Command

build

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

20.3.6

Description

In our app, we optionally use the X-Forwarded-Prefix header to configure the base href. This works correctly in version 20.3.6, but after upgrading to 20.3.7 (and in later versions including v21), we encounter a redirect loop when a custom base href is used. The issue does not occur when the default base href is used.

• domain.com – 200 OK
• domain.com/app – 302 Found (redirect loop)

Minimal Reproduction

https://github.com/pf-vkocib/angular-ssr-20.3.7-redirect-loop-reproduction

1. configure local nginx based on example-nginx.conf
2. npm install
3. npm run serve:ssr:ssr-redirect-loop
4. visit localhost/app

(v20.3.6 branch uses previous version and it is ok)

Exception or Error

ERR_TOO_MANY_REDIRECTS 

Your Environment

Angular CLI: 20.3.7 Node: 20.19.2 Package Manager: npm 10.8.2 OS: darwin arm64 Angular: 20.3.13 ... common, compiler, compiler-cli, core, forms ... platform-browser, platform-server, router Package Version ------------------------------------ @angular-devkit/architect 0.2003.7 @angular-devkit/core 20.3.7 @angular-devkit/schematics 20.3.7 @angular/build 20.3.7 @angular/cli 20.3.7 @angular/ssr 20.3.7 @schematics/angular 20.3.7 rxjs 7.8.2 typescript 5.9.3 zone.js 0.15.1 

Anything else relevant?

No response