Add file download link in files page

lib/ui/api.ts

@@ -457,6 +457,36 @@ for (const [resource, flags] of Object.entries(resources)) {
   }
 }
 
+router.get("/blob/files/:id", async (ctx) => {
+  const authorizer: Authorizer = ctx.state.authorizer;
+  const resource = "files";
+  const id = ctx.params.id;
+
+  const log = {
+    message: `Download ${resource}`,
+    context: ctx,
+    id: id,
+  };
+
+  const filter = and(authorizer.getFilter(resource, 2), [
+    "=",
+    ["PARAM", RESOURCE_IDS[resource]],
+    ctx.params.id,
+  ]);
+
+  if (!authorizer.hasAccess(resource, 2)) {
+    logUnauthorizedWarning(log);
+    return void (ctx.status = 403);
+  }
+
+  const count = await db.count(resource, filter);
+  if (!count) return void (ctx.status = 404);
+
+  logger.accessInfo(log);
+  ctx.body = db.downloadFile(id);
+  ctx.attachment(id);
+});
+
 router.put("/files/:id", async (ctx) => {
   const authorizer: Authorizer = ctx.state.authorizer;
   const resource = "files";

lib/ui/db.ts

@@ -315,6 +315,11 @@ export function deleteUser(id: string): Promise<void> {
   return deleteResource("users", id);
 }
 
+export function downloadFile(filename: string): Readable {
+  const bucket = new GridFSBucket(db);
+  return bucket.openDownloadStreamByName(filename);
+}
+
 export function putFile(
   filename: string,
   metadata: Record<string, string>,

ui/files-page.ts

@@ -212,6 +212,9 @@ export const component: ClosureComponent = (): Component => {
       attrs["sortAttributes"] = sortAttributes;
       attrs["onSortChange"] = onSortChange;
       attrs["downloadUrl"] = downloadUrl;
+      attrs["recordActionsCallback"] = (file) => {
+        return [m("a", { href: "api/blob/files/" + file["_id"] }, "Download")];
+      };
 
       if (window.authorizer.hasAccess("files", 3)) {
         attrs["actionsCallback"] = (selected: Set<string>): Children => {