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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>
26 lines
598 B
Go
26 lines
598 B
Go
package client // import "github.com/docker/docker/client"
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import (
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"context"
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"encoding/json"
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"fmt"
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"github.com/docker/docker/api/types"
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)
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// DiskUsage requests the current data usage from the daemon
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func (cli *Client) DiskUsage(ctx context.Context) (types.DiskUsage, error) {
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var du types.DiskUsage
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serverResp, err := cli.get(ctx, "/system/df", nil, nil)
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defer ensureReaderClosed(serverResp)
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if err != nil {
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return du, err
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}
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if err := json.NewDecoder(serverResp.body).Decode(&du); err != nil {
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return du, fmt.Errorf("Error retrieving disk usage: %v", err)
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}
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return du, nil
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}
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