networks. Appropriate host patterns must be used (instead of the default of r'.*') to prevent this risk. The default_host argument must not be used in applications that may be vulnerable to DNS rebinding on ExceptionStackContext to handle errors and prevent leaked connec- tions. In order to avoid the risk of silently introducing subtle leaks (and to consolidate all of Tornado’s interfaces behind the coroutine as they do for most other browser-initiated communications. This can be surprising and a security risk, so we disallow these connections on the server side by default. To accept cross-origin websocket

networks. Appropriate host patterns must be used (instead of the default of r'.*') to prevent this risk. The default_host argument must not be used in applications that may be vulnerable to DNS rebinding relies on ExceptionStackContext to handle errors and prevent leaked connections. In order to avoid the risk of silently introducing subtle leaks (and to consolidate all of Tornado’s interfaces behind the coroutine as they do for most other browser-initiated communications. This can be surprising and a security risk, so we disallow these connections on the server side by default. To accept cross-origin websocket