Add new LOWCODER_NODE_REQUEST_SIZE_LIMIT to handle nodejs body size.

amitshuklabag · web-flow · commit 96ce8bb82973 · 2025-08-07T19:17:27.000+05:30
Currently, if we upload a file more than 1 MB, there is an error in the backend, so to fix this, I have added a new env var:

PayloadTooLargeError: request entity too large
    at readStream (/lowcoder/node-service/app/node_modules/raw-body/index.js:163:17)
    at getRawBody (/lowcoder/node-service/app/node_modules/raw-body/index.js:116:12)
    at read (/lowcoder/node-service/app/node_modules/body-parser/lib/read.js:79:3)
    at jsonParser (/lowcoder/node-service/app/node_modules/body-parser/lib/types/json.js:138:5)
    at /lowcoder/node-service/app/build/server.js:43:46
    at newFn (/lowcoder/node-service/app/node_modules/express-async-errors/index.js:16:20)
    at Layer.handle [as handle_request] (/lowcoder/node-service/app/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/lowcoder/node-service/app/node_modules/express/lib/router/index.js:328:13)
    at /lowcoder/node-service/app/node_modules/express/lib/router/index.js:286:9
    at Function.process_params (/lowcoder/node-service/app/node_modules/express/lib/router/index.js:346:12)
    at next (/lowcoder/node-service/app/node_modules/express/lib/router/index.js:280:10)
    at urlencodedParser (/lowcoder/node-service/app/node_modules/body-parser/lib/types/urlencoded.js:103:7)
    at newFn (/lowcoder/node-service/app/node_modules/express-async-errors/index.js:16:20)
    at Layer.handle [as handle_request] (/lowcoder/node-service/app/node_modules/express/lib/router/layer.js:95:5)
    at trim_prefix (/lowcoder/node-service/app/node_modules/express/lib/router/index.js:328:13)
    at /lowcoder/node-service/app/node_modules/express/lib/router/index.js:286:9 {
  expected: 338,
  length: 338,
  limit: 120,
  type: 'entity.too.large'
}
diff --git a/server/node-service/src/server.ts b/server/node-service/src/server.ts
@@ -10,6 +10,10 @@ import apiRouter from "./routes/apiRouter";
 import systemRouter from "./routes/systemRouter";
 import cors, { CorsOptions } from "cors";
 import bodyParser from "body-parser";
+const bytes = require("bytes");
+const requestSizeLimitStr = process.env.LOWCODER_NODE_REQUEST_SIZE_LIMIT || "50mb";
+const requestSizeLimitBytes = bytes(requestSizeLimitStr);
+
 collectDefaultMetrics();
 
 const prefix = "/node-service";
@@ -35,17 +39,18 @@ router.use(express.urlencoded({ extended: false }));
 
 /** Custom middleware: use raw body for encrypted requests */
 router.use((req, res, next) => {
-  if (req.headers["x-encrypted"]) {
-    bodyParser.text({ type: "*/*" })(req, res, next);
-  } else {
-    bodyParser.json()(req, res, next);
-  }
+    if (req.headers["x-encrypted"]) {
+        body_parser_1.default.text({ type: "*/*", requestSizeLimitStr })(req, res, next);
+    }
+    else {
+        body_parser_1.default.json({ requestSizeLimitStr })(req, res, next);
+    }
 });
 
 /** Takes care of JSON data */
 router.use(
   express.json({
-    limit: 1024 * 1024 * 50, // 50 MB
+    limit: requestSizeLimitBytes
   })
 );
 
