Created
May 11, 2017 20:47
-
-
Save ekisu/ca2d335bfd5a8b6c02a64baf0783590b to your computer and use it in GitHub Desktop.
Get filesizes from DHT metadata
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package main; | |
import ( | |
"github.com/anacrolix/torrent" | |
"github.com/anacrolix/torrent/metainfo" | |
"github.com/ewhal/nyaa/config" | |
"github.com/ewhal/nyaa/db" | |
"github.com/ewhal/nyaa/model" | |
serviceBase "github.com/ewhal/nyaa/service" | |
torrentService "github.com/ewhal/nyaa/service/torrent" | |
"github.com/ewhal/nyaa/util" | |
"errors" | |
"fmt" | |
"flag" | |
"time" | |
"strings" | |
) | |
const ( | |
QUEUE_SIZE = 10 | |
TIMEOUT = 60 | |
) | |
var client *torrent.Client | |
type MetadataFetcher struct { | |
dbEntry model.Torrent | |
torrent *torrent.Torrent | |
done bool | |
} | |
type Result struct { | |
fetcher *MetadataFetcher | |
err error | |
info *metainfo.Info | |
} | |
func NewFetcher(dbEntry model.Torrent) (f *MetadataFetcher) { | |
f = &MetadataFetcher{dbEntry, nil, false} | |
return | |
} | |
func (f *MetadataFetcher) Fetch(out chan Result) { | |
go func(fetcher *MetadataFetcher) { | |
magnet := util.InfoHashToMagnet(strings.TrimSpace(fetcher.dbEntry.Hash), fetcher.dbEntry.Name, config.Trackers...) | |
T, err := client.AddMagnet(magnet) | |
if err != nil { | |
fetcher.done = true | |
out <- Result{fetcher, err, nil} | |
return | |
} | |
fetcher.torrent = T | |
<-T.GotInfo() | |
fetcher.done = true | |
T.Drop() | |
out <- Result{fetcher, nil, T.Info()} | |
}(f) | |
go func(fetcher *MetadataFetcher) { | |
time.Sleep(TIMEOUT * time.Second) | |
if !fetcher.done { | |
if fetcher.torrent != nil { | |
fetcher.torrent.Drop() | |
} | |
out <- Result{fetcher, errors.New("Timeout"), nil} | |
} | |
}(f) | |
} | |
var queue []*MetadataFetcher | |
var failed map[uint]struct{} // Store the torrent ID of the torrents we already fetched data | |
func RemoveFromQueue(fetcher *MetadataFetcher) (removed bool){ | |
removed = false | |
for i, f := range queue { | |
if fetcher == f { | |
removed = true | |
queue = append(queue[:i], queue[i+1:]...) | |
break; | |
} | |
} | |
return | |
} | |
func IsBeingFetchedOrHasAlreadyFailed(t model.Torrent) bool { | |
for _, fetcher := range queue { | |
if t.ID == fetcher.dbEntry.ID { | |
return true | |
} | |
} | |
_, ok := failed[t.ID]; | |
return ok | |
} | |
func FillQueue(startFetcher bool, out chan Result) (noMoreTorrents bool) { | |
noMoreTorrents = false | |
remainingToFill := QUEUE_SIZE - len(queue) | |
if remainingToFill <= 0 { | |
return | |
} | |
params := serviceBase.CreateWhereParams("filesize IS NULL") | |
torrents, count, err := torrentService.GetTorrents(params, QUEUE_SIZE, len(failed)) | |
if err != nil { | |
panic(fmt.Sprintf("Failed to fetch torrents, %v", err)) | |
} | |
if count == 0 { | |
noMoreTorrents = true | |
return | |
} | |
noMoreTorrents = true | |
for _, T := range torrents { | |
if IsBeingFetchedOrHasAlreadyFailed(T) { | |
continue; | |
} | |
noMoreTorrents = false | |
fmt.Printf("Adding %s (ID: %d) to queue...\n", T.Name, T.ID) | |
fetcher := NewFetcher(T) | |
queue = append(queue, fetcher) | |
if startFetcher { | |
fetcher.Fetch(out) | |
} | |
} | |
return | |
} | |
func main() { | |
failed = make(map[uint]struct{}) | |
var r Result | |
// Initialize nyaa db | |
nyaaConfig := config.New() | |
processFlags := nyaaConfig.BindFlags() | |
flag.Parse() | |
err := processFlags() | |
if err != nil { | |
panic(err.Error()) | |
} | |
db.ORM, err = db.GormInit(nyaaConfig) | |
if err != nil { | |
panic(err.Error()) | |
} | |
db.ORM.LogMode(false) // Disable message spam | |
client, err = torrent.NewClient(nil) | |
if err != nil { | |
panic(fmt.Sprintf("Failed to start torrent client, %v", err)) | |
} | |
results := make(chan Result) | |
noMoreTorrents := FillQueue(true, results) | |
for !noMoreTorrents { | |
r = <-results | |
dbEntry := r.fetcher.dbEntry | |
info := r.info | |
updatedSuccessfully := false | |
if r.err != nil { | |
fmt.Printf("[WARNING] Failed to get metadata for %s (ID: %d), error is %s\n", dbEntry.Name, dbEntry.ID, r.err.Error()) | |
} else if info.Length == 0 { | |
fmt.Printf("[WARNING] %s (ID: %d) - Got no error, but length is 0. Bug?\n", dbEntry.Name, dbEntry.ID) | |
} else { | |
dbEntry.Filesize = info.Length | |
_, err = torrentService.UpdateTorrent(dbEntry) | |
if err == nil { | |
updatedSuccessfully = true | |
fmt.Printf("Torrent %s (ID: %d) updated successfully! Length is %d bytes (%s)\n", dbEntry.Name, dbEntry.ID, info.Length, util.FormatFilesize2(info.Length)) | |
} else { | |
fmt.Printf("[WARNING] Torrent %s (ID: %d) couldn't be updated! Length is %d bytes (%s)\n", dbEntry.Name, dbEntry.ID, info.Length, util.FormatFilesize2(info.Length)) | |
} | |
} | |
if !updatedSuccessfully { | |
failed[dbEntry.ID] = struct{}{} | |
} | |
RemoveFromQueue(r.fetcher) | |
noMoreTorrents = FillQueue(true, results) | |
} | |
fmt.Printf("Finished!\n") | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment