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package web
import (
"io"
"io/fs"
"net/http"
"path/filepath"
"strings"
)
func ServeFrontend(distDir string) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
// Use fs.Sub to treat distDir as the root
box, err := fs.Sub(frontendFiles, distDir)
if err != nil {
http.Error(w, "frontend not found", http.StatusNotFound)
return
}
// Get the file path from the URL
path := r.URL.Path
path = strings.TrimPrefix(path, "/")
// If path is empty, it's index.html
if path == "" {
path = "index.html"
}
// Try to open the file
f, err := box.Open(path)
if err != nil {
// If file not found, serve index.html for client-side routing
// but only if it looks like a route (no extension)
if !strings.Contains(filepath.Base(path), ".") {
f, err = box.Open("index.html")
if err != nil {
http.Error(w, "frontend not found", http.StatusNotFound)
return
}
path = "index.html"
} else {
http.Error(w, "not found", http.StatusNotFound)
return
}
}
defer func() { _ = f.Close() }()
d, err := f.Stat()
if err != nil {
http.Error(w, "internal error", http.StatusInternalServerError)
return
}
http.ServeContent(w, r, path, d.ModTime(), f.(io.ReadSeeker))
}
}
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