Co-authored-by: Tobias Koppers <sokra@users.noreply.github.com>
With this PR we are updating the way we check the usage of `eval` and other dynamic code evaluation (like `new Function`) for middleware. Now instead of simply showing a warning it will behave differently depending on if we are building or in development.
- Development: we replace the dynamic code with a wrapper so that we print a warning only when the code is used. We don't fail in this scenario as it is possible that once the application is built the code that uses `eval` is left out.
- Build: we detect with tree shaking if the code that will be bundled into the middleware includes any dynamic code and in such scenario we make the build fail as don't want to allow it for the production environment.
Closes#30674
## Bug
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`
## Documentation / Examples
- [ ] Make sure the linting passes by running `yarn lint`
* Add experimental config for middleware
* Apply suggestions from code review
Co-authored-by: Steven <steven@ceriously.com>
Co-authored-by: Steven <steven@ceriously.com>
This PR adds support for [Middleware as per RFC ](https://github.com/vercel/next.js/discussions/29750).
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`
## Documentation / Examples
- [ ] Make sure the linting passes
This replaces the server-sent events HMR connection with a WebSocket connection to prevent hitting browser connection limits, allow sending events back from the browser, and overall better performance.
This approach sets up the the `upgrade` event listener on the server immediately when created via `next dev` and on the first request using `req.socket.server` when created via a custom server. In a follow-up PR we can push the files changed via the WebSocket as well.
x-ref: https://github.com/vercel/next.js/issues/10061
x-ref: https://github.com/vercel/next.js/issues/8064
x-ref: https://github.com/vercel/next.js/issues/4495
## Bug
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`
## Documentation / Examples
- [ ] Make sure the linting passes
Ability to provide a custom tsconfig file.
**Example Usage:**
```js
// next.config.js
module.exports = {
typescript: {
tsconfigPath: "myconfig.json"
}
}
```
## Bug
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [x] Related issues linked using [`fixes #23972 (discussion)`](https://github.com/vercel/next.js/discussions/23972)
- [x] Integration tests added
- [x] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`
## Documentation / Examples
- [x] Make sure the linting passes
Remove unnecessary `React.Suspense` checks, as the minimum supported version is `react@>=17.0.1`. Also removes some files from the `react-18` integration test that are no longer necessary as of #26664.
By itself, `withCoalescedInvoke` with a separate `this.incrementalCache.set(...)` isn't really suitable for streaming responses. Since streaming is asynchronous, updating the cache separately introduces a gap where another origin request for the same resource could be made.
This could potentially be addressed by moving the cache update, but then `IncrementalCache` itself would need to be made to support streaming, in addition to the many other responsibilities it has. In this case, it seemed best to just use composition to add another caching layer in front of it, which is a familiar and understandable concept. Eventually, we might want to move this cache to the HTTP layer, which will also be simpler with this change.
As an added bonus, `renderToResponseWithComponents` becomes significantly simpler, and we delete some duplication.
Refactors the internals of `next-server` to use `ResponsePayload` instead of `string | null` and manual `sendPayload` calls. This is the first step toward streaming support.
I split `renderToResponseWithComponents` into a separate `renderToResponseWithComponentsInternal` function for ease of review: GitHub's diff rendering was highly misleading, making it seem as though more of the function had changed. The separate function just makes the actual change clearer: we split `renderToHTMLWithComponents` into two promises; one that represents the actual render result, and one that represents all of the work (including background work for e.g. revalidation) that needs to be done as part of generating the result.
These changes make it easier to bubble up a `ResponsePayload`, instead of sometimes calling `sendPayload` out-of-band, centralizing all payload handling in `sendResponse` and eventually a similar function for public APIs that return a string. This centralization will make it much easier to handle a response that needs to be streamed, which is coming soon in another PR.
