From f30cba0e0e8aeb0d37fc7ae5104e8c9e0ca74484 Mon Sep 17 00:00:00 2001
From: David Calavera <david.calavera@gmail.com>
Date: Thu, 3 Dec 2015 14:49:41 -0500
Subject: [PATCH] Implement docker export with standalone client lib.

Signed-off-by: David Calavera <david.calavera@gmail.com>
Upstream-commit: e0549b8cebee4dbe8614688767c9b666afdd32d9
Component: engine
---
 components/engine/api/client/export.go     | 13 ++++++-------
 components/engine/api/client/lib/export.go | 18 ++++++++++++++++++
 2 files changed, 24 insertions(+), 7 deletions(-)
 create mode 100644 components/engine/api/client/lib/export.go

diff --git a/components/engine/api/client/export.go b/components/engine/api/client/export.go
index 2763b7b045..ec94f6728e 100644
--- a/components/engine/api/client/export.go
+++ b/components/engine/api/client/export.go
@@ -2,6 +2,7 @@ package client
 
 import (
 	"errors"
+	"io"
 	"os"
 
 	Cli "github.com/docker/docker/cli"
@@ -33,14 +34,12 @@ func (cli *DockerCli) CmdExport(args ...string) error {
 		return errors.New("Cowardly refusing to save to a terminal. Use the -o flag or redirect.")
 	}
 
-	image := cmd.Arg(0)
-	sopts := &streamOpts{
-		rawTerminal: true,
-		out:         output,
-	}
-	if _, err := cli.stream("GET", "/containers/"+image+"/export", sopts); err != nil {
+	responseBody, err := cli.client.ContainerExport(cmd.Arg(0))
+	if err != nil {
 		return err
 	}
+	defer responseBody.Close()
 
-	return nil
+	_, err = io.Copy(output, responseBody)
+	return err
 }
diff --git a/components/engine/api/client/lib/export.go b/components/engine/api/client/lib/export.go
new file mode 100644
index 0000000000..6cb4d4a18d
--- /dev/null
+++ b/components/engine/api/client/lib/export.go
@@ -0,0 +1,18 @@
+package lib
+
+import (
+	"io"
+	"net/url"
+)
+
+// ContainerExport retrieves the raw contents of a container
+// and returns them as a io.ReadCloser. It's up to the caller
+// to close the stream.
+func (cli *Client) ContainerExport(containerID string) (io.ReadCloser, error) {
+	serverResp, err := cli.GET("/containers/"+containerID+"/export", url.Values{}, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	return serverResp.body, nil
+}