Verificación de secret key.
curl -X POST https://www.google.com/recaptcha/api/siteverify -H '"Content-Type", "application/x-www-form-urlencoded; charset=utf-8"' -d "secret=<secret-key>&response=test"
Secret key no válida.
{
"success": false,
"error-codes": [
"invalid-input-secret"
]
}
Secret key válida.
{
"success": false,
"error-codes": [
"invalid-input-response"
]
}
Expresión regular.