65 lines
1.7 KiB
Go
65 lines
1.7 KiB
Go
package client
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import (
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"fmt"
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"strings"
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"github.com/docker/docker/engine"
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"github.com/docker/docker/nat"
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flag "github.com/docker/docker/pkg/mflag"
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"github.com/docker/docker/utils"
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)
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// CmdPort lists port mappings for a container.
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// If a private port is specified, it also shows the public-facing port that is NATed to the private port.
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//
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// Usage: docker port CONTAINER [PRIVATE_PORT[/PROTO]]
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func (cli *DockerCli) CmdPort(args ...string) error {
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cmd := cli.Subcmd("port", "CONTAINER [PRIVATE_PORT[/PROTO]]", "List port mappings for the CONTAINER, or lookup the public-facing port that\nis NAT-ed to the PRIVATE_PORT", true)
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cmd.Require(flag.Min, 1)
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utils.ParseFlags(cmd, args, true)
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stream, _, err := cli.call("GET", "/containers/"+cmd.Arg(0)+"/json", nil, false)
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if err != nil {
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return err
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}
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env := engine.Env{}
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if err := env.Decode(stream); err != nil {
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return err
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}
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ports := nat.PortMap{}
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if err := env.GetSubEnv("NetworkSettings").GetJson("Ports", &ports); err != nil {
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return err
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}
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if cmd.NArg() == 2 {
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var (
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port = cmd.Arg(1)
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proto = "tcp"
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parts = strings.SplitN(port, "/", 2)
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)
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if len(parts) == 2 && len(parts[1]) != 0 {
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port = parts[0]
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proto = parts[1]
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}
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natPort := port + "/" + proto
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if frontends, exists := ports[nat.Port(port+"/"+proto)]; exists && frontends != nil {
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for _, frontend := range frontends {
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fmt.Fprintf(cli.out, "%s:%s\n", frontend.HostIp, frontend.HostPort)
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}
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return nil
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}
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return fmt.Errorf("Error: No public port '%s' published for %s", natPort, cmd.Arg(0))
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}
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for from, frontends := range ports {
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for _, frontend := range frontends {
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fmt.Fprintf(cli.out, "%s -> %s:%s\n", from, frontend.HostIp, frontend.HostPort)
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}
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}
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return nil
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}
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