Doh, how did this get here?

git-svn-id: http://code.elgg.org/elgg/trunk@8172 36083f99-b078-4883-b0ff-0f9b5a30f544

1 files changed, 0 insertions, 348 deletions

diff --git a/mod/minify/lib/min/lib/HTTP/ConditionalGet.php b/mod/minify/lib/min/lib/HTTP/ConditionalGet.php
deleted file mode 100644
index 823db058f..000000000
--- a/mod/minify/lib/min/lib/HTTP/ConditionalGet.php
+++ /dev/null
@@ -1,348 +0,0 @@
-<?php
-/**
- * Class HTTP_ConditionalGet  
- * @package Minify
- * @subpackage HTTP
- */
-
-/**
- * Implement conditional GET via a timestamp or hash of content
- *
- * E.g. Content from DB with update time:
- * <code>
- * list($updateTime, $content) = getDbUpdateAndContent();
- * $cg = new HTTP_ConditionalGet(array(
- *     'lastModifiedTime' => $updateTime
- *     ,'isPublic' => true
- * ));
- * $cg->sendHeaders();
- * if ($cg->cacheIsValid) {
- *     exit();
- * }
- * echo $content;
- * </code>
- * 
- * E.g. Shortcut for the above
- * <code>
- * HTTP_ConditionalGet::check($updateTime, true); // exits if client has cache
- * echo $content;
- * </code>
- *
- * E.g. Content from DB with no update time:
- * <code>
- * $content = getContentFromDB();
- * $cg = new HTTP_ConditionalGet(array(
- *     'contentHash' => md5($content)
- * ));
- * $cg->sendHeaders();
- * if ($cg->cacheIsValid) {
- *     exit();
- * }
- * echo $content;
- * </code>
- * 
- * E.g. Static content with some static includes:
- * <code>
- * // before content
- * $cg = new HTTP_ConditionalGet(array(
- *     'lastUpdateTime' => max(
- *         filemtime(__FILE__)
- *         ,filemtime('/path/to/header.inc')
- *         ,filemtime('/path/to/footer.inc')
- *     )
- * ));
- * $cg->sendHeaders();
- * if ($cg->cacheIsValid) {
- *     exit();
- * }
- * </code>
- * @package Minify
- * @subpackage HTTP
- * @author Stephen Clay <steve@mrclay.org>
- */
-class HTTP_ConditionalGet {
-
-    /**
-     * Does the client have a valid copy of the requested resource?
-     * 
-     * You'll want to check this after instantiating the object. If true, do
-     * not send content, just call sendHeaders() if you haven't already.
-     *
-     * @var bool
-     */
-    public $cacheIsValid = null;
-
-    /**
-     * @param array $spec options
-     * 
-     * 'isPublic': (bool) if true, the Cache-Control header will contain 
-     * "public", allowing proxies to cache the content. Otherwise "private" will 
-     * be sent, allowing only browser caching. (default false)
-     * 
-     * 'lastModifiedTime': (int) if given, both ETag AND Last-Modified headers
-     * will be sent with content. This is recommended.
-     *
-     * 'encoding': (string) if set, the header "Vary: Accept-Encoding" will
-     * always be sent and a truncated version of the encoding will be appended
-     * to the ETag. E.g. "pub123456;gz". This will also trigger a more lenient 
-     * checking of the client's If-None-Match header, as the encoding portion of
-     * the ETag will be stripped before comparison.
-     * 
-     * 'contentHash': (string) if given, only the ETag header can be sent with
-     * content (only HTTP1.1 clients can conditionally GET). The given string 
-     * should be short with no quote characters and always change when the 
-     * resource changes (recommend md5()). This is not needed/used if 
-     * lastModifiedTime is given.
-     * 
-     * 'eTag': (string) if given, this will be used as the ETag header rather
-     * than values based on lastModifiedTime or contentHash. Also the encoding
-     * string will not be appended to the given value as described above.
-     * 
-     * 'invalidate': (bool) if true, the client cache will be considered invalid
-     * without testing. Effectively this disables conditional GET. 
-     * (default false)
-     * 
-     * 'maxAge': (int) if given, this will set the Cache-Control max-age in 
-     * seconds, and also set the Expires header to the equivalent GMT date. 
