file attachments

1 files changed, 73 insertions, 0 deletions

diff --git a/mod/attach.php b/mod/attach.php
new file mode 100644
index 000000000..3953d3aa1
--- /dev/null
+++ b/mod/attach.php
@@ -0,0 +1,73 @@
+<?php
+
+function attach_init(&$a) {
+
+	if($a->argc != 2) {
+		notice( t('Item not available.') . EOL);
+		return;
+	}
+
+	$item_id = intval($a->argv[1]);
+
+	$r = q("SELECT * FROM `attach` WHERE `id` = %d LIMIT 1",
+		intval($item_id)
+	);
+	if(! count($r)) {
+		notice( t('Item was not found.'). EOL);
+		return;
+	}
+
+	$owner = $r[0]['uid'];
+
+	$sql_extra = " AND `allow_cid` = '' AND `allow_gid` = '' AND `deny_cid` = '' AND `deny_gid` = '' ";
+
+	if(local_user() && ($owner == $_SESSION['uid'])) {
+
+			// Owner can always see his/her photos
+			$sql_extra = ''; 
+
+	}
+	elseif(remote_user()) {
+
+		// authenticated visitor - here lie dragons
+
+		$groups = init_groups_visitor($_SESSION['visitor_id']);
+		$gs = '<<>>'; // should be impossible to match
+		if(count($groups)) {
+			foreach($groups as $g)
+				$gs .= '|<' . intval($g) . '>';
+		} 
+
+		$sql_extra = sprintf(
+			" AND ( `allow_cid` = '' OR `allow_cid` REGEXP '<%d>' ) 
+			  AND ( `deny_cid`  = '' OR  NOT `deny_cid` REGEXP '<%d>' ) 
+			  AND ( `allow_gid` = '' OR `allow_gid` REGEXP '%s' )
+			  AND ( `deny_gid`  = '' OR NOT `deny_gid` REGEXP '%s') ",
+
+			intval($_SESSION['visitor_id']),
+			intval($_SESSION['visitor_id']),
+			dbesc($gs),
+			dbesc($gs)
+		);
+	}
+
+	// Now we'll see if we can access the attachment
+
+	$r = q("SELECT * FROM `attach` WHERE `id` = '%d' $sql_extra LIMIT 1",
+		dbesc($item_id)
+	);
+
+	if(count($r)) {
+		$data = $r[0]['data'];
+	}
+	else {
+		notice( t('Permission denied.') . EOL);
+		return;
+	}
+
+	header('Content-type: ' . $r[0]['filetype']);
+	header('Content-disposition: attachment; filename=' . $r[0]['filename']);
+	echo $data;
+	killme();
+	// NOTREACHED
+}
\ No newline at end of file