phpthumb.php

是一款免费的轻量级论坛软件

	global $phpThumb;
	if (@$_GET['down']) {
		$downloadfilename = ereg_replace('[/\\:\*\?"<>|]', '_', $_GET['down']);
		if (phpthumb_functions::version_compare_replacement(phpversion(), '4.1.0', '>=')) {
			$downloadfilename = trim($downloadfilename, '.');
		}
		if (@$downloadfilename) {
			$phpThumb->DebugMessage('SendSaveAsFileHeaderIfNeeded() sending header: Content-Disposition: attachment; filename="'.$downloadfilename.'"', __FILE__, __LINE__);
			header('Content-Disposition: attachment; filename="'.$downloadfilename.'"');
			return true;
		}
	}
	$phpThumb->DebugMessage('SendSaveAsFileHeaderIfNeeded() sending header: Content-Disposition: inline', __FILE__, __LINE__);
	header('Content-Disposition: inline');
	return true;
}

while ($CanPassThroughDirectly && $phpThumb->src) {
	// no parameters set, passthru
	$SourceFilename = $phpThumb->ResolveFilenameToAbsolute($phpThumb->src);

	if (@$_GET['phpThumbDebug']) {

		$phpThumb->DebugMessage('Would have passed "'.$SourceFilename.'" through directly, but skipping due to phpThumbDebug', __FILE__, __LINE__);

	} else {

		// security checks
		if ($GetImageSize = @GetImageSize($SourceFilename)) {
			$ImageCreateFunctions = array(1=>'ImageCreateFromGIF', 2=>'ImageCreateFromJPEG', 3=>'ImageCreateFromPNG');
			if (@$ImageCreateFunctions[$GetImageSize[2]]) {
				$theFunction = $ImageCreateFunctions[$GetImageSize[2]];
				if (function_exists($theFunction) && ($dummyImage = @$theFunction($SourceFilename))) {
					// great
					unset($dummyImage);
				} else {
					$phpThumb->DebugMessage('Not passing "'.$SourceFilename.'" through directly because '.$theFunction.'() failed', __FILE__, __LINE__);
					break;
				}
			} else {
				$phpThumb->DebugMessage('Not passing "'.$SourceFilename.'" through directly because GetImageSize() returned unhandled image type "'.$GetImageSize[2].'"', __FILE__, __LINE__);
				break;
			}
		} else {
			$phpThumb->DebugMessage('Not passing "'.$SourceFilename.'" through directly because GetImageSize() failed', __FILE__, __LINE__);
			break;
		}
		if (headers_sent()) {
			$phpThumb->ErrorImage('Headers already sent ('.basename(__FILE__).' line '.__LINE__.')');
			exit;
		}
		SendSaveAsFileHeaderIfNeeded();
		header('Last-Modified: '.gmdate('D, d M Y H:i:s', @filemtime($SourceFilename)).' GMT');
		if (@$GetImageSize[2]) {
			header('Content-Type: '.phpthumb_functions::ImageTypeToMIMEtype($GetImageSize[2]));
		}
		@readfile($SourceFilename);
		exit;

	}
	break;
}

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[5]', __FILE__, __LINE__);
if (@$_GET['phpThumbDebug'] == '5') {
	$phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

function RedirectToCachedFile() {
	global $phpThumb, $PHPTHUMB_CONFIG;

	$nice_cachefile = str_replace($phpThumb->osslash, '/', $phpThumb->cache_filename);
	$nice_docroot   = str_replace($phpThumb->osslash, '/', rtrim($PHPTHUMB_CONFIG['document_root'], '/\\'));

	$parsed_url = @parse_url(@$_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->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 (ereg('^'.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($getimagesize[2]));
		}
		if (ereg('^'.preg_quote($nice_docroot).'(.*)$', $nice_cachefile, $matches)) {
			header('Location: '.dirname($matches[1]).'/'.urlencode(basename($matches[1])));
		} else {
			@readfile($phpThumb->cache_filename);
		}
		exit;

