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Thursday 17 September 2009 9:51:32 am
Eezy: with a template operator. two files in extension/myextension/autoloads, plus one in extension/myextension/settings
$eZTemplateOperatorArray = array(
array
(
'script' => 'extension/fdobase/autoloads/fdobasetemplateoperators.php',
'class' => 'myTemplateOperators',
'operator_names' => array( 'http_header' ) )
);
...
function namedParameterList() {
return array(
'http_header' => array(
'header' => array(
'type' => 'string',
'required' => true ),
'status_code' => array(
'type' => 'int',
'required' => false,
'default' => 0 ) ) );
function modify( &$tpl, &$operatorName, &$operatorParameters, &$rootNamespace, &$currentNamespace, &$operatorValue, &$namedParameters )
{
switch ( $operatorName )
{
case 'http_header':
{
$header = $namedParameters['header'];
$status_code = $namedParameters['status_code'];
if ( $status_code != 0 )
{
header( $header, true, $status_code );
}
else
{
header( $header );
}
$operatorValue = '';
} break;
}
}
...
And you're done. You can do the same for querying / altering session vars from within templates - very handy at times. Just take care about one thing: if you put this in a view template it will not work, because of the view cache - by default it only works from within the pagelayout and its includes.
2 workarounds:
- disable view cache for the objects that want to set headers (bad)
- use the persistent_variable to pass the http header from the view template to the pagelayout template, and have the pagelayout template emit the http header (better) example of such a pagelayout:
{def $persistent_var = hash()}
{if is_set($module_result.content_info.persistent_variable)}
{set $persistent_var = merge($persistent_var, $module_result.content_info.persistent_variable)}
{/if}
{if is_set( $persistent_var.http_redirect )}
{if is_set( $persistent_var.http_redirect_status )}
{http_header(concat('Location: ', $persistent_var.http_redirect), $persistent_var.http_redirect_status)}
{else}
{http_header(concat('Location: ', $persistent_var.http_redirect))}
{/if}
{elseif is_set( $persistent_var.http_content_type )}
{http_header(concat('Content-type: ', $persistent_var.http_content_type))}
{$module_result.content}
{else}
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
...
And voilà, you can now do redirects from node view templates and even output pdf, xml or other content-types!
Principal Consultant International Business
Member of the Community Project Board
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