[ie/tiktok] Add `device_id` extractor-arg (#9951)

Authored by: bashonly

2 files changed, 22 insertions, 10 deletions

diff --git a/README.md b/README.md
index ad98af7c4..1029d1a6d 100644
--- a/README.md
+++ b/README.md
@@ -1815,6 +1815,7 @@ The following extractors use this feature:
 * `manifest_app_version`: Default numeric app version to use with mobile API calls, e.g. `2023401020`
 * `aid`: Default app ID to use with mobile API calls, e.g. `1180`
 * `app_info`: Enable mobile API extraction with one or more app info strings in the format of `<iid>/[app_name]/[app_version]/[manifest_app_version]/[aid]`, where `iid` is the unique app install ID. `iid` is the only required value; all other values and their `/` separators can be omitted, e.g. `tiktok:app_info=1234567890123456789` or `tiktok:app_info=123,456/trill///1180,789//34.0.1/340001`
+* `device_id`: Enable mobile API extraction with a genuine device ID to be used with mobile API calls. Default is a random 19-digit string
 
 #### rokfinchannel
 * `tab`: Which tab to download - one of `new`, `top`, `videos`, `podcasts`, `streams`, `stacks`
diff --git a/yt_dlp/extractor/tiktok.py b/yt_dlp/extractor/tiktok.py
index 2fb41ba79..6d0d7eea3 100644
--- a/yt_dlp/extractor/tiktok.py
+++ b/yt_dlp/extractor/tiktok.py
@@ -1,8 +1,8 @@
+import functools
 import itertools
 import json
 import random
 import re
-import string
 import time
 import uuid
 
@@ -15,6 +15,7 @@ from ..utils import (
     UnsupportedError,
     UserNotLive,
     determine_ext,
+    filter_dict,
     format_field,
     int_or_none,
     join_nonempty,
@@ -49,11 +50,21 @@ class TikTokBaseIE(InfoExtractor):
     _APP_INFO = None
     _APP_USER_AGENT = None
 
-    @property
+    @functools.cached_property
     def _KNOWN_APP_INFO(self):
-        return self._configuration_arg('app_info', ie_key=TikTokIE)
+        # If we have a genuine device ID, we may not need any IID
+        default = [''] if self._KNOWN_DEVICE_ID else []
+        return self._configuration_arg('app_info', default, ie_key=TikTokIE)
 
-    @property
+    @functools.cached_property
+    def _KNOWN_DEVICE_ID(self):
+        return self._configuration_arg('device_id', [None], ie_key=TikTokIE)[0]
+
+    @functools.cached_property
+    def _DEVICE_ID(self):
+        return self._KNOWN_DEVICE_ID or str(random.randint(7250000000000000000, 7351147085025500000))
+
+    @functools.cached_property
     def _API_HOSTNAME(self):
         return self._configuration_arg(
             'api_hostname', ['api16-normal-c-useast1a.tiktokv.com'], ie_key=TikTokIE)[0]
@@ -115,7 +126,7 @@ class TikTokBaseIE(InfoExtractor):
             }, query=query)
 
     def _build_api_query(self, query):
-        return {
+        return filter_dict({
             **query,
             'device_platform': 'android',
             'os': 'android',
@@ -156,10 +167,10 @@ class TikTokBaseIE(InfoExtractor):
             'build_number': self._APP_INFO['app_version'],
             'region': 'US',
             'ts': int(time.time()),
-            'iid': self._APP_INFO['iid'],
-            'device_id': random.randint(7250000000000000000, 7351147085025500000),
+            'iid': self._APP_INFO.get('iid'),
+            'device_id': self._DEVICE_ID,
             'openudid': ''.join(random.choices('0123456789abcdef', k=16)),
-        }
+        })
 
     def _call_api(self, ep, query, video_id, fatal=True,
                   note='Downloading API JSON', errnote='Unable to download API page'):
@@ -848,7 +859,7 @@ class TikTokUserIE(TikTokBaseIE):
             'max_cursor': 0,
             'min_cursor': 0,
             'retry_type': 'no_retry',
-            'device_id': ''.join(random.choices(string.digits, k=19)),  # Some endpoints don't like randomized device_id, so it isn't directly set in _call_api.
+            'device_id': self._DEVICE_ID,  # Some endpoints don't like randomized device_id, so it isn't directly set in _call_api.
         }
 
         for page in itertools.count(1):
@@ -896,7 +907,7 @@ class TikTokBaseListIE(TikTokBaseIE):  # XXX: Conventionally, base classes shoul
             'cursor': 0,
             'count': 20,
             'type': 5,
-            'device_id': ''.join(random.choices(string.digits, k=19))
+            'device_id': self._DEVICE_ID,
         }
 
         for page in itertools.count(1):