init

go.mod

@@ -0,0 +1,5 @@
+module api_manager
+
+go 1.23.4
+
+require github.com/go-chi/chi/v5 v5.2.0 // indirect

go.sum

@@ -0,0 +1,2 @@
+github.com/go-chi/chi/v5 v5.2.0 h1:Aj1EtB0qR2Rdo2dG4O94RIU35w2lvQSj6BRA4+qwFL0=
+github.com/go-chi/chi/v5 v5.2.0/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=

main.go

@@ -0,0 +1,56 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/v5/middleware"
+)
+
+func main() {
+	apiURL := "https://catfact.ninja"
+
+	r := chi.NewRouter()
+	r.Use(middleware.Logger)
+	r.Use(middleware.Recoverer)
+
+	// Parse the API URL
+	parsedURL, err := url.Parse(apiURL)
+	if err != nil {
+		log.Fatalf("Failed to parse API URL: %v", err)
+	}
+
+	r.Handle("/cats", reverseProxy(parsedURL, "/fact"))
+
+	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
+		w.Write([]byte("root."))
+	})
+
+	log.Println("Proxy running on http://localhost:3333")
+	http.ListenAndServe(":3333", r)
+}
+
+// reverseProxy forwards requests to the target URL with path rewriting
+func reverseProxy(target *url.URL, targetPath string) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// Create a reverse proxy
+		proxy := httputil.NewSingleHostReverseProxy(target)
+
+		// Update the request path to the target API path
+		r.URL.Path = targetPath
+		r.URL.Host = target.Host
+		r.URL.Scheme = target.Scheme
+
+		// Set the Host header explicitly to match the target
+		r.Host = target.Host
+
+		// Debug: Log the final URL being proxied
+		log.Printf("Proxying request to: %s%s", target, targetPath)
+
+		// Serve the proxied request
+		proxy.ServeHTTP(w, r)
+	})
+}