5 header::{HeaderName, ACCEPT_ENCODING, HOST},
14 use futures::stream::{Stream, StreamExt};
15 use lemmy_utils::{claims::Claims, error::LemmyError, rate_limit::RateLimit};
16 use lemmy_websocket::LemmyContext;
18 use reqwest_middleware::{ClientWithMiddleware, RequestBuilder};
19 use serde::{Deserialize, Serialize};
21 pub fn config(cfg: &mut web::ServiceConfig, client: ClientWithMiddleware, rate_limit: &RateLimit) {
23 .app_data(web::Data::new(client))
25 web::resource("/pictrs/image")
26 .wrap(rate_limit.image())
27 .route(web::post().to(upload)),
29 // This has optional query params: /image/{filename}?format=jpg&thumbnail=256
30 .service(web::resource("/pictrs/image/{filename}").route(web::get().to(full_res)))
31 .service(web::resource("/pictrs/image/delete/{token}/{filename}").route(web::get().to(delete)));
34 #[derive(Debug, Serialize, Deserialize)]
40 #[derive(Debug, Serialize, Deserialize)]
43 files: Option<Vec<Image>>,
46 #[derive(Deserialize)]
48 format: Option<String>,
49 thumbnail: Option<String>,
53 request: &HttpRequest,
54 client: &ClientWithMiddleware,
57 // remove accept-encoding header so that pictrs doesnt compress the response
58 const INVALID_HEADERS: &[HeaderName] = &[ACCEPT_ENCODING, HOST];
60 let client_request = client.request(request.method().clone(), url);
65 .fold(client_request, |client_req, (key, value)| {
66 if INVALID_HEADERS.contains(key) {
69 client_req.header(key, value)
77 client: web::Data<ClientWithMiddleware>,
78 context: web::Data<LemmyContext>,
79 ) -> Result<HttpResponse, Error> {
80 // TODO: check rate limit here
83 .expect("No auth header for picture upload");
85 if Claims::decode(jwt.value(), &context.secret().jwt_secret).is_err() {
86 return Ok(HttpResponse::Unauthorized().finish());
89 let image_url = format!("{}/image", pictrs_url(context.settings().pictrs_url)?);
91 let mut client_req = adapt_request(&req, &client, image_url);
93 if let Some(addr) = req.head().peer_addr {
94 client_req = client_req.header("X-Forwarded-For", addr.to_string())
98 .body(Body::wrap_stream(make_send(body)))
101 .map_err(error::ErrorBadRequest)?;
103 let status = res.status();
104 let images = res.json::<Images>().await.map_err(error::ErrorBadRequest)?;
106 Ok(HttpResponse::build(status).json(images))
110 filename: web::Path<String>,
111 web::Query(params): web::Query<PictrsParams>,
113 client: web::Data<ClientWithMiddleware>,
114 context: web::Data<LemmyContext>,
115 ) -> Result<HttpResponse, Error> {
116 let name = &filename.into_inner();
118 // If there are no query params, the URL is original
119 let pictrs_url_settings = context.settings().pictrs_url;
120 let url = if params.format.is_none() && params.thumbnail.is_none() {
122 "{}/image/original/{}",
123 pictrs_url(pictrs_url_settings)?,
127 // Use jpg as a default when none is given
128 let format = params.format.unwrap_or_else(|| "jpg".to_string());
130 let mut url = format!(
131 "{}/image/process.{}?src={}",
132 pictrs_url(pictrs_url_settings)?,
137 if let Some(size) = params.thumbnail {
138 url = format!("{}&thumbnail={}", url, size,);
143 image(url, req, client).await
149 client: web::Data<ClientWithMiddleware>,
150 ) -> Result<HttpResponse, Error> {
151 let mut client_req = adapt_request(&req, &client, url);
153 if let Some(addr) = req.head().peer_addr {
154 client_req = client_req.header("X-Forwarded-For", addr.to_string());
157 if let Some(addr) = req.head().peer_addr {
158 client_req = client_req.header("X-Forwarded-For", addr.to_string());
161 let res = client_req.send().await.map_err(error::ErrorBadRequest)?;
163 if res.status() == StatusCode::NOT_FOUND {
164 return Ok(HttpResponse::NotFound().finish());
167 let mut client_res = HttpResponse::build(res.status());
169 for (name, value) in res.headers().iter().filter(|(h, _)| *h != "connection") {
170 client_res.insert_header((name.clone(), value.clone()));
173 Ok(client_res.body(BodyStream::new(res.bytes_stream())))
177 components: web::Path<(String, String)>,
179 client: web::Data<ClientWithMiddleware>,
180 context: web::Data<LemmyContext>,
181 ) -> Result<HttpResponse, Error> {
182 let (token, file) = components.into_inner();
185 "{}/image/delete/{}/{}",
186 pictrs_url(context.settings().pictrs_url)?,
191 let mut client_req = adapt_request(&req, &client, url);
193 if let Some(addr) = req.head().peer_addr {
194 client_req = client_req.header("X-Forwarded-For", addr.to_string());
197 let res = client_req.send().await.map_err(error::ErrorBadRequest)?;
199 Ok(HttpResponse::build(res.status()).body(BodyStream::new(res.bytes_stream())))
202 fn pictrs_url(pictrs_url: Option<String>) -> Result<String, LemmyError> {
203 pictrs_url.ok_or_else(|| anyhow!("images_disabled").into())
206 fn make_send<S>(mut stream: S) -> impl Stream<Item = S::Item> + Send + Unpin + 'static
208 S: Stream + Unpin + 'static,
211 // NOTE: the 8 here is arbitrary
212 let (tx, rx) = tokio::sync::mpsc::channel(8);
214 // NOTE: spawning stream into a new task can potentially hit this bug:
215 // - https://github.com/actix/actix-web/issues/1679
217 // Since 4.0.0-beta.2 this issue is incredibly less frequent. I have not personally reproduced it.
218 // That said, it is still technically possible to encounter.
219 actix_web::rt::spawn(async move {
220 while let Some(res) = stream.next().await {
221 if tx.send(res).await.is_err() {
230 struct SendStream<T> {
231 rx: tokio::sync::mpsc::Receiver<T>,
234 impl<T> Stream for SendStream<T>
241 mut self: std::pin::Pin<&mut Self>,
242 cx: &mut std::task::Context<'_>,
243 ) -> std::task::Poll<Option<Self::Item>> {
244 std::pin::Pin::new(&mut self.rx).poll_recv(cx)