feat: allow setting rewrite option for devProxy

docs/content/3.config.md

@@ -278,6 +278,7 @@ You can use this option to override development server routes and proxy-pass req
   devProxy: {
     '/proxy/test': 'http://localhost:3001',
     '/proxy/example': { target: 'https://example.com', changeOrigin: true }
+    '/api': { target: 'https://example.com', changeOrigin: true, rewrite: (path) => path.replace(/^\/api/, '') }
   }
 }
 ```

src/dev/server.ts

@@ -5,6 +5,7 @@ import {
   App,
   createApp,
   eventHandler,
+  getRequestPath,
   fromNodeMiddleware,
   H3Error,
   H3Event,
@@ -168,6 +169,11 @@ export function createDevServer(nitro: Nitro): NitroDevServer {
     app.use(
       route,
       eventHandler(async (event) => {
+        const { rewrite } = opts;
+        if (rewrite) {
+          const path = getRequestPath(event);
+          event.node.req.url = rewrite(path);
+        }
         await proxy.handle(event);
       })
     );

src/types/nitro.ts

@@ -279,7 +279,9 @@ export interface NitroOptions extends PresetOptions {
   dev: boolean;
   devServer: DevServerOptions;
   watchOptions: WatchOptions;
-  devProxy: Record<string, string | ProxyServerOptions>;
+  devProxy: Record<string, string | ProxyServerOptions & {
+    rewrite?: (string) => string;
+  }>;
 
   // Logging
   logging: {