81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
package client
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import (
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"encoding/base64"
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"encoding/json"
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"fmt"
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"net/url"
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"strings"
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"github.com/docker/docker/graph"
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flag "github.com/docker/docker/pkg/mflag"
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"github.com/docker/docker/pkg/parsers"
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"github.com/docker/docker/registry"
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"github.com/docker/docker/utils"
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)
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// CmdPull pulls an image or a repository from the registry.
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//
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// Usage: docker pull [OPTIONS] IMAGENAME[:TAG|@DIGEST]
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func (cli *DockerCli) CmdPull(args ...string) error {
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cmd := cli.Subcmd("pull", "NAME[:TAG|@DIGEST]", "Pull an image or a repository from the registry", true)
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allTags := cmd.Bool([]string{"a", "-all-tags"}, false, "Download all tagged images in the repository")
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cmd.Require(flag.Exact, 1)
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utils.ParseFlags(cmd, args, true)
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var (
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v = url.Values{}
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remote = cmd.Arg(0)
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newRemote = remote
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)
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taglessRemote, tag := parsers.ParseRepositoryTag(remote)
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if tag == "" && !*allTags {
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newRemote = utils.ImageReference(taglessRemote, graph.DEFAULTTAG)
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}
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if tag != "" && *allTags {
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return fmt.Errorf("tag can't be used with --all-tags/-a")
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}
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v.Set("fromImage", newRemote)
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// Resolve the Repository name from fqn to RepositoryInfo
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repoInfo, err := registry.ParseRepositoryInfo(taglessRemote)
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if err != nil {
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return err
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}
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cli.LoadConfigFile()
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// Resolve the Auth config relevant for this server
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authConfig := cli.configFile.ResolveAuthConfig(repoInfo.Index)
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pull := func(authConfig registry.AuthConfig) error {
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buf, err := json.Marshal(authConfig)
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if err != nil {
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return err
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}
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registryAuthHeader := []string{
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base64.URLEncoding.EncodeToString(buf),
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}
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return cli.stream("POST", "/images/create?"+v.Encode(), nil, cli.out, map[string][]string{
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"X-Registry-Auth": registryAuthHeader,
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})
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}
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if err := pull(authConfig); err != nil {
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if strings.Contains(err.Error(), "Status 401") {
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fmt.Fprintln(cli.out, "\nPlease login prior to pull:")
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if err := cli.CmdLogin(repoInfo.Index.GetAuthConfigKey()); err != nil {
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return err
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}
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authConfig := cli.configFile.ResolveAuthConfig(repoInfo.Index)
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return pull(authConfig)
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}
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return err
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}
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return nil
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}
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