feat: add i18n in login page (#5947)

* feat: add i18n in login page

* fix: add word space and put the app name into the title

* fix: remove duplicate replace title

* fix: prettier format code

* fix: fix typescript check warning

* fix: add zh-cn locale file code owner

* fix: use existing flag locale to the login page

Co-authored-by: Joe Previte <jjprevite@gmail.com>

src/browser/pages/login.html

@@ -10,7 +10,7 @@
       http-equiv="Content-Security-Policy"
       content="style-src 'self'; script-src 'self' 'unsafe-inline'; manifest-src 'self'; img-src 'self' data:; font-src 'self' data:;"
     />
-    <title>{{APP_NAME}} login</title>
+    <title>{{I18N_LOGIN_TITLE}}</title>
     <link rel="icon" href="{{CS_STATIC_BASE}}/src/browser/media/favicon-dark-support.svg" />
     <link rel="alternate icon" href="{{CS_STATIC_BASE}}/src/browser/media/favicon.ico" />
     <link rel="manifest" href="{{BASE}}/manifest.json" crossorigin="use-credentials" />
@@ -25,7 +25,7 @@
       <div class="card-box">
         <div class="header">
           <h1 class="main">{{WELCOME_TEXT}}</h1>
-          <div class="sub">Please log in below. {{PASSWORD_MSG}}</div>
+          <div class="sub">{{I18N_LOGIN_BELOW}} {{PASSWORD_MSG}}</div>
         </div>
         <div class="content">
           <form class="login-form" method="post">
@@ -38,11 +38,11 @@
                 autofocus
                 class="password"
                 type="password"
-                placeholder="PASSWORD"
+                placeholder="{{I18N_PASSWORD_PLACEHOLDER}}"
                 name="password"
                 autocomplete="current-password"
               />
-              <input class="submit -button" value="SUBMIT" type="submit" />
+              <input class="submit -button" value="{{I18N_SUBMIT}}" type="submit" />
             </div>
             {{ERROR}}
           </form>

src/node/cli.ts

@@ -180,7 +180,14 @@ export const options: Options<Required<UserProvidedArgs>> = {
   enable: { type: "string[]" },
   help: { type: "boolean", short: "h", description: "Show this output." },
   json: { type: "boolean" },
-  locale: { type: "string" }, // The preferred way to set the locale is via the UI.
+  locale: {
+    // The preferred way to set the locale is via the UI.
+    type: "string",
+    description: `
+      Set vscode display language and language to show on the login page, more info see 
+      https://en.wikipedia.org/wiki/IETF_language_tag
+    `,
+  },
   open: { type: "boolean", description: "Open in browser on startup. Does not work remotely." },
 
   "bind-addr": {

src/node/i18n/index.ts

@@ -0,0 +1,21 @@
+import i18next, { init } from "i18next"
+import * as en from "./locales/en.json"
+import * as zhCn from "./locales/zh-cn.json"
+
+init({
+  lng: "en",
+  fallbackLng: "en", // language to use if translations in user language are not available.
+  returnNull: false,
+  lowerCaseLng: true,
+  debug: process.env.NODE_ENV === "development",
+  resources: {
+    en: {
+      translation: en,
+    },
+    "zh-cn": {
+      translation: zhCn,
+    },
+  },
+})
+
+export default i18next

src/node/i18n/locales/en.json

@@ -0,0 +1,13 @@
+{
+  "LOGIN_TITLE": "{{app}} login",
+  "LOGIN_BELOW": "Please log in below.",
+  "WELCOME": "Welcome to {{app}}",
+  "LOGIN_PASSWORD": "Check the config file at {{configFile}} for the password.",
+  "LOGIN_USING_ENV_PASSWORD": "Password was set from $PASSWORD.",
+  "LOGIN_USING_HASHED_PASSWORD": "Password was set from $HASHED_PASSWORD.",
+  "SUBMIT": "SUBMIT",
+  "PASSWORD_PLACEHOLDER": "PASSWORD",
+  "LOGIN_RATE_LIMIT": "Login rate limited!",
+  "MISS_PASSWORD": "Missing password",
+  "INCORRECT_PASSWORD": "Incorrect password"
+}

