Initial commit

main.go

@@ -0,0 +1,72 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/nats-io/nats.go"
+)
+
+func main() {
+	// Connect to NATS server
+	nc, err := nats.Connect(nats.DefaultURL)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer nc.Close()
+
+	// HTTP handler function
+	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+		// Read the request body
+		body, err := ioutil.ReadAll(r.Body)
+		if err != nil {
+			http.Error(w, "Error reading request body", http.StatusInternalServerError)
+			return
+		}
+		defer r.Body.Close()
+
+		// Drop the leading slash if there is one, and replace slashes with dots.
+		subject := strings.ReplaceAll(strings.TrimPrefix(r.URL.Path, "/"), "/", ".")
+
+		// Create a NATS message with the request body and headers
+		msg := nats.Msg{
+			Subject: fmt.Sprintf("http.%s", subject),
+			Data:    body,
+			Header:  nats.Header{},
+		}
+		log.Println("subject:", msg.Subject)
+
+		// Copy HTTP headers to NATS message headers
+		for key, values := range r.Header {
+			for _, value := range values {
+				msg.Header.Add(key, value)
+			}
+		}
+
+		// Send request to NATS and wait for reply
+		reply, err := nc.RequestMsg(&msg, 30*time.Second)
+		if err != nil {
+			http.Error(w, "Error processing request", http.StatusInternalServerError)
+			log.Println("Error processing the request", err)
+			return
+		}
+
+		// Copy NATS reply headers to HTTP response
+		for key, values := range reply.Header {
+			for _, value := range values {
+				w.Header().Add(key, value)
+			}
+		}
+
+		// Write NATS reply body to HTTP response
+		w.Write(reply.Data)
+	})
+
+	// Start HTTP server
+	fmt.Println("Server is running on http://localhost:8080")
+	log.Fatal(http.ListenAndServe(":8080", nil))
+}