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moby--moby/client/container_commit.go
Sebastiaan van Stijn 9c846b2fcc
Client: always call ensureReaderClosed
Unlike a plain `net/http/client.Do()`, requests made through client/request
use the `sendRequest` function, which parses the server response, and may
convert non-transport errors into errors (through `cli.checkResponseErr()`).

This means that we cannot assume that no reader was opened if an error is
returned.

This patch changes various locations where `ensureReaderClosed` was only
called in the non-error situation, and uses a `defer` to make sure it's
always called.

`ensureReaderClosed` itself already checks if the response's body was set,
so in situations where the error was due to a transport error, calling
`ensureReaderClosed` should be a no-op.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
2019-03-18 15:26:21 +01:00

55 lines
1.5 KiB
Go

package client // import "github.com/docker/docker/client"
import (
"context"
"encoding/json"
"errors"
"net/url"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
)
// ContainerCommit applies changes into a container and creates a new tagged image.
func (cli *Client) ContainerCommit(ctx context.Context, container string, options types.ContainerCommitOptions) (types.IDResponse, error) {
var repository, tag string
if options.Reference != "" {
ref, err := reference.ParseNormalizedNamed(options.Reference)
if err != nil {
return types.IDResponse{}, err
}
if _, isCanonical := ref.(reference.Canonical); isCanonical {
return types.IDResponse{}, errors.New("refusing to create a tag with a digest reference")
}
ref = reference.TagNameOnly(ref)
if tagged, ok := ref.(reference.Tagged); ok {
tag = tagged.Tag()
}
repository = reference.FamiliarName(ref)
}
query := url.Values{}
query.Set("container", container)
query.Set("repo", repository)
query.Set("tag", tag)
query.Set("comment", options.Comment)
query.Set("author", options.Author)
for _, change := range options.Changes {
query.Add("changes", change)
}
if !options.Pause {
query.Set("pause", "0")
}
var response types.IDResponse
resp, err := cli.post(ctx, "/commit", query, options.Config, nil)
defer ensureReaderClosed(resp)
if err != nil {
return response, err
}
err = json.NewDecoder(resp.body).Decode(&response)
return response, err
}