-     * After the max-age period has passed, the browser will again send a 
-     * conditional GET to revalidate its cache.
-     * 
-     * @return null
-     */
-    public function __construct($spec)
-    {
-        $scope = (isset($spec['isPublic']) && $spec['isPublic'])
-            ? 'public'
-            : 'private';
-        $maxAge = 0;
-        // backwards compatibility (can be removed later)
-        if (isset($spec['setExpires']) 
-            && is_numeric($spec['setExpires'])
-            && ! isset($spec['maxAge'])) {
-            $spec['maxAge'] = $spec['setExpires'] - $_SERVER['REQUEST_TIME'];
-        }
-        if (isset($spec['maxAge'])) {
-            $maxAge = $spec['maxAge'];
-            $this->_headers['Expires'] = self::gmtDate(
-                $_SERVER['REQUEST_TIME'] + $spec['maxAge'] 
-            );
-        }
-        $etagAppend = '';
-        if (isset($spec['encoding'])) {
-            $this->_stripEtag = true;
-            $this->_headers['Vary'] = 'Accept-Encoding';
-            if ('' !== $spec['encoding']) {
-                if (0 === strpos($spec['encoding'], 'x-')) {
-                    $spec['encoding'] = substr($spec['encoding'], 2);
-                }
-                $etagAppend = ';' . substr($spec['encoding'], 0, 2);
-            }
-        }
-        if (isset($spec['lastModifiedTime'])) {
-            $this->_setLastModified($spec['lastModifiedTime']);
-            if (isset($spec['eTag'])) { // Use it
-                $this->_setEtag($spec['eTag'], $scope);
-            } else { // base both headers on time
-                $this->_setEtag($spec['lastModifiedTime'] . $etagAppend, $scope);
-            }
-        } elseif (isset($spec['eTag'])) { // Use it
-            $this->_setEtag($spec['eTag'], $scope);
-        } elseif (isset($spec['contentHash'])) { // Use the hash as the ETag
-            $this->_setEtag($spec['contentHash'] . $etagAppend, $scope);
-        }
-        $this->_headers['Cache-Control'] = "max-age={$maxAge}, {$scope}";
-        // invalidate cache if disabled, otherwise check
-        $this->cacheIsValid = (isset($spec['invalidate']) && $spec['invalidate'])
-            ? false
-            : $this->_isCacheValid();
-    }
-    
-    /**
-     * Get array of output headers to be sent
-     * 
-     * In the case of 304 responses, this array will only contain the response
-     * code header: array('_responseCode' => 'HTTP/1.0 304 Not Modified')
-     * 
-     * Otherwise something like: 
-     * <code>
-     * array(
-     *     'Cache-Control' => 'max-age=0, public'
-     *     ,'ETag' => '"foobar"'
-     * )
-     * </code>
-     *
-     * @return array 
-     */
-    public function getHeaders()
-    {
-        return $this->_headers;
-    }
-
-    /**
-     * Set the Content-Length header in bytes
-     * 
-     * With most PHP configs, as long as you don't flush() output, this method
-     * is not needed and PHP will buffer all output and set Content-Length for 
-     * you. Otherwise you'll want to call this to let the client know up front.
-     * 
-     * @param int $bytes
-     * 
-     * @return int copy of input $bytes
-     */
-    public function setContentLength($bytes)
-    {
-        return $this->_headers['Content-Length'] = $bytes;
-    }
-
-    /**
-     * Send headers
-     * 
-     * @see getHeaders()
-     * 
-     * Note this doesn't "clear" the headers. Calling sendHeaders() will
-     * call header() again (but probably have not effect) and getHeaders() will
-     * still return the headers.
-     *
-     * @return null
-     */
-    public function sendHeaders()
-    {
-        $headers = $this->_headers;
-        if (array_key_exists('_responseCode', $headers)) {
-            header($headers['_responseCode']);
-            unset($headers['_responseCode']);
-        }
-        foreach ($headers as $name => $val) {
-            header($name . ': ' . $val);
-        }
-    }
-    
-    /**
-     * Exit if the client's cache is valid for this resource
-     *
-     * This is a convenience method for common use of the class
-     *
-     * @param int $lastModifiedTime if given, both ETag AND Last-Modified headers
-     * will be sent with content. This is recommended.
-     *
-     * @param bool $isPublic (default false) if true, the Cache-Control header 
-     * will contain "public", allowing proxies to cache the content. Otherwise 
-     * "private" will be sent, allowing only browser caching.
-     *
-     * @param array $options (default empty) additional options for constructor
-     *
-     * @return null     
-     */
-    public static function check($lastModifiedTime = null, $isPublic = false, $options = array())
-    {
-        if (null !== $lastModifiedTime) {
-            $options['lastModifiedTime'] = (int)$lastModifiedTime;
-        }
-        $options['isPublic'] = (bool)$isPublic;
-        $cg = new HTTP_ConditionalGet($options);
-        $cg->sendHeaders();
-        if ($cg->cacheIsValid) {
-            exit();
-        }
-    }
-    
-    
-    /**
-     * Get a GMT formatted date for use in HTTP headers
-     * 
-     * <code>
-     * header('Expires: ' . HTTP_ConditionalGet::gmtdate($time));
-     * </code>  
-     *
-     * @param int $time unix timestamp
-     * 
-     * @return string
-     */
-    public static function gmtDate($time)
-    {
-        return gmdate('D, d M Y H:i:s \G\M\T', $time);
-    }
-    
-    protected $_headers = array();
-    protected $_lmTime = null;
-    protected $_etag = null;
-    protected $_stripEtag = false;
-    
-    protected function _setEtag($hash, $scope)
-    {
-        $this->_etag = '"' . substr($scope, 0, 3) . $hash . '"';
-        $this->_headers['ETag'] = $this->_etag;
-    }
-
-    protected function _setLastModified($time)
-    {
-        $this->_lmTime = (int)$time;
-        $this->_headers['Last-Modified'] = self::gmtDate($time);
-    }
-
-    /**
-     * Determine validity of client cache and queue 304 header if valid
-     */
-    protected function _isCacheValid()
-    {
-        if (null === $this->_etag) {
-            // lmTime is copied to ETag, so this condition implies that the
-            // server sent neither ETag nor Last-Modified, so the client can't 
-            // possibly has a valid cache.
-            return false;
-        }
-        $isValid = ($this->resourceMatchedEtag() || $this->resourceNotModified());
-        if ($isValid) {
-            $this->_headers['_responseCode'] = 'HTTP/1.0 304 Not Modified';
-        }
-        return $isValid;
-    }
-
-    protected function resourceMatchedEtag()
-    {
-        if (!isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
-            return false;
-        }
-        $clientEtagList = get_magic_quotes_gpc()
-            ? stripslashes($_SERVER['HTTP_IF_NONE_MATCH'])
-            : $_SERVER['HTTP_IF_NONE_MATCH'];
-        $clientEtags = explode(',', $clientEtagList);
-        
-        $compareTo = $this->normalizeEtag($this->_etag);
-        foreach ($clientEtags as $clientEtag) {
-            if ($this->normalizeEtag($clientEtag) === $compareTo) {
-                // respond with the client's matched ETag, even if it's not what
-                // we would've sent by default
-                $this->_headers['ETag'] = trim($clientEtag);
-                return true;
-            }
-        }
-        return false;
-    }
-    
-    protected function normalizeEtag($etag) {
-        $etag = trim($etag);
-        return $this->_stripEtag
-            ? preg_replace('/;\\w\\w"$/', '"', $etag)
-            : $etag;
-    }
-
-    protected function resourceNotModified()
-    {
-        if (!isset($_SERVER['HTTP_IF_MODIFIED_SINCE'])) {
-            return false;
-        }
-        $ifModifiedSince = $_SERVER['HTTP_IF_MODIFIED_SINCE'];
-        if (false !== ($semicolon = strrpos($ifModifiedSince, ';'))) {
-            // IE has tacked on extra data to this header, strip it
-            $ifModifiedSince = substr($ifModifiedSince, 0, $semicolon);
-        }
-        if ($ifModifiedSince == self::gmtDate($this->_lmTime)) {
-            // Apache 2.2's behavior. If there was no ETag match, send the 
-            // non-encoded version of the ETag value.
-            $this->_headers['ETag'] = $this->normalizeEtag($this->_etag);
-            return true;
-        }
-        return false;
-    }
-}