Create upload session for existing file

post
https://upload.box.com/api/2.0
/files/:file_id/upload_sessions

Creates an upload session for an existing file.

Request

application/json

Path Parameters

stringin pathrequired
12345

The unique identifier that represent a file.

The ID for any file can be determined by visiting a file in the web application and copying the ID from the URL. For example, for the url https://*.app.box.com/files/123 the file_id is 123.

Request Body

stringin bodyoptional
Project.mov

The optional new name of new file

integer / int64in bodyrequired
104857600

The total number of bytes of the file to be uploaded

Response

application/jsonUpload Session

Returns a new upload session.

application/jsonClient Error

Returns an error if the file already exists, or the account has run out of disk space.

You can now try out some of our APIs live, right here in the documentation.
Log In

Request Example

cURL
curl -X POST https://upload.box.com/api/2.0/files/12345/upload_sessions \
     -H "Authorization: Bearer <ACCESS_TOKEN>" \
     -H "Content-Type: application/json" \
     -d '{
       "file_size": 104857600
     }'
Python
file_size = 26000000
upload_session = client.file('11111').create_upload_session(file_size)
print('Created upload session {0} with chunk size of {1} bytes'.format(upload_session.id, upload_session.part_size))

Response Example

{
  "id": "F971964745A5CD0C001BBE4E58196BFD",
  "type": "upload_session",
  "session_expires_at": "2012-12-12T10:53:43-08:00",
  "part_size": 1024,
  "total_parts": 1000,
  "num_parts_processed": 455,
  "session_endpoints": {
    "upload_part": "https://upload.box.com/api/2.0/files/upload_sessions/F971964745A5CD0C001BBE4E58196BFD",
    "commit": "https://upload.box.com/api/2.0/files/upload_sessions/F971964745A5CD0C001BBE4E58196BFD/commit",
    "abort": "https://upload.box.com/api/2.0/files/upload_sessions/F971964745A5CD0C001BBE4E58196BFD",
    "list_parts": "https://upload.box.com/api/2.0/files/upload_sessions/F971964745A5CD0C001BBE4E58196BFD/parts",
    "status": "https://upload.box.com/api/2.0/files/upload_sessions/F971964745A5CD0C001BBE4E58196BFD",
    "log_event": "https://upload.box.com/api/2.0/files/upload_sessions/F971964745A5CD0C001BBE4E58196BFD/log"
  }
}