Martina simicic
simicic
/ facebook_signed_request.rb
Created
June 29, 2020 11:41
Ruby: Validating facebook signed request signature
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| def base64_url_decode(encoded_string) | |
| encoded_str = encoded_string.tr('-_', '+/') | |
| encoded_str += '=' while !(encoded_str.size % 4).zero? | |
| Base64.decode64(encoded_str) | |
| end | |
| encoded_signature, encoded_data = signed_request.split('.', 2) | |
| signature = base64_url_decode(encoded_signature) |