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Resolved issue 37: replaced 'setExpires' with 'maxAge' option which allows both Expires headers and conditional GETs (if a page should be reloaded in IE, e.g.)

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This commit is contained in:
Steve Clay
2008-07-22 23:39:12 +00:00
parent 3ddc831f20
commit 2a41ee92c1
3 changed files with 47 additions and 44 deletions
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70
lib/Minify.php
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@@ -93,10 +93,10 @@ class Minify {
* 'contentTypeCharset' : appended to the Content-Type header sent. Set to a falsey
* value to remove. (default 'UTF-8')
*
* 'setExpires' : set this to a timestamp to have Minify send an HTTP Expires
* header instead of checking for conditional GET (default null).
* E.g. ($_SERVER['REQUEST_TIME'] + 86400 * 365) for 1yr
* Note this has nothing to do with server-side caching.
* 'maxAge' : set this to the number of seconds the client should use its cache
* before revalidating with the server. This sets Cache-Control: max-age and the
* Expires header. Unlike the old 'setExpires' setting, this setting will NOT
* prevent conditional GETs. Note this has nothing to do with server-side caching.
*
* 'debug' : set to true to minify all sources with the 'Lines' controller, which
* eases the debugging of combined files. This also prevents 304 responses.
@@ -148,6 +148,7 @@ class Minify {
$options = $controller->analyzeSources($options);
self::$_options = $controller->mixInDefaultOptions($options);
// check request validity
if (! $controller->sources) {
// invalid request!
if (! self::$_options['quiet']) {
@@ -169,44 +170,36 @@ class Minify {
if (self::$_options['debug']) {
self::_setupDebug($controller->sources);
self::$_options['setExpires'] = time();
self::$_options['maxAge'] = 0;
}
if (null === self::$_options['setExpires']) {
// conditional GET
require_once 'HTTP/ConditionalGet.php';
$cg = new HTTP_ConditionalGet(array(
'lastModifiedTime' => self::$_options['lastModifiedTime']
,'isPublic' => self::$_options['isPublic']
));
if ($cg->cacheIsValid) {
// client's cache is valid
if (! self::$_options['quiet']) {
$cg->sendHeaders();
return;
} else {
return array(
'success' => true
,'statusCode' => 304
,'content' => ''
,'headers' => array()
);
}
// check client cache
require_once 'HTTP/ConditionalGet.php';
$cgOptions = array(
'lastModifiedTime' => self::$_options['lastModifiedTime']
,'isPublic' => self::$_options['isPublic']
);
if (null !== self::$_options['maxAge']) {
$cgOptions['maxAge'] = self::$_options['maxAge'];
}
$cg = new HTTP_ConditionalGet($cgOptions);
if ($cg->cacheIsValid) {
// client's cache is valid
if (! self::$_options['quiet']) {
$cg->sendHeaders();
return;
} else {
// client will need output
$headers = $cg->getHeaders();
unset($cg);
return array(
'success' => true
,'statusCode' => 304
,'content' => ''
,'headers' => $cg->getHeaders()
);
}
} else {
// don't need conditional GET
$privacy = self::$_options['isPublic']
? 'public'
: 'private';
$headers = array(
'Cache-Control' => $privacy . ', max-age='
. (self::$_options['setExpires'] - $_SERVER['REQUEST_TIME'])
,'Expires' => gmdate('D, d M Y H:i:s \G\M\T', self::$_options['setExpires'])
);
// client will need output
$headers = $cg->getHeaders();
unset($cg);
}
// determine encoding
@@ -226,6 +219,7 @@ class Minify {
self::$_options['encodeMethod'] = ''; // identity (no encoding)
}
// check server cache
if (null !== self::$_cache) {
// using cache
// the goal is to use only the cache methods to sniff the length and