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package main
import (
"fmt"
"net"
"os"
"strings"
)
func main() {
l, err := net.Listen("tcp", "0.0.0.0:4221")
if err != nil {
fmt.Println("Failed to bind to port 4221")
os.Exit(1)
}
conn, err := l.Accept()
if err != nil {
fmt.Println("Error accepting connection: ", err.Error())
os.Exit(1)
}
request, err := NewRequest(conn)
if err != nil {
fmt.Println("Error getting target: ", err.Error())
os.Exit(1)
}
if request.Target == "/" {
_, err = conn.Write([]byte("HTTP/1.1 200 OK\r\n\r\n"))
if err != nil {
fmt.Println("Error connection write: ", err.Error())
}
} else if strings.HasPrefix(request.Target, "/echo/") {
message := strings.SplitN(request.Target, "/", 3)[2]
_, err = conn.Write([]byte("HTTP/1.1 200 OK\r\n"))
if err != nil {
fmt.Println("Error connection write: ", err.Error())
}
_, err = conn.Write([]byte("Content-Type: text/plain\r\n"))
if err != nil {
fmt.Println("Error connection write: ", err.Error())
}
_, err = conn.Write([]byte(fmt.Sprintf("Content-Length: %d\r\n", len(message))))
if err != nil {
fmt.Println("Error connection write: ", err.Error())
}
_, err = conn.Write([]byte("\r\n"))
if err != nil {
fmt.Println("Error connection write: ", err.Error())
}
_, err = conn.Write([]byte(message))
if err != nil {
fmt.Println("Error connection write: ", err.Error())
}
} else {
_, err = conn.Write([]byte("HTTP/1.1 404 Not Found\r\n\r\n"))
if err != nil {
fmt.Println("Error connection write: ", err.Error())
}
}
}
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