Attribute Macro request_error_data 

#[request_error_data]

Extracts request error data into a variable with panic on missing value.

This attribute macro retrieves request error information if an error occurred during handling and makes it available as a variable. If no error data exists, the function will panic with an error message.

Usage

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

#[route("/request_error_data")]
struct RequestErrorDataTest;

impl ServerHook for RequestErrorDataTest {
    async fn new(_ctx: &Context) -> Self {
        Self
    }

    #[response_body(&format!("Request error data: {request_error_data}"))]
    #[request_error_data(request_error_data)]
    async fn handle(self, ctx: &Context) {}
}

impl RequestErrorDataTest {
    #[request_error_data(request_error_data)]
    async fn request_error_data_with_ref_self(&self, ctx: &Context) {}
}

#[request_error_data(request_error_data)]
async fn standalone_request_error_data_handler(ctx: &Context) {}

The macro accepts a variable name that will contain the request error data. The variable will be available as a RequestError in the function scope.

Multi-Parameter Usage

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

#[route("/request_error_data")]
struct MultiRequestErrorData;

impl ServerHook for MultiRequestErrorData {
    async fn new(_ctx: &Context) -> Self {
        Self
    }

    #[response_body(&format!("error1: {error1}, error2: {error2}"))]
    #[request_error_data(error1, error2)]
    async fn handle(self, ctx: &Context) {}
}

The macro accepts multiple variable names separated by commas.

Panics

This macro will panic if no request error data exists in the request context.