Redirection Bug, with IsPreview (when using locales)

[dreamstar-enterprises]

Astro Info

5.11

If this issue only occurs in one browser, which browser is a problem?

No response

Describe the Bug

Hi have these settings:

  base: "/astro",
  site:
    isDev || isPreview
      ? "http://localhost:4321" // development
      : "https://www.myapp.com", // production build

In Dev mode, when I type http://localhost:4321/astro, I get redirected to:http://localhost:4321/astro/en-GB, so ok

In Preview mode, when I type http://localhost:4321/astro, I get redirected to:http://www.myapp.com/astro/en-GB

What's the expected result?

Becase of the logic I have:

In Preview mode, when I type http://localhost:4321/astro, I should get redirected to:http://localhost:4321/astro/en-GB
Or is preview mode using the settings, as if it was in Build?

P.S. I've had to resort to using preview / build mode locally, as astro doesn't yet support accessing astro locally behind a reverse proxy, e.g. http://localhost:7080/astro -> http://localhost:4321/astro

This had been raised as a previous GitHub issue, but was closed, without feature followup.

Link to Minimal Reproducible Example

seeabove

Participation

• I am willing to submit a pull request for this issue.

[github-actions]

Hello @dreamstar-enterprises. Please provide a minimal reproduction using a GitHub repository or StackBlitz. Issues marked with needs repro will be closed if they have no activity within 3 days.

[dreamstar-enterprises]

This is all you will need to reproduce the issue:

export default defineConfig({
  output: "static",
   base: "/astro",
  site:
    isDev || isPreview
      ? "http://localhost:4321" // development
      : "https://www.myapp.com", // production build
  prefetch: {
    defaultStrategy: "tap",
    prefetchAll: false,
  },
  i18n: {
    defaultLocale: i18nConfig.defaultLocale,
    locales: i18nConfig.locales.map((locale) => locale.code),
    fallback: {
      // @ts-ignore
      "en-us": "en-gb",
    },
    routing: {
      prefixDefaultLocale: true,
      redirectToDefaultLocale: true,
      fallbackType: "rewrite",
    },
  }
}

// Shared i18n configuration
export const i18nConfig = {
  defaultLocale: "en-gb",
  locales: [
    {
      code: "en-gb",
      name: "English (United Kingdom)",
    },
    {
      code: "en-us",
      name: "English (United States)",
    },
  ],
};

// Convert locales array to Record for sitemap (see below)
const sitemapLocales = Object.fromEntries(
  i18nConfig.locales.map((locale) => [locale.code, locale.code]),
);

[florian-lefebvre]

Can you create a minimal reproduction on stackblitz or as a repo? We can't take the time to manually reproduce unfortunately