341 lines
13 KiB
Go
341 lines
13 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"html/template"
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"io"
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"log"
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"net/http"
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"os"
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"path/filepath"
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"strings"
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"time"
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"github.com/anacrolix/torrent"
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"github.com/gorilla/mux"
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"github.com/gorilla/websocket"
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//"github.com/anacrolix/dht"
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"encoding/json"
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"github.com/anacrolix/torrent/metainfo"
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"github.com/boltdb/bolt"
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)
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var (
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httpAddr = flag.String("addr", ":8000", "Http server address")
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baseTmpl string = "templates/base.tmpl"
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APP_ID = os.Getenv("APP_ID")
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APP_SECRET = os.Getenv("APP_SECRET")
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)
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var upgrader = websocket.Upgrader{
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ReadBufferSize: 1024,
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WriteBufferSize: 1024,
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}
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type torrentList struct { //helps create the JSON structure that react expects to recieve
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Totaltorrents int `json:"total"`
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ClientDBstruct []clientDB `json:"data"`
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}
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type clientDB struct {
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TorrentName string `json:"TorrentName"`
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DownloadedSize int64 `json:"DownloadedSize"`
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Size int64 `json:"Size"`
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DownloadSpeed float32 `json:"DownloadSpeed"`
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UploadSpeed float32 `json:"UploadSpeed"`
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DataBytesWritten int64
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DataBytesRead int64
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ActivePeers int `json:"ActivePeers"`
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TotalPeers int `json:"TotalPeers"`
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TorrentHashString string `json:"TorrentHashString"`
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PercentDone float32 `json:"PercentDone"`
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TorrentHash metainfo.Hash
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StoragePath string `json:"StorageLocation"`
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DateAdded string
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KnownSwarm []torrent.Peer
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Status string `json:"Status"`
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BytesCompleted int64
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UpdatedAt time.Time
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}
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func calculateTorrentSpeed(t *torrent.Torrent, c *clientDB) {
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now := time.Now()
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bytes := t.BytesCompleted()
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fmt.Println("UpdatedAt: ", c.UpdatedAt)
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if c.UpdatedAt.IsZero() {
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c.UpdatedAt = now
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fmt.Println("Setting Time", c.UpdatedAt)
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} else {
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dt := float32(now.Sub(c.UpdatedAt))
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fmt.Println("Delta Time: ", dt)
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db := float32(bytes - c.BytesCompleted)
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fmt.Println("Delta Bytes:", db)
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rate := db * (float32(time.Second) / dt)
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fmt.Println("form: ", float32(time.Second))
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if rate >= 0 {
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c.DownloadSpeed = rate
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}
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}
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}
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func calculateTorrentStatus(t *torrent.Torrent, c *clientDB) {
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if t.Seeding() {
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c.Status = "Seeding"
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} else if t.Stats().ActivePeers > 0 && t.BytesMissing() > 0 {
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c.Status = "Downloading"
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} else if t.Stats().ActivePeers == 0 && t.BytesMissing() == 0 {
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c.Status = "Completed"
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} else if t.Stats().ActivePeers == 0 && t.BytesMissing() > 0 {
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c.Status = "Awaiting Peers"
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} else {
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c.Status = "Unknown"
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}
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}
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func serveHome(w http.ResponseWriter, r *http.Request) {
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s1, _ := template.ParseFiles("templates/home.tmpl")
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s1.ExecuteTemplate(w, "base", map[string]string{"APP_ID": APP_ID})
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}
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func startTorrent(clientTorrent *torrent.Torrent, torrentLocalStorage *TorrentLocal, torrentDbStorage *bolt.DB, dataDir string, torrentFile string, torrentFileName string) {
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timeout := make(chan bool, 1) //creating a timeout channel for our gotinfo
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go func() {
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time.Sleep(45 * time.Second)
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timeout <- true
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}()
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select {
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case <-clientTorrent.GotInfo(): //attempting to retrieve info for torrent
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fmt.Println("Recieved torrent info..")
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clientTorrent.DownloadAll()
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case <-timeout: // getting info for torrent has timed out so purging the torrent
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fmt.Println("Dropping Torrent")
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clientTorrent.Drop()
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return
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}
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var TempHash metainfo.Hash
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TempHash = clientTorrent.InfoHash()
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fmt.Println(clientTorrent.Info().Source)
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torrentLocalStorage.Hash = TempHash.String() // we will store the infohash to add it back later on client restart (if needed)
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torrentLocalStorage.DateAdded = time.Now().Format("Jan _2 2006")
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torrentLocalStorage.StoragePath = dataDir //TODO check full path information for torrent storage
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torrentLocalStorage.TorrentName = clientTorrent.Name()
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torrentLocalStorage.TorrentStatus = "downloading" //by default start all the torrents as downloading.
