jamiejones/real-time — comment on commit a6bc9eba64b0f93630bf6e6c2955b5b1ae7fe2da
File:  line 0
By nisc:

This commit implements a check for:

> With every response, Facebook sends the X-Hub-Signature HTTP header which contains the SHA1 signature over the response payload, using the application secret as the key - for example: 'X-Hub-Signature: sha1=12345...'. The consumer can verify the signature to validate the integrity of the payload.

See: https://developers.facebook.com/docs/reference/api/realtime/