github.com/guilhermebr/docker@v1.4.2-0.20150428121140-67da055cebca/api/client/events.go (about)

     1  package client
     2  
     3  import (
     4  	"net/url"
     5  	"strconv"
     6  	"time"
     7  
     8  	"github.com/docker/docker/opts"
     9  	flag "github.com/docker/docker/pkg/mflag"
    10  	"github.com/docker/docker/pkg/parsers/filters"
    11  	"github.com/docker/docker/pkg/timeutils"
    12  )
    13  
    14  // CmdEvents prints a live stream of real time events from the server.
    15  //
    16  // Usage: docker events [OPTIONS]
    17  func (cli *DockerCli) CmdEvents(args ...string) error {
    18  	cmd := cli.Subcmd("events", "", "Get real time events from the server", true)
    19  	since := cmd.String([]string{"#since", "-since"}, "", "Show all events created since timestamp")
    20  	until := cmd.String([]string{"-until"}, "", "Stream events until this timestamp")
    21  	flFilter := opts.NewListOpts(nil)
    22  	cmd.Var(&flFilter, []string{"f", "-filter"}, "Filter output based on conditions provided")
    23  	cmd.Require(flag.Exact, 0)
    24  
    25  	cmd.ParseFlags(args, true)
    26  
    27  	var (
    28  		v               = url.Values{}
    29  		loc             = time.FixedZone(time.Now().Zone())
    30  		eventFilterArgs = filters.Args{}
    31  	)
    32  
    33  	// Consolidate all filter flags, and sanity check them early.
    34  	// They'll get process in the daemon/server.
    35  	for _, f := range flFilter.GetAll() {
    36  		var err error
    37  		eventFilterArgs, err = filters.ParseFlag(f, eventFilterArgs)
    38  		if err != nil {
    39  			return err
    40  		}
    41  	}
    42  	var setTime = func(key, value string) {
    43  		format := timeutils.RFC3339NanoFixed
    44  		if len(value) < len(format) {
    45  			format = format[:len(value)]
    46  		}
    47  		if t, err := time.ParseInLocation(format, value, loc); err == nil {
    48  			v.Set(key, strconv.FormatInt(t.Unix(), 10))
    49  		} else {
    50  			v.Set(key, value)
    51  		}
    52  	}
    53  	if *since != "" {
    54  		setTime("since", *since)
    55  	}
    56  	if *until != "" {
    57  		setTime("until", *until)
    58  	}
    59  	if len(eventFilterArgs) > 0 {
    60  		filterJSON, err := filters.ToParam(eventFilterArgs)
    61  		if err != nil {
    62  			return err
    63  		}
    64  		v.Set("filters", filterJSON)
    65  	}
    66  	if err := cli.stream("GET", "/events?"+v.Encode(), nil, cli.out, nil); err != nil {
    67  		return err
    68  	}
    69  	return nil
    70  }