claunia/qemudb
Archived
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Report last modified header information for application images. This should reduce the bandwidth used when refreshing the main page multiple times. Patch based on David Lamberts patch

Browse Source
This commit is contained in:
Chris Morgan
2005-07-31 03:35:44 +00:00
committed by WineHQ
parent 4be7e90e66
commit abdb3ef22b
1 changed files with 68 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

72
appimage.php
View File

@@ -6,14 +6,78 @@
include("path.php");
require(BASE."include/"."incl.php");
require(BASE."include/"."screenshot.php");
/* an image doesn't have a link, so a cookie makes no sense */
header("Set-Cookie: ");
header("Pragma: ");
if(!$_SESSION['current']->hasPriv("admin") && $_REQUEST['queued'])
{
errorpage("Insufficient privileges.");
exit;
errorpage("Insufficient privileges.");
exit;
}
$oScreenshot = new screenshot($_REQUEST['id'],$_REQUEST['queued']);
if ($_REQUEST['REQUEST_METHOD']='HEAD')
{
/* WARNING! optimization of logic in include/screenshots.php */
if (sscanf($_REQUEST['id'],"%d", &$iId) < 1)
{
errorpage("Bad parameter");
exit;
}
$sQuery = "SELECT id FROM appData
WHERE id = ".$iId."
AND type = 'image' LIMIT 1";
if (!($hResult = query_appdb($sQuery) &&
$fImage = fopen(appdb_fullpath("data/screenshots/".$iId), "rb")))
{
header("404 No such image");
exit;
}
$fstat_val = fstat($fImage);
$iModTime = $fstat_val['mtime'];
$sMagic = fread($fImage,8);
fclose($fImage); /* don't leave the fopened image open */
/* identify what kind of image this is, if we can't identify it */
/* we should report that its a bad image */
if (strcmp("\x89PNG\r\n\x1A\n",$sMagic)==0)
{
header("Content-Type: image/png");
} else if (preg_match("^\xD8\xFF^",$sMagic)) {
header("Content-Type: image/jpeg");
} else {
header("500 Bad image format");
exit;
}
header("Cache-Control: public");
header("Expires: ");
header("Last-Modified: ".fHttpDate($iModTime));
}
$oScreenshot = new Screenshot($_REQUEST['id']);
/* at this point, we know that .../screenshots/$id and
* .../screenshots/thumbnails/$id both exist as normally
* they would both be created at the same time. */
$fstat_val = stat(appdb_fullpath("data/screenshots/".$_REQUEST['id']));
$iModTime = $fstat_val['mtime'];
header("Cache-Control: public");
header("Expires: ");
/* if the browser is asking if the file was modified since a particular date */
/* and the date is the same that the file was modified, then we can report */
/* that the file wasn't modified, the browser can used the cached image */
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) &&
$iModTime == pHttpDate($_SERVER['HTTP_IF_MODIFIED_SINCE']))
{
header("HTTP/1.0 304 Not Modified");
exit;
}
header("Last-Modified: ".fHttpDate($iModTime));
if(!$_REQUEST['thumbnail'])
$oScreenshot->oScreenshotImage->output_to_browser(1);
else
$oScreenshot->oThumbnailImage->output_to_browser(1);
?>
?>