Merge pull request #138 from remicorniere/Basic_Terminal_Client

Basic terminal client

_examples/xmpp_chat_client/config.yml

@@ -0,0 +1,15 @@
+# Default config for the client
+Server :
+  - full_address: "localhost:5222"
+  - port: 5222
+Client :
+  - name: "testuser2"
+  - jid: "testuser2@localhost"
+  - pass: "pass123" #Password in a config file yay
+
+Contacts : "testuser1@localhost;testuser3@localhost"
+
+LogStanzas:
+  - logger_on: "true"
+  - logfile_path: "./logs"
+

_examples/xmpp_chat_client/go.mod

@@ -0,0 +1,10 @@
+module go-xmpp/_examples/xmpp_chat_client
+
+go 1.13
+
+require (
+	github.com/awesome-gocui/gocui v0.6.1-0.20191115151952-a34ffb055986
+	github.com/spf13/pflag v1.0.5
+	github.com/spf13/viper v1.6.1
+	gosrc.io/xmpp v0.3.1-0.20191212145100-27130d72926b
+)

_examples/xmpp_chat_client/interface.go

@@ -0,0 +1,328 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"github.com/awesome-gocui/gocui"
+	"log"
+	"strings"
+)
+
+const (
+	// Windows
+	chatLogWindow      = "clw" // Where (received and sent) messages are logged
+	chatInputWindow    = "iw"  // Where messages are written
+	rawInputWindow     = "rw"  // Where raw stanzas are written
+	contactsListWindow = "cl"  // Where the contacts list is shown, and contacts are selectable
+	menuWindow         = "mw"  // Where the menu is shown
+
+	// Menu options
+	disconnect         = "Disconnect"
+	askServerForRoster = "Ask server for roster"
+	rawMode            = "Switch to Send Raw Mode"
+	messageMode        = "Switch to Send Message Mode"
+	contactList        = "Contacts list"
+	backFromContacts   = "<- Go back"
+)
+
+// To store names of views on top
+type viewsState struct {
+	input          string   // Which input view is on top
+	side           string   // Which side view is on top
+	contacts       []string // Contacts list
+	currentContact string   // Contact we are currently messaging
+}
+
+var (
+	// Which window is on top currently on top of the other.
+	// This is the init setup
+	viewState = viewsState{
+		input: chatInputWindow,
+		side:  menuWindow,
+	}
+	menuOptions = []string{contactList, rawMode, askServerForRoster, disconnect}
+	// Errors
+	servConnFail = errors.New("failed to connect to server. Check your configuration ? Exiting")
+)
+
+func setCurrentViewOnTop(g *gocui.Gui, name string) (*gocui.View, error) {
+	if _, err := g.SetCurrentView(name); err != nil {
+		return nil, err
+	}
+	return g.SetViewOnTop(name)
+}
+
+func layout(g *gocui.Gui) error {
+	maxX, maxY := g.Size()
+
+	if v, err := g.SetView(chatLogWindow, maxX/5, 0, maxX-1, 5*maxY/6-1, 0); err != nil {
+		if !gocui.IsUnknownView(err) {
+			return err
+		}
+		v.Title = "Chat log"
+		v.Wrap = true
+		v.Autoscroll = true
+	}
+
+	if v, err := g.SetView(contactsListWindow, 0, 0, maxX/5-1, 5*maxY/6-2, 0); err != nil {
+		if !gocui.IsUnknownView(err) {
+			return err
+		}
+		v.Title = "Contacts"
+		v.Wrap = true
+		v.Autoscroll = true
+	}
+
+	if v, err := g.SetView(menuWindow, 0, 0, maxX/5-1, 5*maxY/6-2, 0); err != nil {
+		if !gocui.IsUnknownView(err) {
+			return err
+		}
+		v.Title = "Menu"
+		v.Wrap = true
+		v.Autoscroll = true
+		fmt.Fprint(v, strings.Join(menuOptions, "\n"))
+		if _, err = setCurrentViewOnTop(g, menuWindow); err != nil {
+			return err
+		}
+	}
+
+	if v, err := g.SetView(rawInputWindow, 0, 5*maxY/6-1, maxX/1-1, maxY-1, 0); err != nil {
+		if !gocui.IsUnknownView(err) {
+			return err
+		}
+		v.Title = "Write or paste a raw stanza. Press \"Ctrl+E\" to send :"
+		v.Editable = true
+		v.Wrap = true
+	}
+
