277 lines
11 KiB
Rust
277 lines
11 KiB
Rust
use anyhow::Result;
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use http_body_util::combinators::{UnsyncBoxBody, BoxBody};
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use hyper::body::Incoming;
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use hyper::{Request, Response, body::Bytes};
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use http_body_util::BodyStream;
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use http_body_util::StreamBody;
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use hyper::body::Frame;
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use futures::stream::{StreamExt, TryStreamExt};
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use aero_collections::user::User;
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use aero_dav::types as dav;
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use aero_dav::realization::All;
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use aero_dav::caltypes as cal;
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use crate::dav::codec::{serialize, deserialize, depth, text_body};
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use crate::dav::node::{DavNode, PutPolicy};
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use crate::dav::resource::RootNode;
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use crate::dav::codec;
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pub(super) type ArcUser = std::sync::Arc<User>;
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pub(super) type HttpResponse = Response<UnsyncBoxBody<Bytes, std::io::Error>>;
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const ALLPROP: [dav::PropertyRequest<All>; 10] = [
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dav::PropertyRequest::CreationDate,
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dav::PropertyRequest::DisplayName,
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dav::PropertyRequest::GetContentLanguage,
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dav::PropertyRequest::GetContentLength,
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dav::PropertyRequest::GetContentType,
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dav::PropertyRequest::GetEtag,
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dav::PropertyRequest::GetLastModified,
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dav::PropertyRequest::LockDiscovery,
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dav::PropertyRequest::ResourceType,
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dav::PropertyRequest::SupportedLock,
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];
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pub(crate) struct Controller {
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node: Box<dyn DavNode>,
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user: std::sync::Arc<User>,
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req: Request<Incoming>,
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}
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impl Controller {
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pub(crate) async fn route(user: std::sync::Arc<User>, req: Request<Incoming>) -> Result<HttpResponse> {
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let path = req.uri().path().to_string();
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let path_segments: Vec<_> = path.split("/").filter(|s| *s != "").collect();
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let method = req.method().as_str().to_uppercase();
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let can_create = matches!(method.as_str(), "PUT" | "MKCOL" | "MKCALENDAR");
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let node = match (RootNode {}).fetch(&user, &path_segments, can_create).await{
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Ok(v) => v,
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Err(e) => {
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tracing::warn!(err=?e, "dav node fetch failed");
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return Ok(Response::builder()
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.status(404)
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.body(codec::text_body("Resource not found"))?)
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}
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};
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let ctrl = Self { node, user, req };
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match method.as_str() {
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"OPTIONS" => Ok(Response::builder()
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.status(200)
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.header("DAV", "1")
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.header("Allow", "HEAD,GET,PUT,OPTIONS,DELETE,PROPFIND,PROPPATCH,MKCOL,COPY,MOVE,LOCK,UNLOCK,MKCALENDAR,REPORT")
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.body(codec::text_body(""))?),
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"HEAD" => {
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tracing::warn!("HEAD not correctly implemented");
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Ok(Response::builder()
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.status(404)
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.body(codec::text_body(""))?)
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},
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"GET" => ctrl.get().await,
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"PUT" => ctrl.put().await,
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"DELETE" => ctrl.delete().await,
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"PROPFIND" => ctrl.propfind().await,
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"REPORT" => ctrl.report().await,
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_ => Ok(Response::builder()
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.status(501)
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.body(codec::text_body("HTTP Method not implemented"))?),
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}
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}
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// --- Per-method functions ---
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/// REPORT has been first described in the "Versioning Extension" of WebDAV
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/// It allows more complex queries compared to PROPFIND
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///
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/// Note: current implementation is not generic at all, it is heavily tied to CalDAV.
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/// A rewrite would be required to make it more generic (with the extension system that has
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/// been introduced in aero-dav)
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async fn report(self) -> Result<HttpResponse> {
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let status = hyper::StatusCode::from_u16(207)?;
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let report = match deserialize::<cal::Report<All>>(self.req).await {
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Ok(v) => v,
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Err(e) => {
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tracing::error!(err=?e, "unable to decode REPORT body");
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return Ok(Response::builder()
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.status(400)
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.body(text_body("Bad request"))?)
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}
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};
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// Multiget is really like a propfind where Depth: 0|1|Infinity is replaced by an arbitrary
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// list of URLs
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let multiget = match report {
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cal::Report::Multiget(m) => m,
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_ => return Ok(Response::builder()
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.status(501)
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.body(text_body("Not implemented"))?),
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};
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// Getting the list of nodes
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let (mut ok_node, mut not_found) = (Vec::new(), Vec::new());
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for h in multiget.href.into_iter() {
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let maybe_collected_node = match Path::new(h.0.as_str()) {
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Ok(Path::Abs(p)) => RootNode{}.fetch(&self.user, p.as_slice(), false).await.or(Err(h)),
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Ok(Path::Rel(p)) => self.node.fetch(&self.user, p.as_slice(), false).await.or(Err(h)),
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Err(_) => Err(h),
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};
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match maybe_collected_node {
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Ok(v) => ok_node.push(v),
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Err(h) => not_found.push(h),
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};
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}
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// Getting props
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let props = match multiget.selector {
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None | Some(cal::CalendarSelector::AllProp) => Some(dav::PropName(ALLPROP.to_vec())),
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Some(cal::CalendarSelector::PropName) => None,
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Some(cal::CalendarSelector::Prop(inner)) => Some(inner),
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};
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serialize(status, Self::multistatus(&self.user, ok_node, not_found, props).await)
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}
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/// PROPFIND is the standard way to fetch WebDAV properties
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async fn propfind(self) -> Result<HttpResponse> {
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let depth = depth(&self.req);
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if matches!(depth, dav::Depth::Infinity) {
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return Ok(Response::builder()
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.status(501)
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.body(text_body("Depth: Infinity not implemented"))?)