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torrentLocalStorage.TorrentType = torrentFile //either "file" or "magnet" maybe more in the future
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if torrentFile == "file" {
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torrentLocalStorage.TorrentFileName = torrentFileName
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} else {
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torrentLocalStorage.TorrentFileName = ""
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}
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fmt.Printf("%+v\n", torrentLocalStorage)
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addTorrentLocalStorage(torrentDbStorage, torrentLocalStorage) //writing all of the data to the database
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clientTorrent.DownloadAll() //starting the download
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}
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func createRunningTorrentArray(tclient *torrent.Client, TorrentLocalArray []*TorrentLocal, config fullClientSettings, db *bolt.DB) (RunningTorrentArray []clientDB) {
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for _, element := range TorrentLocalArray { //re-adding all the torrents we had stored from last shutdown
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var singleTorrent *torrent.Torrent
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if element.TorrentType == "file" { //if it is a file pull it from the uploaded torrent folder
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fmt.Println("Filename", element.TorrentFileName)
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if _, err := os.Stat(element.TorrentFileName); err == nil { //if we CAN find the torrent, add it
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fmt.Println("Adding file name...", element.TorrentFileName)
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singleTorrent, _ = tclient.AddTorrentFromFile(element.TorrentFileName)
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} else { //if we cant find the torrent delete it
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fmt.Println("File Error", err)
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delTorrentLocalStorage(db, element)
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continue
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}
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} else {
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elementMagnet := "magnet:?xt=urn:btih:" + element.Hash //For magnet links just need to prepend the magnet part to the hash to readd
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singleTorrent, _ = tclient.AddMagnet(elementMagnet)
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}
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timeout := make(chan bool, 1) //creating a timeout channel for our gotinfo
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go func() {
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time.Sleep(45 * time.Second)
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timeout <- true
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}()
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select {
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case <-singleTorrent.GotInfo(): //attempting to retrieve info for torrent
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singleTorrent.DownloadAll()
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case <-timeout: // getting info for torrent has timed out so purging the torrent
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fmt.Println("Dropping Torrent")
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singleTorrent.Drop()
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delTorrentLocalStorage(db, element) //purging torrent from the local database
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continue
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}
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fmt.Println("Recieved info for: ", element.TorrentName)
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fullClientDB := new(clientDB)
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fullStruct := singleTorrent.Stats()
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bytesTotal := singleTorrent.Length()
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//bytesCompleted := singleTorrent.BytesCompleted()
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calculateTorrentSpeed(singleTorrent, fullClientDB) //Setting the downloadSpeed for the torrent
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//fullClientDB.UpdatedAt = time.Now() // setting the current time to measure download speed.
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var TempHash metainfo.Hash
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TempHash = singleTorrent.InfoHash()
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fullClientDB.DownloadedSize = singleTorrent.BytesCompleted() / 1024 / 1024
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fullClientDB.Size = bytesTotal / 1024 / 1024
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fullClientDB.TorrentHash = TempHash
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fullClientDB.PercentDone = (float32(fullClientDB.DownloadedSize) / float32(fullClientDB.Size))
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fullClientDB.DataBytesRead = fullStruct.ConnStats.DataBytesRead
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fullClientDB.DataBytesWritten = fullStruct.ConnStats.DataBytesWritten
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fullClientDB.ActivePeers = fullStruct.ActivePeers
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fullClientDB.TotalPeers = fullStruct.TotalPeers
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fullClientDB.TorrentHashString = TempHash.AsString()
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fullClientDB.StoragePath = element.StoragePath
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fullClientDB.TorrentName = element.TorrentName
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fullClientDB.DateAdded = element.DateAdded
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fmt.Println("Download Speed: ", fullClientDB.DownloadSpeed)
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fmt.Println("Percent Done: ", fullClientDB.PercentDone)
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fmt.Println("UpdatedAt: ", fullClientDB.UpdatedAt)
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calculateTorrentStatus(singleTorrent, fullClientDB) //calculate the status of the torrent
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RunningTorrentArray = append(RunningTorrentArray, *fullClientDB)
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}
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return RunningTorrentArray
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}
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func updateClient(torrentstats []clientDB, conn *websocket.Conn) { //get the torrent client and the websocket connection to write msg
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//first get the list of torrents in the client
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conn.WriteJSON(torrentstats) //converting to JSON and writing to the client
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}
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func main() {
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//setting up the torrent client
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Config := fullClientSettingsNew() //grabbing from settings.go
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os.Mkdir(Config.tFileUploadFolder, os.ModeDir) //creating a directory to store uploaded torrent files
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torrentLocalStorage := new(TorrentLocal) //creating a new struct that stores all of our local storage info
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fmt.Printf("%+v\n", Config)
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tclient, err := torrent.NewClient(&Config.Config) //pulling out the torrent specific config to use
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if err != nil {
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log.Fatalf("error creating client: %s", err)
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}
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db, err := bolt.Open("storage.db", 0600, nil) //initializing the boltDB store that contains all the added torrents
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if err != nil {
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log.Fatal(err)
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}
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defer db.Close() //defering closing the database until the program closes
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var TorrentLocalArray = []*TorrentLocal{} //this is an array of ALL of the local storage torrents, they will be added back in via hash
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var RunningTorrentArray = []clientDB{} //this stores ALL of the torrents that are running, used for client update pushes combines Local Storage and Running tclient info
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TorrentLocalArray = readInTorrents(db) //pulling in all the already added torrents
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if TorrentLocalArray != nil { //the first creation of the running torrent array
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RunningTorrentArray = createRunningTorrentArray(tclient, TorrentLocalArray, Config, db) //Updates the RunningTorrentArray with the current client data as well
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} else {
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fmt.Println("Database is empty!")
