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use crate::{http::Request, Error, additional::Additional};
use std::sync::Arc;
pub trait Extractor<T: Sync>: Send + Sized + 'static {
fn extract(req: &Request, additional: Arc<Additional<T>>) -> Result<Self, Error>;
}
impl<T: Sync> Extractor<T> for Vec<u8> {
fn extract(req: &Request, _additional: Arc<Additional<T>>) -> Result<Self, Error> {
Ok(req.content.clone())
}
}
impl<T: Sync> Extractor<T> for String {
fn extract(req: &Request, _additional: Arc<Additional<T>>) -> Result<Self, Error> {
Ok(String::from_utf8(req.content.clone()).map_err(|e| Error::ExtractionBR(format!("{}", e)))?)
}
}
impl<T: Sync> Extractor<T> for Request {
fn extract(req: &Request, _additional: Arc<Additional<T>>) -> Result<Self, Error> {
Ok(req.clone())
}
}
impl<T: Sync> Extractor<T> for () {
fn extract(_req: &Request, _additional: Arc<Additional<T>>) -> Result<Self, Error> {
Ok(())
}
}
macro_rules! tuple_extractor {
($struct_name:ident) => {
impl<$struct_name, T: Sync> Extractor<T> for ($struct_name,) where $struct_name: Extractor<T> {
fn extract(req: &Request, additional: Arc<Additional<T>>) -> Result<Self, Error> {
Ok(($struct_name::extract(req, additional)?,))
}
}
};
($($struct_name:ident),+) => {
impl<$($struct_name),+, T: Sync> Extractor<T> for ($($struct_name),+) where $($struct_name: Extractor<T>),+ {
fn extract(req: &Request, additional: Arc<Additional<T>>) -> Result<Self, Error> {
Ok(($($struct_name::extract(req, additional.clone())?),+))
}
}
}
}
tuple_extractor!(A);
tuple_extractor!(A, B);
tuple_extractor!(A, B, C);
tuple_extractor!(A, B, C, D);
tuple_extractor!(A, B, C, D, E);
tuple_extractor!(A, B, C, D, E, F);
tuple_extractor!(A, B, C, D, E, F, G);
tuple_extractor!(A, B, C, D, E, F, G, H);