Can get room avatar

matrixgw_backend/src/controllers/matrix/matrix_room_controller.rs

@@ -1,6 +1,7 @@
 use crate::controllers::HttpResult;
+use crate::controllers::matrix::media_controller;
 use crate::extractors::matrix_client_extractor::MatrixClientExtractor;
-use actix_web::{HttpResponse, web};
+use actix_web::{HttpRequest, HttpResponse, web};
 use futures_util::{StreamExt, stream};
 use matrix_sdk::ruma::{OwnedRoomId, OwnedUserId};
 use matrix_sdk::{Room, RoomMemberships};
@@ -56,3 +57,20 @@ pub async fn single_room_info(
         Some(r) => HttpResponse::Ok().json(APIRoomInfo::from_room(&r).await?),
     })
 }
+
+/// Get room avatar
+pub async fn room_avatar(
+    req: HttpRequest,
+    client: MatrixClientExtractor,
+    path: web::Path<RoomIdInPath>,
+) -> HttpResult {
+    let Some(room) = client.client.client.get_room(&path.id) else {
+        return Ok(HttpResponse::NotFound().json("Room not found"));
+    };
+
+    let Some(uri) = room.avatar_url() else {
+        return Ok(HttpResponse::NotFound().json("Room has no avatar"));
+    };
+
+    media_controller::serve_media(req, uri).await
+}

matrixgw_backend/src/controllers/matrix/media_controller.rs

@@ -0,0 +1,57 @@
+use crate::controllers::HttpResult;
+use crate::extractors::matrix_client_extractor::MatrixClientExtractor;
+use crate::utils::crypt_utils::sha512;
+use actix_web::dev::Payload;
+use actix_web::http::header;
+use actix_web::{FromRequest, HttpRequest, HttpResponse, web};
+use matrix_sdk::media::{MediaFormat, MediaRequestParameters, MediaThumbnailSettings};
+use matrix_sdk::ruma::events::room::MediaSource;
+use matrix_sdk::ruma::{OwnedMxcUri, UInt};
+
+#[derive(serde::Deserialize)]
+struct MediaQuery {
+    #[serde(default)]
+    thumbnail: bool,
+}
+
+/// Serve a media file
+pub async fn serve_media(req: HttpRequest, media: OwnedMxcUri) -> HttpResult {
+    let query = web::Query::<MediaQuery>::from_request(&req, &mut Payload::None).await?;
+    let client = MatrixClientExtractor::from_request(&req, &mut Payload::None).await?;
+
+    let media = client
+        .client
+        .client
+        .media()
+        .get_media_content(
+            &MediaRequestParameters {
+                source: MediaSource::Plain(media),
+                format: match query.thumbnail {
+                    true => MediaFormat::Thumbnail(MediaThumbnailSettings::new(
+                        UInt::new(100).unwrap(),
+                        UInt::new(100).unwrap(),
+                    )),
+                    false => MediaFormat::File,
+                },
+            },
+            true,
+        )
+        .await?;
+
+    let digest = sha512(&media);
+
+    let mime_type = infer::get(&media).map(|x| x.mime_type());
+
+    // Check if the browser already knows the etag
+    if let Some(c) = req.headers().get(header::IF_NONE_MATCH)
+        && c.to_str().unwrap_or("") == digest
+    {
+        return Ok(HttpResponse::NotModified().finish());
+    }
+
+    Ok(HttpResponse::Ok()
+        .content_type(mime_type.unwrap_or("application/octet-stream"))
+        .insert_header(("etag", digest))
+        .insert_header(("cache-control", "max-age=360000"))
+        .body(media))
+}

matrixgw_backend/src/controllers/matrix/mod.rs

@@ -1 +1,2 @@
 pub mod matrix_room_controller;
+pub mod media_controller;