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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>
53 lines
1.7 KiB
Go
53 lines
1.7 KiB
Go
package client // import "github.com/docker/docker/client"
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import (
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"bytes"
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"context"
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"encoding/json"
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"io/ioutil"
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"net/url"
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"github.com/docker/docker/api/types"
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)
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// ContainerInspect returns the container information.
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func (cli *Client) ContainerInspect(ctx context.Context, containerID string) (types.ContainerJSON, error) {
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if containerID == "" {
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return types.ContainerJSON{}, objectNotFoundError{object: "container", id: containerID}
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}
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serverResp, err := cli.get(ctx, "/containers/"+containerID+"/json", nil, nil)
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defer ensureReaderClosed(serverResp)
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if err != nil {
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return types.ContainerJSON{}, wrapResponseError(err, serverResp, "container", containerID)
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}
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var response types.ContainerJSON
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err = json.NewDecoder(serverResp.body).Decode(&response)
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return response, err
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}
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// ContainerInspectWithRaw returns the container information and its raw representation.
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func (cli *Client) ContainerInspectWithRaw(ctx context.Context, containerID string, getSize bool) (types.ContainerJSON, []byte, error) {
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if containerID == "" {
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return types.ContainerJSON{}, nil, objectNotFoundError{object: "container", id: containerID}
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}
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query := url.Values{}
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if getSize {
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query.Set("size", "1")
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}
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serverResp, err := cli.get(ctx, "/containers/"+containerID+"/json", query, nil)
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defer ensureReaderClosed(serverResp)
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if err != nil {
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return types.ContainerJSON{}, nil, wrapResponseError(err, serverResp, "container", containerID)
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}
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body, err := ioutil.ReadAll(serverResp.body)
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if err != nil {
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return types.ContainerJSON{}, nil, err
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}
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var response types.ContainerJSON
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rdr := bytes.NewReader(body)
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err = json.NewDecoder(rdr).Decode(&response)
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return response, body, err
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}
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