feat: add image fetching

src/server/services/mod.rs

@@ -0,0 +1,30 @@
+use actix_web::{HttpResponse, get, web};
+
+use crate::{consts, server};
+
+// TODO: cache control
+// TODO: etags
+// TODO: canonical redirect for default image and better cache control
+#[get("/image/{username}")]
+pub async fn get_image(
+    data: web::Data<&server::AppState>,
+    username: web::Path<String>,
+) -> HttpResponse {
+    let cached_pfp = data.cache.get_pfp(username.to_string()).await;
+    let (mime, bytes) = cached_pfp.as_ref().map_or_else(
+        || {
+            (
+                consts::DEFAULT_USER_PFP_MIME,
+                web::Bytes::from_static(consts::DEFAULT_USER_PFP),
+            )
+        },
+        |img| {
+            (
+                img.mime.as_ref(),
+                web::Bytes::copy_from_slice(img.bytes.as_ref()),
+            )
+        },
+    );
+
+    HttpResponse::Ok().content_type(mime).body(bytes)
+}