[vite-plugin-cloudflare] fix: preserve :authority and port in HTTP/2 requests

[devaniketh]

Fixes #14931.

When Vite dev server is served over HTTPS with HTTP/2 enabled, browsers communicate using HTTP/2 where the host and port are passed via the :authority pseudo-header rather than the HTTP/1.1 Host header.

Previously, request conversion in createRequestForIncomingMessage omitted pseudo-headers when creating the Web Standard Request, causing headers.get("Host") to be null and falling back to "localhost", discarding non-default ports (such as :5173). Consequently, X-Forwarded-Host was not set in toMiniflareRequest, breaking OAuth and Clerk handshake redirects.

This change:

1. Extracts authority and non-default port from req.headers[":authority"] and req.authority.
2. Extracts scheme from req.headers[":scheme"] and req.scheme.
3. Ensures Host header is populated on the created Request.
4. Falls back to new URL(request.url).host in toMiniflareRequest to guarantee X-Forwarded-Host preserves the host and port.

---

• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows:
  • Additional testing not necessary because:
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: Internal dev server request adaptation fix.

---

[changeset-bot]

🦋 Changeset detected

Latest commit: 18d4715

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@cloudflare/vite-plugin	Patch

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[workers-devprod]

Codeowners approval required for this PR:

• @cloudflare/wrangler

Show detailed file reviewers

• .changeset/vite-plugin-preserve-authority-port.md: [@cloudflare/wrangler]
• packages/vite-plugin-cloudflare/src/tests/utils.spec.ts: [@cloudflare/wrangler]
• packages/vite-plugin-cloudflare/src/utils.ts: [@cloudflare/wrangler]

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commit: 18d4715

[devaniketh]

@dario-piotrowicz hey can you look into the PR , let me know if there are any changes to made