2020-04-03 15:27:08 +00:00
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use rocket::{
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data::{FromDataSimple, Outcome},
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http::Status,
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response::Responder,
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Outcome::*,
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Request, State,
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};
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use ruma_api::{
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error::{FromHttpRequestError, FromHttpResponseError},
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Endpoint, Outgoing,
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};
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use ruma_client_api::error::Error;
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use ruma_identifiers::UserId;
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use std::{
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convert::{TryFrom, TryInto},
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io::{Cursor, Read},
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ops::Deref,
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2020-02-15 21:42:21 +00:00
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};
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const MESSAGE_LIMIT: u64 = 65535;
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2020-03-28 22:08:59 +00:00
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/// This struct converts rocket requests into ruma structs by converting them into http requests
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/// first.
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2020-03-29 00:29:47 +00:00
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pub struct Ruma<T: Outgoing> {
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body: T::Incoming,
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2020-03-29 19:05:20 +00:00
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pub user_id: Option<UserId>,
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2020-03-29 22:10:15 +00:00
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pub json_body: serde_json::Value,
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2020-03-28 17:50:02 +00:00
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}
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2020-03-28 22:08:59 +00:00
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2020-03-29 00:29:47 +00:00
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impl<T: Endpoint> FromDataSimple for Ruma<T>
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2020-02-18 21:07:57 +00:00
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where
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2020-03-29 00:29:47 +00:00
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// We need to duplicate Endpoint's where clauses because the compiler is not smart enough yet.
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// See https://github.com/rust-lang/rust/issues/54149
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<T as Outgoing>::Incoming: TryFrom<http::Request<Vec<u8>>, Error = FromHttpRequestError>,
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<T::Response as Outgoing>::Incoming: TryFrom<
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http::Response<Vec<u8>>,
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Error = FromHttpResponseError<<T as Endpoint>::ResponseError>,
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>,
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2020-02-18 21:07:57 +00:00
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{
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2020-03-29 19:05:20 +00:00
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type Error = (); // TODO: Better error handling
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2020-02-15 21:42:21 +00:00
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2020-03-28 22:08:59 +00:00
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fn from_data(request: &Request, data: rocket::Data) -> Outcome<Self, Self::Error> {
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2020-03-29 19:05:20 +00:00
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let user_id = if T::METADATA.requires_authentication {
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let data = request.guard::<State<crate::Data>>().unwrap();
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// Get token from header or query value
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let token = match request
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.headers()
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.get_one("Authorization")
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.map(|s| s.to_owned())
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.or_else(|| request.get_query_value("access_token").and_then(|r| r.ok()))
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{
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// TODO: M_MISSING_TOKEN
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None => return Failure((Status::Unauthorized, ())),
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Some(token) => token,
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};
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// Check if token is valid
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match data.user_from_token(&token) {
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// TODO: M_UNKNOWN_TOKEN
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None => return Failure((Status::Unauthorized, ())),
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Some(user_id) => Some(user_id),
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}
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} else {
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None
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};
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2020-02-18 21:07:57 +00:00
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let mut http_request = http::Request::builder()
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.uri(request.uri().to_string())
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.method(&*request.method().to_string());
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2020-02-15 21:42:21 +00:00
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for header in request.headers().iter() {
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http_request = http_request.header(header.name.as_str(), &*header.value);
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}
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2020-02-18 21:07:57 +00:00
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let mut handle = data.open().take(MESSAGE_LIMIT);
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let mut body = Vec::new();
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handle.read_to_end(&mut body).unwrap();
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2020-03-29 22:10:15 +00:00
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let http_request = http_request.body(body.clone()).unwrap();
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2020-02-18 21:07:57 +00:00
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log::info!("{:?}", http_request);
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2020-03-29 22:10:15 +00:00
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2020-03-29 00:29:47 +00:00
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match T::Incoming::try_from(http_request) {
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2020-03-29 22:10:15 +00:00
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Ok(t) => Success(Ruma {
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body: t,
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user_id,
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// TODO: Can we avoid parsing it again?
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2020-04-03 19:17:27 +00:00
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json_body: if !body.is_empty() {
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serde_json::from_slice(&body).expect("Ruma already parsed it successfully")
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} else {
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serde_json::Value::default()
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},
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2020-03-29 22:10:15 +00:00
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}),
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2020-02-18 21:07:57 +00:00
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Err(e) => {
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log::error!("{:?}", e);
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Failure((Status::InternalServerError, ()))
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}
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2020-02-15 21:42:21 +00:00
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}
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}
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}
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2020-03-29 00:29:47 +00:00
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impl<T: Outgoing> Deref for Ruma<T> {
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type Target = T::Incoming;
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2020-02-15 21:42:21 +00:00
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fn deref(&self) -> &Self::Target {
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2020-03-28 17:50:02 +00:00
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&self.body
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}
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}
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2020-03-28 22:08:59 +00:00
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/// This struct converts ruma responses into rocket http responses.
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2020-02-18 21:07:57 +00:00
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pub struct MatrixResult<T>(pub std::result::Result<T, Error>);
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impl<T: TryInto<http::Response<Vec<u8>>>> TryInto<http::Response<Vec<u8>>> for MatrixResult<T> {
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type Error = T::Error;
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fn try_into(self) -> Result<http::Response<Vec<u8>>, T::Error> {
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match self.0 {
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Ok(t) => t.try_into(),
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Err(e) => Ok(e.into()),
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}
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}
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}
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impl<'r, T: TryInto<http::Response<Vec<u8>>>> Responder<'r> for MatrixResult<T> {
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2020-02-15 21:42:21 +00:00
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fn respond_to(self, _: &Request) -> rocket::response::Result<'r> {
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2020-02-18 21:07:57 +00:00
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let http_response: Result<http::Response<_>, _> = self.try_into();
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match http_response {
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2020-02-15 21:42:21 +00:00
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Ok(http_response) => {
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let mut response = rocket::response::Response::build();
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response.sized_body(Cursor::new(http_response.body().clone()));
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for header in http_response.headers() {
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response
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.raw_header(header.0.to_string(), header.1.to_str().unwrap().to_owned());
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}
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2020-03-28 17:50:02 +00:00
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response.raw_header("Access-Control-Allow-Origin", "*");
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response.raw_header(
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"Access-Control-Allow-Methods",
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"GET, POST, PUT, DELETE, OPTIONS",
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);
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response.raw_header(
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"Access-Control-Allow-Headers",
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"Origin, X-Requested-With, Content-Type, Accept, Authorization",
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);
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2020-02-15 21:42:21 +00:00
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response.ok()
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}
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Err(_) => Err(Status::InternalServerError),
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}
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}
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}
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