[extractor/GoogleDrive] Add folder extractor (#4009)

Closes #3388
Authored by: evansp, pukkandan

3 files changed, 61 insertions, 2 deletions

diff --git a/yt_dlp/extractor/common.py b/yt_dlp/extractor/common.py
index 7adabf6f9..080d682eb 100644
--- a/yt_dlp/extractor/common.py
+++ b/yt_dlp/extractor/common.py
@@ -1188,7 +1188,7 @@ class InfoExtractor:
             self.report_warning('unable to extract %s' % _name + bug_reports_message())
             return None
 
-    def _search_json(self, start_pattern, string, name, video_id, *, end_pattern='', contains_pattern='.+', fatal=True, **kwargs):
+    def _search_json(self, start_pattern, string, name, video_id, *, end_pattern='', contains_pattern='(?s:.+)', fatal=True, **kwargs):
         """Searches string for the JSON object specified by start_pattern"""
         # NB: end_pattern is only used to reduce the size of the initial match
         return self._parse_json(
diff --git a/yt_dlp/extractor/extractors.py b/yt_dlp/extractor/extractors.py
index 9e1ef4067..c7167a2cf 100644
--- a/yt_dlp/extractor/extractors.py
+++ b/yt_dlp/extractor/extractors.py
@@ -597,7 +597,10 @@ from .godtube import GodTubeIE
 from .gofile import GofileIE
 from .golem import GolemIE
 from .goodgame import GoodGameIE
-from .googledrive import GoogleDriveIE
+from .googledrive import (
+    GoogleDriveIE,
+    GoogleDriveFolderIE,
+)
 from .googlepodcasts import (
     GooglePodcastsIE,
     GooglePodcastsFeedIE,
diff --git a/yt_dlp/extractor/googledrive.py b/yt_dlp/extractor/googledrive.py
index c0905f86a..b4f483298 100644
--- a/yt_dlp/extractor/googledrive.py
+++ b/yt_dlp/extractor/googledrive.py
@@ -276,3 +276,59 @@ class GoogleDriveIE(InfoExtractor):
             'automatic_captions': self.extract_automatic_captions(
                 video_id, subtitles_id, hl),
         }
+
+
+class GoogleDriveFolderIE(InfoExtractor):
+    IE_NAME = 'GoogleDrive:Folder'
+    _VALID_URL = r'https?://(?:docs|drive)\.google\.com/drive/folders/(?P<id>[\w-]{28,})'
+    _TESTS = [{
+        'url': 'https://drive.google.com/drive/folders/1dQ4sx0-__Nvg65rxTSgQrl7VyW_FZ9QI',
+        'info_dict': {
+            'id': '1dQ4sx0-__Nvg65rxTSgQrl7VyW_FZ9QI',
+            'title': 'Forrest'
+        },
+        'playlist_count': 3,
+    }]
+    _BOUNDARY = '=====vc17a3rwnndj====='
+    _REQUEST = "/drive/v2beta/files?openDrive=true&reason=102&syncType=0&errorRecovery=false&q=trashed%20%3D%20false%20and%20'{folder_id}'%20in%20parents&fields=kind%2CnextPageToken%2Citems(kind%2CmodifiedDate%2CmodifiedByMeDate%2ClastViewedByMeDate%2CfileSize%2Cowners(kind%2CpermissionId%2Cid)%2ClastModifyingUser(kind%2CpermissionId%2Cid)%2ChasThumbnail%2CthumbnailVersion%2Ctitle%2Cid%2CresourceKey%2Cshared%2CsharedWithMeDate%2CuserPermission(role)%2CexplicitlyTrashed%2CmimeType%2CquotaBytesUsed%2Ccopyable%2CfileExtension%2CsharingUser(kind%2CpermissionId%2Cid)%2Cspaces%2Cversion%2CteamDriveId%2ChasAugmentedPermissions%2CcreatedDate%2CtrashingUser(kind%2CpermissionId%2Cid)%2CtrashedDate%2Cparents(id)%2CshortcutDetails(targetId%2CtargetMimeType%2CtargetLookupStatus)%2Ccapabilities(canCopy%2CcanDownload%2CcanEdit%2CcanAddChildren%2CcanDelete%2CcanRemoveChildren%2CcanShare%2CcanTrash%2CcanRename%2CcanReadTeamDrive%2CcanMoveTeamDriveItem)%2Clabels(starred%2Ctrashed%2Crestricted%2Cviewed))%2CincompleteSearch&appDataFilter=NO_APP_DATA&spaces=drive&pageToken={page_token}&maxResults=50&supportsTeamDrives=true&includeItemsFromAllDrives=true&corpora=default&orderBy=folder%2Ctitle_natural%20asc&retryCount=0&key={key} HTTP/1.1"
+    _DATA = f'''--{_BOUNDARY}
+content-type: application/http
+content-transfer-encoding: binary
+
+GET %s
+
+--{_BOUNDARY}
+'''
+
+    def _call_api(self, folder_id, key, data, **kwargs):
+        response = self._download_webpage(
+            'https://clients6.google.com/batch/drive/v2beta',
+            folder_id, data=data.encode('utf-8'),
+            headers={
+                'Content-Type': 'text/plain;charset=UTF-8;',
+                'Origin': 'https://drive.google.com',
+            }, query={
+                '$ct': f'multipart/mixed; boundary="{self._BOUNDARY}"',
+                'key': key
+            }, **kwargs)
+        return self._search_json('', response, 'api response', folder_id, **kwargs) or {}
+
+    def _get_folder_items(self, folder_id, key):
+        page_token = ''
+        while page_token is not None:
+            request = self._REQUEST.format(folder_id=folder_id, page_token=page_token, key=key)
+            page = self._call_api(folder_id, key, self._DATA % request)
+            yield from page['items']
+            page_token = page.get('nextPageToken')
+
+    def _real_extract(self, url):
+        folder_id = self._match_id(url)
+
+        webpage = self._download_webpage(url, folder_id)
+        key = self._search_regex(r'"(\w{39})"', webpage, 'key')
+
+        folder_info = self._call_api(folder_id, key, self._DATA % f'/drive/v2beta/files/{folder_id} HTTP/1.1', fatal=False)
+
+        return self.playlist_from_matches(
+            self._get_folder_items(folder_id, key), folder_id, folder_info.get('title'),
+            ie=GoogleDriveIE, getter=lambda item: f'https://drive.google.com/file/d/{item["id"]}')