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#![doc = include_str!("../docs/extract.md")]
use crate::{response::IntoResponse, Error};
use async_trait::async_trait;
use http::{header, Extensions, HeaderMap, Method, Request, Uri, Version};
use rejection::*;
use std::convert::Infallible;
pub mod connect_info;
pub mod extractor_middleware;
pub mod rejection;
#[cfg(feature = "ws")]
#[cfg_attr(docsrs, doc(cfg(feature = "ws")))]
pub mod ws;
mod content_length_limit;
mod extension;
mod form;
mod matched_path;
mod path;
mod query;
mod raw_query;
mod request_parts;
mod tuple;
#[doc(inline)]
#[allow(deprecated)]
pub use self::{
connect_info::ConnectInfo,
content_length_limit::ContentLengthLimit,
extension::Extension,
extractor_middleware::extractor_middleware,
form::Form,
matched_path::MatchedPath,
path::Path,
query::Query,
raw_query::RawQuery,
request_parts::OriginalUri,
request_parts::{BodyStream, RawBody},
};
#[doc(no_inline)]
#[cfg(feature = "json")]
pub use crate::Json;
#[cfg(feature = "multipart")]
#[cfg_attr(docsrs, doc(cfg(feature = "multipart")))]
pub mod multipart;
#[cfg(feature = "multipart")]
#[cfg_attr(docsrs, doc(cfg(feature = "multipart")))]
#[doc(inline)]
pub use self::multipart::Multipart;
#[cfg(feature = "ws")]
#[cfg_attr(docsrs, doc(cfg(feature = "ws")))]
#[doc(inline)]
pub use self::ws::WebSocketUpgrade;
#[cfg(feature = "headers")]
#[cfg_attr(docsrs, doc(cfg(feature = "headers")))]
mod typed_header;
#[cfg(feature = "headers")]
#[cfg_attr(docsrs, doc(cfg(feature = "headers")))]
#[doc(inline)]
pub use self::typed_header::TypedHeader;
#[async_trait]
pub trait FromRequest<B = crate::body::Body>: Sized {
type Rejection: IntoResponse;
async fn from_request(req: &mut RequestParts<B>) -> Result<Self, Self::Rejection>;
}
#[derive(Debug)]
pub struct RequestParts<B = crate::body::Body> {
method: Method,
uri: Uri,
version: Version,
headers: Option<HeaderMap>,
extensions: Option<Extensions>,
body: Option<B>,
}
impl<B> RequestParts<B> {
pub fn new(req: Request<B>) -> Self {
let (
http::request::Parts {
method,
uri,
version,
headers,
extensions,
..
},
body,
) = req.into_parts();
RequestParts {
method,
uri,
version,
headers: Some(headers),
extensions: Some(extensions),
body: Some(body),
}
}
pub fn try_into_request(self) -> Result<Request<B>, Error> {
let Self {
method,
uri,
version,
mut headers,
mut extensions,
mut body,
} = self;
let mut req = if let Some(body) = body.take() {
Request::new(body)
} else {
return Err(Error::new(RequestAlreadyExtracted::BodyAlreadyExtracted(
BodyAlreadyExtracted,
)));
};
*req.method_mut() = method;
*req.uri_mut() = uri;
*req.version_mut() = version;
if let Some(headers) = headers.take() {
*req.headers_mut() = headers;
} else {
return Err(Error::new(
RequestAlreadyExtracted::HeadersAlreadyExtracted(HeadersAlreadyExtracted),
));
}
if let Some(extensions) = extensions.take() {
*req.extensions_mut() = extensions;
} else {
return Err(Error::new(
RequestAlreadyExtracted::ExtensionsAlreadyExtracted(ExtensionsAlreadyExtracted),
));
}
Ok(req)
}
pub fn method(&self) -> &Method {
&self.method
}
pub fn method_mut(&mut self) -> &mut Method {
&mut self.method
}
pub fn uri(&self) -> &Uri {
&self.uri
}
pub fn uri_mut(&mut self) -> &mut Uri {
&mut self.uri
}
pub fn version(&self) -> Version {
self.version
}
pub fn version_mut(&mut self) -> &mut Version {
&mut self.version
}
pub fn headers(&self) -> Option<&HeaderMap> {
self.headers.as_ref()
}
pub fn headers_mut(&mut self) -> Option<&mut HeaderMap> {
self.headers.as_mut()
}
pub fn take_headers(&mut self) -> Option<HeaderMap> {
self.headers.take()
}
pub fn extensions(&self) -> Option<&Extensions> {
self.extensions.as_ref()
}
pub fn extensions_mut(&mut self) -> Option<&mut Extensions> {
self.extensions.as_mut()
}
pub fn take_extensions(&mut self) -> Option<Extensions> {
self.extensions.take()
}
pub fn body(&self) -> Option<&B> {
self.body.as_ref()
}
pub fn body_mut(&mut self) -> Option<&mut B> {
self.body.as_mut()
}
pub fn take_body(&mut self) -> Option<B> {
self.body.take()
}
}
#[async_trait]
impl<T, B> FromRequest<B> for Option<T>
where
T: FromRequest<B>,
B: Send,
{
type Rejection = Infallible;
async fn from_request(req: &mut RequestParts<B>) -> Result<Option<T>, Self::Rejection> {
Ok(T::from_request(req).await.ok())
}
}
#[async_trait]
impl<T, B> FromRequest<B> for Result<T, T::Rejection>
where
T: FromRequest<B>,
B: Send,
{
type Rejection = Infallible;
async fn from_request(req: &mut RequestParts<B>) -> Result<Self, Self::Rejection> {
Ok(T::from_request(req).await)
}
}
pub(crate) fn has_content_type<B>(
req: &RequestParts<B>,
expected_content_type: &str,
) -> Result<bool, HeadersAlreadyExtracted> {
let content_type = if let Some(content_type) = req
.headers()
.ok_or(HeadersAlreadyExtracted)?
.get(header::CONTENT_TYPE)
{
content_type
} else {
return Ok(false);
};
let content_type = if let Ok(content_type) = content_type.to_str() {
content_type
} else {
return Ok(false);
};
Ok(content_type.starts_with(expected_content_type))
}
pub(crate) fn take_body<B>(req: &mut RequestParts<B>) -> Result<B, BodyAlreadyExtracted> {
req.take_body().ok_or(BodyAlreadyExtracted)
}
#[cfg(test)]
mod tests {
use crate::test_helpers::*;
use crate::{routing::get, Router};
#[tokio::test]
async fn consume_body() {
let app = Router::new().route("/", get(|body: String| async { body }));
let client = TestClient::new(app);
let res = client.get("/").body("foo").send().await;
let body = res.text().await;
assert_eq!(body, "foo");
}
}