Ask How can I redirect all 404 errors to another domain using net/http?

[Brajet]

I currently have two middlewares: Auth and request logger. The desired behavior is to only run these middlewares for requests that are directed towards valid paths and all invalid paths should be redirected to another domain. Here's a simplified example of the code I have:

mux := http.NewServeMux()

mux.Handle("/", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
http.Redirect(w, r, "https://example.com", http.StatusMovedPermanently)
}))

routes.AddRoutes(
mux,
config,
)

var handler http.Handler = mux
handler = middlewares.AuthMiddleware(handler, config)
handler = httplog.Logger(handler).

But the middlewares run and then it redirects. I don't want middlewares to be run for routes that are not defined. Any help will be appreciated.

 

[Anthony Joshua]

A simple way to redirect 404 errors in Go is to create a custom handler that wraps your existing routes. Inside the handler, if a URL isn't found, you call http.Redirect. You can set the status to http.StatusMovedPermanently or http.StatusFound depending on whether the redirect is permanent or temporary. This lets you send all missing pages to a new domain instead of showing the default 404 page. It's easy to implement and keeps your server behavior consistent for all invalid URLs.

 

[Felix😎]

To redirect all 404 errors to another domain using net/http, you can set up a custom HTTP error handler. This involves creating a new http.HandlerFunc that checks the status code and, if it's a 404, performs a redirect to the desired domain. You can then register this custom handler with your server's mux. This way, whenever a 404 error occurs, the user will be seamlessly redirected to the alternative domain without seeing the original 404 page. It's a neat way to handle those pesky 404 errors and provide a better user experience.