func getMetaInfo(torrent string) (metaInfo *MetaInfo, err os.Error) {
	var input io.ReadCloser
	if strings.HasPrefix(torrent, "http:") {
		// 6g compiler bug prevents us from writing r, _, err :=
		var r *http.Response
		if r, _, err = http.Get(torrent); err != nil {
			return
		}
		input = r.Body
	} else {
		if input, err = os.Open(torrent, os.O_RDONLY, 0666); err != nil {
			return
		}
	}

	// We need to calcuate the sha1 of the Info map, including every value in the
	// map. The easiest way to do this is to read the data using the Decode
	// API, and then pick through it manually.
	var m interface{}
	m, err = bencode.Decode(input)
	input.Close()
	if err != nil {
		err = os.NewError("Couldn't parse torrent file phase 1: " + err.String())
		return
	}

	topMap, ok := m.(map[string]interface{})
	if !ok {
		err = os.NewError("Couldn't parse torrent file phase 2.")
		return
	}

	infoMap, ok := topMap["info"]
	if !ok {
		err = os.NewError("Couldn't parse torrent file. info")
		return
	}
	var b bytes.Buffer
	if err = bencode.Marshal(&b, infoMap); err != nil {
		return
	}
	hash := sha1.New()
	hash.Write(b.Bytes())

	var m2 MetaInfo
	err = bencode.Unmarshal(&b, &m2.Info)
	if err != nil {
		return
	}

	m2.InfoHash = string(hash.Sum())
	m2.Announce = getString(topMap, "announce")
	m2.CreationDate = getString(topMap, "creation date")
	m2.Comment = getString(topMap, "comment")
	m2.CreatedBy = getString(topMap, "created by")
	m2.Encoding = getString(topMap, "encoding")

	metaInfo = &m2
	return
}
Exemple #2
0
// TODO: this is a misnomer...
func (cm *CallManager) EncodePayload(rpc *RPC) []byte {
	buf := bytes.NewBuffer(nil)

	//cm.logger.Logf("encoding payload of call %d\n", rpc.Header.Call)

	bencode.Marshal(buf, rpc.Payload)
	b := buf.Bytes()
	/*if len(b) == 0 {
		b = make([]byte, 2)
		b[0] = 'l'
		b[1] = 'e'
	}*/
	return b
}