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}
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let status = hyper::StatusCode::from_u16(207)?;
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// A client may choose not to submit a request body. An empty PROPFIND
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// request body MUST be treated as if it were an 'allprop' request.
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// @FIXME here we handle any invalid data as an allprop, an empty request is thus correctly
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// handled, but corrupted requests are also silently handled as allprop.
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let propfind = deserialize::<dav::PropFind<All>>(self.req).await.unwrap_or_else(|_| dav::PropFind::<All>::AllProp(None));
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tracing::debug!(recv=?propfind, "inferred propfind request");
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// Collect nodes as PROPFIND is not limited to the targeted node
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let mut nodes = vec![];
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if matches!(depth, dav::Depth::One | dav::Depth::Infinity) {
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nodes.extend(self.node.children(&self.user).await);
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}
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nodes.push(self.node);
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// Expand properties request
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let propname = match propfind {
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dav::PropFind::PropName => None,
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dav::PropFind::AllProp(None) => Some(dav::PropName(ALLPROP.to_vec())),
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dav::PropFind::AllProp(Some(dav::Include(mut include))) => {
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include.extend_from_slice(&ALLPROP);
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Some(dav::PropName(include))
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},
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dav::PropFind::Prop(inner) => Some(inner),
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};
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// Not Found is currently impossible considering the way we designed this function
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let not_found = vec![];
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serialize(status, Self::multistatus(&self.user, nodes, not_found, propname).await)
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}
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async fn put(self) -> Result<HttpResponse> {
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let put_policy = codec::put_policy(&self.req)?;
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let stream_of_frames = BodyStream::new(self.req.into_body());
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let stream_of_bytes = stream_of_frames
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.map_ok(|frame| frame.into_data())
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.map(|obj| match obj {
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Ok(Ok(v)) => Ok(v),
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Ok(Err(_)) => Err(std::io::Error::new(std::io::ErrorKind::Other, "conversion error")),
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Err(err) => Err(std::io::Error::new(std::io::ErrorKind::Other, err)),
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}).boxed();
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let etag = self.node.put(put_policy, stream_of_bytes).await?;
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let response = Response::builder()
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.status(201)
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.header("ETag", etag)
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//.header("content-type", "application/xml; charset=\"utf-8\"")
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.body(text_body(""))?;
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Ok(response)
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}
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async fn get(self) -> Result<HttpResponse> {
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let stream_body = StreamBody::new(self.node.content().map_ok(|v| Frame::data(v)));
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let boxed_body = UnsyncBoxBody::new(stream_body);
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let mut builder = Response::builder().status(200);
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builder = builder.header("content-type", self.node.content_type());
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if let Some(etag) = self.node.etag().await {
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builder = builder.header("etag", etag);
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}
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let response = builder.body(boxed_body)?;
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Ok(response)
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}
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async fn delete(self) -> Result<HttpResponse> {
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self.node.delete().await?;
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let response = Response::builder()
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.status(204)
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//.header("content-type", "application/xml; charset=\"utf-8\"")
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.body(text_body(""))?;
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Ok(response)
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}
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// --- Common utility functions ---
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/// Build a multistatus response from a list of DavNodes
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async fn multistatus(user: &ArcUser, nodes: Vec<Box<dyn DavNode>>, not_found: Vec<dav::Href>, props: Option<dav::PropName<All>>) -> dav::Multistatus<All> {
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// Collect properties on existing objects
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let mut responses: Vec<dav::Response<All>> = match props {
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Some(props) => futures::stream::iter(nodes).then(|n| n.response_props(user, props.clone())).collect().await,
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None => nodes.into_iter().map(|n| n.response_propname(user)).collect(),
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};
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// Register not found objects only if relevant
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if !not_found.is_empty() {
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responses.push(dav::Response {
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status_or_propstat: dav::StatusOrPropstat::Status(not_found, dav::Status(hyper::StatusCode::NOT_FOUND)),
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error: None,
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location: None,
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responsedescription: None,
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});
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}
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// Build response
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dav::Multistatus::<All> {
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responses,
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responsedescription: None,
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}
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}
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}
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/// Path is a voluntarily feature limited
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/// compared to the expressiveness of a UNIX path
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/// For example getting parent with ../ is not supported, scheme is not supported, etc.
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/// More complex support could be added later if needed by clients
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enum Path<'a> {
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Abs(Vec<&'a str>),
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Rel(Vec<&'a str>),
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}
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impl<'a> Path<'a> {
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fn new(path: &'a str) -> Result<Self> {
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// This check is naive, it does not aim at detecting all fully qualified
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// URL or protect from any attack, its only goal is to help debugging.
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if path.starts_with("http://") || path.starts_with("https://") {
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anyhow::bail!("Full URL are not supported")
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}
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let path_segments: Vec<_> = path.split("/").filter(|s| *s != "" && *s != ".").collect();
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if path.starts_with("/") {
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return Ok(Path::Abs(path_segments))
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}
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Ok(Path::Rel(path_segments))
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}
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}
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