podman-remote import|export

addition of import and export for the podman-remote client.  This includes
the ability to send and receive files between the remote-client and the
"podman" host using an upgraded varlink connection.

Signed-off-by: baude <bbaude@redhat.com>

3 files changed, 96 insertions, 4 deletions

diff --git a/pkg/varlinkapi/containers.go b/pkg/varlinkapi/containers.go
index a01e3cc2b..737e2dd96 100644
--- a/pkg/varlinkapi/containers.go
+++ b/pkg/varlinkapi/containers.go
@@ -5,6 +5,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"os"
 	"syscall"
 	"time"
@@ -194,15 +195,25 @@ func (i *LibpodAPI) ListContainerChanges(call iopodman.VarlinkCall, name string)
 }
 
 // ExportContainer ...
-func (i *LibpodAPI) ExportContainer(call iopodman.VarlinkCall, name, path string) error {
+func (i *LibpodAPI) ExportContainer(call iopodman.VarlinkCall, name, outPath string) error {
 	ctr, err := i.Runtime.LookupContainer(name)
 	if err != nil {
 		return call.ReplyContainerNotFound(name)
 	}
-	if err := ctr.Export(path); err != nil {
+	outputFile, err := ioutil.TempFile("", "varlink_recv")
+	if err != nil {
+		return call.ReplyErrorOccurred(err.Error())
+	}
+
+	defer outputFile.Close()
+	if outPath == "" {
+		outPath = outputFile.Name()
+	}
+	if err := ctr.Export(outPath); err != nil {
 		return call.ReplyErrorOccurred(err.Error())
 	}
-	return call.ReplyExportContainer(path)
+	return call.ReplyExportContainer(outPath)
+
 }
 
 // GetContainerStats ...
diff --git a/pkg/varlinkapi/images.go b/pkg/varlinkapi/images.go
index 0ab645802..5e0889645 100644
--- a/pkg/varlinkapi/images.go
+++ b/pkg/varlinkapi/images.go
@@ -500,7 +500,7 @@ func (i *LibpodAPI) Commit(call iopodman.VarlinkCall, name, imageName string, ch
 }
 
 // ImportImage imports an image from a tarball to the image store
-func (i *LibpodAPI) ImportImage(call iopodman.VarlinkCall, source, reference, message string, changes []string) error {
+func (i *LibpodAPI) ImportImage(call iopodman.VarlinkCall, source, reference, message string, changes []string, delete bool) error {
 	configChanges, err := util.GetImageConfig(changes)
 	if err != nil {
 		return call.ReplyErrorOccurred(err.Error())
@@ -516,6 +516,12 @@ func (i *LibpodAPI) ImportImage(call iopodman.VarlinkCall, source, reference, me
 	if err != nil {
 		return call.ReplyErrorOccurred(err.Error())
 	}
+	if delete {
+		if err := os.Remove(source); err != nil {
+			return call.ReplyErrorOccurred(err.Error())
+		}
+	}
+
 	return call.ReplyImportImage(newImage.ID())
 }
 
diff --git a/pkg/varlinkapi/transfers.go b/pkg/varlinkapi/transfers.go
new file mode 100644
index 000000000..0cb7e5e2e
--- /dev/null
+++ b/pkg/varlinkapi/transfers.go
@@ -0,0 +1,75 @@
+package varlinkapi
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+
+	"github.com/containers/libpod/cmd/podman/varlink"
+)
+
+// SendFile allows a client to send a file to the varlink server
+func (i *LibpodAPI) 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 {
+		return call.ReplyErrorOccurred(err.Error())
+	}
+
+	writer := bufio.NewWriter(outputFile)
+	defer writer.Flush()
+
+	reader := call.Call.Reader
+	if _, err := io.CopyN(writer, reader, length); err != nil {
+		return err
+	}
+
+	// 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 *LibpodAPI) 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 upraded
+	if err = call.ReplyReceiveFile(fileInfo.Size()); err != nil {
+		return call.ReplyErrorOccurred(err.Error())
+	}
+
+	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()
+}