Support profile files to customize hterm

Makefile

@@ -13,9 +13,6 @@ bindata:
 bindata/static: bindata
 	mkdir bindata/static
 
-bindata/templates: bindata
-	mkdir bindata/templates
-
 bindata/static/hterm.js: bindata/static libapps/hterm/js/*.js
 	cd libapps && \
 	LIBDOT_SEARCH_PATH=`pwd` ./libdot/bin/concat.sh -i ./hterm/concat/hterm_all.concat -o ../bindata/static/hterm.js

README.md

@@ -45,12 +45,28 @@ By default, gotty starts a web server at port 8080. Open the URL on your web bro
 --permit-write, -w                                           Permit clients to write to the TTY (BE CAREFUL) [$GOTTY_PERMIT_WRITE]
 --credential, -c                                             Credential for Basic Authentication (ex: user:pass) [$GOTTY_CREDENTIAL]
 --random-url, -r                                             Add a random string to the URL [$GOTTY_RANDOM_URL]
+--profile-file, -f "~/.gotty"                                Path to profile file [$GOTTY_PROFILE_FILE]
 --title-format "GoTTY - {{ .Command }} ({{ .Hostname }})"    Title format of browser window [$GOTTY_TITLE_FORMAT]
 --version, -v                                                print the version
 ```
 
 By default, gotty doesn't allow clients to send any keystrokes or commands except terminal window resizing. When you want to permit clients to write input to the PTY, add the `-w` option. However, accepting input from remote clients is dangerous for most commands. Make sure that only trusted clients can connect to your gotty server when you activate this option. If you need interaction with the PTY, consider starting gotty with tmux or GNU Screen and run your main command on it.
 
+### Profile File
+
+You can customize your terminal (hterm) by providing a profile file to the `gotty` command, which is a JSON file that has a map of preference keys and values. Gotty loads a profile file at `~/.gotty` by default when it exists.
+
+The following example makes the font size smaller and the background color a little bit blue.
+
+```json
+{
+    "font-size": 5,
+    "background-color": "rgb(16, 16, 32)"
+}
+```
+
+Available preferences are listed in [the hterm source code](https://chromium.googlesource.com/apps/libapps/+/master/hterm/js/hterm_preference_manager.js)
+
 ## Sharing with Multiple Clients
 
 Gotty starts a new process when a new client connects to the server. This means users cannot share a single terminal with others by default. However, you can use terminal multiplexers for sharing a single process with multiple clients.

app/app.go

@@ -3,12 +3,16 @@ package app
 import (
 	"crypto/rand"
 	"encoding/base64"
+	"encoding/json"
 	"errors"
+	"io/ioutil"
 	"log"
 	"math/big"
 	"net"
 	"net/http"
+	"os"
 	"os/exec"
+	"os/user"
 	"strconv"
 	"strings"
 	"text/template"
@@ -22,6 +26,8 @@ type App struct {
 	options Options
 