+	if v, err := g.SetView(chatInputWindow, 0, 5*maxY/6-1, maxX/1-1, maxY-1, 0); err != nil {
+		if !gocui.IsUnknownView(err) {
+			return err
+		}
+		v.Title = "Write a message :"
+		v.Editable = true
+		v.Wrap = true
+
+		if _, err = setCurrentViewOnTop(g, chatInputWindow); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func quit(g *gocui.Gui, v *gocui.View) error {
+	return gocui.ErrQuit
+}
+
+// Sends an input text from the user to the backend while also printing it in the chatlog window.
+// KeyEnter is viewed as "\n" by gocui, so messages should only be one line, whereas raw sending has a different key
+// binding and therefor should work with this too (for multiple lines stanzas)
+func writeInput(g *gocui.Gui, v *gocui.View) error {
+	chatLogWindow, _ := g.View(chatLogWindow)
+
+	input := strings.Join(v.ViewBufferLines(), "\n")
+
+	fmt.Fprintln(chatLogWindow, "Me : ", input)
+	textChan <- input
+
+	v.Clear()
+	v.EditDeleteToStartOfLine()
+	return nil
+}
+
+func setKeyBindings(g *gocui.Gui) {
+	// ==========================
+	// All views
+	if err := g.SetKeybinding("", gocui.KeyCtrlC, gocui.ModNone, quit); err != nil {
+		log.Panicln(err)
+	}
+
+	// ==========================
+	// Chat input
+	if err := g.SetKeybinding(chatInputWindow, gocui.KeyEnter, gocui.ModNone, writeInput); err != nil {
+		log.Panicln(err)
+	}
+
+	if err := g.SetKeybinding(chatInputWindow, gocui.KeyCtrlSpace, gocui.ModNone, nextView); err != nil {
+		log.Panicln(err)
+	}
+
+	// ==========================
+	// Raw input
+	if err := g.SetKeybinding(rawInputWindow, gocui.KeyCtrlE, gocui.ModNone, writeInput); err != nil {
+		log.Panicln(err)
+	}
+
+	if err := g.SetKeybinding(rawInputWindow, gocui.KeyCtrlSpace, gocui.ModNone, nextView); err != nil {
+		log.Panicln(err)
+	}
+
+	// ==========================
+	// Menu
+	if err := g.SetKeybinding(menuWindow, gocui.KeyArrowDown, gocui.ModNone, cursorDown); err != nil {
+		log.Panicln(err)
+	}
+	if err := g.SetKeybinding(menuWindow, gocui.KeyArrowUp, gocui.ModNone, cursorUp); err != nil {
+		log.Panicln(err)
+	}
+	if err := g.SetKeybinding(menuWindow, gocui.KeyCtrlSpace, gocui.ModNone, nextView); err != nil {
+		log.Panicln(err)
+	}
+	if err := g.SetKeybinding(menuWindow, gocui.KeyEnter, gocui.ModNone, getLine); err != nil {
+		log.Panicln(err)
+	}
+
+	// ==========================
+	// Contacts list
+	if err := g.SetKeybinding(contactsListWindow, gocui.KeyArrowDown, gocui.ModNone, cursorDown); err != nil {
+		log.Panicln(err)
+	}
+	if err := g.SetKeybinding(contactsListWindow, gocui.KeyArrowUp, gocui.ModNone, cursorUp); err != nil {
+		log.Panicln(err)
+	}
+	if err := g.SetKeybinding(contactsListWindow, gocui.KeyEnter, gocui.ModNone, getLine); err != nil {
+		log.Panicln(err)
+	}
+	if err := g.SetKeybinding(contactsListWindow, gocui.KeyCtrlSpace, gocui.ModNone, nextView); err != nil {
+		log.Panicln(err)
+	}
+
+}
+
+// General
+// Used to handle menu selections and navigations
+func getLine(g *gocui.Gui, v *gocui.View) error {
+	var l string
+	var err error
+
+	_, cy := v.Cursor()
+	if l, err = v.Line(cy); err != nil {
+		l = ""
+	}
+	if viewState.side == menuWindow {
+		if l == contactList {
+			cv, _ := g.View(contactsListWindow)
+			viewState.side = contactsListWindow
+			g.SetViewOnTop(contactsListWindow)
+			g.SetCurrentView(contactsListWindow)
+			if len(cv.ViewBufferLines()) == 0 {
+				printContactsToWindow(g, viewState.contacts)
+			}
+		} else if l == disconnect || l == askServerForRoster {
+			chlw, _ := g.View(chatLogWindow)
