Backend Development
Golang
How to Handle 404 Errors When Serving a React Frontend with a Go Backend?
How to Handle 404 Errors When Serving a React Frontend with a Go Backend?
Dec 14, 2024 pm 03:26 PM
How to Implement Frontend Routing in Go Applications
Problem:
When accessing a specific path (/my_frontend_path) directly in your browser for a Go application serving React frontend, you encounter a 404 error. This is because the Go server does not recognize the path, leading to a request for the page from the server.
Solution:
To delegate unrecognized paths to the frontend react router, you can implement one of several approaches:
1. Hash History
Hash history is recommended in the linked question and involves adding # to the URL for client-side routing. This ensures that the server does not interpret the path and allows the frontend router to handle it.
2. Catch-All Approach
For a purely server-side solution, you can implement a catch-all approach that returns index.html for any unrecognized path. This ensures that the frontend application is loaded and the router can detect and route the path accordingly.
Here's how you can implement it in Go:
func main() {
fs := http.FileServer(http.Dir(FSPATH))
http.HandleFunc("/my_api", func(w http.ResponseWriter, _ *http.Request) { w.Write([]byte("API CALL")) })
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
// If the requested file exists then return if; otherwise return index.html (fileserver default page)
if r.URL.Path != "/" {
fullPath := FSPATH + strings.TrimPrefix(path.Clean(r.URL.Path), "/")
_, err := os.Stat(fullPath)
if err != nil {
if !os.IsNotExist(err) {
panic(err)
}
// Requested file does not exist so we return the default (resolves to index.html)
r.URL.Path = "/"
}
}
fs.ServeHTTP(w, r)
})
http.ListenAndServe(":8090", nil)
}
Note: This approach will return index.html for all unrecognized paths, including non-existent files. You can consider adding limitations, such as checking file extensions, if this poses an issue.
The above is the detailed content of How to Handle 404 Errors When Serving a React Frontend with a Go Backend?. For more information, please follow other related articles on the PHP Chinese website!
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