Python - Automatic Refresh_token Using oauth-2.0 with offlineaccess

OK I now: the automatic token refreshing is not a new topic. 

This is the use case that generate my problem: let's say that we want extract data from Dropbox. Below you can find the code: for the first time works perfectly: in fact 1) the user goes to the generated link; 2) after allow the app coping and pasting the authorization code in the input box.

The problem arise when some hours after the user wants to do the same operation. How to avoid or by-pass the newly generation of authorization code and go straight to the operation?

As you can see in the code in a short period is possible reinject the auth code inside the code (commented in the code). But after 1 hour or more this is not loger possible.

Any help is welcome.

 

 

#!/usr/bin/env python3

import dropbox
from dropbox import DropboxOAuth2FlowNoRedirect

'''
Populate your app key in order to run this locally
'''
APP_KEY = ""

auth_flow = DropboxOAuth2FlowNoRedirect(APP_KEY, use_pkce=True, token_access_type='offline')

target='/DVR/DVR/'

authorize_url = auth_flow.start()
print("1. Go to: " + authorize_url)
print("2. Click \"Allow\" (you might have to log in first).")
print("3. Copy the authorization code.")
auth_code = input("Enter the authorization code here: ").strip()
# auth_code="3NIcPps_UxAAAAAAAAAEin1sp5jUjrErQ6787_RUbJU"

try:
    oauth_result = auth_flow.finish(auth_code)
except Exception as e:
    print('Error: %s' % (e,))
    exit(1)

with dropbox.Dropbox(oauth2_refresh_token=oauth_result.refresh_token, app_key=APP_KEY) as dbx:
    dbx.users_get_current_account()
    print("Successfully set up client!")
   
      
    for entry in dbx.files_list_folder(target).entries:
        print(entry.name)
    def dropbox_list_files(path):
        try:
            files = dbx.files_list_folder(path).entries
            files_list = []
            for file in files:
                if isinstance(file, dropbox.files.FileMetadata):
                    metadata = {
                        'name': file.name,
                        'path_display': file.path_display,
                        'client_modified': file.client_modified,
                        'server_modified': file.server_modified
                    }
                    files_list.append(metadata)

            df = pd.DataFrame.from_records(files_list)
            return df.sort_values(by='server_modified', ascending=False)

        except Exception as e:
            print('Error getting list of files from Dropbox: ' + str(e))

    # function to get the list of files in a folder
    def create_links(target, csvfile):
        filesList = []
        print("creating links for folder " + target)
        files = dbx.files_list_folder('/'+target)
        filesList.extend(files.entries)
        print(len(files.entries))

        while(files.has_more == True) :
            files = dbx.files_list_folder_continue(files.cursor)
            filesList.extend(files.entries)
            print(len(files.entries))

        for file in filesList :
            if (isinstance(file, dropbox.files.FileMetadata)) :
                filename = file.name + ',' + file.path_display + ',' + str(file.size) + ','
                link_data = dbx.sharing_create_shared_link(file.path_lower)
                filename += link_data.url + '\n'
                csvfile.write(filename)
                print(file.name)

            else :
                create_links(target+'/'+file.name, csvfile)

    # create links for all files in the folder belgeler 
    create_links(target, open('links.csv', 'w', encoding='utf-8'))

listing = dbx.files_list_folder(target)
# todo: add implementation for files_list_folder_continue

for entry in listing.entries:
    if entry.name.endswith(".pdf"):
        # note: this simple implementation only works for files in the root of the folder
        res = dbx.sharing_get_shared_links(
           target + entry.name)
          
        # f.write(res.content)
    
        print('\r', res)