+			fmt.Fprintln(chlw, infoFormat+" Not yet implemented !")
+		} else if l == rawMode {
+			mw, _ := g.View(menuWindow)
+			viewState.input = rawInputWindow
+			g.SetViewOnTop(rawInputWindow)
+			g.SetCurrentView(rawInputWindow)
+			menuOptions[1] = messageMode
+			v.Clear()
+			v.EditDeleteToStartOfLine()
+			fmt.Fprintln(mw, strings.Join(menuOptions, "\n"))
+			message := "Now sending in raw stanza mode"
+			clv, _ := g.View(chatLogWindow)
+			fmt.Fprintln(clv, infoFormat+message)
+		} else if l == messageMode {
+			mw, _ := g.View(menuWindow)
+			viewState.input = chatInputWindow
+			g.SetViewOnTop(chatInputWindow)
+			g.SetCurrentView(chatInputWindow)
+			menuOptions[1] = rawMode
+			v.Clear()
+			v.EditDeleteToStartOfLine()
+			fmt.Fprintln(mw, strings.Join(menuOptions, "\n"))
+			message := "Now sending in messages mode"
+			clv, _ := g.View(chatLogWindow)
+			fmt.Fprintln(clv, infoFormat+message)
+		}
+	} else if viewState.side == contactsListWindow {
+		if l == backFromContacts {
+			viewState.side = menuWindow
+			g.SetViewOnTop(menuWindow)
+			g.SetCurrentView(menuWindow)
+		} else if l == "" {
+			return nil
+		} else {
+			// Updating the current correspondent, back-end side.
+			CorrespChan <- l
+			viewState.currentContact = l
+			// Showing the selected contact in contacts list
+			cl, _ := g.View(contactsListWindow)
+			cts := cl.ViewBufferLines()
+			cl.Clear()
+			printContactsToWindow(g, cts)
+			// Showing a message to the user, and switching back to input after the new contact is selected.
+			message := "Now sending messages to : " + l + " in a private conversation"
+			clv, _ := g.View(chatLogWindow)
+			fmt.Fprintln(clv, infoFormat+message)
+			g.SetCurrentView(chatInputWindow)
+		}
+	}
+
+	return nil
+}
+
+func printContactsToWindow(g *gocui.Gui, contactsList []string) {
+	cl, _ := g.View(contactsListWindow)
+	for _, c := range contactsList {
+		c = strings.ReplaceAll(c, " *", "")
+		if c == viewState.currentContact {
+			fmt.Fprintf(cl, c+" *\n")
+		} else {
+			fmt.Fprintf(cl, c+"\n")
+		}
+	}
+}
+
+// Changing view between input and "menu/contacts" when pressing the specific key.
+func nextView(g *gocui.Gui, v *gocui.View) error {
+	if v == nil || v.Name() == chatInputWindow || v.Name() == rawInputWindow {
+		_, err := g.SetCurrentView(viewState.side)
+		return err
+	} else if v.Name() == menuWindow || v.Name() == contactsListWindow {
+		_, err := g.SetCurrentView(viewState.input)
+		return err
+	}
+
+	// Should not be reached right now
+	_, err := g.SetCurrentView(chatInputWindow)
+	return err
+}
+
+func cursorDown(g *gocui.Gui, v *gocui.View) error {
+	if v != nil {
+		cx, cy := v.Cursor()
+		// Avoid going below the list of contacts. Although lines are stored in the view as a slice
+		// in the used lib. Therefor, if the number of lines is too big, the cursor will go past the last line since
+		// increasing slice capacity is done by doubling it. Last lines will be "nil" and reachable by the cursor
+		// in a dynamic context (such as contacts list)
+		cv := g.CurrentView()
+		h := cv.LinesHeight()
+		if cy+1 >= h {
+			return nil
+		}
+		// Lower cursor
+		if err := v.SetCursor(cx, cy+1); err != nil {
+			ox, oy := v.Origin()
+			if err := v.SetOrigin(ox, oy+1); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func cursorUp(g *gocui.Gui, v *gocui.View) error {
+	if v != nil {
+		ox, oy := v.Origin()
+		cx, cy := v.Cursor()
+		if err := v.SetCursor(cx, cy-1); err != nil && oy > 0 {
+			if err := v.SetOrigin(ox, oy-1); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}

