AssertionError: Expected content-type to be application/json, got 'application/grpc'

Hi, everybody!

I have a simple Python script to create an archive and store it in Dropbox. 

 

import subprocess
import os
import dropbox
import shutil
from datetime import datetime

class DropboxUploader:
    def __init__(self, dropbox_token, CHUNK_SIZE):
        self.dropbox_token = dropbox_token
        self.CHUNK_SIZE = CHUNK_SIZE
        self.dbx = dropbox.Dropbox(dropbox_token)

    def upload(self, file_name, file_size):
        with open(f"{pwd}/{file_name}", 'rb') as f:
            upload_session_start_result = self.dbx.files_upload_session_start(f.read(self.CHUNK_SIZE))
            cursor = dropbox.files.UploadSessionCursor(session_id=upload_session_start_result.session_id, offset=f.tell())
            commit = dropbox.files.CommitInfo(path=f"{pwd}/{file_name}")

            while f.tell() < file_size:
                if ((file_size - f.tell()) <= self.CHUNK_SIZE):
                    self.dbx.files_upload_session_finish(f.read(self.CHUNK_SIZE), cursor, commit)
                else:
                    self.dbx.files_upload_session_append_v2(f.read(self.CHUNK_SIZE), cursor.session_id, cursor.offset)
                    cursor.offset = f.tell()

#Change those variables 
root_dir = '/home/user/site_name'
site = 'site'
database = 'database'
dropbox_token = 'xxxxxxxxxxxxxxx'

CHUNK_SIZE = 8 * 1024 * 1024  # 8MB
archive_name = site + '_' + datetime.now().strftime("%Y%m%d_%H%M%S")
database_dump_name = database + '_' + datetime.now().strftime("%Y%m%d_%H%M%S") + '.sql'
pwd = os.getcwd()

archive_path = shutil.make_archive(archive_name, 'tar', root_dir)
archive_name = os.path.basename(archive_path)

command = f"mysqldump -u root {database} > {database_dump_name}"
subprocess.run(command, shell=True)

archive_size = os.path.getsize(f"./{archive_name}")
database_dump_size = os.path.getsize(f"./{database_dump_name}")

# Only for file sizes less than 150 MB 
# dbx = dropbox.Dropbox(dropbox_token)
# with open(f"./{archive_name}.tar", 'rb') as f:
#     dbx.files_upload(f.read(), f"{pwd}/{archive_name}.tar")
# with open(f"./{database_dump_name}.sql", 'rb') as f:
#     dbx.files_upload(f.read(), f"{pwd}/{database_dump_name}.sql")

uploader = DropboxUploader(dropbox_token, CHUNK_SIZE)
uploader.upload(archive_name, archive_size)
uploader.upload(database_dump_name, database_dump_size)

 

 But there is an error:

 

Exception has occurred: AssertionError
Expected content-type to be application/json, got 'application/grpc'
  File "/home/user/dropbox/dropbox_backup.py", line 15, in upload
    upload_session_start_result = self.dbx.files_upload_session_start(f.read(self.CHUNK_SIZE))
  File "/home/user/dropbox/dropbox_backup.py", line 54, in <module>
    uploader.upload(archive_name, archive_size)
AssertionError: Expected content-type to be application/json, got 'application/grpc'

 

 
I saw this post Python upload big file example - Dropbox Community (dropboxforum.com) my code is practically the same, and I don't get why mine isn't working.