Albirew/nyaa-pantsu
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nyaa-pantsu/router/upload.go
Ramon Dantas f351c2b047 Store torrent FileList info as bencoded data. (#530)
Use this instead of joining with forward-slashes because it's possible
that a torrent uses "foo/bar" as a filename or part of the directory list.
2017-05-16 07:45:47 +10:00

283 lignes
7,1 Kio
Go

package router
import (
"encoding/base32"
"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/upload"
"github.com/ewhal/nyaa/util"
"github.com/ewhal/nyaa/util/metainfo"
"github.com/microcosm-cc/bluemonday"
"github.com/zeebo/bencode"
)
// Use this, because we seem to avoid using models, and we would need
// the torrent ID to create the File in the DB
type UploadedFile struct {
Path []string
Filesize int64
}
// UploadForm serializing HTTP form for torrent upload
type UploadForm struct {
Name string
Magnet string
Category string
Remake bool
Description string
Status int
CaptchaID string
Infohash string
CategoryID int
SubCategoryID int
Filesize int64
Filepath string
FileList []UploadedFile
}
// 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"
const UploadFormStatus = "status"
// 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.Status, _ = strconv.Atoi(r.FormValue(UploadFormStatus))
f.Magnet = r.FormValue(UploadFormMagnet)
f.Remake = r.FormValue(UploadFormRemake) == "on"
// trim whitespace
f.Name = util.TrimWhitespaces(f.Name)
f.Description = p.Sanitize(util.TrimWhitespaces(f.Description))
f.Magnet = util.TrimWhitespaces(f.Magnet)
cache.Impl.ClearAll()
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 !uploadService.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())
// extract filelist
fileInfos := torrent.Info.GetFiles()
for _, fileInfo := range fileInfos {
f.FileList = append(f.FileList, UploadedFile{
Path: fileInfo.Path,
Filesize: int64(fileInfo.Length),
})
}
} else {
// No torrent file provided
magnetUrl, err := url.Parse(string(f.Magnet)) //?
if err != nil {
return err
}
xt := magnetUrl.Query().Get("xt")
if !strings.HasPrefix(xt, "urn:btih:") {
return errors.New("incorrect magnet")
}
xt = strings.SplitAfter(xt, ":")[2]
f.Infohash = strings.ToUpper(strings.Split(xt, "&")[0])
isBase32, err := regexp.MatchString("^[2-7A-Z]{32}$", f.Infohash)
if err != nil {
return err
}
if !isBase32 {
isBase16, err := regexp.MatchString("^[0-9A-F]{40}$", f.Infohash)
if err != nil {
return err
}
if !isBase16 {
return errors.New("incorrect hash")
}
} else {
//convert to base16
data, err := base32.StdEncoding.DecodeString(f.Infohash)
if err != nil {
return err
}
hash16 := make([]byte, hex.EncodedLen(len(data)))
hex.Encode(hash16, data)
f.Infohash = strings.ToUpper(string(hash16))
}
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 (f *UploadForm) ExtractEditInfo(r *http.Request) error {
f.Name = r.FormValue(UploadFormName)
f.Category = r.FormValue(UploadFormCategory)
f.Description = r.FormValue(UploadFormDescription)
f.Status, _ = strconv.Atoi(r.FormValue(UploadFormStatus))
// trim whitespace
f.Name = util.TrimWhitespaces(f.Name)
f.Description = p.Sanitize(util.TrimWhitespaces(f.Description))
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
}
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)
}
// 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
}