From 29693b6cde6f0e189284d57d4955f8046807dd2f Mon Sep 17 00:00:00 2001
From: Owen Calvin <owen.gombas@gmail.xom>
Date: Sun, 1 Mar 2020 21:12:15 +0100
Subject: [PATCH] Fix file upload bug with apollo-server-koa (#2843)

---
 packages/apollo-server-koa/src/ApolloServer.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/apollo-server-koa/src/ApolloServer.ts b/packages/apollo-server-koa/src/ApolloServer.ts
index 2043e299f60..0967444ef75 100644
--- a/packages/apollo-server-koa/src/ApolloServer.ts
+++ b/packages/apollo-server-koa/src/ApolloServer.ts
@@ -37,6 +37,7 @@ const fileUploadMiddleware = (
   server: ApolloServerBase,
 ) => async (ctx: Koa.Context, next: Function) => {
   if (typeis(ctx.req, ['multipart/form-data'])) {
+    const finished = new Promise(resolve => ctx.req.on('end', resolve));
     try {
       ctx.request.body = await processFileUploads(
         ctx.req,
@@ -51,6 +52,8 @@ const fileUploadMiddleware = (
         formatter: server.requestOptions.formatError,
         debug: server.requestOptions.debug,
       });
+    } finally {
+      await finished;
     }
   } else {
     return next();