35 lines
936 B
Go
35 lines
936 B
Go
package lib
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import (
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"io"
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"net/http"
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"net/url"
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"github.com/docker/docker/api/types"
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)
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// ImagePull request the docker host to pull an image from a remote registry.
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// It executes the privileged function if the operation is unauthorized
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// and it tries one more time.
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// It's up to the caller to handle the io.ReadCloser and close it properly.
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func (cli *Client) ImagePull(options types.ImagePullOptions, privilegeFunc RequestPrivilegeFunc) (io.ReadCloser, error) {
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query := url.Values{}
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query.Set("fromImage", options.ImageID)
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if options.Tag != "" {
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query.Set("tag", options.Tag)
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}
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resp, err := cli.tryImageCreate(query, options.RegistryAuth)
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if resp.statusCode == http.StatusUnauthorized {
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newAuthHeader, privilegeErr := privilegeFunc()
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if privilegeErr != nil {
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return nil, privilegeErr
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}
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resp, err = cli.tryImageCreate(query, newAuthHeader)
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}
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if err != nil {
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return nil, err
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}
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return resp.body, nil
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}
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