From 13a4fe1c044a49d1c9962694979c058364795b32 Mon Sep 17 00:00:00 2001
From: Kalle Carlbark <kalle.carlbark@kcbark.net>
Date: Tue, 20 Aug 2024 11:09:55 +0200
Subject: [PATCH] first commit

---
 .gitignore |  1 +
 README.md  |  8 ++++++++
 go.mod     |  3 +++
 main.go    | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 62 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 go.mod
 create mode 100644 main.go

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..e03b4a6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+sw
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..765b647
--- /dev/null
+++ b/README.md
@@ -0,0 +1,8 @@
+# sw - Simple Web Server
+Listen on a specified port and prints out client information such as
+- Client IP address
+- Client source port
+- Client headers
+- Client body if sent
+
+Useful for debugging http requests with for example ngrok.
\ No newline at end of file
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..5955331
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module sw
+
+go 1.19
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..2a12cbc
--- /dev/null
+++ b/main.go
@@ -0,0 +1,50 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+)
+
+var port = flag.String("port", "3000", "listen on port")
+var body = flag.Bool("body", true, "print body")
+var header = flag.Bool("header", true, "print headers")
+
+func requestHandler(w http.ResponseWriter, r *http.Request) {
+	fmt.Printf("%s %s from %s", r.Method, r.RequestURI, r.RemoteAddr)
+
+	if *body {
+		r.Body = http.MaxBytesReader(w, r.Body, 1048576)
+		body, err := io.ReadAll(r.Body)
+		if err != nil {
+			http.Error(w, "unable to read response", http.StatusBadRequest)
+		}
+		fmt.Printf("\n--- BODY ---\n%s\n", string(body))
+	}
+
+	if *header {
+		fmt.Println(r.Header)
+	}
+
+	fmt.Fprintf(w, "The current time is: %s\n", time.Now())
+}
+
+func main() {
+	flag.Parse()
+
+	srv := http.Server{
+		Addr:              ":" + *port,
+		WriteTimeout:      10 * time.Second,
+		ReadHeaderTimeout: 10 * time.Second,
+		Handler:           http.HandlerFunc(requestHandler),
+	}
+
+	fmt.Printf("Starting server on port %s\n", *port)
+	//srv.HandleFunc("/", requestHandler)
+	err := srv.ListenAndServe()
+	if err != nil {
+		fmt.Println("ListenAndServe:", err)
+	}
+}