Kur, Hello !

yalexx · yalexx · commit b36d850ed128 · 2020-09-22T18:32:32.000+03:00
diff --git a/016_building-a-tcp-server-for-http/04_hands-on/main.go b/016_building-a-tcp-server-for-http/04_hands-on/main.go
@@ -0,0 +1,75 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"net"
+	"strings"
+)
+
+func main() {
+	li, err := net.Listen("tcp", ":8080")
+	if err != nil {
+		log.Fatalln(err.Error())
+	}
+	defer li.Close()
+
+	for {
+		conn, err := li.Accept()
+		if err != nil {
+			log.Fatalln(err.Error())
+			continue
+		}
+		go handle(conn)
+	}
+}
+
+func handle(conn net.Conn) {
+	defer conn.Close()
+
+	// read request
+	m, u := request(conn)
+
+	fmt.Println("Method and Url: ", m, u)
+	// write response
+
+	if u == "/hello" {
+		respond(conn, `<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title></title></head><body><strong>Hello</strong></body></html>`)
+	}
+	{
+		respond(conn, `<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title></title></head><body><strong>KUR</strong></body></html>`)
+	}
+
+}
+
+func request(conn net.Conn) (string, string) {
+	i := 0
+	method := ""
+	url := ""
+
+	scanner := bufio.NewScanner(conn)
+	for scanner.Scan() {
+		ln := scanner.Text()
+
+		fmt.Println(ln)
+		if i == 0 {
+			method = strings.Fields(ln)[0]
+			url = strings.Fields(ln)[1]
+		}
+		if ln == "" {
+			break
+		}
+		i++
+	}
+	return method, url
+}
+
+func respond(conn net.Conn, body string) {
+
+	fmt.Fprint(conn, "HTTP/1.1 200 OK\r\n")
+	fmt.Fprintf(conn, "Content-Length: %d\r\n", len(body))
+	fmt.Fprint(conn, "Content-Type: text/html\r\n")
+	fmt.Fprint(conn, "\r\n")
+	fmt.Fprint(conn, body)
+}
