How to download specific Google Drive folder using Python?

Question

I'm trying to download specific folders from Google Drive.

I tried this example http://www.mwclearning.com/?p=1608 but its download all the files from G-Drive.

EX: If I have two folders in Google Drive say..

• A folder having -> 1 , 2 Files
• B folder having -> 3, 4, 5 Files

If I want to download folder A then only 1 , 2 files should get downloaded..

Any suggestion or help could be very helpful.

Thanks in advance.

Solution 1

Use Drive credentials.json Downloaded from your Drive API

from __future__ import print_function
import pickle
import os
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
from oauth2client import client
from oauth2client import tools
from oauth2client.file import Storage
from apiclient.http import MediaFileUpload, MediaIoBaseDownload
import io
from apiclient import errors
from apiclient import http
import logging
from apiclient import discovery
# If modifying these scopes, delete the file token.pickle.
SCOPES = ['https://www.googleapis.com/auth/drive']
# To list folders
def listfolders(service, filid, des):
    results = service.files().list(
        pageSize=1000, q="\'" + filid + "\'" + " in parents",
        fields="nextPageToken, files(id, name, mimeType)").execute()
    # logging.debug(folder)
    folder = results.get('files', [])
    for item in folder:
        if str(item['mimeType']) == str('application/vnd.google-apps.folder'):
            if not os.path.isdir(des+"/"+item['name']):
                os.mkdir(path=des+"/"+item['name'])
            print(item['name'])
            listfolders(service, item['id'], des+"/"+item['name'])  # LOOP un-till the files are found
        else:
            downloadfiles(service, item['id'], item['name'], des)
            print(item['name'])
    return folder
# To Download Files
def downloadfiles(service, dowid, name,dfilespath):
    request = service.files().get_media(fileId=dowid)
    fh = io.BytesIO()
    downloader = MediaIoBaseDownload(fh, request)
    done = False
    while done is False:
        status, done = downloader.next_chunk()
        print("Download %d%%." % int(status.progress() * 100))
    with io.open(dfilespath + "/" + name, 'wb') as f:
        fh.seek(0)
        f.write(fh.read())
def main():
    """Shows basic usage of the Drive v3 API.
    Prints the names and ids of the first 10 files the user has access to.
    """
    creds = None
    # The file token.pickle stores the user's access and refresh tokens, and is
    # created automatically when the authorization flow completes for the first
    # time.
    if os.path.exists('token.pickle'):
        with open('token.pickle', 'rb') as token:
            creds = pickle.load(token)
    # If there are no (valid) credentials available, let the user log in.
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file(
                'credentials.json', SCOPES)  # credentials.json download from drive API
            creds = flow.run_local_server()
        # Save the credentials for the next run
        with open('token.pickle', 'wb') as token:
            pickle.dump(creds, token)
    service = build('drive', 'v3', credentials=creds)
    # Call the Drive v3 API
    Folder_id = "'PAST YOUR SHARED FOLDER ID'"  # Enter The Downloadable folder ID From Shared Link
    results = service.files().list(
        pageSize=1000, q=Folder_id+" in parents", fields="nextPageToken, files(id, name, mimeType)").execute()
    items = results.get('files', [])
    if not items:
        print('No files found.')
    else:
        print('Files:')
        for item in items:
            if item['mimeType'] == 'application/vnd.google-apps.folder':
                if not os.path.isdir("Folder"):
                    os.mkdir("Folder")
                bfolderpath = os.getcwd()+"/Folder/"
                if not os.path.isdir(bfolderpath+item['name']):
                    os.mkdir(bfolderpath+item['name'])
                folderpath = bfolderpath+item['name']
                listfolders(service, item['id'], folderpath)
            else:
                if not os.path.isdir("Folder"):
                    os.mkdir("Folder")
                bfolderpath = os.getcwd()+"/Folder/"
                if not os.path.isdir(bfolderpath + item['name']):
                    os.mkdir(bfolderpath + item['name'])
                filepath = bfolderpath + item['name']
                downloadfiles(service, item['id'], item['name'], filepath)
if __name__ == '__main__':
    main()

Solution 2

Try to check the Google Drive API documentation, you can see here the sample code use to perform a file download using Python.

file_id = '0BwwA4oUTeiV1UVNwOHItT0xfa2M'
request = drive_service.files().get_media(fileId=file_id)
fh = io.BytesIO()
downloader = MediaIoBaseDownload(fh, request)
done = False
while done is False:
    status, done = downloader.next_chunk()
    print "Download %d%%." % int(status.progress() * 100)

For the folders part, you can check here on how to get it.

For more information, you can check this tutorial and YT video.

Solution 3

Here's just the code that deals specifically with downloading a folder recursively.

I've tried to keep it to-the-point, omitting code that's described in tutorials already. I expect you to already have the ID of the folder that you want to download.

The part elif not itemType.startswith('application/'): has the purpose of skipping any Drive-format documents. However, the check is overly-simplistic, so you might want to improve it or remove it.

from __future__ import print_function
import pickle
import os.path
import io
from googleapiclient.discovery import build
from googleapiclient.http import MediaIoBaseDownload
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request
# If modifying these scopes, delete the file token.pickle.
SCOPES = ['https://www.googleapis.com/auth/drive.readonly']
def main():
    """Based on the quickStart.py example at
    https://developers.google.com/drive/api/v3/quickstart/python
    """
    creds = getCredentials()
    service = build('drive', 'v3', credentials=creds)
    folderId = ""
    destinationFolder = ""
    downloadFolder(service, folderId, destinationFolder)
def downloadFolder(service, fileId, destinationFolder):
    if not os.path.isdir(destinationFolder):
        os.mkdir(path=destinationFolder)
    results = service.files().list(
        pageSize=300,
        q="parents in '{0}'".format(fileId),
        fields="files(id, name, mimeType)"
        ).execute()
    items = results.get('files', [])
    for item in items:
        itemName = item['name']
        itemId = item['id']
        itemType = item['mimeType']
        filePath = destinationFolder + "/" + itemName
        if itemType == 'application/vnd.google-apps.folder':
            print("Stepping into folder: {0}".format(filePath))
            downloadFolder(service, itemId, filePath) # Recursive call
        elif not itemType.startswith('application/'):
            downloadFile(service, itemId, filePath)
        else:
            print("Unsupported file: {0}".format(itemName))
def downloadFile(service, fileId, filePath):
    # Note: The parent folders in filePath must exist
    print("-> Downloading file with id: {0} name: {1}".format(fileId, filePath))
    request = service.files().get_media(fileId=fileId)
    fh = io.FileIO(filePath, mode='wb')
    try:
        downloader = MediaIoBaseDownload(fh, request, chunksize=1024*1024)
        done = False
        while done is False:
            status, done = downloader.next_chunk(num_retries = 2)
            if status:
                print("Download %d%%." % int(status.progress() * 100))
        print("Download Complete!")
    finally:
        fh.close()