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065af9707c
Generated largely from the specified config; small parts taken from `docker image inspect`, such as the command line. Renamed some of the yaml keys to match the OCI spec rather than Docker Compose as we decided they are more readable, no more underscores. Add some extra functionality - tmpfs specification - fully general mount specification - no new privileges can be specified now For nostalgic reasons, using engine-api to talk to the docker cli as we only need an old API version, and it is nice and easy to vendor... Signed-off-by: Justin Cormack <justin.cormack@docker.com>
98 lines
3.4 KiB
Go
98 lines
3.4 KiB
Go
package client
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import (
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"encoding/base64"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"net/url"
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"path/filepath"
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"strings"
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"golang.org/x/net/context"
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"github.com/docker/engine-api/types"
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)
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// ContainerStatPath returns Stat information about a path inside the container filesystem.
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func (cli *Client) ContainerStatPath(ctx context.Context, containerID, path string) (types.ContainerPathStat, error) {
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query := url.Values{}
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query.Set("path", filepath.ToSlash(path)) // Normalize the paths used in the API.
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urlStr := fmt.Sprintf("/containers/%s/archive", containerID)
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response, err := cli.head(ctx, urlStr, query, nil)
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if err != nil {
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return types.ContainerPathStat{}, err
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}
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defer ensureReaderClosed(response)
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return getContainerPathStatFromHeader(response.header)
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}
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// CopyToContainer copies content into the container filesystem.
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func (cli *Client) CopyToContainer(ctx context.Context, container, path string, content io.Reader, options types.CopyToContainerOptions) error {
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query := url.Values{}
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query.Set("path", filepath.ToSlash(path)) // Normalize the paths used in the API.
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// Do not allow for an existing directory to be overwritten by a non-directory and vice versa.
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if !options.AllowOverwriteDirWithFile {
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query.Set("noOverwriteDirNonDir", "true")
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}
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apiPath := fmt.Sprintf("/containers/%s/archive", container)
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response, err := cli.putRaw(ctx, apiPath, query, content, nil)
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if err != nil {
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return err
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}
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defer ensureReaderClosed(response)
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if response.statusCode != http.StatusOK {
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return fmt.Errorf("unexpected status code from daemon: %d", response.statusCode)
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}
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return nil
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}
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// CopyFromContainer gets the content from the container and returns it as a Reader
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// to manipulate it in the host. It's up to the caller to close the reader.
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func (cli *Client) CopyFromContainer(ctx context.Context, container, srcPath string) (io.ReadCloser, types.ContainerPathStat, error) {
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query := make(url.Values, 1)
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query.Set("path", filepath.ToSlash(srcPath)) // Normalize the paths used in the API.
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apiPath := fmt.Sprintf("/containers/%s/archive", container)
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response, err := cli.get(ctx, apiPath, query, nil)
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if err != nil {
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return nil, types.ContainerPathStat{}, err
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}
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if response.statusCode != http.StatusOK {
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return nil, types.ContainerPathStat{}, fmt.Errorf("unexpected status code from daemon: %d", response.statusCode)
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}
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// In order to get the copy behavior right, we need to know information
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// about both the source and the destination. The response headers include
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// stat info about the source that we can use in deciding exactly how to
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// copy it locally. Along with the stat info about the local destination,
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// we have everything we need to handle the multiple possibilities there
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// can be when copying a file/dir from one location to another file/dir.
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stat, err := getContainerPathStatFromHeader(response.header)
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if err != nil {
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return nil, stat, fmt.Errorf("unable to get resource stat from response: %s", err)
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}
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return response.body, stat, err
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}
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func getContainerPathStatFromHeader(header http.Header) (types.ContainerPathStat, error) {
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var stat types.ContainerPathStat
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encodedStat := header.Get("X-Docker-Container-Path-Stat")
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statDecoder := base64.NewDecoder(base64.StdEncoding, strings.NewReader(encodedStat))
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err := json.NewDecoder(statDecoder).Decode(&stat)
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if err != nil {
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err = fmt.Errorf("unable to decode container path stat header: %s", err)
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}
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return stat, err
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}
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