github.com/tsuna/docker@v1.7.0-rc3/api/client/login.go (about)

     1  package client
     2  
     3  import (
     4  	"bufio"
     5  	"encoding/json"
     6  	"fmt"
     7  	"io"
     8  	"os"
     9  	"strings"
    10  
    11  	"github.com/docker/docker/api/types"
    12  	"github.com/docker/docker/cliconfig"
    13  	flag "github.com/docker/docker/pkg/mflag"
    14  	"github.com/docker/docker/pkg/term"
    15  	"github.com/docker/docker/registry"
    16  )
    17  
    18  // CmdLogin logs in or registers a user to a Docker registry service.
    19  //
    20  // If no server is specified, the user will be logged into or registered to the registry's index server.
    21  //
    22  // Usage: docker login SERVER
    23  func (cli *DockerCli) CmdLogin(args ...string) error {
    24  	cmd := cli.Subcmd("login", "[SERVER]", "Register or log in to a Docker registry server, if no server is\nspecified \""+registry.IndexServerAddress()+"\" is the default.", true)
    25  	cmd.Require(flag.Max, 1)
    26  
    27  	var username, password, email string
    28  
    29  	cmd.StringVar(&username, []string{"u", "-username"}, "", "Username")
    30  	cmd.StringVar(&password, []string{"p", "-password"}, "", "Password")
    31  	cmd.StringVar(&email, []string{"e", "-email"}, "", "Email")
    32  
    33  	cmd.ParseFlags(args, true)
    34  
    35  	serverAddress := registry.IndexServerAddress()
    36  	if len(cmd.Args()) > 0 {
    37  		serverAddress = cmd.Arg(0)
    38  	}
    39  
    40  	promptDefault := func(prompt string, configDefault string) {
    41  		if configDefault == "" {
    42  			fmt.Fprintf(cli.out, "%s: ", prompt)
    43  		} else {
    44  			fmt.Fprintf(cli.out, "%s (%s): ", prompt, configDefault)
    45  		}
    46  	}
    47  
    48  	readInput := func(in io.Reader, out io.Writer) string {
    49  		reader := bufio.NewReader(in)
    50  		line, _, err := reader.ReadLine()
    51  		if err != nil {
    52  			fmt.Fprintln(out, err.Error())
    53  			os.Exit(1)
    54  		}
    55  		return string(line)
    56  	}
    57  
    58  	authconfig, ok := cli.configFile.AuthConfigs[serverAddress]
    59  	if !ok {
    60  		authconfig = cliconfig.AuthConfig{}
    61  	}
    62  
    63  	if username == "" {
    64  		promptDefault("Username", authconfig.Username)
    65  		username = readInput(cli.in, cli.out)
    66  		username = strings.Trim(username, " ")
    67  		if username == "" {
    68  			username = authconfig.Username
    69  		}
    70  	}
    71  	// Assume that a different username means they may not want to use
    72  	// the password or email from the config file, so prompt them
    73  	if username != authconfig.Username {
    74  		if password == "" {
    75  			oldState, err := term.SaveState(cli.inFd)
    76  			if err != nil {
    77  				return err
    78  			}
    79  			fmt.Fprintf(cli.out, "Password: ")
    80  			term.DisableEcho(cli.inFd, oldState)
    81  
    82  			password = readInput(cli.in, cli.out)
    83  			fmt.Fprint(cli.out, "\n")
    84  
    85  			term.RestoreTerminal(cli.inFd, oldState)
    86  			if password == "" {
    87  				return fmt.Errorf("Error : Password Required")
    88  			}
    89  		}
    90  
    91  		if email == "" {
    92  			promptDefault("Email", authconfig.Email)
    93  			email = readInput(cli.in, cli.out)
    94  			if email == "" {
    95  				email = authconfig.Email
    96  			}
    97  		}
    98  	} else {
    99  		// However, if they don't override the username use the
   100  		// password or email from the cmd line if specified. IOW, allow
   101  		// then to change/override them.  And if not specified, just
   102  		// use what's in the config file
   103  		if password == "" {
   104  			password = authconfig.Password
   105  		}
   106  		if email == "" {
   107  			email = authconfig.Email
   108  		}
   109  	}
   110  	authconfig.Username = username
   111  	authconfig.Password = password
   112  	authconfig.Email = email
   113  	authconfig.ServerAddress = serverAddress
   114  	cli.configFile.AuthConfigs[serverAddress] = authconfig
   115  
   116  	stream, statusCode, err := cli.call("POST", "/auth", cli.configFile.AuthConfigs[serverAddress], nil)
   117  	if statusCode == 401 {
   118  		delete(cli.configFile.AuthConfigs, serverAddress)
   119  		if err2 := cli.configFile.Save(); err2 != nil {
   120  			fmt.Fprintf(cli.out, "WARNING: could not save config file: %v\n", err2)
   121  		}
   122  		return err
   123  	}
   124  	if err != nil {
   125  		return err
   126  	}
   127  
   128  	var response types.AuthResponse
   129  	if err := json.NewDecoder(stream).Decode(&response); err != nil {
   130  		// Upon error, remove entry
   131  		delete(cli.configFile.AuthConfigs, serverAddress)
   132  		return err
   133  	}
   134  
   135  	if err := cli.configFile.Save(); err != nil {
   136  		return fmt.Errorf("Error saving config file: %v", err)
   137  	}
   138  	fmt.Fprintf(cli.out, "WARNING: login credentials saved in %s\n", cli.configFile.Filename())
   139  
   140  	if response.Status != "" {
   141  		fmt.Fprintf(cli.out, "%s\n", response.Status)
   142  	}
   143  	return nil
   144  }