How to redirect all 404 errors - swift

Question

How would I catch all 404 errors and redirect to /app/index.html (I'm trying to satisfy Angular's need to forward all not found resources to index.html) ? I thought implementing my own middleware would work, but not sure I'm doing it right
public final class ForwardToAngularMiddleware: Middleware {
public func respond(to req: Request, chainingTo next: Responder) throws -> EventLoopFuture<Response> {
do {
let response: Future<Response> = try next.respond(to: req)
return response
} catch let error as AbortError {
if error.status == .notFound && req.http.url.path.starts(with: "/app") {
return Future.map(on: req) { req.redirect(to: "/index.html") }
}
throw error
}
}
}
My program never hits the catch block no matter what URL I send. I am configuring my middleware like this:
middlewares.use(FileMiddleware.self)
middlewares.use(ForwardToAngularMiddleware())
middlewares.use(ErrorMiddleware.self)
middlewares.use(SessionsMiddleware.self)
services.register(middlewares)

Answer 1

You may be hitting a couple of issues here. First, the abort error could be being thrown in a future, in which case you need to add a catchMap to the next.respond(to:) call to catch that case.
It also may not throw (though this is unlikely), so you can try unwrapping the response and checking the status code.
Have you put a breakpoint in to see if it ever hits it etc?