post_30

app.ts

app.get("/photos", async (req: Request, res: Response) => {
  const albumId = req.query.albumId;

  // Check the cache
  const value = await client.get(`photos?albumId=${albumId}`);
  if (value) {
    console.log("Cache hit!");
    res.json(JSON.parse(value));
  } else {
    console.log("Cache miss!");
    const data = await axios.get(
      "https://jsonplaceholder.typicode.com/photos",
      {
        params: {
          albumId,
        },
      }
    );
    client.setEx(
      `photos?albumId=${albumId}`,
      DEFAULT_EXPIRATION,
      JSON.stringify(data.data)
    );
    res.json(data.data);
  }
});