Attribute Macro send_once 

#[send_once]

Sends the complete response exactly once after function execution.

This attribute macro ensures that the response is sent exactly once to the client, preventing multiple response transmissions for single-use scenarios.

Usage

use hyperlane::*;
use hyperlane_macros::*;

#[send_once]
async fn send_once_handler(ctx: Context) {
    let _ = ctx.set_response_body("One-time response").await;
    // Response is sent exactly once after function returns
}

The macro takes no parameters and should be applied directly to async functions that accept a Context parameter.