81 lines
1.8 KiB
Go
81 lines
1.8 KiB
Go
package main
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import (
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"bytes"
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"fmt"
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"io"
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"net/http"
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"time"
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"github.com/andreimarcu/linx-server/backends"
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"github.com/andreimarcu/linx-server/expiry"
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"github.com/andreimarcu/linx-server/torrent"
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"github.com/zeebo/bencode"
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"github.com/zenazn/goji/web"
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)
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func createTorrent(fileName string, f io.Reader, r *http.Request) ([]byte, error) {
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url := getSiteURL(r) + Config.selifPath + fileName
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chunk := make([]byte, torrent.TORRENT_PIECE_LENGTH)
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t := torrent.Torrent{
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Encoding: "UTF-8",
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Info: torrent.TorrentInfo{
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PieceLength: torrent.TORRENT_PIECE_LENGTH,
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Name: fileName,
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},
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UrlList: []string{url},
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}
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for {
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n, err := io.ReadFull(f, chunk)
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if err == io.EOF {
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break
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} else if err != nil && err != io.ErrUnexpectedEOF {
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return []byte{}, err
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}
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t.Info.Length += n
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t.Info.Pieces += string(torrent.HashPiece(chunk[:n]))
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}
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data, err := bencode.EncodeBytes(&t)
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if err != nil {
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return []byte{}, err
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}
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return data, nil
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}
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func fileTorrentHandler(c web.C, w http.ResponseWriter, r *http.Request) {
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fileName := c.URLParams["name"]
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metadata, f, err := storageBackend.Get(fileName)
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if err == backends.NotFoundErr {
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notFoundHandler(c, w, r)
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return
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} else if err == backends.BadMetadata {
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oopsHandler(c, w, r, RespAUTO, "Corrupt metadata.")
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return
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} else if err != nil {
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oopsHandler(c, w, r, RespAUTO, err.Error())
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return
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}
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defer f.Close()
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if expiry.IsTsExpired(metadata.Expiry) {
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storageBackend.Delete(fileName)
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notFoundHandler(c, w, r)
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return
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}
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encoded, err := createTorrent(fileName, f, r)
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if err != nil {
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oopsHandler(c, w, r, RespHTML, "Could not create torrent.")
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return
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}
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w.Header().Set(`Content-Disposition`, fmt.Sprintf(`attachment; filename="%s.torrent"`, fileName))
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http.ServeContent(w, r, "", time.Now(), bytes.NewReader(encoded))
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}
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