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73 lines
2.0 KiB
73 lines
2.0 KiB
3 years ago
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package main
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import (
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"flag"
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"fmt"
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"os"
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"strings"
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"github.com/Unbewohnte/FTU/client"
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"github.com/Unbewohnte/FTU/server"
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)
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// flags
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var PORT *int = flag.Int("port", 8080, "Specifies a port for a server")
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var SERVERADDR *string = flag.String("addr", "", "Specifies an IP for connection")
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var ISSERVER *bool = flag.Bool("server", false, "Server")
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var DOWNLOADSFOLDER *string = flag.String("downloadto", "", "Specifies where the client will store downloaded file")
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var SHAREDFILE *string = flag.String("sharefile", "", "Specifies what file server will serve")
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// helpMessage
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var HELPMSG string = `
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"-port", default: 8080, Specifies a port for a server
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"-addr", default: "", Specifies an IP for connection
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"-server", default: false, Share file or connect and receive one ?
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"-downloadto", default: "", Specifies where the client will store downloaded file
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"-sharefile", default: "", Specifies what file server will share`
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// Input-validation
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func checkFlags() {
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if *ISSERVER {
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if strings.TrimSpace(*SHAREDFILE) == "" {
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fmt.Println("No file specified !\n", HELPMSG)
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os.Exit(1)
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}
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if *PORT <= 0 {
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fmt.Println("Invalid port !\n", HELPMSG)
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os.Exit(1)
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}
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} else if !*ISSERVER {
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if strings.TrimSpace(*SERVERADDR) == "" {
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fmt.Println("Invalid IP address !\n", HELPMSG)
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os.Exit(1)
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}
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if strings.TrimSpace(*DOWNLOADSFOLDER) == "" {
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*DOWNLOADSFOLDER = "./downloads/"
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fmt.Println("Empty downloads folder. Changed to ./downloads/")
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}
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}
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}
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// parse flags, validate given values
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func init() {
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flag.Parse()
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checkFlags()
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}
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func main() {
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if *ISSERVER {
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// 1) create server -> 2) wait for a client ->|
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// 3) send handshake packet -> 4) if accepted - upload file
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server := server.NewServer(*PORT, *SHAREDFILE)
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server.WaitForConnection()
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server.MainLoop()
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} else {
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// 1) create client -> 2) try to connect to a server -> 3) wait for a handshake ->|
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// 4) accept or refuse -> 5) download|don`t_download file
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client := client.NewClient(*DOWNLOADSFOLDER)
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client.Connect(fmt.Sprintf("%s:%d", *SERVERADDR, *PORT))
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client.MainLoop()
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}
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}
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