 	upgrader *websocket.Upgrader
+
+	preferences   map[string]interface{}
 	titleTemplate *template.Template
 }
 
@@ -31,16 +37,42 @@ type Options struct {
 	PermitWrite bool
 	Credential  string
 	RandomUrl   bool
+	ProfileFile string
 	TitleFormat string
 	Command     []string
 }
 
+const DefaultProfileFilePath = "~/.gotty"
+
 func New(options Options) (*App, error) {
 	titleTemplate, err := template.New("title").Parse(options.TitleFormat)
 	if err != nil {
 		return nil, errors.New("Title format string syntax error")
 	}
 
+	prefString := []byte{}
+	prefPath := options.ProfileFile
+	if options.ProfileFile == DefaultProfileFilePath {
+		usr, _ := user.Current()
+		prefPath = usr.HomeDir + "/.gotty"
+	}
+	if _, err = os.Stat(prefPath); os.IsNotExist(err) {
+		if options.ProfileFile != DefaultProfileFilePath {
+			return nil, err
+		}
+	} else {
+		log.Printf("Loading profile path: %s", prefPath)
+		prefString, _ = ioutil.ReadFile(prefPath)
+	}
+	if len(prefString) == 0 {
+		prefString = []byte(("{}"))
+	}
+	var prefMap map[string]interface{}
+	err = json.Unmarshal(prefString, &prefMap)
+	if err != nil {
+		return nil, err
+	}
+
 	return &App{
 		options: options,
 
@@ -49,6 +81,8 @@ func New(options Options) (*App, error) {
 			WriteBufferSize: 1024,
 			Subprotocols:    []string{"gotty"},
 		},
+
+		preferences:   prefMap,
 		titleTemplate: titleTemplate,
 	}, nil
 }

app/client_context.go

@@ -30,6 +30,7 @@ const (
 const (
 	Output         = '0'
 	SetWindowTitle = '1'
+	SetPreferences = '2'
 )
 
 type argResizeTerminal struct {
@@ -114,6 +115,15 @@ func (context *clientContext) sendInitialize() error {
 	}
 	writer.Close()
 
+	prefs, _ := json.Marshal(context.app.preferences)
+	writer, err = context.connection.NextWriter(websocket.TextMessage)
+	if err != nil {
+		return err
+	}
+	writer.Write([]byte{SetPreferences})
+	writer.Write(prefs)
+	writer.Close()
+
 	return nil
 }
 

app/resource.go

@@ -71,7 +71,7 @@ func (fi bindataFileInfo) Sys() interface{} {
 	return nil
 }
 
-var _staticGottyJs = []byte("\x1f\x8b\x08\x00\x00\x09\x6e\x88\x00\xff\x8c\x54\xc1\x8e\xda\x30\x10\xbd\xf3\x15\x56\x2e\x38\x2a\xf2\xc2\xa5\x87\x20\xd4\xc3\xaa\x3d\xb4\x55\x57\x2a\xb4\x7b\x58\xed\xc1\x89\x07\x62\x61\x3c\xc8\x76\x88\xd2\x2a\xff\x5e\x3b\x24\x10\x20\xa0\xce\x21\x72\x66\xde\x7b\xf3\x3c\x76\x42\xd7\x85\xce\x9c\x44\x4d\x63\xf2\x77\x44\x7c\x1c\xb8\x21\xb9\x73\x7b\xfb\x59\xf3\x54\x81\x20\x0b\x52\x4a\x2d\xb0\x64\x0a\x33\x1e\xa0\x6c\x6f\xd0\x61\x86\x8a\x2c\x16\x24\x6a\xb0\x49\x34\x3f\x91\x0b\xe3\x0b\x84\x5e\x68\x7c\x22\xe3\xd2\xda\xe4\xe9\x69\x4c\x92\xb0\x0c\xab\x98\x7c\xb8\x51\xce\xd1\xba\x81\xf4\x9e\xbb\x5c\xf3\x1d\xf8\x92\x27\x8f\xcf\xbd\x3a\x27\xd6\x77\x7c\x8b\x36\xe8\x5c\x15\xbd\x9f\xcb\x65\xc8\x6b\x28\xc9\x2b\xa4\x4b\xcc\xb6\xe0\xa8\x77\x37\x39\xd3\xe2\xf9\xe8\x04\x76\x60\x76\xed\x6b\x69\x19\x6a\xdc\x83\xf6