package proxy
import (
"fmt"
"net/http"
"net/http/httputil"
"net/url"
"strconv"
"strings"
)
func ReverseProxyHandler(w http.ResponseWriter, r *http.Request) {
parts := strings.SplitN(r.URL.Path, "/", 4) // ["", "user-app", "5000", "some/path"]
if len(parts) < 3 {
http.Error(w, "Invalid user-app path", http.StatusBadRequest)
return
}
portStr := parts[2]
port, err := strconv.Atoi(portStr)
if err != nil || port < 1024 || port > 65535 {
http.Error(w, "Invalid port", http.StatusBadRequest)
return
}
targetURL := fmt.Sprintf("http://localhost:%d", port)
remote, err := url.Parse(targetURL)
if err != nil {
http.Error(w, "Invalid target URL", http.StatusInternalServerError)
return
}
proxyService := httputil.NewSingleHostReverseProxy(remote)
// Rewrite the request path (strip /user-app/<port>)
r.URL.Path = "/" + strings.Join(parts[3:], "/")
proxyService.ServeHTTP(w, r)
}
