From 4d6e7659706445947795fa5319a0d988e8cbff49 Mon Sep 17 00:00:00 2001
From: Moritz Bunkus <m.bunkus@linet-services.de>
Date: Mon, 7 Mar 2011 13:19:38 +0100
Subject: [PATCH] Funktion "send_file" im Controller, um Dateien
 herunterzuladen

---
 SL/Controller/Base.pm | 32 ++++++++++++++++++++++++++++++++
 SL/Form.pm            |  2 ++
 2 files changed, 34 insertions(+)

diff --git a/SL/Controller/Base.pm b/SL/Controller/Base.pm
index d80fca16d..d50d519b7 100644
--- a/SL/Controller/Base.pm
+++ b/SL/Controller/Base.pm
@@ -5,6 +5,7 @@ use strict;
 use parent qw(Rose::Object);
 
 use Carp;
+use IO::File;
 use List::Util qw(first);
 
 #
@@ -83,6 +84,22 @@ sub render {
   return $output;
 }
 
+sub send_file {
+  my ($self, $file_name, %params) = @_;
+
+  my $file            = IO::File->new($file_name, 'r') || croak("Cannot open file '${file_name}'");
+  my $content_type    =  $params{type} || 'application/octet_stream';
+  my $attachment_name =  $params{name} || $file_name;
+  $attachment_name    =~ s:.*//::g;
+
+  print $::form->create_http_response(content_type        => $content_type,
+                                      content_disposition => 'attachment; filename="' . $attachment_name . '"',
+                                      content_length      => -s $file);
+
+  $::locale->with_raw_io(\*STDOUT, sub { print while <$file> });
+  $file->close;
+}
+
 #
 # Before/after run hooks
 #
@@ -368,6 +385,21 @@ browser. Typical use for actions called via AJAX:
   $self->render('todo/single_item', { type => 'js' },
                 item => $employee->most_important_todo_item);
 
+=item C<send_file $file_name, [%params]>
+
+Sends the file C<$file_name> to the browser including appropriate HTTP
+headers for a download. C<%params> can include the following:
+
+=over 2
+
+=item * C<type> -- the file's content type; defaults to
+'application/octet_stream'
+
+=item * C<name> -- the name presented to the browser; defaults to
+C<$file_name>
+
+=back
+
 =item C<url_for $url>
 
 =item C<url_for $params>
diff --git a/SL/Form.pm b/SL/Form.pm
index b2cb1dead..1a2573960 100644
--- a/SL/Form.pm
+++ b/SL/Form.pm
@@ -629,6 +629,8 @@ sub create_http_response {
   $cgi_params{'-charset'} = $params{charset} if ($params{charset});
   $cgi_params{'-cookie'}  = $session_cookie  if ($session_cookie);
 
+  map { $cgi_params{'-' . $_} = $params{$_} if exists $params{$_} } qw(content_disposition content_length);
+
   my $output = $cgi->header(%cgi_params);
 
   $main::lxdebug->leave_sub();
-- 
2.20.1