Where can I set headers in laravel

I want to set headers as array('Cache-Control'=>'no-cache, no-store, max-age=0, must-revalidate','Pragma'=>'no-cache','Expires'=>'Fri, 01 Jan 1990 00:00:00 GMT'); for all my views, currently I'm doing this in all controllers while returning views, like

$headers=array('Cache-Control'=>'no-cache, no-store, max-age=0, must-revalidate','Pragma'=>'no-cache','Expires'=>'Fri, 01 Jan 1990 00:00:00 GMT');

Redirect::to('/',301,$headers);`

So instead of writing this for each and every route can it be done in global scope, so that headers are set for every view.

I tried setting headers by creating after filter, but didn't get it to work.

Can anyone tell me where can I set the headers for all my views?

UPDATE One of my view file meta content

<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>

Now when i use Redirect::to('/',301,$headers) The header in firebug is

Cache-Control   max-age=0, must-revalidate, no-cache, no-store, private
Connection  Keep-Alive
Content-Type    text/html; charset=UTF-8
Date    Tue, 09 Jul 2013 14:52:08 GMT
Expires Fri, 01 Jan 1990 00:00:00 GMT

And when I use Redirect::to('/');

The header in firebug is

Cache-Control   no-cache
Connection  Keep-Alive
Content-Type    text/html; charset=UTF-8
Date    Tue, 09 Jul 2013 14:52:08 GMT

Solution

There are a couple of different ways you could do this - all have advantages/disadvantages.

Option 1 (simple): Since the array is just static data - just manually put the headers in your view layouts directly - i.e. dont pass it from anywhere - code it straight in your view.

<?php
  //set headers to NOT cache a page
  header("Cache-Control: no-cache, must-revalidate"); //HTTP 1.1
  header("Pragma: no-cache"); //HTTP 1.0
  header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past
?>

Option 2: Use view composers. You can use an App before filter to bind the header to all views in your app.

App::before(function($request)  
{
     $headers=array('Cache-Control'=>'no-cache, no-store, max-age=0, must-revalidate','Pragma'=>'no-cache','Expires'=>'Fri, 01 Jan 1990 00:00:00 GMT');

     View::share('headers', $headers);
});

Then just echo out the $headers in your view(s).

Note: you must let the view set your headers - that is why we are 'passing' the header into view for Laravel to handle. If you try and output the header itself from within a filter or something, you'll cause issues.

Edit Option 3: I just found out about this - you could try this

App::before(function($request)  
{
     Response::header('Cache-Control', 'nocache, no-store, max-age=0, must-revalidate');
     Response::header('Pragma', 'no-cache');
     Response::header('Expires', 'Fri, 01 Jan 1990 00:00:00 GMT');
});