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// +build varlink
package varlinkapi
import (
"bufio"
"fmt"
"io"
"io/ioutil"
"os"
iopodman "github.com/containers/libpod/pkg/varlink"
"github.com/sirupsen/logrus"
)
// SendFile allows a client to send a file to the varlink server
func (i *VarlinkAPI) SendFile(call iopodman.VarlinkCall, ftype string, length int64) error {
if !call.WantsUpgrade() {
return call.ReplyErrorOccurred("client must use upgraded connection to send files")
}
outputFile, err := ioutil.TempFile("", "varlink_send")
if err != nil {
return call.ReplyErrorOccurred(err.Error())
}
defer outputFile.Close()
if err = call.ReplySendFile(outputFile.Name()); err != nil {
// If an error occurs while sending the reply, return the error
return err
}
writer := bufio.NewWriter(outputFile)
defer writer.Flush()
reader := call.Call.Reader
if _, err := io.CopyN(writer, reader, length); err != nil {
return err
}
logrus.Debugf("successfully received %s", outputFile.Name())
// Send an ACK to the client
call.Call.Writer.WriteString(fmt.Sprintf("%s:", outputFile.Name()))
call.Call.Writer.Flush()
return nil
}
// ReceiveFile allows the varlink server to send a file to a client
func (i *VarlinkAPI) ReceiveFile(call iopodman.VarlinkCall, filepath string, delete bool) error {
if !call.WantsUpgrade() {
return call.ReplyErrorOccurred("client must use upgraded connection to send files")
}
fs, err := os.Open(filepath)
if err != nil {
return call.ReplyErrorOccurred(err.Error())
}
fileInfo, err := fs.Stat()
if err != nil {
return call.ReplyErrorOccurred(err.Error())
}
// Send the file length down to client
// Varlink connection upgraded
if err = call.ReplyReceiveFile(fileInfo.Size()); err != nil {
// If an error occurs while sending the reply, return the error
return err
}
reader := bufio.NewReader(fs)
_, err = reader.WriteTo(call.Writer)
if err != nil {
return err
}
if delete {
if err := os.Remove(filepath); err != nil {
return err
}
}
return call.Writer.Flush()
}
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