ogcapi-services 0.3.0

use anyhow::Context;
use axum::{
    extract::{FromRequestParts, OriginalUri},
    http::{StatusCode, request::Parts},
};
use axum_extra::extract::Host;
use url::Url;

use crate::Error;

/// Extractor for the remote URL
pub(crate) struct RemoteUrl(pub Url);

impl<S> FromRequestParts<S> for RemoteUrl
where
    S: Send + Sync,
{
    type Rejection = Error;

    async fn from_request_parts(parts: &mut Parts, state: &S) -> Result<Self, Self::Rejection> {
        let uri = OriginalUri::from_request_parts(parts, state).await.unwrap();

        let url = if uri.0.scheme().is_some() {
            uri.0.to_string()
        } else {
            let host = Host::from_request_parts(parts, state)
                .await
                .context("Unabe to extract host")?;

            let proto = parts
                .headers
                .get("X-Forwarded-Proto")
                .and_then(|f| f.to_str().ok())
                .unwrap_or("http");

            format!("{}://{}{}", proto, host.0, uri.0)
        };

        Ok(RemoteUrl(Url::parse(&url)?))
    }
}

/// Extractor that deserializes query strings into some type `T` with [`serde_qs`]
pub(crate) struct Qs<T>(pub(crate) T);

impl<S, T> FromRequestParts<S> for Qs<T>
where
    S: Send + Sync,
    T: serde::de::DeserializeOwned,
{
    type Rejection = Error;

    async fn from_request_parts(parts: &mut Parts, _: &S) -> Result<Self, Self::Rejection> {
        let qs = parts.uri.query().unwrap_or("");
        match serde_qs::from_str(qs) {
            Ok(query) => Ok(Self(query)),
            Err(e) => Err(Error::Exception(StatusCode::BAD_REQUEST, e.to_string())),
        }
    }
}