From 4b94bf5f1b256205bcc49c1ff7ced816aaacba07 Mon Sep 17 00:00:00 2001
From: Jacob M-G Evans <jacobmgevans@gmail.com>
Date: Tue, 29 Mar 2022 14:21:53 -0500
Subject: [PATCH] bugfix: proxyServer was conducting async behavior in
 useEffect without cleaning up the SIGINT didnt allow for graceful shutdown
 for subsequent startups of proxyServer

---
 .changeset/flat-ladybugs-care.md | 7 +++++++
 packages/wrangler/src/proxy.ts   | 6 ++++++
 2 files changed, 13 insertions(+)
 create mode 100644 .changeset/flat-ladybugs-care.md

diff --git a/.changeset/flat-ladybugs-care.md b/.changeset/flat-ladybugs-care.md
new file mode 100644
index 000000000000..54e6ca3758a0
--- /dev/null
+++ b/.changeset/flat-ladybugs-care.md
@@ -0,0 +1,7 @@
+---
+"wrangler": patch
+---
+
+bugfix: The proxyServer was conducting async behavior in useEffect without cleaning up the SIGINT didn't allow for graceful shutdown for subsequent startups of proxyServer.
+
+fixes #375
diff --git a/packages/wrangler/src/proxy.ts b/packages/wrangler/src/proxy.ts
index c72633f46b56..05ac05c4b02d 100644
--- a/packages/wrangler/src/proxy.ts
+++ b/packages/wrangler/src/proxy.ts
@@ -96,6 +96,12 @@ export function usePreviewServer({
           await reportError(err);
         });
     }
+    return () => {
+      if (proxyServer !== undefined) {
+        proxyServer.close();
+        setProxyServer(undefined);
+      }
+    };
   }, [proxyServer, localProtocol]);
 
   /**