Constant ptth_core::PTTH_MAGIC_HEADER

pub const PTTH_MAGIC_HEADER: &str = "X-PTTH-2LJYXWC4";

ptth_server packs its response headers into this request header

This allows the server’s response body to be wrapped verbatim in the request body. The header value is the response’s status code and headers, wrapped in a MessagePack structure, and encoded in base64 to make it ASCII.