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

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

homopoluza
Helpful | Level 6

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. 

1 Accepted Solution

Accepted Solutions

homopoluza
Helpful | Level 6

I just renewed the token, and all is good. Thank you for your time Greg-DB

View solution in original post

6 Replies 6

Greg-DB
Dropbox Staff

Thanks for the report! This error indicates that the Dropbox API servers did not respond with the expected format.

 

I just tried this out myself though, and I wasn't able to reproduce this. This kind of issue could just be a result of temporary server issues. Are you still seeing this problem?

 

If you are still seeing this, please let me know:

  • about what percent of your calls fail like this
  • if this code was previously working for you, and if so, when you saw this problem start occurring
  • whether or not other calls, such as `self.dbx.users_get_current_account()` also fail like this for you

homopoluza
Helpful | Level 6

Sorry for the late reply.

  • about what percent of your calls fail like this
    All of them
  • if this code was previously working for you, and if so, when you saw this problem start occurring
    No, this is a new script for me, I wrote it with the help of this post
     https://www.dropboxforum.com/t5/Dropbox-API-Support-Feedback/python-upload-big-file-example/td-p/166...
    It worked for others without problems.
  • whether or not other calls, such as `self.dbx.users_get_current_account()` also fail like this for you
    Unfortunately yes. The token was provided to me by my colleague. Could it be restrictions of trial account perhaps?
    print(dbx.users_get_current_account()) AssertionError: Expected content-type to be application/json, got 'application/grpc'

    Thank you for your assistance 

Greg-DB
Dropbox Staff

Thanks for following up. The API functionality you're attempting to use is available to all Dropbox plans/trials, and even if an API error is returned, it shouldn't be sent with that Content-Type.

 

It's unclear what would be causing this, so we'll need to look into this further. Can you please try running the following at least 5 times and send me the output? This will enable more verbose output which may be helpful for investigating this issue:

import http.client
http.client.HTTPConnection.debuglevel = 1

import dropbox
dbx = dropbox.Dropbox('ACCESS_TOKEN_HERE')
print(dbx.users_get_current_account())

 

Be sure to replace ACCESS_TOKEN_HERE with the access token you're using. As long as that access token starts with "sl." and it has been more than four hours since the access token has been created, please leave it in the output as it would be expired anyway and may be helpful for investigating this.

homopoluza
Helpful | Level 6

after multiple times

the output

bazhin@DESKTOP-2IOFFID:~/dropbox$  /usr/bin/env /bin/python3 /home/bazhin/.vscode-server/extensions/ms-python.debugpy-2024.4.0-linux-x64/bundled/libs/debugpy/adapter/../../debugpy/launcher 42309 -- /home/bazhin/dropbox/test2.py 
send: b'POST /2/users/get_current_account HTTP/1.1\r\nHost: api.dropboxapi.com\r\nUser-Agent: OfficialDropboxPythonSDKv2/11.36.2\r\nAccept-Encoding: gzip, deflate\r\nAccept: */*\r\nConnection: keep-alive\r\nAuthorization: Bearer sl.BznBUIsodC4OmcMX9vn7wX6TOTMiFbTfTF7preTpNpCWTwG_hwF3p30YXdak\xadKcgIDP5CggtIwJ1ScpQWlPNfVggJQLY2uIEPAQdLTFyVvsSnF_mIN8Ji52N1\xadXkQljr3_5RiJPNPVFEwq\r\nContent-Type: application/json\r\nContent-Length: 4\r\n\r\n'
send: b'null'
reply: 'HTTP/1.1 401 Unauthorized\r\n'
header: Content-Type: application/grpc
header: Date: Tue, 23 Apr 2024 05:59:06 GMT
header: Server: envoy
header: Content-Length: 0
header: X-Dropbox-Response-Origin: far_remote
header: X-Dropbox-Request-Id: 05ae29d6341d48268d19838cbfda16d5

the error

Exception has occurred: AssertionError
Expected content-type to be application/json, got 'application/grpc'
  File "/home/bazhin/dropbox/test2.py", line 6, in <module>
    print(dbx.users_get_current_account())
AssertionError: Expected content-type to be application/json, got 'application/grpc'

 

homopoluza
Helpful | Level 6

Well, I decided to create my own app for testing on my own current account.

Permission type - account_info.read - Scoped App

And 

 

print(dbx.users_get_current_account())

 

works just fine now. 

Then I added files.content.write permission and tried my script from the first post and got

 

Exception has occurred: AuthError
AuthError('1c1aa051ebc4408297c28154348ecaf8', AuthError('missing_scope', TokenScopeError(required_scope='files.content.write')))
  File "/home/bazhin/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/bazhin/dropbox/dropbox_backup.py", line 54, in <module>
    uploader.upload(archive_name, archive_size)
dropbox.exceptions.AuthError: AuthError('1c1aa051ebc4408297c28154348ecaf8', AuthError('missing_scope', TokenScopeError(required_scope='files.content.write')))

 

But I guess I have to wait for permission update or something, haven't I? 




homopoluza
Helpful | Level 6

I just renewed the token, and all is good. Thank you for your time Greg-DB

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    homopoluza Helpful | Level 6
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