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moby--moby/client/config_inspect.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

36 lines
944 B
Go

package client // import "github.com/docker/docker/client"
import (
"bytes"
"context"
"encoding/json"
"io/ioutil"
"github.com/docker/docker/api/types/swarm"
)
// ConfigInspectWithRaw returns the config information with raw data
func (cli *Client) ConfigInspectWithRaw(ctx context.Context, id string) (swarm.Config, []byte, error) {
if id == "" {
return swarm.Config{}, nil, objectNotFoundError{object: "config", id: id}
}
if err := cli.NewVersionError("1.30", "config inspect"); err != nil {
return swarm.Config{}, nil, err
}
resp, err := cli.get(ctx, "/configs/"+id, nil, nil)
defer ensureReaderClosed(resp)
if err != nil {
return swarm.Config{}, nil, wrapResponseError(err, resp, "config", id)
}
body, err := ioutil.ReadAll(resp.body)
if err != nil {
return swarm.Config{}, nil, err
}
var config swarm.Config
rdr := bytes.NewReader(body)
err = json.NewDecoder(rdr).Decode(&config)
return config, body, err
}