Albirew/nyaa-pantsu
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Ce dépôt a été archivé le 2022-05-07. Vous pouvez voir ses fichiers ou le cloner, mais pas ouvrir de ticket ou de demandes d'ajout, ni soumettre de changements.
nyaa-pantsu/router/upload.go
2017-05-10 22:11:37 +02:00

248 lignes
6,2 Kio
Go

package router
import (
"encoding/hex"
"errors"
"fmt"
"io"
"io/ioutil"
"mime/multipart"
"net/http"
"net/url"
"os"
"regexp"
"strconv"
"strings"
"github.com/ewhal/nyaa/cache"
"github.com/ewhal/nyaa/config"
"github.com/ewhal/nyaa/service/captcha"
"github.com/ewhal/nyaa/util"
"github.com/ewhal/nyaa/util/metainfo"
"github.com/microcosm-cc/bluemonday"
"github.com/zeebo/bencode"
)
// UploadForm serializing HTTP form for torrent upload
type UploadForm struct {
Name string
Magnet string
Category string
Remake bool
Description string
captcha.Captcha
Infohash string
CategoryID int
SubCategoryID int
Filesize int64
Filepath string
}
// TODO: these should be in another package (?)
// form names
const UploadFormName = "name"
const UploadFormTorrent = "torrent"
const UploadFormMagnet = "magnet"
const UploadFormCategory = "c"
const UploadFormRemake = "remake"
const UploadFormDescription = "desc"
// error indicating that you can't send both a magnet link and torrent
var ErrTorrentPlusMagnet = errors.New("upload either a torrent file or magnet link, not both")
// error indicating a torrent is private
var ErrPrivateTorrent = errors.New("torrent is private")
// error indicating a problem with its trackers
var ErrTrackerProblem = errors.New("torrent does not have any (working) trackers: https://" + config.WebAddress + "/faq#trackers")
// error indicating a torrent's name is invalid
var ErrInvalidTorrentName = errors.New("torrent name is invalid")
// error indicating a torrent's description is invalid
var ErrInvalidTorrentDescription = errors.New("torrent description is invalid")
// error indicating a torrent's category is invalid
var ErrInvalidTorrentCategory = errors.New("torrent category is invalid")
var p = bluemonday.UGCPolicy()
/**
UploadForm.ExtractInfo takes an http request and computes all fields for this form
*/
func (f *UploadForm) ExtractInfo(r *http.Request) error {
f.Name = r.FormValue(UploadFormName)
f.Category = r.FormValue(UploadFormCategory)
f.Description = r.FormValue(UploadFormDescription)
f.Magnet = r.FormValue(UploadFormMagnet)
f.Remake = r.FormValue(UploadFormRemake) == "on"
f.Captcha = captcha.Extract(r)
if !captcha.Authenticate(f.Captcha) {
// TODO: Prettier passing of mistyped Captcha errors
return errors.New(captcha.ErrInvalidCaptcha.Error())
}
// trim whitespace
f.Name = util.TrimWhitespaces(f.Name)
f.Description = p.Sanitize(util.TrimWhitespaces(f.Description))
f.Magnet = util.TrimWhitespaces(f.Magnet)
cache.Clear()
catsSplit := strings.Split(f.Category, "_")
// need this to prevent out of index panics
if len(catsSplit) == 2 {
CatID, err := strconv.Atoi(catsSplit[0])
if err != nil {
return ErrInvalidTorrentCategory
}
SubCatID, err := strconv.Atoi(catsSplit[1])
if err != nil {
return ErrInvalidTorrentCategory
}
f.CategoryID = CatID
f.SubCategoryID = SubCatID
} else {
return ErrInvalidTorrentCategory
}
// first: parse torrent file (if any) to fill missing information
tfile, _, err := r.FormFile(UploadFormTorrent)
if err == nil {
var torrent metainfo.TorrentFile
// decode torrent
_, seekErr := tfile.Seek(0, io.SeekStart)
if seekErr != nil {
return seekErr
}
err = bencode.NewDecoder(tfile).Decode(&torrent)
if err != nil {
return metainfo.ErrInvalidTorrentFile
}
// check a few things
if torrent.IsPrivate() {
return ErrPrivateTorrent
}
trackers := torrent.GetAllAnnounceURLS()
if !CheckTrackers(trackers) {
return ErrTrackerProblem
}
// Name
if len(f.Name) == 0 {
f.Name = torrent.TorrentName()
}
// Magnet link: if a file is provided it should be empty
if len(f.Magnet) != 0 {
return ErrTorrentPlusMagnet
}
binInfohash, err := torrent.Infohash()
if err != nil {
return err
}
f.Infohash = strings.ToUpper(hex.EncodeToString(binInfohash[:]))
f.Magnet = util.InfoHashToMagnet(f.Infohash, f.Name, trackers...)
// extract filesize
f.Filesize = int64(torrent.TotalSize())
} else {
// No torrent file provided
magnetURL, parseErr := url.Parse(f.Magnet)
if parseErr != nil {
return metainfo.ErrInvalidTorrentFile
}
exactTopic := magnetURL.Query().Get("xt")
if !strings.HasPrefix(exactTopic, "urn:btih:") {
return metainfo.ErrInvalidTorrentFile
}
f.Infohash = strings.ToUpper(strings.TrimPrefix(exactTopic, "urn:btih:"))
matched, err := regexp.MatchString("^[0-9A-F]{40}$", f.Infohash)
if err != nil || !matched {
return metainfo.ErrInvalidTorrentFile
}
f.Filesize = 0
f.Filepath = ""
}
// then actually check that we have everything we need
if len(f.Name) == 0 {
return ErrInvalidTorrentName
}
// after data has been checked & extracted, write it to disk
if len(config.TorrentFileStorage) > 0 {
err := WriteTorrentToDisk(tfile, f.Infohash+".torrent", &f.Filepath)
if err != nil {
return err
}
} else {
f.Filepath = ""
}
return nil
}
func WriteTorrentToDisk(file multipart.File, name string, fullpath *string) error {
_, seekErr := file.Seek(0, io.SeekStart)
if seekErr != nil {
return seekErr
}
b, err := ioutil.ReadAll(file)
if err != nil {
return err
}
*fullpath = fmt.Sprintf("%s%c%s", config.TorrentFileStorage, os.PathSeparator, name)
return ioutil.WriteFile(*fullpath, b, 0644)
}
func CheckTrackers(trackers []string) bool {
// TODO: move to runtime configuration
var deadTrackers = []string{ // substring matches!
"://open.nyaatorrents.info:6544",
"://tracker.openbittorrent.com:80",
"://tracker.publicbt.com:80",
"://stats.anisource.net:2710",
"://exodus.desync.com",
"://open.demonii.com:1337",
"://tracker.istole.it:80",
"://tracker.ccc.de:80",
"://bt2.careland.com.cn:6969",
"://announce.torrentsmd.com:8080"}
var numGood int
for _, t := range trackers {
good := true
for _, check := range deadTrackers {
if strings.Contains(t, check) {
good = false
}
}
if good {
numGood++
}
}
return numGood > 0
}
// NewUploadForm creates a new upload form given parameters as list
func NewUploadForm(params ...string) (uploadForm UploadForm) {
if len(params) > 1 {
uploadForm.Category = params[0]
} else {
uploadForm.Category = "3_12"
}
if len(params) > 2 {
uploadForm.Description = params[1]
} else {
uploadForm.Description = "Description"
}
return
}