function RedirectToCachedFile() {
global $phpThumb, $PHPTHUMB_CONFIG;
$nice_cachefile = str_replace(DIRECTORY_SEPARATOR, '/', $phpThumb->cache_filename);
$nice_docroot = str_replace(DIRECTORY_SEPARATOR, '/', rtrim($PHPTHUMB_CONFIG['document_root'], '/\\'));
$parsed_url = phpthumb_functions::ParseURLbetter(@$_SERVER['HTTP_REFERER']);
$nModified = filemtime($phpThumb->cache_filename);
if ($phpThumb->config_nooffsitelink_enabled && @$_SERVER['HTTP_REFERER'] && !in_array(@$parsed_url['host'], $phpThumb->config_nooffsitelink_valid_domains)) {
$phpThumb->DebugMessage('Would have used cached (image/'.$phpThumb->thumbnailFormat.') file "'.$phpThumb->cache_filename.'" (Last-Modified: '.gmdate('D, d M Y H:i:s', $nModified).' GMT), but skipping because $_SERVER[HTTP_REFERER] ('.@$_SERVER['HTTP_REFERER'].') is not in $phpThumb->config_nooffsitelink_valid_domains ('.implode(';', $phpThumb->config_nooffsitelink_valid_domains).')', __FILE__, __LINE__);
} elseif ($phpThumb->phpThumbDebug) {
$phpThumb->DebugTimingMessage('skipped using cached image', __FILE__, __LINE__);
$phpThumb->DebugMessage('Would have used cached file, but skipping due to phpThumbDebug', __FILE__, __LINE__);
$phpThumb->DebugMessage('* Would have sent headers (1): Last-Modified: '.gmdate('D, d M Y H:i:s', $nModified).' GMT', __FILE__, __LINE__);
if ($getimagesize = @GetImageSize($phpThumb->cache_filename)) {
$phpThumb->DebugMessage('* Would have sent headers (2): Content-Type: '.phpthumb_functions::ImageTypeToMIMEtype($getimagesize[2]), __FILE__, __LINE__);
}
if (preg_match('#^'.preg_quote($nice_docroot).'(.*)$#', $nice_cachefile, $matches)) {
$phpThumb->DebugMessage('* Would have sent headers (3): Location: '.dirname($matches[1]).'/'.urlencode(basename($matches[1])), __FILE__, __LINE__);
} else {
$phpThumb->DebugMessage('* Would have sent data: readfile('.$phpThumb->cache_filename.')', __FILE__, __LINE__);
}
} else {
if (headers_sent()) {
$phpThumb->ErrorImage('Headers already sent ('.basename(__FILE__).' line '.__LINE__.')');
exit;
}
SendSaveAsFileHeaderIfNeeded();
header('Last-Modified: '.gmdate('D, d M Y H:i:s', $nModified).' GMT');
if (@$_SERVER['HTTP_IF_MODIFIED_SINCE'] && ($nModified == strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE'])) && @$_SERVER['SERVER_PROTOCOL']) {
header($_SERVER['SERVER_PROTOCOL'].' 304 Not Modified');
exit;
}
if ($getimagesize = @GetImageSize($phpThumb->cache_filename)) {
header('Content-Type: '.phpthumb_functions::ImageTypeToMIMEtype($getimagesize[2]));
} elseif (preg_match('#\\.ico$#i', $phpThumb->cache_filename)) {
header('Content-Type: image/x-icon');
}
if (!@$PHPTHUMB_CONFIG['cache_force_passthru'] && preg_match('#^'.preg_quote($nice_docroot).'(.*)$#', $nice_cachefile, $matches)) {
header('Location: '.dirname($matches[1]).'/'.urlencode(basename($matches[1])));
} else {
@readfile($phpThumb->cache_filename);
}
exit;
}
return true;
}
////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
if (@$_GET['phpThumbDebug'] == '5') {
$phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////
// check to see if file already exists in cache, and output it with no processing if it does
$phpThumb->SetCacheFilename();
if (is_file($phpThumb->cache_filename)) {
$parsed_url = @parse_url(@$_SERVER['HTTP_REFERER']);
if ($phpThumb->config_nooffsitelink_enabled && @$_SERVER['HTTP_REFERER'] && !in_array(@$parsed_url['host'], $phpThumb->config_nooffsitelink_valid_domains)) {
$phpThumb->DebugMessage('Would have used cached (image/' . $phpThumb->thumbnailFormat . ') file "' . $phpThumb->cache_filename . '" (Last-Modified: ' . gmdate('D, d M Y H:i:s', filemtime($phpThumb->cache_filename)) . ' GMT), but skipping because $_SERVER[HTTP_REFERER] (' . @$_SERVER['HTTP_REFERER'] . ') is not in $phpThumb->config_nooffsitelink_valid_domains (' . implode(';', $phpThumb->config_nooffsitelink_valid_domains) . ')', __FILE__, __LINE__);
} elseif (@$_GET['phpThumbDebug']) {
$phpThumb->DebugMessage('Would have used cached (image/' . $phpThumb->thumbnailFormat . ') file "' . $phpThumb->cache_filename . '" (Last-Modified: ' . gmdate('D, d M Y H:i:s', filemtime($phpThumb->cache_filename)) . ' GMT), but skipping due to phpThumbDebug', __FILE__, __LINE__);
} else {
SendSaveAsFileHeaderIfNeeded();
header('Last-Modified: ' . gmdate('D, d M Y H:i:s', filemtime($phpThumb->cache_filename)) . ' GMT');
if ($getimagesize = @GetImageSize($phpThumb->cache_filename)) {
header('Content-type: ' . phpthumb_functions::ImageTypeToMIMEtype($getimagesize[2]));
}
@readfile($phpThumb->cache_filename);
exit;
}
} else {
$phpThumb->DebugMessage('Cached file "' . $phpThumb->cache_filename . '" does not exist, processing as normal', __FILE__, __LINE__);
}
////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
if (@$_GET['phpThumbDebug'] == '6') {
$phpThumb->phpThumbDebug();
}