_examples/xmpp_chat_client/xmpp_chat_client.go

@@ -2,94 +2,289 @@ package main
 
 /*
 xmpp_chat_client is a demo client that connect on an XMPP server to chat with other members
-Note that this example sends to a very specific user. User logic is not implemented here.
 */
 
 import (
-	. "bufio"
+	"encoding/xml"
+	"flag"
 	"fmt"
-	"os"
-
+	"github.com/awesome-gocui/gocui"
+	"github.com/spf13/pflag"
+	"github.com/spf13/viper"
 	"gosrc.io/xmpp"
 	"gosrc.io/xmpp/stanza"
+	"log"
+	"os"
+	"path"
+	"strconv"
+	"strings"
 )
 
 const (
-	currentUserAddress = "localhost:5222"
-	currentUserJid     = "testuser@localhost"
-	currentUserPass    = "testpass"
-	correspondantJid   = "testuser2@localhost"
+	infoFormat = "====== "
+	// Default configuration
+	defaultConfigFilePath = "./"
+
+	configFileName = "config"
+	configType     = "yaml"
+	logStanzasOn   = "logger_on"
+	logFilePath    = "logfile_path"
+	// Keys in config
+	serverAddressKey = "full_address"
+	clientJid        = "jid"
+	clientPass       = "pass"
+	configContactSep = ";"
 )
 
+var (
+	CorrespChan = make(chan string, 1)
+	textChan    = make(chan string, 5)
+	rawTextChan = make(chan string, 5)
+	killChan    = make(chan struct{}, 1)
+	errChan     = make(chan error)
+
+	logger *log.Logger
+)
+
+type config struct {
+	Server     map[string]string `mapstructure:"server"`
+	Client     map[string]string `mapstructure:"client"`
+	Contacts   string            `string:"contact"`
+	LogStanzas map[string]string `mapstructure:"logstanzas"`
+}
+
 func main() {
-	config := xmpp.Config{
+
+	// ============================================================
+	// Parse the flag with the config directory path as argument
+	flag.String("c", defaultConfigFilePath, "Provide a path to the directory that contains the configuration"+
+		" file you want to use. Config file should be named \"config\" and be of YAML format..")
+	pflag.CommandLine.AddGoFlagSet(flag.CommandLine)
+	pflag.Parse()
+
+	// ==========================
+	// Read configuration
+	c := readConfig()
+
+	//================================
+	// Setup logger
+	on, err := strconv.ParseBool(c.LogStanzas[logStanzasOn])
+	if err != nil {
+		log.Panicln(err)
+	}
+	if on {
+		f, err := os.OpenFile(path.Join(c.LogStanzas[logFilePath], "logs.txt"), os.O_RDWR|os.O_APPEND|os.O_CREATE, 0666)
+		if err != nil {
+			log.Panicln(err)
+		}
+		logger = log.New(f, "", log.Lshortfile|log.Ldate|log.Ltime)
+		logger.SetOutput(f)
+		defer f.Close()
+	}
+
+	// ==========================
+	// Create TUI
+	g, err := gocui.NewGui(gocui.OutputNormal, true)
+	if err != nil {
+		log.Panicln(err)
+	}
+	defer g.Close()
+	g.Highlight = true
+	g.Cursor = true
+	g.SelFgColor = gocui.ColorGreen
+	g.SetManagerFunc(layout)
+	setKeyBindings(g)
+
+	// ==========================
+	// Run TUI
+	go func() {
+		errChan <- g.MainLoop()
+	}()
+
+	// ==========================
+	// Start XMPP client
+	go startClient(g, c)
+
+	select {
+	case err := <-errChan:
+		if err == gocui.ErrQuit {
+			log.Println("Closing client.")
+		} else {
+			log.Panicln(err)
+		}
+	}
+}
+
+func startClient(g *gocui.Gui, config *config) {
+
+	// ==========================
+	// Client setup
+	clientCfg := xmpp.Config{
 		TransportConfiguration: xmpp.TransportConfiguration{
-			Address: currentUserAddress,
+			Address: config.Server[serverAddressKey],
 		},
-		Jid:        currentUserJid,
-		Credential: xmpp.Password(currentUserPass),
+		Jid:        config.Client[clientJid],
+		Credential: xmpp.Password(config.Client[clientPass]),
 		Insecure:   true}
 
