Add initial support for resource and info forks

[rbdr/mobius] / hotline / transfer.go

diff --git a/hotline/transfer.go b/hotline/transfer.go
index b8bec1dd9122b40540f48ac033c0c026c0e830b6..73331970e33648900b0642de8754a234da933f0f 100644 (file)
--- 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
+               }
+       }
+
+}