fix: return 500 on proxy error only if possible (fixes #9172) (#9193)

sapphi-red · web-flow · commit b2f6bdcf3d2f · 2022-07-18T16:49:24.000+02:00
diff --git a/packages/vite/src/node/server/middlewares/proxy.ts b/packages/vite/src/node/server/middlewares/proxy.ts
@@ -55,7 +55,7 @@ export function proxyMiddleware(
             error: err
           }
         )
-        if (!res.writableEnded) {
+        if (!res.headersSent && !res.writableEnded) {
           res
             .writeHead(500, {
               'Content-Type': 'text/plain'

Original file line number	Diff line number	Diff line change
`@@ -55,7 +55,7 @@ export function proxyMiddleware(`
`55`	`55`	`error: err`
`56`	`56`	`}`
`57`	`57`	`)`
`58`		`- if (!res.writableEnded) {`
	`58`	`+ if (!res.headersSent && !res.writableEnded) {`
`59`	`59`	`res`
`60`	`60`	`.writeHead(500, {`
`61`	`61`	`'Content-Type': 'text/plain'`