Route for serving pictures

server/route/pictures.js

@@ -0,0 +1,21 @@
+const path = require('path');
+const fs = require('fs');
+const { promisify } = require('util');
+
+const fsStat = promisify(fs.stat);
+const fsReadDir = promisify(fs.readdir);
+
+module.exports = (router) => {
+  router.get('/pictures/:folder', async (ctx) => {
+    const folder = path.resolve(__dirname, `../../pictures/${path.basename(ctx.params.folder)}`);
+    try {
+      await fsStat(folder);
+    } catch (e) {
+      ctx.status = 404;
+      return ctx;
+    }
+    const files = await fsReadDir(folder);
+    ctx.body = files.map(f => `/pictures/${path.basename(ctx.params.folder)}/${f}`);
+    return ctx;
+  });
+};