Enable Caching for the Node-Service

Author: FalkWolsky

server/node-service/src/routes/apiRouter.ts

@@ -5,20 +5,43 @@ import * as npmControllers from "../controllers/npm";
 
 const apiRouter = express.Router();
 
+// In-memory cache object
+const cache: { [key: string]: any } = {};
+
+// Middleware to cache responses for specific routes
+function cacheMiddleware(req: express.Request, res: express.Response, next: express.NextFunction) {
+    const cacheKey = req.originalUrl;
+
+    // Check if the response is already cached
+    if (cache[cacheKey]) {
+        return res.json(cache[cacheKey]); // Return cached JSON object if it exists
+    }
+
+    // Override res.json instead of res.send to store response in cache as JSON
+    const originalJson = res.json.bind(res);
+    res.json = (body: any) => {
+        cache[cacheKey] = body; // Cache the JSON response
+        originalJson(body); // Send the JSON response
+        return res;
+    };
+
+    next();
+}
+
 apiRouter.post("/runJs", jsControllers.runJavascript);
 apiRouter.post("/batchRunJs", jsControllers.batchRunJavascript);
 
-apiRouter.get("/plugins", pluginControllers.listPlugins);
+apiRouter.get("/plugins", cacheMiddleware, pluginControllers.listPlugins);
 apiRouter.post("/runPluginQuery", pluginControllers.runPluginQuery);
-apiRouter.post("/getPluginDynamicConfig", pluginControllers.getDynamicDef);
+apiRouter.post("/getPluginDynamicConfig", cacheMiddleware, pluginControllers.getDynamicDef);
 apiRouter.post("/validatePluginDataSourceConfig", pluginControllers.validatePluginDataSourceConfig);
 
 // routes for npm registry and package fetching with config called by the api-service
 apiRouter.post("/npm/registry/*", npmControllers.fetchRegistryWithConfig);
 apiRouter.post("/npm/package/*", npmControllers.fetchPackageFileWithConfig);
 
 // temporary routes for testing npm registry and package routes by directly calling the node-service
-apiRouter.get("/npm/registry/*", npmControllers.fetchRegistry);
-apiRouter.get("/npm/package/*", npmControllers.fetchPackageFile);
+// apiRouter.get("/npm/registry/*", npmControllers.fetchRegistry);
+// apiRouter.get("/npm/package/*", npmControllers.fetchPackageFile);
 
 export default apiRouter;