feat: write a http-echo-server in go for fun

bin/http-echo-server.go

@@ -0,0 +1,44 @@
+/// 2>/dev/null; gorun "$0" "$@" ; exit $?
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"strconv"
+	"strings"
+)
+
+var (
+	port = flag.Int("p", 8080, "port to listen to")
+	bind = flag.String("b", "127.0.0.1", "address to bind to")
+)
+
+func echoHandler(w http.ResponseWriter, req *http.Request) {
+	fmt.Println("\n<----- Request Start ----->")
+	fmt.Printf("%s %s\n", req.Method, req.URL.String())
+	for h, v := range req.Header {
+		fmt.Printf("%s: %s\n", h, strings.Join(v, ", "))
+	}
+
+	body, _ := ioutil.ReadAll(req.Body)
+	if len(body) > 0 {
+		fmt.Println()
+		fmt.Println(string(body))
+	}
+
+	fmt.Println("<----- Request End ----->")
+	w.WriteHeader(http.StatusOK)
+}
+
+func main() {
+	flag.Parse()
+
+	http.HandleFunc("/", echoHandler)
+
+	address := (*bind) + ":" + (strconv.Itoa(*port))
+	fmt.Printf("Listening on %s\n", address)
+	log.Fatal(http.ListenAndServe(address, nil))
+}