fix(routing): actions should redirect the original pathname

[ematipico]

Changes

Closes #12146
Closes PLT-2576

An Astro action uses context.url.pathname for its redirect, however this is a bug because when there's a rewrite, the APIContext gets updated in place when using `next(/payload/). Astro actions need to redirect to the same original URL where the initial request started.

To fix the bug, we inject a well known header when we create RenderContext, so no matter how many rewrites happen, the original pathname is always there and the same

Testing

Created a new e2e test

Docs

N/A

[changeset-bot]

🦋 Changeset detected

Latest commit: d1fc9c2

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

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[bluwy]

Didn't notice the tests are failing 🙈 Could be related to copying the request

[ematipico]

Didn't notice the tests are failing 🙈 Could be related to copying the request

Most probably, yeah. I think it's fine to not try to copy the body, and copy the request normally. Let's see if that works

[bluwy]

Test fix looks great! The remaining fail seems expected from main

[sergeysova]

Looks like I have similar crash in production:

[info]TypeError: immutable
[info]    at appendHeader (node:internal/deps/undici/undici:8550:15)
[info]    at _Headers.append (node:internal/deps/undici/undici:8752:16)
[info]    at NodeApp.render (file:///class/dist/server/chunks/_@astrojs-ssr-adapter_DTyDJ9ui.mjs:870:26)
[info]    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
[info]    at async file:///class/dist/server/chunks/_@astrojs-ssr-adapter_DTyDJ9ui.mjs:1204:30

astro: 4.16.7

[sergeysova]

Downgrade to 4.16.6 fixed