Albirew/nyaa-pantsu
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nyaa-pantsu/router/upload.go
Jeff Becker c088cb2642 add torrent file parsing for upload form
* vendor bencode library github.com/zeebo/bencode

* add metainfo parsing library from XD

* fix up upload handler so to be less cluttered
2017-05-06 07:43:24 -04:00

106 lignes
2,5 Kio
Go

package router
import (
"errors"
"github.com/ewhal/nyaa/util"
"github.com/ewhal/nyaa/util/metainfo"
"github.com/zeebo/bencode"
"net/http"
)
// UploadForm serializing HTTP form for torrent upload
type UploadForm struct {
Name string
Magnet string
Category string
Description string
}
// TODO: these should be in another package (?)
// form value for torrent name
const UploadFormName = "name"
// form value for torrent file
const UploadFormTorrent = "torrent"
// form value for magnet uri (?)
const UploadFormMagnet = "magnet"
// form value for category
const UploadFormCategory = "c"
// form value for description
const UploadFormDescription = "desc"
// error indicating a torrent is private
var ErrPrivateTorrent = errors.New("torrent is private")
// 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")
/**
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)
// trim whitespaces
f.Name = util.TrimWhitespaces(f.Name)
f.Description = util.TrimWhitespaces(f.Description)
f.Magnet = util.TrimWhitespaces(f.Magnet)
if len(f.Name) == 0 {
return ErrInvalidTorrentName
}
if len(f.Description) == 0 {
return ErrInvalidTorrentDescription
}
if len(f.Magnet) == 0 {
// try parsing torrent file if provided if no magnet is specified
tfile, _, err := r.FormFile(UploadFormTorrent)
if err != nil {
return err
}
var torrent metainfo.TorrentFile
// decode torrent
err = bencode.NewDecoder(tfile).Decode(&torrent)
if err != nil {
return metainfo.ErrInvalidTorrentFile
}
// check if torrent is private
if torrent.IsPrivate() {
return ErrPrivateTorrent
}
// generate magnet
f.Magnet = util.InfoHashToMagnet(torrent.Infohash(), f.Name)
}
return nil
}
// 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
}