t ('error with support' operation during error: @gorge ', array (' @ operation '=> $ error_operation [0],' @args' = & gt; print_r ($ error_operation [0] ], TRUE),))); }}

Download function: 

  function download_file ($ path) {$ dir = $ path; $ Filename = basename ($ dir); If (strokes ($ _ server ['HTTP_USER_AGENT'], 'MSIE')) {drupal_add_http_header ('Pragma', 'public'); Drupal_add_http_header ('Cache-Control', 'Required-Re-Modified, Post Check = 0, Pre-Check = 0'); } Other {drupal_add_http_header ('pragma', 'no-cache'); } Drupal_add_http_header ('End', '0'); Drupal_add_http_header ('content-type', 'application / vnd.ms-excel'); Drupal_add_http_header ('content break', 'attachment; file name =' .busname ($ dir). ';'); Drupal_add_http_header ('Content-Transfer-Encoding', 'Binary'); Drupal_add_http_header ('content-length', filesystem ($ dir)); Readfile ($ dir); To unlink ($ dir); Drupal_exit (); }   
 All ideas are welcome.   
 
 
 I do not think you want to output the file during the callback of a batch operation needed. You must save the file to the Drupal file system and save the file reference. After the batch is over you can download it.

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