From e81a118735045a40f0ab93c1bedef5b7d674f2f0 Mon Sep 17 00:00:00 2001
From: cisen <csacxc@gmail.com>
Date: Sat, 6 Feb 2021 01:02:42 +0800
Subject: [PATCH] feat(proxy): support conditional options for proxy request
 (#1888)

...by returning an options object from the `bypass` function.
---
 packages/vite/src/node/server/middlewares/proxy.ts | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/packages/vite/src/node/server/middlewares/proxy.ts b/packages/vite/src/node/server/middlewares/proxy.ts
index de72cfeb638e14..7c40f4609d0899 100644
--- a/packages/vite/src/node/server/middlewares/proxy.ts
+++ b/packages/vite/src/node/server/middlewares/proxy.ts
@@ -85,6 +85,7 @@ export function proxyMiddleware({
         url.startsWith(context)
       ) {
         const [proxy, opts] = proxies[context]
+        const proxyOpitons: HttpProxy.ServerOptions = {}
 
         if (opts.bypass) {
           const bypassResult = opts.bypass(req, res, opts)
@@ -92,6 +93,10 @@ export function proxyMiddleware({
             req.url = bypassResult
             debug(`bypass: ${req.url} -> ${bypassResult}`)
             return next()
+          } else if (typeof bypassResult === 'object') {
+            Object.assign(proxyOpitons, bypassResult)
+            debug(`bypass: ${req.url} use modified opitions: %O`, proxyOpitons)
+            return next()
           } else if (bypassResult === false) {
             debug(`bypass: ${req.url} -> 404`)
             return res.end(404)
@@ -102,7 +107,7 @@ export function proxyMiddleware({
         if (opts.rewrite) {
           req.url = opts.rewrite(req.url!)
         }
-        proxy.web(req, res)
+        proxy.web(req, res, proxyOpitons)
         return
       }
     }