// CreateMeta - This function creates a new metainfo file for use within the GUI server
// @param name string - The name of the new lynk
func CreateMeta(name string) error {
tDir, err := os.Stat(lynxutil.HomePath + name) // Checks to see if the directory exists
if err != nil || !tDir.IsDir() {
fmt.Println("ERROR!")
return errors.New("Directory " + name + "does not exist in the Lynx directory.")
}
metaFile, err := os.Create(lynxutil.HomePath + name + "/meta.info")
if err != nil {
fmt.Println(err)
return err
}
currentUser, _ := user.Current()
metaFile.WriteString("announce:::" + lynxutil.GetIP() + ":" + lynxutil.TrackerPort + "\n")
metaFile.WriteString("lynkName:::" + name + "\n")
metaFile.WriteString("owner:::" + currentUser.Name + "\n")
addLynk(name, currentUser.Name)
filepath.Walk(lynxutil.HomePath+name, visitFiles)
parseMetainfo(lynxutil.HomePath + name + "/meta.info")
return nil // Everything was fine if we reached this point
}
// CreateSwarm - Creates a new swarm.info upon clicking of create button in gui
// @param string name - the name of the lynk
func CreateSwarm(name string) {
p1 := lynxutil.Peer{IP: "", Port: "8080"}
currentuser, err := user.Current()
trackerDir := currentuser.HomeDir + "/Lynx/" + name + "/" + name + "_Tracker"
os.Mkdir(trackerDir, 0755)
_, err = os.Create(trackerDir + "/swarm.info")
if err != nil {
fmt.Println(err)
}
p1.IP = lynxutil.GetIP()
addToSwarminfo(p1, trackerDir+"/swarm.info")
lynxutil.FileCopy(currentuser.HomeDir+"/Lynx/"+name+"/meta.info", trackerDir+"/meta.info")
}
// DeleteLynk - This function deletes a Lynk based upon its name from the list of lynks
// @param nameToDelete string - the lynk we want to remove
func DeleteLynk(nameToDelete string, deleteLocal bool) {
i := 0
for i < len(lynks) {
if nameToDelete == lynks[i].Name {
// Removes this peer from swarm.info file
conn, _ := net.Dial("tcp", lynks[i].Tracker)
fmt.Fprintf(conn, "Disconnect:"+lynxutil.GetIP()+":"+lynks[i].Name+"\n")
lynks = append(lynks[:i], lynks[i+1:]...)
}
i++
}
updateLynksFile()
if deleteLocal {
os.RemoveAll(lynxutil.HomePath + nameToDelete)
}
}
// Asks the tracker for a list of peers and then places them into a lynk's peers array
// @param string lynkName - The name of the lynk we're interested in
func askTrackerForPeers(lynkName string) error {
lynk := lynxutil.GetLynk(lynks, lynkName)
// Connects to tracker
conn, err := net.Dial("tcp", lynk.Tracker)
if err != nil {
i := 0
for i < len(lynk.Peers) && err != nil {
pConn, _ := net.Dial("tcp", lynk.Peers[i].IP+":"+lynk.Peers[i].Port)
fmt.Fprintf(pConn, "Tracker_Request:"+lynkName+"/\n")
reply := ""
reply, err = bufio.NewReader(pConn).ReadString('\n') // Waits for a String ending in newline
reply = strings.TrimSpace(reply)
conn, err = net.Dial("tcp", reply)
i++
}
// We could not connect to the tracker
if err != nil {
return err
}
}
// Gives IP and ServerPort So It Can Be Added To swarm.info
fmt.Fprintf(conn, "Swarm_Request:"+lynxutil.GetIP()+":"+lynxutil.ServerPort+":"+lynkName+"\n")
reader := bufio.NewReader(conn)
tp := textproto.NewReader(reader)
reply, err := tp.ReadLine()
//fmt.Println(reply)
// Tracker will close connection when finished - which will break us out of this loop
for err == nil {
peerArray := strings.Split(reply, ":::")
tmpPeer := lynxutil.Peer{IP: peerArray[0], Port: peerArray[1]}
if !contains(lynk.Peers, tmpPeer) {
lynk.Peers = append(lynk.Peers, tmpPeer)
}
reply, err = tp.ReadLine()
}
return nil // Did not have an error if we reached this point
}