 	var client *xmpp.Client
 	var err error
 	router := xmpp.NewRouter()
-	router.HandleFunc("message", handleMessage)
-	if client, err = xmpp.NewClient(config, router, errorHandler); err != nil {
-		fmt.Println("Error new client")
+
+	handlerWithGui := func(_ xmpp.Sender, p stanza.Packet) {
+		msg, ok := p.(stanza.Message)
+		if logger != nil {
+			logger.Println(msg)
+		}
+
+		v, err := g.View(chatLogWindow)
+		if !ok {
+			fmt.Fprintf(v, "%sIgnoring packet: %T\n", infoFormat, p)
+			return
+		}
+		if err != nil {
+			return
+		}
+		g.Update(func(g *gocui.Gui) error {
+			if msg.Error.Code != 0 {
+				_, err := fmt.Fprintf(v, "Error from server : %s : %s \n", msg.Error.Reason, msg.XMLName.Space)
+				return err
+			}
+			if len(strings.TrimSpace(msg.Body)) != 0 {
+				_, err := fmt.Fprintf(v, "%s : %s \n", msg.From, msg.Body)
+				return err
+			}
+			return nil
+		})
 	}
 
-	// Connecting client and handling messages
-	// To use a stream manager, just write something like this instead :
-	//cm := xmpp.NewStreamManager(client, startMessaging)
-	//log.Fatal(cm.Run()) //=> this will lock the calling goroutine
+	router.HandleFunc("message", handlerWithGui)
+	if client, err = xmpp.NewClient(clientCfg, router, errorHandler); err != nil {
+		panic(fmt.Sprintf("Could not create a new client ! %s", err))
+
+	}
 
+	// ==========================
+	// Client connection
 	if err = client.Connect(); err != nil {
-		fmt.Printf("XMPP connection failed: %s", err)
+		msg := fmt.Sprintf("%sXMPP connection failed: %s", infoFormat, err)
+		g.Update(func(g *gocui.Gui) error {
+			v, err := g.View(chatLogWindow)
+			fmt.Fprintf(v, msg)
+			return err
+		})
+		fmt.Println("Failed to connect to server. Exiting...")
+		errChan <- servConnFail
 		return
 	}
-	startMessaging(client)
 
+	// ==========================
+	// Start working
+	//askForRoster(client, g)
+	updateRosterFromConfig(g, config)
+	// Sending the default contact in a channel. Default value is the first contact in the list from the config.
+	viewState.currentContact = strings.Split(config.Contacts, configContactSep)[0]
+	// Informing user of the default contact
+	clw, _ := g.View(chatLogWindow)
+	fmt.Fprintf(clw, infoFormat+"Now sending messages to "+viewState.currentContact+" in a private conversation\n")
+	CorrespChan <- viewState.currentContact
+	startMessaging(client, config)
 }
 
-func startMessaging(client xmpp.Sender) {
-	reader := NewReader(os.Stdin)
-	textChan := make(chan string)
+func startMessaging(client xmpp.Sender, config *config) {
 	var text string
+	var correspondent string
 	for {
-		fmt.Print("Enter text: ")
-		go readInput(reader, textChan)
 		select {
 		case <-killChan:
 			return
 		case text = <-textChan:
-			reply := stanza.Message{Attrs: stanza.Attrs{To: correspondantJid}, Body: text}
+			reply := stanza.Message{Attrs: stanza.Attrs{To: correspondent, From: config.Client[clientJid], Type: stanza.MessageTypeChat}, Body: text}
+			if logger != nil {
+				raw, _ := xml.Marshal(reply)
+				logger.Println(string(raw))
+			}
 			err := client.Send(reply)
 			if err != nil {
 				fmt.Printf("There was a problem sending the message : %v", reply)
 				return
 			}
+		case text = <-rawTextChan:
+			if logger != nil {
+				logger.Println(text)
+			}
+			err := client.SendRaw(text)
+			if err != nil {
+				fmt.Printf("There was a problem sending the message : %v", text)
+				return
+			}
+		case crrsp := <-CorrespChan:
+			correspondent = crrsp
 		}
+
 	}
 }
 
