dotcloud/docker

package client // import "github.com/docker/docker/client"

import (
    "context"
    "io"
    "net/url"
)

// ContainerExport retrieves the raw contents of a container
// and returns them as an io.ReadCloser. It's up to the caller
// to close the stream.
func (cli *Client) ContainerExport(ctx context.Context, containerID string) (io.ReadCloser, error) {
    serverResp, err := cli.get(ctx, "/containers/"+containerID+"/export", url.Values{}, nil)
    if err != nil {
        return nil, err
    }

    return serverResp.body, nil
}