fix(medusa): Query parser issues with large array (#4213)

* fix(medusa): Query parser issues with large array

* Create little-weeks-exercise.md

* add integration tests

packages/medusa/package.json

@@ -83,6 +83,7 @@
     "passport-http-bearer": "^1.0.1",
     "passport-jwt": "^4.0.1",
     "passport-local": "^1.0.0",
+    "qs": "^6.11.2",
     "randomatic": "^3.1.1",
     "redis": "^3.0.2",
     "reflect-metadata": "^0.1.13",

packages/medusa/src/loaders/api.ts

@@ -1,4 +1,5 @@
 import { Express } from "express"
+import qs from "qs"
 import bodyParser from "body-parser"
 import routes from "../api"
 import { AwilixContainer } from "awilix"
@@ -11,6 +12,18 @@ type Options = {
 }
 
 export default async ({ app, container, configModule }: Options) => {
+  // This is a workaround for the issue described here: https://github.com/expressjs/express/issues/3454
+  // We parse the url and get the qs to be parsed and override the query prop from the request
+  app.use(function (req, res, next) {
+    const parsedUrl = req.url.split("?")
+    parsedUrl.shift()
+    const queryParamsStr = parsedUrl.join("?")
+    if (queryParamsStr) {
+      req.query = qs.parse(queryParamsStr, { arrayLimit: Infinity })
+    }
+    next()
+  })
+
   app.use(bodyParser.json())
   app.use("/", routes(container, configModule.projectConfig))