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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
View File

@@ -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

2
lib/Minify/Controller/Base.php
View File

@@ -45,7 +45,7 @@ abstract class Minify_Controller_Base {
,'encodeLevel' => 9
,'minifierOptions' => array() // no minifier options
,'contentTypeCharset' => 'UTF-8'
,'setExpires' => null // use conditional GET
,'maxAge' => null // no Expires/max-age
,'quiet' => false // serve() will send headers and output
,'debug' => false

19
web/test/test_Minify.php
View File

@@ -23,7 +23,12 @@ function test_Minify()
'success' => true
,'statusCode' => 304
,'content' => '',
'headers' => array()
'headers' => array(
'Last-Modified' => gmdate('D, d M Y H:i:s \G\M\T', $lastModified),
'ETag' => "\"{$lastModified}pub\"",
'Cache-Control' => 'max-age=0, public, must-revalidate',
'_responseCode' => 'HTTP/1.0 304 Not Modified',
)
);
$output = Minify::serve('Files', array(
'files' => $thisDir . '/_test_files/css/styles.css' // controller casts to array
@@ -43,20 +48,24 @@ function test_Minify()
//! class_exists('Cache_Lite_File', false)
! class_exists('HTTP_Encoder', false)
&& ! class_exists('Minify_CSS', false)
,'Encoder.php, CSS.php not loaded'
&& ! class_exists('Minify_Cache', false)
,'Encoder.php, CSS.php, Cache.php not loaded'
);
// Test minifying JS and serving with Expires header
$content = preg_replace('/\\r\\n?/', "\n", file_get_contents($minifyTestPath . '/minified.js'));
$lastModified = filemtime($minifyTestPath . '/minified.js');
$expected = array(
'success' => true
,'statusCode' => 200
// Minify_Javascript always converts to \n line endings
,'content' => $content
,'headers' => array (
'Cache-Control' => 'public, max-age=86400',
'Expires' => gmdate('D, d M Y H:i:s \G\M\T', $tomorrow),
'Expires' => gmdate('D, d M Y H:i:s \G\M\T', $tomorrow),
'Last-Modified' => gmdate('D, d M Y H:i:s \G\M\T', $lastModified),
'ETag' => "\"{$lastModified}pub\"",
'Cache-Control' => 'max-age=86400, public, must-revalidate',
'Content-Length' => strlen($content),
'Content-Type' => 'application/x-javascript; charset=UTF-8',
)
@@ -67,7 +76,7 @@ function test_Minify()
,$minifyTestPath . '/QueryString.js'
)
,'quiet' => true
,'setExpires' => $tomorrow
,'maxAge' => 86400
,'encodeOutput' => false
));
$passed = assertTrue($expected === $output, 'Minify : JS and Expires');