Set up some asset retrieval tests.

visions/server/Cargo.toml

@@ -19,5 +19,7 @@ futures = "0.3.31"
 tokio-stream = "0.1.16"
 typeshare = "1.0.4"
 urlencoding = "2.1.3"
-cool_asserts = "2.0.3"
 thiserror = "2.0.3"
+
+[dev-dependencies]
+cool_asserts = "2.0.3"

visions/server/src/asset_db.rs

@@ -4,6 +4,7 @@ use std::{
     io::Read,
 };
 
+use mime::Mime;
 use thiserror::Error;
 
 #[derive(Debug, Error)]
@@ -63,7 +64,7 @@ impl <'a> Iterator for AssetIter<'a> {
 pub trait Assets {
     fn assets<'a>(&'a self) -> AssetIter<'a>;
 
-    fn get(&self, asset_id: AssetId) -> Result<Vec<u8>, Error>;
+    fn get(&self, asset_id: AssetId) -> Result<(Mime, Vec<u8>), Error>;
 }
 
 pub struct FsAssets {
@@ -87,15 +88,16 @@ impl Assets for FsAssets {
         AssetIter(self.assets.iter())
     }
 
-    fn get(&self, asset_id: AssetId) -> Result<Vec<u8>, Error> {
+    fn get(&self, asset_id: AssetId) -> Result<(Mime, Vec<u8>), Error> {
         let path = match self.assets.get(&asset_id) {
             Some(asset) => Ok(asset),
             None => Err(Error::NotFound),
         }?;
+        let mime = mime_guess::from_path(&path).first().unwrap();
         let mut content: Vec<u8> = Vec::new();
         let mut file = std::fs::File::open(&path)?;
         file.read_to_end(&mut content)?;
-        Ok(content)
+        Ok((mime, content))
     }
 }
 
@@ -106,26 +108,38 @@ pub mod mocks {
     use super::*;
 
     pub struct MemoryAssets {
-        assets: HashMap<AssetId, String>,
+        asset_paths: HashMap<AssetId, String>,
+        assets: HashMap<AssetId, Vec<u8>>,
     }
 
     impl MemoryAssets {
-        pub fn new(data: Vec<(AssetId, String)>) -> Self {
-            let mut m = HashMap::new();
-            data.into_iter().for_each(|(asset, path)| {
-                m.insert(asset, path);
+        pub fn new(data: Vec<(AssetId, String, Vec<u8>)>) -> Self {
+            let mut asset_paths = HashMap::new();
+            let mut assets = HashMap::new();
+            data.into_iter().for_each(|(asset, path, data)| {
+                asset_paths.insert(asset.clone(), path);
+                assets.insert(asset, data);
             });
-            Self { assets: m }
+            Self {
+                asset_paths,
+                assets,
+            }
         }
     }
 
     impl Assets for MemoryAssets {
         fn assets<'a>(&'a self) -> AssetIter<'a> {
-            AssetIter(self.assets.iter())
+            AssetIter(self.asset_paths.iter())
         }
 
-        fn get(&self, asset_id: AssetId) -> Result<Vec<u8>, Error> {
-            unimplemented!()
+        fn get(&self, asset_id: AssetId) -> Result<(Mime, Vec<u8>), Error> {
+            match (self.asset_paths.get(&asset_id), self.assets.get(&asset_id)) {
+                (Some(path), Some(data)) => {
+                    let mime = mime_guess::from_path(&path).first().unwrap();
+                    Ok((mime, data.to_vec()))
+                }
+                _ => Err(Error::NotFound),
+            }
         }
     }
 }

visions/server/src/core.rs

@@ -5,6 +5,7 @@ use std::{
     sync::{Arc, RwLock},
 };
 
+use mime::Mime;
 use tokio::sync::mpsc::{unbounded_channel, UnboundedReceiver, UnboundedSender};
 use urlencoding::decode;
 use uuid::Uuid;
@@ -82,13 +83,16 @@ impl Core {
         self.0.read().unwrap().tabletop.clone()
     }
 
-    pub async fn get_asset(&self, asset_id: AssetId) -> Result<Vec<u8>, AppError> {
-        self.0.read().unwrap().asset_db.get(asset_id.clone()).map_err(|err| {
-            match err {
+    pub async fn get_asset(&self, asset_id: AssetId) -> Result<(Mime, Vec<u8>), AppError> {
+        self.0
+            .read()
+            .unwrap()
+            .asset_db
+            .get(asset_id.clone())
+            .map_err(|err| match err {
                 asset_db::Error::NotFound => AppError::NotFound(format!("{}", asset_id)),
                 asset_db::Error::Inaccessible => AppError::Inaccessible(format!("{}", asset_id)),
                 asset_db::Error::UnexpectedError(err) => AppError::Inaccessible(format!("{}", err)),
-            }
             })
     }
 
@@ -132,20 +136,55 @@ impl Core {
 #[cfg(test)]
 mod test {
     use super::*;
+
+    use cool_asserts::assert_matches;
+
     use crate::asset_db::mocks::MemoryAssets;
 
+    fn test_core() -> Core {
+        let assets = MemoryAssets::new(vec![
+            (
+                AssetId::from("asset_1"),
+                "asset_1.png".to_owned(),
+                String::from("abcdefg").into_bytes(),
+            ),
+            (
+                AssetId::from("asset_2"),
+                "asset_2.jpg".to_owned(),
+                String::from("abcdefg").into_bytes(),
+            ),
+            (
+                AssetId::from("asset_3"),
+                "asset_3".to_owned(),
+                String::from("abcdefg").into_bytes(),
+            ),
+            (
+                AssetId::from("asset_4"),
+                "asset_4".to_owned(),
+                String::from("abcdefg").into_bytes(),
+            ),
+            (
+                AssetId::from("asset_5"),
+                "asset_5".to_owned(),
+                String::from("abcdefg").into_bytes(),
+            ),
+        ]);
+        Core::new(assets)
+    }
+
     #[tokio::test]
     async fn it_lists_available_images() {
-        let assets = MemoryAssets::new(vec![
-            (AssetId::from("asset_1"), "asset_1.png".to_owned()),
-            (AssetId::from("asset_2"), "asset_2.jpg".to_owned()),
-            (AssetId::from("asset_3"), "asset_3".to_owned()),
-            (AssetId::from("asset_4"), "asset_4".to_owned()),
-            (AssetId::from("asset_5"), "asset_5".to_owned()),
-        ]);
-        let core = Core::new(assets);
-
+        let core = test_core();
         let image_paths = core.available_images();
         assert_eq!(image_paths.len(), 2);
     }
+
+    #[tokio::test]
+    async fn it_retrieves_an_asset() {
+        let core = test_core();
+        assert_matches!(core.get_asset(AssetId::from("asset_1")).await, Ok((mime, data)) => {
+            assert_eq!(mime.type_(), mime::IMAGE);
+            assert_eq!(data, "abcdefg".as_bytes());
+        });
+    }
 }

visions/server/src/handlers.rs

@@ -49,12 +49,9 @@ where
 
 pub async fn handle_file(core: Core, asset_id: AssetId) -> impl Reply {
     handler(async move {
-        let mimetype = mime_guess::from_path(&format!("{}", asset_id))
-            .first()
-            .unwrap();
-        let bytes = core.get_asset(asset_id).await?;
+        let (mime, bytes) = core.get_asset(asset_id).await?;
         Ok(Response::builder()
-            .header("application-type", mimetype.to_string())
+            .header("application-type", mime.to_string())
             .body(bytes)
             .unwrap())
     })