	}
	return true;
}

// 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)) {
	RedirectToCachedFile();
} 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
$phpThumb->DebugTimingMessage('phpThumbDebug[6]', __FILE__, __LINE__);
if (@$_GET['phpThumbDebug'] == '6') {
	$phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

if ($phpThumb->rawImageData) {

	// great

} elseif (@$_GET['new']) {

	// generate a blank image resource of the specified size/background color/opacity
	if (($phpThumb->w <= 0) || ($phpThumb->h <= 0)) {
		$phpThumb->ErrorImage('"w" and "h" parameters required for "new"');
	}
	@list($bghexcolor, $opacity) = explode('|', $_GET['new']);
	if (!phpthumb_functions::IsHexColor($bghexcolor)) {
		$phpThumb->ErrorImage('BGcolor parameter for "new" is not valid');
	}
	$opacity = (strlen($opacity) ? $opacity : 100);
	if ($phpThumb->gdimg_source = phpthumb_functions::ImageCreateFunction($phpThumb->w, $phpThumb->h)) {
		$alpha = (100 - min(100, max(0, $opacity))) * 1.27;
		if ($alpha) {
			$phpThumb->setParameter('is_alpha', true);
			ImageAlphaBlending($phpThumb->gdimg_source, false);
			ImageSaveAlpha($phpThumb->gdimg_source, true);
		}
		$new_background_color = phpthumb_functions::ImageHexColorAllocate($phpThumb->gdimg_source, $bghexcolor, false, $alpha);
		ImageFilledRectangle($phpThumb->gdimg_source, 0, 0, $phpThumb->w, $phpThumb->h, $new_background_color);
	} else {
		$phpThumb->ErrorImage('failed to create "new" image ('.$phpThumb->w.'x'.$phpThumb->h.')');
	}

} elseif (!$phpThumb->src) {

	$phpThumb->ErrorImage('Usage: '.$_SERVER['PHP_SELF'].'?src=/path/and/filename.jpg'."\n".'read Usage comments for details');

} elseif (eregi('^http\://', $phpThumb->src)) {

	ob_start();
	$HTTPurl = strtr($phpThumb->src, array(' '=>'%20'));
	if ($fp = fopen($HTTPurl, 'rb')) {

		$rawImageData = '';
		do {
			$buffer = fread($fp, 8192);
			if (strlen($buffer) == 0) {
				break;
			}
			$rawImageData .= $buffer;
		} while (true);
		fclose($fp);
		$phpThumb->setSourceData($rawImageData, urlencode($phpThumb->src));

	} else {

		$fopen_error = strip_tags(ob_get_contents());
		ob_end_clean();
		if (ini_get('allow_url_fopen')) {
			$phpThumb->ErrorImage('cannot open "'.$HTTPurl.'" - fopen() said: "'.$fopen_error.'"');
		} else {
			$phpThumb->ErrorImage('"allow_url_fopen" disabled');
		}

	}
	ob_end_clean();

}

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[7]', __FILE__, __LINE__);
if (@$_GET['phpThumbDebug'] == '7') {
	$phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

$phpThumb->GenerateThumbnail();

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[8]', __FILE__, __LINE__);
if (@$_GET['phpThumbDebug'] == '8') {
	$phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

if ($phpThumb->config_allow_parameter_file && $phpThumb->file) {

	$phpThumb->RenderToFile($phpThumb->ResolveFilenameToAbsolute($phpThumb->file));
	if ($phpThumb->config_allow_parameter_goto && $phpThumb->goto && eregi('^(f|ht)tps?://', $phpThumb->goto)) {
		// redirect to another URL after image has been rendered to file
		header('Location: '.$phpThumb->goto);
		exit;
	}

} else {

	if ((file_exists($phpThumb->cache_filename) && is_writable($phpThumb->cache_filename)) || is_writable(dirname($phpThumb->cache_filename))) {

		$phpThumb->CleanUpCacheDirectory();
		if ($phpThumb->RenderToFile($phpThumb->cache_filename)) {
			chmod($phpThumb->cache_filename, 0644);
			RedirectToCachedFile();
		} else {
			$phpThumb->DebugMessage('Failed: RenderToFile('.$phpThumb->cache_filename.')', __FILE__, __LINE__);
		}

	} else {

		$phpThumb->DebugMessage('Cannot write to $phpThumb->cache_filename ('.$phpThumb->cache_filename.') because that directory ('.dirname($phpThumb->cache_filename).') is not writable', __FILE__, __LINE__);

	}

}

////////////////////////////////////////////////////////////////
// Debug output, to try and help me diagnose problems
$phpThumb->DebugTimingMessage('phpThumbDebug[9]', __FILE__, __LINE__);
if (@$_GET['phpThumbDebug'] == '9') {
	$phpThumb->phpThumbDebug();
}
////////////////////////////////////////////////////////////////

$phpThumb->OutputThumbnail();

?>