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use axum::{
extract::{multipart::Multipart, FromRef, Host, Path, State}, response::{IntoResponse, Response}
};
use axum_extra::headers::{ContentLength, HeaderMapExt, HeaderValue, IfNoneMatch};
use axum_extra::TypedHeader;
use kittybox_util::micropub::{Error as MicropubError, ErrorKind as ErrorType};
use kittybox_indieauth::Scope;
use crate::indieauth::{backend::AuthBackend, User};
pub mod storage;
use storage::{MediaStore, MediaStoreError, Metadata, ErrorKind};
pub use storage::file::FileStore;
impl From<MediaStoreError> for MicropubError {
fn from(err: MediaStoreError) -> Self {
Self::new(
ErrorType::InternalServerError,
format!("media store error: {}", err)
)
}
}
#[tracing::instrument(skip(blobstore))]
pub(crate) async fn upload<S: MediaStore, A: AuthBackend>(
State(blobstore): State<S>,
user: User<A>,
mut upload: Multipart
) -> Response {
if !user.check_scope(&Scope::Media) {
return MicropubError::from_static(
ErrorType::NotAuthorized,
"Interacting with the media storage requires the \"media\" scope."
).into_response();
}
let host = user.me.authority();
let field = match upload.next_field().await {
Ok(Some(field)) => field,
Ok(None) => {
return MicropubError::from_static(
ErrorType::InvalidRequest,
"Send multipart/form-data with one field named file"
).into_response();
},
Err(err) => {
return MicropubError::new(
ErrorType::InternalServerError,
format!("Error while parsing multipart/form-data: {}", err)
).into_response();
},
};
let metadata: Metadata = (&field).into();
match blobstore.write_streaming(host, metadata, field).await {
Ok(filename) => IntoResponse::into_response((
axum::http::StatusCode::CREATED,
[
("Location", user.me.join(
&format!(".kittybox/media/uploads/{}", filename)
).unwrap().as_str())
]
)),
Err(err) => MicropubError::from(err).into_response()
}
}
#[tracing::instrument(skip(blobstore))]
pub(crate) async fn serve<S: MediaStore>(
Host(host): Host,
Path(path): Path<String>,
if_none_match: Option<TypedHeader<IfNoneMatch>>,
State(blobstore): State<S>
) -> Response {
use axum::http::StatusCode;
tracing::debug!("Searching for file...");
match blobstore.read_streaming(&host, path.as_str()).await {
Ok((metadata, stream)) => {
tracing::debug!("Metadata: {:?}", metadata);
let etag = if let Some(etag) = metadata.etag {
let etag = format!("\"{}\"", etag).parse::<axum_extra::headers::ETag>().unwrap();
if let Some(TypedHeader(if_none_match)) = if_none_match {
tracing::debug!("If-None-Match: {:?}", if_none_match);
// If-None-Match is a negative precondition that
// returns 304 when it doesn't match because it
// only matches when file is different
if !if_none_match.precondition_passes(&etag) {
return StatusCode::NOT_MODIFIED.into_response()
}
}
Some(etag)
} else { None };
let mut r = Response::builder();
{
let headers = r.headers_mut().unwrap();
headers.insert(
"Content-Type",
HeaderValue::from_str(
metadata.content_type
.as_deref()
.unwrap_or("application/octet-stream")
).unwrap()
);
if let Some(length) = metadata.length {
headers.typed_insert(ContentLength(length.get().try_into().unwrap()));
}
if let Some(etag) = etag {
headers.typed_insert(etag);
}
}
r.body(axum::body::Body::from_stream(stream))
.unwrap()
.into_response()
},
Err(err) => match err.kind() {
ErrorKind::NotFound => {
IntoResponse::into_response(StatusCode::NOT_FOUND)
},
_ => {
tracing::error!("{}", err);
IntoResponse::into_response(StatusCode::INTERNAL_SERVER_ERROR)
}
}
}
}
pub fn router<St, A, M>() -> axum::Router<St> where
A: AuthBackend + FromRef<St>,
M: MediaStore + FromRef<St>,
St: Clone + Send + Sync + 'static
{
axum::Router::new()
.route("/", axum::routing::post(upload::<M, A>))
.route("/uploads/*file", axum::routing::get(serve::<M>))
}
|
