X-Git-Url: https://git.r.bdr.sh/rbdr/mobius/blobdiff_plain/5c34f8752938764668d829fb284626b9c62c5475..02b446d81d53ba3ccd4175917a62563bbda54199:/hotline/transfer.go

diff --git a/hotline/transfer.go b/hotline/transfer.go
index b8bec1d..7333197 100644
--- a/hotline/transfer.go
+++ b/hotline/transfer.go
@@ -1,50 +1,100 @@
 package hotline
 
 import (
+	"bufio"
 	"bytes"
 	"encoding/binary"
 	"errors"
+	"io"
 )
 
-type Transfer struct {
+type transfer struct {
 	Protocol        [4]byte // "HTXF" 0x48545846
 	ReferenceNumber [4]byte // Unique ID generated for the transfer
 	DataSize        [4]byte // File size
 	RSVD            [4]byte // Not implemented in Hotline Protocol
 }
 
-func NewReadTransfer(b []byte) (Transfer, error) {
-	r := bytes.NewReader(b)
-	var transfer Transfer
+var HTXF = [4]byte{0x48, 0x54, 0x58, 0x46} // (HTXF) is the only supported transfer protocol
 
-	if err := binary.Read(r, binary.BigEndian, &transfer); err != nil {
-		return transfer, err
+func (tf *transfer) Write(b []byte) (int, error) {
+	if err := binary.Read(bytes.NewReader(b), binary.BigEndian, tf); err != nil {
+		return 0, err
 	}
 
-	// 0x48545846 (HTXF) is the only supported transfer protocol
-	if transfer.Protocol != [4]byte{0x48, 0x54, 0x58, 0x46} {
-		return transfer, errors.New("invalid protocol")
+	if tf.Protocol != HTXF {
+		return 0, errors.New("invalid protocol")
 	}
 
-	return transfer, nil
+	return len(b), nil
 }
 
-//
-//type FolderTransfer struct {
-//	Protocol        [4]byte // "HTXF" 0x48545846
-//	ReferenceNumber [4]byte // Unique ID generated for the transfer
-//	DataSize        [4]byte // File size
-//	RSVD            [4]byte // Not implemented in Hotline Protocol
-//	Action          [2]byte // Next file action
-//}
-//
-//func ReadFolderTransfer(b []byte) (FolderTransfer, error) {
-//	r := bytes.NewReader(b)
-//	var decodedEvent FolderTransfer
-//
-//	if err := binary.Read(r, binary.BigEndian, &decodedEvent); err != nil {
-//		return decodedEvent, err
-//	}
-//
-//	return decodedEvent, nil
-//}
+const fileCopyBufSize = 4096
+
+func receiveFile(r io.Reader, targetFile, resForkFile, infoFork io.Writer) error {
+	var ffo flattenedFileObject
+	if _, err := ffo.ReadFrom(r); err != nil {
+		return err
+	}
+
+	// Write the information fork
+	_, err := infoFork.Write(ffo.FlatFileInformationFork.MarshalBinary())
+	if err != nil {
+		return err
+	}
+
+	// read and write the data fork
+	bw := bufio.NewWriterSize(targetFile, fileCopyBufSize)
+	if _, err = io.CopyN(bw, r, ffo.dataSize()); err != nil {
+		return err
+	}
+	if err := bw.Flush(); err != nil {
+		return err
+	}
+
+	if ffo.FlatFileHeader.ForkCount == [2]byte{0, 3} {
+		if err := binary.Read(r, binary.BigEndian, &ffo.FlatFileResForkHeader); err != nil {
+			return err
+		}
+
+		bw = bufio.NewWriterSize(resForkFile, fileCopyBufSize)
+		_, err = io.CopyN(resForkFile, r, ffo.rsrcSize())
+		if err != nil {
+			return err
+		}
+		if err := bw.Flush(); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func sendFile(w io.Writer, r io.Reader, offset int) (err error) {
+	br := bufio.NewReader(r)
+	if _, err := br.Discard(offset); err != nil {
+		return err
+	}
+
+	rSendBuffer := make([]byte, 1024)
+	for {
+		var bytesRead int
+
+		if bytesRead, err = br.Read(rSendBuffer); err == io.EOF {
+			if _, err := w.Write(rSendBuffer[:bytesRead]); err != nil {
+				return err
+			}
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+		// totalSent += int64(bytesRead)
+
+		// fileTransfer.BytesSent += bytesRead
+
+		if _, err := w.Write(rSendBuffer[:bytesRead]); err != nil {
+			return err
+		}
+	}
+
+}