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moby--moby/client/image_list.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

45 lines
1.2 KiB
Go

package client // import "github.com/docker/docker/client"
import (
"context"
"encoding/json"
"net/url"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/api/types/versions"
)
// ImageList returns a list of images in the docker host.
func (cli *Client) ImageList(ctx context.Context, options types.ImageListOptions) ([]types.ImageSummary, error) {
var images []types.ImageSummary
query := url.Values{}
optionFilters := options.Filters
referenceFilters := optionFilters.Get("reference")
if versions.LessThan(cli.version, "1.25") && len(referenceFilters) > 0 {
query.Set("filter", referenceFilters[0])
for _, filterValue := range referenceFilters {
optionFilters.Del("reference", filterValue)
}
}
if optionFilters.Len() > 0 {
filterJSON, err := filters.ToParamWithVersion(cli.version, optionFilters)
if err != nil {
return images, err
}
query.Set("filters", filterJSON)
}
if options.All {
query.Set("all", "1")
}
serverResp, err := cli.get(ctx, "/images/json", query, nil)
defer ensureReaderClosed(serverResp)
if err != nil {
return images, err
}
err = json.NewDecoder(serverResp.body).Decode(&images)
return images, err
}