Under attack mode

README.md

@@ -200,6 +200,7 @@ Arguments passed to the process or set via environment variables are split into
 | --require-api-key-origin      | Require use of an API key for programmatic access to the API, unless the request origin matches this domain | `No restrictions on domain origin` | LT_REQUIRE_API_KEY_ORIGIN      |
 | --require-api-key-secret      | Require use of an API key for programmatic access to the API, unless the client also sends a secret match   | `No secrets required`              | LT_REQUIRE_API_KEY_SECRET      |
 | --require-api-key-fingerprint | Require use of an API key for programmatic access to the API, unless the client also matches a fingerprint  | `No fingerprinting required`       | LT_REQUIRE_API_KEY_FINGERPRINT |
+| --under-attack                | Enable under attack mode. When enabled, requests must be made with an API key                               | `Disabled`                         | LT_UNDER_ATTACK                |
 | --suggestions                 | Allow user suggestions                                                                                      | `Disabled`                         | LT_SUGGESTIONS                 |
 | --disable-files-translation   | Disable files translation                                                                                   | `File translation allowed`         | LT_DISABLE_FILES_TRANSLATION   |
 | --disable-web-ui              | Disable web ui                                                                                              | `Web Ui enabled`                   | LT_DISABLE_WEB_UI              |

libretranslate/app.py

@@ -364,6 +364,9 @@ def create_app(args):
                     if flood.fingerprint_mismatch(ip, get_fingerprint()):
                       need_key = True
 
+                  if args.under_attack and key_missing:
+                    need_key = True
+
                   if need_key:
                     description = _("Please contact the server operator to get an API key")
                     if args.get_api_key_link:
@@ -441,7 +444,8 @@ def create_app(args):
             swagger_url=swagger_url,
             available_locales=sorted([{'code': l['code'], 'name': _lazy(l['name'])} for l in get_available_locales(not args.debug)], key=lambda s: s['name']),
             current_locale=get_locale(),
-            alternate_locales=get_alternate_locale_links()
+            alternate_locales=get_alternate_locale_links(),
+            under_attack=args.under_attack,
         ))
 
         if args.require_api_key_secret:

libretranslate/default_values.py

@@ -151,6 +151,11 @@ _default_options_objects = [
         'default_value': False,
         'value_type': 'bool'
     },
+    {
+        'name': 'UNDER_ATTACK',
+        'default_value': False,
+        'value_type': 'bool'
+    },
     {
         'name': 'REQUIRE_API_KEY_FINGERPRINT',
         'default_value': False,

libretranslate/main.py

@@ -153,6 +153,12 @@ def get_args():
         action="store_true",
         help="Require use of an API key for programmatic access to the API, unless the client also matches a fingerprint",
     )
+    parser.add_argument(
+        "--under-attack",
+        default=DEFARGS['UNDER_ATTACK'],
+        action="store_true",
+        help="Enable under attack mode. When enabled, requests must be made with an API key",
+    )
     parser.add_argument(
         "--shared-storage",
         type=str,

libretranslate/templates/index.html

@@ -170,6 +170,15 @@
 		<div class="section no-pad-bot">
 			<div class="container">
 				<div class="row">
+					{% if under_attack %}
+					<div class="card horizontal">
+						<div class="card-stacked">
+							<div class="card-content center">
+								<i class="material-icons" style="position: relative; top: 4px;">warning</i> {{ _h("Due to bot abuse, translation requests are temporarily limited to users with a valid API key. Sorry for the inconvenience!") }}</p>
+							</div>
+						</div>
+					</div>
+					{% endif %}
 					<h3 class="header center">{{ _h("Translation API") }}</h3>
 					<div id="translation-type-btns" class="s12 center" v-if="filesTranslation === true">
 						<button type="button" class="btn btn-switch-type" @click="switchType('text')" :class="{'active': translationType === 'text'}">