src/node/i18n/locales/zh-cn.json

@@ -0,0 +1,13 @@
+{
+  "LOGIN_TITLE": "{{app}} 登录",
+  "LOGIN_BELOW": "请在下面登录。",
+  "WELCOME": "欢迎来到 {{app}}",
+  "LOGIN_PASSWORD": "查看配置文件 {{configFile}} 中的密码。",
+  "LOGIN_USING_ENV_PASSWORD": "密码在 $PASSWORD 中设置。",
+  "LOGIN_USING_HASHED_PASSWORD": "密码在 $HASHED_PASSWORD 中设置。",
+  "SUBMIT": "提交",
+  "PASSWORD_PLACEHOLDER": "密码",
+  "LOGIN_RATE_LIMIT": "登录速率限制!",
+  "MISS_PASSWORD": "缺少密码",
+  "INCORRECT_PASSWORD": "密码不正确"
+}

src/node/routes/login.ts

@@ -7,6 +7,7 @@ import { CookieKeys } from "../../common/http"
 import { rootPath } from "../constants"
 import { authenticated, getCookieOptions, redirect, replaceTemplates } from "../http"
 import { getPasswordMethod, handlePasswordValidation, humanPath, sanitizeString, escapeHtml } from "../util"
+import i18n from "../i18n"
 
 // RateLimiter wraps around the limiter library for logins.
 // It allows 2 logins every minute plus 12 logins every hour.
@@ -28,21 +29,26 @@ export class RateLimiter {
 
 const getRoot = async (req: Request, error?: Error): Promise<string> => {
   const content = await fs.readFile(path.join(rootPath, "src/browser/pages/login.html"), "utf8")
+  const locale = req.args["locale"] || "en"
+  i18n.changeLanguage(locale)
   const appName = req.args["app-name"] || "code-server"
-  const welcomeText = req.args["welcome-text"] || `Welcome to ${appName}`
-  let passwordMsg = `Check the config file at ${humanPath(os.homedir(), req.args.config)} for the password.`
+  const welcomeText = req.args["welcome-text"] || (i18n.t("WELCOME", { app: appName }) as string)
+  let passwordMsg = i18n.t("LOGIN_PASSWORD", { configFile: humanPath(os.homedir(), req.args.config) })
   if (req.args.usingEnvPassword) {
-    passwordMsg = "Password was set from $PASSWORD."
+    passwordMsg = i18n.t("LOGIN_USING_ENV_PASSWORD")
   } else if (req.args.usingEnvHashedPassword) {
-    passwordMsg = "Password was set from $HASHED_PASSWORD."
+    passwordMsg = i18n.t("LOGIN_USING_HASHED_PASSWORD")
   }
 
   return replaceTemplates(
     req,
     content
-      .replace(/{{APP_NAME}}/g, appName)
+      .replace(/{{I18N_LOGIN_TITLE}}/g, i18n.t("LOGIN_TITLE", { app: appName }))
       .replace(/{{WELCOME_TEXT}}/g, welcomeText)
       .replace(/{{PASSWORD_MSG}}/g, passwordMsg)
+      .replace(/{{I18N_LOGIN_BELOW}}/g, i18n.t("LOGIN_BELOW"))
+      .replace(/{{I18N_PASSWORD_PLACEHOLDER}}/g, i18n.t("PASSWORD_PLACEHOLDER"))
+      .replace(/{{I18N_SUBMIT}}/g, i18n.t("SUBMIT"))
       .replace(/{{ERROR}}/, error ? `<div class="error">${escapeHtml(error.message)}</div>` : ""),
   )
 }
@@ -70,11 +76,11 @@ router.post<{}, string, { password: string; base?: string }, { to?: string }>("/
   try {
     // Check to see if they exceeded their login attempts
     if (!limiter.canTry()) {
-      throw new Error("Login rate limited!")
+      throw new Error(i18n.t("LOGIN_RATE_LIMIT") as string)
     }
 
     if (!password) {
-      throw new Error("Missing password")
+      throw new Error(i18n.t("MISS_PASSWORD") as string)
     }
 
     const passwordMethod = getPasswordMethod(hashedPasswordFromArgs)
@@ -108,7 +114,7 @@ router.post<{}, string, { password: string; base?: string }, { to?: string }>("/
       }),
     )
 
-    throw new Error("Incorrect password")
+    throw new Error(i18n.t("INCORRECT_PASSWORD") as string)
   } catch (error: any) {
     const renderedHtml = await getRoot(req, error)
     res.send(renderedHtml)