Function serialize_url_safe 

pub fn serialize_url_safe<S, T>(
    to_serialize: &Option<T>,
    serializer: S,
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>
where
    S: Serializer,
    T: AsRef<[u8]>,

Helper that can be used in a serde serialize_with derive macro for struct fields that contain base64 encoded data.

Uses the URL safe base64 encoder.

Examples

#[derive(Serialize)]
struct SomeType {
    #[serde(serialize_with = "base64::option::serialize_url_safe")]
    pub value: Option<Vec<u8>>,
}