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use crate::{Error, Additional, Extractor, http::Request};
use serde::de::DeserializeOwned;
use std::sync::Arc;
use std::ops::{Deref, DerefMut};
pub struct Json<J>(pub J);
impl<J> Json<J> {
pub fn into_inner(self) -> J {
self.0
}
}
impl<T: Sync, J: 'static + DeserializeOwned + Send + Sync> Extractor<T> for Json<J> {
fn extract(req: &Request, _additional: Arc<Additional<T>>) -> Result<Self, Error> {
let content_type_header = req.headers.get("content-type").or_else(|| req.headers.get("Content-Type"));
if let Some(content_type_header) = content_type_header {
if content_type_header == "application/json" {
match String::from_utf8(req.content.clone()) {
Ok(body) => {
serde_json::from_str::<J>(&body)
.map(|j| Json(j))
.map_err(|e| Error::ExtractionBR(format!("json deserialization failure, {}", e)))
},
Err(e) => {
Err(Error::ExtractionBR(format!("body encoding error, {}", e)))
}
}
} else {
Err(Error::ExtractionBR(format!("content-type header should be 'application/json' (found {}) for correct parsing", content_type_header)))
}
} else {
Err(Error::ExtractionBR(format!("missing header content-type (or Content-Type) required for json parsing")))
}
}
}
impl<J> Deref for Json<J> {
type Target = J;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl<J> DerefMut for Json<J> {
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}