\xf4\xd3\x80\xe0\x00\xda\x75\x53\x0a\x91\x07\x06\x13\xb0\xe6\x85\x72\x4b\x87\x86\x6f\xa0\xed\xa7\x64\xca\xda\x0c\xfb\xee\x77\xa1\x68\x3c\x3a\xf1\x02\xad\xc5\x1d\x25\x56\xfe\x21\x75\x00\xcd\x2f\x51\xde\x45\x57\xfb\x09\x5c\x54\x7d\x3b\x7d\x27\xdd\x16\x24\x7a\x44\x43\x94\xc8\xf6\x85\xcd\x2f\x14\x43\xf8\x3c\xea\xdf\xab\x6f\x50\x59\x67\x70\x0b\x7d\x45\x9f\xb9\x16\x6d\x87\x61\x41\x0b\x1a\x4d\x23\x3f\xff\x00\x9a\x5f\x60\xea\xdb\x16\x01\xbf\x74\x46\xea\x8d\xd7\xbf\x6e\x39\xe4\xe8\xbc\x4b\x2b\xff\x5c\x98\xf2\xa7\x54\xec\xb4\x9d\x10\x83\xa5\x7d\x64\xef\xa6\x10\x22\x9a\x05\xcf\x5f\x97\x2f\x3f\x98\x6d\xfc\xc8\x75\x35\x8c\x0c\x71\x2b\xde\x8f\xd6\x49\xd2\x2d\x26\x0f\xd1\xc1\x6e\xd2\x3c\xef\xe3\xea\xc1\x4a\x7c\x93\x8d\x1f\xce\xfb\x78\xde\xda\x3a\xae\x94\x1f\x72\x8a\xdc\x08\xda\x3b\xa3\xfa\xfa\x52\x09\xc8\xfc\xcd\x74\x40\x05\x66\xc5\xce\x5f\x6a\x96\xa2\xa8\x5a\x46\xdd\xff\x04\x76\x60\xed\xf1\x52\xdf\xff\x0a\x04\x77\xdc\x03\x9a\x3c\x0b\x2f\xcc\x2a\x99\x01\x9d\xf5\x2c\xd8\x52\xba\x2c\xa7\x67\xcc\xdb\xf4\xbd\xaf\x91\x71\x0b\x64\x3c\x1d\x27\x03\x1b\x43\x56\x1a\xe9\xe0\xd7\xea\xcb\xec\x23\x0d\xdc\xab\xeb\x97\x1a\xe0\xdb\xf9\x95\xd4\x6c\x48\xca\x82\x7b\x6d\x7e\x2c\x2b\xe9\x14\xfc\x87\xd6\xf1\x7c\xea\xde\x40\x32\x85\xf6\xf1\x38\x3a\xd3\x36\xc7\xf2\xe5\x00\x46\xf1\x8a\x46\xcf\xa8\x35\x34\x04\xf2\x1c\x14\x44\x34\x21\xba\x50\xaa\xd7\xbe\xe1\x15\xfa\xce\x39\xd6\xa3\x3a\xf6\xbf\x90\x7f\x01\x00\x00\xff\xff\x5d\xa5\x6c\xd7\xae\x05\x00\x00")
+var _staticGottyJs = []byte("\x1f\x8b\x08\x00\x00\x09\x6e\x88\x00\xff\x8c\x54\xc1\x8e\x9b\x30\x10\xbd\xe7\x2b\x2c\x2e\x31\x6a\xe4\xdd\xf4\xd0\x43\xa2\x55\x0f\xab\xed\xa1\xad\xba\x55\x93\x76\x0f\xab\x3d\x18\x33\x09\x6e\x1c\x1b\xd9\x66\x51\x5a\xf1\xef\x1d\x13\x48\x08\x61\x51\xe7\x80\x60\xfc\xde\xf3\xf3\xcc\x18\xba\x29\xb4\xf0\xd2\x68\x1a\x93\xbf\x13\x82\xf1\xca\x2d\xc9\xbc\xcf\xdd\x83\xe6\x89\x82\x94\xdc\x91\x52\xea\xd4\x94\x4c\x19\xc1\x03\x94\xe5\xd6\x78\x23\x8c\x22\x77\x77\x24\xaa\xb1\x8b\x68\x79\x22\x17\x16\x17\x08\xbd\xd0\xf8\x48\xa6\xa5\x73\x8b\x9b\x9b\x29\x59\x84\xd7\xf0\x16\x93\x77\x57\xca\x99\x71\x7e\x20\x9d\x73\x9f\x69\xbe\x07\x5c\x42\xf2\xf4\xbc\x57\xeb\xc4\xe1\x8e\xcf\xd1\xd6\x78\x7f\x88\x5e\xce\xcb\x65\xc8\x6b\x28\xc9\x13\x24\x2b\x23\x76\xe0\x29\xba\x9b\x9d\x69\xf1\x72\x72\x02\x7b\xb0\xfb\xe6\xb3\x74\xcc\x68\x93\x83\x46\xfa\xa9\x40\xf0\x0a\xda\xb7\x55\x0a\x91\x05\x06\x4b\x61\xc3\x0b\xe5\x57\xde\x58\xbe\x85\x66\x3f\x25\x13\xd6\x64\xd8\x57\x3c\x85\xa2\xf1\x72\x94\xc7\x84\x02\x6e\x69\xeb\x27\x44\x40\x35\x72\x47\xc6\x1a\x1f\x52\x1f\xb5\x2e\x50\x68\xb6\x5d\xfb\x01\x3c\x3d\x74\x5d\x77\x0d\xb7\x27\x95\x06\x11\x35\x51\x1a\x96\x17\x2e\xbb\x50\x0c\x81\x79\xa3\x7f\xad\xbf\xc0\xc1\x79\x6b\x76\xd0\x55\xc4\x4c\x5f\xb4\xa9\x99\x03\x9d\xd2\xe8\x36\xc2\x36\x05\xd0\xf2\x02\x53\x5d\x6f\x11\xf0\x2b\x6f\xa5\xde\xa2\x7e\x7f\xcb\x21\x47\xe7\x53\x3a\xf9\xe7\xc2\x14\x36\xb3\xd8\x6b\x37\x23\xd6