github.com/chenchun/docker@v1.3.2-0.20150629222414-20467faf132b/api/client/logs.go (about)

     1  package client
     2  
     3  import (
     4  	"encoding/json"
     5  	"fmt"
     6  	"net/url"
     7  	"time"
     8  
     9  	"github.com/docker/docker/api/types"
    10  	flag "github.com/docker/docker/pkg/mflag"
    11  	"github.com/docker/docker/pkg/timeutils"
    12  )
    13  
    14  // CmdLogs fetches the logs of a given container.
    15  //
    16  // docker logs [OPTIONS] CONTAINER
    17  func (cli *DockerCli) CmdLogs(args ...string) error {
    18  	var (
    19  		cmd    = cli.Subcmd("logs", []string{"CONTAINER"}, "Fetch the logs of a container", true)
    20  		follow = cmd.Bool([]string{"f", "-follow"}, false, "Follow log output")
    21  		since  = cmd.String([]string{"-since"}, "", "Show logs since timestamp")
    22  		times  = cmd.Bool([]string{"t", "-timestamps"}, false, "Show timestamps")
    23  		tail   = cmd.String([]string{"-tail"}, "all", "Number of lines to show from the end of the logs")
    24  	)
    25  	cmd.Require(flag.Exact, 1)
    26  
    27  	cmd.ParseFlags(args, true)
    28  
    29  	name := cmd.Arg(0)
    30  
    31  	stream, _, _, err := cli.call("GET", "/containers/"+name+"/json", nil, nil)
    32  	if err != nil {
    33  		return err
    34  	}
    35  
    36  	var c types.ContainerJSON
    37  	if err := json.NewDecoder(stream).Decode(&c); err != nil {
    38  		return err
    39  	}
    40  
    41  	if logType := c.HostConfig.LogConfig.Type; logType != "json-file" {
    42  		return fmt.Errorf("\"logs\" command is supported only for \"json-file\" logging driver (got: %s)", logType)
    43  	}
    44  
    45  	v := url.Values{}
    46  	v.Set("stdout", "1")
    47  	v.Set("stderr", "1")
    48  
    49  	if *since != "" {
    50  		v.Set("since", timeutils.GetTimestamp(*since, time.Now()))
    51  	}
    52  
    53  	if *times {
    54  		v.Set("timestamps", "1")
    55  	}
    56  
    57  	if *follow {
    58  		v.Set("follow", "1")
    59  	}
    60  	v.Set("tail", *tail)
    61  
    62  	sopts := &streamOpts{
    63  		rawTerminal: c.Config.Tty,
    64  		out:         cli.out,
    65  		err:         cli.err,
    66  	}
    67  
    68  	_, err = cli.stream("GET", "/containers/"+name+"/logs?"+v.Encode(), sopts)
    69  	return err
    70  }