Tornado File Download

@plugin.route(r’/question/(\d+)/pdf’) class PartialDocumentHandler(BaseHandler): @gen.coroutine def get(self, *args, **kwargs): question_id, = args qry = yield self.db.execute(“SELECT data FROM question WHERE id=%s”, (question_id,)) data = qry.fetchone() if data: path = data[0][‘path’] abspath = os.path.join(project_root, path) if os.path.isfile(abspath): self.set_header(‘Content-Type’, ‘application/octet-stream’) self.set_header(‘Content-Disposition’, ‘attachment; filename=’ + urllib.parse.quote(os.path.basename(path))) with open(abspath, ‘rb’) as file: while True: data = file.read(64 * 1024) if not data: break try: self.write(data) yield self.flush() except iostream.StreamClosedError: return self.finish() else: self.not_found(‘File Not Found’) else: self.not_found(‘Item Not Found’)