283 lignes
7,2 Kio
Go
283 lignes
7,2 Kio
Go
package router
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import (
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"encoding/base32"
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"encoding/hex"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"mime/multipart"
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"net/http"
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"net/url"
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"os"
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"regexp"
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"strconv"
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"strings"
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"github.com/NyaaPantsu/nyaa/cache"
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"github.com/NyaaPantsu/nyaa/config"
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"github.com/NyaaPantsu/nyaa/service/upload"
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"github.com/NyaaPantsu/nyaa/util"
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"github.com/NyaaPantsu/nyaa/util/metainfo"
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"github.com/microcosm-cc/bluemonday"
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"github.com/zeebo/bencode"
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)
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// Use this, because we seem to avoid using models, and we would need
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// the torrent ID to create the File in the DB
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type UploadedFile struct {
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Path []string
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Filesize int64
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}
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// UploadForm serializing HTTP form for torrent upload
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type UploadForm struct {
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Name string
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Magnet string
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Category string
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Remake bool
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Description string
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Status int
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CaptchaID string
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Infohash string
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CategoryID int
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SubCategoryID int
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Filesize int64
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Filepath string
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FileList []UploadedFile
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}
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// TODO: these should be in another package (?)
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// form names
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const UploadFormName = "name"
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const UploadFormTorrent = "torrent"
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const UploadFormMagnet = "magnet"
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const UploadFormCategory = "c"
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const UploadFormRemake = "remake"
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const UploadFormDescription = "desc"
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const UploadFormStatus = "status"
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// error indicating that you can't send both a magnet link and torrent
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var ErrTorrentPlusMagnet = errors.New("upload either a torrent file or magnet link, not both")
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// error indicating a torrent is private
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var ErrPrivateTorrent = errors.New("torrent is private")
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// error indicating a problem with its trackers
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var ErrTrackerProblem = errors.New("torrent does not have any (working) trackers: https://" + config.WebAddress + "/faq#trackers")
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// error indicating a torrent's name is invalid
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var ErrInvalidTorrentName = errors.New("torrent name is invalid")
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// error indicating a torrent's description is invalid
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var ErrInvalidTorrentDescription = errors.New("torrent description is invalid")
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// error indicating a torrent's category is invalid
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var ErrInvalidTorrentCategory = errors.New("torrent category is invalid")
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var p = bluemonday.UGCPolicy()
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/**
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UploadForm.ExtractInfo takes an http request and computes all fields for this form
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*/
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func (f *UploadForm) ExtractInfo(r *http.Request) error {
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f.Name = r.FormValue(UploadFormName)
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f.Category = r.FormValue(UploadFormCategory)
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f.Description = r.FormValue(UploadFormDescription)
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f.Status, _ = strconv.Atoi(r.FormValue(UploadFormStatus))
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f.Magnet = r.FormValue(UploadFormMagnet)
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f.Remake = r.FormValue(UploadFormRemake) == "on"
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// trim whitespace
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f.Name = util.TrimWhitespaces(f.Name)
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f.Description = p.Sanitize(util.TrimWhitespaces(f.Description))
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f.Magnet = util.TrimWhitespaces(f.Magnet)
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cache.Impl.ClearAll()
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catsSplit := strings.Split(f.Category, "_")
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// need this to prevent out of index panics
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if len(catsSplit) == 2 {
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CatID, err := strconv.Atoi(catsSplit[0])
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if err != nil {
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return ErrInvalidTorrentCategory
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}
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SubCatID, err := strconv.Atoi(catsSplit[1])
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if err != nil {
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return ErrInvalidTorrentCategory
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}
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f.CategoryID = CatID
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f.SubCategoryID = SubCatID
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} else {
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return ErrInvalidTorrentCategory
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}
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// first: parse torrent file (if any) to fill missing information
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tfile, _, err := r.FormFile(UploadFormTorrent)
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if err == nil {
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var torrent metainfo.TorrentFile
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// decode torrent
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_, seekErr := tfile.Seek(0, io.SeekStart)
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if seekErr != nil {
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return seekErr
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}
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err = bencode.NewDecoder(tfile).Decode(&torrent)
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if err != nil {
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return metainfo.ErrInvalidTorrentFile
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}
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// check a few things
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if torrent.IsPrivate() {
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return ErrPrivateTorrent
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}
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trackers := torrent.GetAllAnnounceURLS()
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if !uploadService.CheckTrackers(trackers) {
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return ErrTrackerProblem
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}
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// Name
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if len(f.Name) == 0 {
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f.Name = torrent.TorrentName()
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}
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// Magnet link: if a file is provided it should be empty
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if len(f.Magnet) != 0 {
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return ErrTorrentPlusMagnet
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}
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binInfohash, err := torrent.Infohash()
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if err != nil {
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return err
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}
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f.Infohash = strings.ToUpper(hex.EncodeToString(binInfohash[:]))
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f.Magnet = util.InfoHashToMagnet(f.Infohash, f.Name, trackers...)