-func readInput(reader *Reader, textChan chan string) {
-	text, _ := reader.ReadString('\n')
-	textChan <- text
-}
+// Only reads and parses the configuration
+func readConfig() *config {
+	viper.SetConfigName(configFileName) // name of config file (without extension)
+	viper.BindPFlags(pflag.CommandLine)
+	viper.AddConfigPath(viper.GetString("c")) // path to look for the config file in
+	err := viper.ReadInConfig()               // Find and read the config file
+	if err := viper.ReadInConfig(); err != nil {
+		if _, ok := err.(viper.ConfigFileNotFoundError); ok {
+			log.Fatalf("%s %s", err, "Please make sure you give a path to the directory of the config and not to the config itself.")
+		} else {
+			log.Panicln(err)
+		}
+	}
+
+	viper.SetConfigType(configType)
+	var config config
+	err = viper.Unmarshal(&config)
+	if err != nil {
+		panic(fmt.Errorf("Unable to decode Config: %s \n", err))
+	}
+
+	// Check if we have contacts to message
+	if len(strings.TrimSpace(config.Contacts)) == 0 {
+		log.Panicln("You appear to have no contacts to message !")
+	}
+	// Check logging
+	config.LogStanzas[logFilePath] = path.Clean(config.LogStanzas[logFilePath])
+	on, err := strconv.ParseBool(config.LogStanzas[logStanzasOn])
+	if err != nil {
+		log.Panicln(err)
+	}
+	if d, e := isDirectory(config.LogStanzas[logFilePath]); (e != nil || !d) && on {
+		log.Panicln("The log file path could not be found or is not a directory.")
+	}
 
-var killChan = make(chan struct{})
+	return &config
+}
 
-// If an error occurs, this is used
+// If an error occurs, this is used to kill the client
 func errorHandler(err error) {
 	fmt.Printf("%v", err)
 	killChan <- struct{}{}
 }
 
-func handleMessage(s xmpp.Sender, p stanza.Packet) {
-	msg, ok := p.(stanza.Message)
-	if !ok {
-		_, _ = fmt.Fprintf(os.Stdout, "Ignoring packet: %T\n", p)
-		return
+// Read the client roster from the config. This does not check with the server that the roster is correct.
+// If user tries to send a message to someone not registered with the server, the server will return an error.
+func updateRosterFromConfig(g *gocui.Gui, config *config) {
+	viewState.contacts = append(strings.Split(config.Contacts, configContactSep), backFromContacts)
+}
+
+// Updates the menu panel of the view with the current user's roster.
+// Need to add support for Roster IQ stanzas to make this work.
+func askForRoster(client *xmpp.Client, g *gocui.Gui) {
+	// Not implemented yet !
+}
+
+func isDirectory(path string) (bool, error) {
+	fileInfo, err := os.Stat(path)
+	if err != nil {
+		return false, err
 	}
-	_, _ = fmt.Fprintf(os.Stdout, "Body = %s - from = %s\n", msg.Body, msg.From)
+	return fileInfo.IsDir(), err
 }

cmd/go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/bdlm/log v0.1.19
 	github.com/bdlm/std v0.0.0-20180922040903-fd3b596111c7
 	github.com/spf13/cobra v0.0.5
-	github.com/spf13/viper v1.4.0
+	github.com/spf13/viper v1.6.1
 	gosrc.io/xmpp v0.1.1
 )
 

go.mod

@@ -3,8 +3,11 @@ module gosrc.io/xmpp
 go 1.13
 
 require (
+	github.com/awesome-gocui/gocui v0.6.0 // indirect
 	github.com/google/go-cmp v0.3.1
 	github.com/google/uuid v1.1.1
+	github.com/spf13/viper v1.6.1 // indirect
 	golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7
 	nhooyr.io/websocket v1.6.5
+
 )