local last_modified = os_date('!%a, %d %b %Y %H:%M:%S GMT', attr.modification);
response_headers.last_modified = last_modified;
- local etag = ("%02x-%x-%x-%x"):format(attr.dev or 0, attr.ino or 0, attr.size or 0, attr.modification or 0);
+ local etag = ('"%02x-%x-%x-%x"'):format(attr.dev or 0, attr.ino or 0, attr.size or 0, attr.modification or 0);
response_headers.etag = etag;
local if_none_match = request_headers.if_none_match