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}
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router := mux.NewRouter() //setting up the handler for the web backend
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router.HandleFunc("/", serveHome) //Serving the main page for our SPA
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http.Handle("/static/", http.FileServer(http.Dir("public")))
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http.Handle("/", router)
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http.HandleFunc("/uploadTorrent", func(w http.ResponseWriter, r *http.Request) { //grabbing the uploaded Torrent File and adding it to the client
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defer http.Redirect(w, r, "/", 301)
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file, header, err := r.FormFile("fileTest")
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if err != nil {
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fmt.Println("Error with fetching file or request issue", file)
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}
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defer file.Close() //defer closing the file until we are done manipulating it
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var filePath = filepath.Join(Config.tFileUploadFolder, header.Filename) //creating a full filepath to store the .torrent files
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fileName, err := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE, 0666) //generating the fileName
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if err != nil {
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panic(err)
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}
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io.Copy(fileName, file) //Dumping our recieved file into the filename
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clientTorrent, err := tclient.AddTorrentFromFile(fileName.Name()) //Adding the torrent into the client
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if err != nil {
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fmt.Println("Error adding Torrent from file: ", fileName.Name())
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} else {
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fmt.Println("Adding Torrent via file", fileName)
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startTorrent(clientTorrent, torrentLocalStorage, db, Config.DataDir, "file", fileName.Name())
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}
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})
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http.HandleFunc("/api", func(w http.ResponseWriter, r *http.Request) { //exposing the data to the
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TorrentLocalArray = readInTorrents(db)
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RunningTorrentArray = createRunningTorrentArray(tclient, TorrentLocalArray, Config, db) //Updates the RunningTorrentArray with the current client data as well
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var torrentlistArray = new(torrentList)
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torrentlistArray.ClientDBstruct = RunningTorrentArray
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torrentlistArray.Totaltorrents = len(RunningTorrentArray)
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torrentlistArrayJSON, _ := json.Marshal(torrentlistArray)
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w.Header().Set("Content-Type", "application/json")
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w.Write(torrentlistArrayJSON)
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//updateClient(RunningTorrentArray, conn) // sending the client update information over the websocket
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})
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http.HandleFunc("/websocket", func(w http.ResponseWriter, r *http.Request) { //websocket is the main data pipe to the frontend
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conn, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Println(err)
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return
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}
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for {
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msgType, msg, err := conn.ReadMessage()
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if err != nil {
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fmt.Println("Read Message Error", err)
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return
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}
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if string(msg) == "clientUpdateRequest" { //6 second update ping
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fmt.Println("client Requested Update")
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//time.Sleep(6 * time.Second)
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err = conn.WriteMessage(msgType, []byte("clientUpdate"))
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if err != nil {
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fmt.Println("Websocket Write err", err)
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return
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}
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TorrentLocalArray = readInTorrents(db)
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RunningTorrentArray = createRunningTorrentArray(tclient, TorrentLocalArray, Config, db) //Updates the RunningTorrentArray with the current client data as well
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var torrentlistArray = new(torrentList)
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torrentlistArray.ClientDBstruct = RunningTorrentArray
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torrentlistArray.Totaltorrents = len(RunningTorrentArray)
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//fmt.Printf("%+v\n", torrentlistArray)
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conn.WriteJSON(torrentlistArray)
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//updateClient(RunningTorrentArray, conn) // sending the client update information over the websocket
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} else if strings.HasPrefix(string(msg), "magnet:") {
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fmt.Println(string(msg))
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clientTorrent, err := tclient.AddMagnet(string(msg))
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if err != nil {
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fmt.Println("Magnet Error", err)
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}
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fmt.Println(clientTorrent)
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fmt.Printf("Adding Magnet Link")
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startTorrent(clientTorrent, torrentLocalStorage, db, Config.DataDir, "magnet", "") //starting the torrent and creating local DB entry
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} else {
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conn.Close()
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fmt.Println(string(msg))
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return
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}
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}
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})
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if err := http.ListenAndServe(*httpAddr, nil); err != nil {
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log.Fatalf("Error listening, %v", err)
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}
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}
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