\x94\x6e\xcc\xde\xd5\x42\x88\x68\x1e\x3c\x7f\x5e\x3d\x7e\x63\xae\xf6\x23\x37\x87\x61\x64\x88\x6b\xf1\x6e\x34\x4e\x16\xed\xcb\x6c\x14\x1d\xec\x2e\xea\xe7\xdb\xb8\x6a\x70\x25\xbe\xca\xc6\xa3\xf5\x3e\xf6\x5b\x3b\xcf\x95\xc2\x22\x27\x86\xdb\xb4\x3b\x95\x55\x7f\xa8\x52\x10\x38\x9a\x1e\x68\x6a\x44\xb1\xc7\xd9\x67\x89\x49\x0f\x0d\xa3\xea\xde\x94\x3d\x38\x77\x9c\xfd\xb7\x2f\x4b\xca\x3d\x47\x40\x9d\x67\xe1\x83\x39\x25\x05\xd0\x79\xc7\x82\x2b\xa5\x17\x19\x3d\x63\x9e\x6f\x5f\xba\x1a\x82\x3b\x20\xd3\xdb\xe9\x62\xe0\x60\x86\x95\x56\x7a\xf8\xb9\xfe\x34\xff\x40\x03\xb7\x37\x7e\x89\x05\xbe\x5b\xf6\xa4\xe6\x43\x52\x0e\xfc\x53\xfd\xff\x59\x4b\xaf\xe0\xbf\xb5\xde\xf7\xb4\x72\x0b\x1b\xb0\xa0\x05\x84\x9f\x50\x3d\x5b\x39\xb7\x6e\x50\xf0\x31\xf9\x0d\xc2\xb3\x1d\xce\x3e\xed\xf0\x62\xb6\x31\xf6\x81\x63\x49\x4e\x75\x45\xc8\xd0\x74\xd7\xc6\xb7\xe0\xbf\x23\xd9\xd1\x38\x9c\x21\x40\x67\x5d\x17\xcf\x98\x78\xe9\x5f\xca\xf1\x93\x1d\x27\xaf\xea\xb4\x5a\x28\xe3\xc6\x1b\xdd\xb6\xc3\x65\xa6\x7c\x7c\x05\xab\xf8\x81\x46\xf7\x46\x6b\xa8\x09\xe4\x3e\x28\xa4\xd1\x8c\xe8\x42\xa9\xce\xf6\x35\xaf\xd0\x6f\x4c\x68\x35\xa9\x62\x1a\x4f\xfe\x05\x00\x00\xff\xff\x0d\xc1\x26\x9b\xaf\x06\x00\x00")
 
 func staticGottyJsBytes() ([]byte, error) {
 	return bindataRead(
@@ -86,7 +86,7 @@ func staticGottyJs() (*asset, error) {
 		return nil, err
 	}
 
-	info := bindataFileInfo{name: "static/gotty.js", size: 1454, mode: os.FileMode(436), modTime: time.Unix(1440329892, 0)}
+	info := bindataFileInfo{name: "static/gotty.js", size: 1711, mode: os.FileMode(436), modTime: time.Unix(1440336972, 0)}
 	a := &asset{bytes: bytes, info: info}
 	return a, nil
 }

main.go

@@ -43,6 +43,12 @@ func main() {
 			Usage:  "Add a random string to the URL",
 			EnvVar: "GOTTY_RANDOM_URL",
 		},
+		cli.StringFlag{
+			Name:   "profile-file, f",
+			Value:  app.DefaultProfileFilePath,
+			Usage:  "Path to profile file",
+			EnvVar: "GOTTY_PROFILE_FILE",
+		},
 		cli.StringFlag{
 			Name:   "title-format",
 			Value:  "GoTTY - {{ .Command }} ({{ .Hostname }})",
@@ -64,6 +70,7 @@ func main() {
 				c.Bool("permit-write"),
 				c.String("credential"),
 				c.Bool("random-url"),
+				c.String("profile-file"),
 				c.String("title-format"),
 				c.Args(),
 			},

resources/gotty.js

@@ -7,7 +7,8 @@
     var term;
 
     ws.onopen = function(event) {
-        hterm.defaultStorage = new lib.Storage.Local()
+        hterm.defaultStorage = new lib.Storage.Local();
+        hterm.defaultStorage.clear();
 
         term = new hterm.Terminal();
 
@@ -46,6 +47,12 @@
         case '1':
             term.setWindowTitle(data);
             break;
+        case '2':
+            preferences = JSON.parse(data);
+            Object.keys(preferences).forEach(function(key) {
+                term.getPrefs().set(key, preferences[key]);
+            });
+            break;
         }
     }