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