function file_transfer in Drupal 7

Same name and namespace in other branches

1. 4 includes/file.inc \file_transfer()
2. 5 includes/file.inc \file_transfer()
3. 6 includes/file.inc \file_transfer()

Transfers a file to the client using HTTP.

Pipes a file through Drupal to the client.

Parameters

$uri: String specifying the file URI to transfer.

$headers: An array of HTTP headers to send along with file.

Related topics

2 calls to file_transfer()

file_download in includes/file.inc

Menu handler for private file transfers.

image_style_deliver in modules/image/image.module

Page callback: Generates a derivative, given a style and image path.

File

includes/file.inc, line 2031

API for handling file uploads and server file management.

Code

function file_transfer($uri, $headers) {
  if (ob_get_level()) {
    ob_end_clean();
  }
  foreach ($headers as $name => $value) {
    drupal_add_http_header($name, $value);
  }
  drupal_send_headers();
  $scheme = file_uri_scheme($uri);

  // Transfer file in 1024 byte chunks to save memory usage.
  if ($scheme && file_stream_wrapper_valid_scheme($scheme) && ($fd = fopen($uri, 'rb'))) {
    while (!feof($fd)) {
      print fread($fd, 1024);
    }
    fclose($fd);
  }
  else {
    drupal_not_found();
  }
  drupal_exit();
}