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- package client
- import (
- "errors"
- "fmt"
- Cli "github.com/docker/docker/cli"
- "github.com/docker/docker/pkg/jsonmessage"
- flag "github.com/docker/docker/pkg/mflag"
- "github.com/docker/docker/reference"
- "github.com/docker/docker/registry"
- "github.com/docker/engine-api/client"
- "github.com/docker/engine-api/types"
- )
- // CmdPull pulls an image or a repository from the registry.
- //
- // Usage: docker pull [OPTIONS] IMAGENAME[:TAG|@DIGEST]
- func (cli *DockerCli) CmdPull(args ...string) error {
- cmd := Cli.Subcmd("pull", []string{"NAME[:TAG|@DIGEST]"}, Cli.DockerCommands["pull"].Description, true)
- allTags := cmd.Bool([]string{"a", "-all-tags"}, false, "Download all tagged images in the repository")
- addTrustedFlags(cmd, true)
- cmd.Require(flag.Exact, 1)
- cmd.ParseFlags(args, true)
- remote := cmd.Arg(0)
- distributionRef, err := reference.ParseNamed(remote)
- if err != nil {
- return err
- }
- if *allTags && !reference.IsNameOnly(distributionRef) {
- return errors.New("tag can't be used with --all-tags/-a")
- }
- if !*allTags && reference.IsNameOnly(distributionRef) {
- distributionRef = reference.WithDefaultTag(distributionRef)
- fmt.Fprintf(cli.out, "Using default tag: %s\n", reference.DefaultTag)
- }
- var tag string
- switch x := distributionRef.(type) {
- case reference.Canonical:
- tag = x.Digest().String()
- case reference.NamedTagged:
- tag = x.Tag()
- }
- ref := registry.ParseReference(tag)
- // Resolve the Repository name from fqn to RepositoryInfo
- repoInfo, err := registry.ParseRepositoryInfo(distributionRef)
- if err != nil {
- return err
- }
- authConfig := cli.resolveAuthConfig(cli.configFile.AuthConfigs, repoInfo.Index)
- requestPrivilege := cli.registryAuthenticationPrivilegedFunc(repoInfo.Index, "pull")
- if isTrusted() && !ref.HasDigest() {
- // Check if tag is digest
- return cli.trustedPull(repoInfo, ref, authConfig, requestPrivilege)
- }
- return cli.imagePullPrivileged(authConfig, distributionRef.String(), "", requestPrivilege)
- }
- func (cli *DockerCli) imagePullPrivileged(authConfig types.AuthConfig, imageID, tag string, requestPrivilege client.RequestPrivilegeFunc) error {
- encodedAuth, err := encodeAuthToBase64(authConfig)
- if err != nil {
- return err
- }
- options := types.ImagePullOptions{
- ImageID: imageID,
- Tag: tag,
- RegistryAuth: encodedAuth,
- }
- responseBody, err := cli.client.ImagePull(options, requestPrivilege)
- if err != nil {
- return err
- }
- defer responseBody.Close()
- return jsonmessage.DisplayJSONMessagesStream(responseBody, cli.out, cli.outFd, cli.isTerminalOut, nil)
- }
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