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// extract filesize
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f.Filesize = int64(torrent.TotalSize())
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// extract filelist
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fileInfos := torrent.Info.GetFiles()
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for _, fileInfo := range fileInfos {
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f.FileList = append(f.FileList, UploadedFile{
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Path: fileInfo.Path,
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Filesize: int64(fileInfo.Length),
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})
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}
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} else {
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// No torrent file provided
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magnetUrl, err := url.Parse(string(f.Magnet)) //?
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if err != nil {
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return err
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}
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xt := magnetUrl.Query().Get("xt")
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if !strings.HasPrefix(xt, "urn:btih:") {
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return errors.New("incorrect magnet")
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}
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xt = strings.SplitAfter(xt, ":")[2]
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f.Infohash = strings.ToUpper(strings.Split(xt, "&")[0])
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isBase32, err := regexp.MatchString("^[2-7A-Z]{32}$", f.Infohash)
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if err != nil {
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return err
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}
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if !isBase32 {
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isBase16, err := regexp.MatchString("^[0-9A-F]{40}$", f.Infohash)
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if err != nil {
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return err
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}
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if !isBase16 {
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return errors.New("incorrect hash")
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}
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} else {
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//convert to base16
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data, err := base32.StdEncoding.DecodeString(f.Infohash)
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if err != nil {
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return err
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}
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hash16 := make([]byte, hex.EncodedLen(len(data)))
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hex.Encode(hash16, data)
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f.Infohash = strings.ToUpper(string(hash16))
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}
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f.Filesize = 0
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f.Filepath = ""
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}
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// then actually check that we have everything we need
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if len(f.Name) == 0 {
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return ErrInvalidTorrentName
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}
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// after data has been checked & extracted, write it to disk
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if len(config.TorrentFileStorage) > 0 {
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err := WriteTorrentToDisk(tfile, f.Infohash+".torrent", &f.Filepath)
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if err != nil {
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return err
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}
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} else {
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f.Filepath = ""
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}
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return nil
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}
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func (f *UploadForm) ExtractEditInfo(r *http.Request) error {
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f.Name = r.FormValue(UploadFormName)
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f.Category = r.FormValue(UploadFormCategory)
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f.Description = r.FormValue(UploadFormDescription)
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f.Status, _ = strconv.Atoi(r.FormValue(UploadFormStatus))
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// trim whitespace
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f.Name = util.TrimWhitespaces(f.Name)
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f.Description = p.Sanitize(util.TrimWhitespaces(f.Description))
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catsSplit := strings.Split(f.Category, "_")
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// need this to prevent out of index panics
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if len(catsSplit) == 2 {
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CatID, err := strconv.Atoi(catsSplit[0])
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if err != nil {
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return ErrInvalidTorrentCategory
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}
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SubCatID, err := strconv.Atoi(catsSplit[1])
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if err != nil {
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return ErrInvalidTorrentCategory
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}
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f.CategoryID = CatID
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f.SubCategoryID = SubCatID
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} else {
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return ErrInvalidTorrentCategory
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}
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return nil
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}
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func WriteTorrentToDisk(file multipart.File, name string, fullpath *string) error {
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_, seekErr := file.Seek(0, io.SeekStart)
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if seekErr != nil {
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return seekErr
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}
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b, err := ioutil.ReadAll(file)
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if err != nil {
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return err
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}
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*fullpath = fmt.Sprintf("%s%c%s", config.TorrentFileStorage, os.PathSeparator, name)
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return ioutil.WriteFile(*fullpath, b, 0644)
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}
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// NewUploadForm creates a new upload form given parameters as list
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func NewUploadForm(params ...string) (uploadForm UploadForm) {
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if len(params) > 1 {
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uploadForm.Category = params[0]
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} else {
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uploadForm.Category = "3_12"
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}
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if len(params) > 2 {
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uploadForm.Description = params[1]
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} else {
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uploadForm.Description = "Description"
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}
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return
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}
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