@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String attachmentId = req.getParameter("attachment");
String timelineItemId = req.getParameter("timelineItem");
if (attachmentId == null || timelineItemId == null) {
LOG.warning("attempted to load image attachment with missing IDs");
resp.sendError(400);
}
// identify the viewing user
Credential credential = AuthUtil.getCredential(req);
// Get the content type
String contentType =
MirrorClient.getAttachmentContentType(credential, timelineItemId, attachmentId);
// Get the attachment bytes
InputStream attachmentInputStream =
MirrorClient.getAttachmentInputStream(credential, timelineItemId, attachmentId);
// Write it out
resp.setContentType(contentType);
ByteStreams.copy(attachmentInputStream, resp.getOutputStream());
}