python - Getting boto.exception.S3ResponseError: S3ResponseError: 403 Forbidden when uploading file

Question

There are a few other questions on this issue:

boto.exception.S3ResponseError: S3ResponseError: 403 Forbidden

S3ResponseError: S3ResponseError: 403 Forbidden

S3ResponseError: 403 Forbidden using boto

Python: Amazon S3 cannot get the bucket: says 403 Forbidden

However, it seems I may be having a different problem (e.g., clock skew is not an issue and I already tried setting validate=False, and I believe I have the correct key and secret key because trying a bogus key or secret key gives me different errors). Here is my script:

import boto
import sys
from boto.s3.key import Key

BUCKET_NAME = sys.argv[1]
AWS_ACCESS_KEY_ID = sys.argv[2]
AWS_SECRET_ACCESS_KEY = sys.argv[3]

conn = boto.connect_s3(AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY)
bucket = conn.get_bucket(BUCKET_NAME, validate=False)
k = Key(bucket)
k.key = 'barbaz'
k.set_contents_from_filename('/tmp/barbaz.txt')

And the result:

Traceback (most recent call last):
  File "/home/jonderry/sdmain/src/scripts/jenkins/upload_to_s3.py", line 16, in <module>
    k.set_contents_from_filename('/tmp/barbaz.txt')
  File "/usr/local/lib/python2.7/dist-packages/boto/s3/key.py", line 1360, in set_contents_from_filename
    encrypt_key=encrypt_key)
  File "/usr/local/lib/python2.7/dist-packages/boto/s3/key.py", line 1291, in set_contents_from_file
    chunked_transfer=chunked_transfer, size=size)
  File "/usr/local/lib/python2.7/dist-packages/boto/s3/key.py", line 748, in send_file
    chunked_transfer=chunked_transfer, size=size)
  File "/usr/local/lib/python2.7/dist-packages/boto/s3/key.py", line 949, in _send_file_internal
    query_args=query_args
  File "/usr/local/lib/python2.7/dist-packages/boto/s3/connection.py", line 664, in make_request
    retry_handler=retry_handler
  File "/usr/local/lib/python2.7/dist-packages/boto/connection.py", line 1068, in make_request
    retry_handler=retry_handler)
  File "/usr/local/lib/python2.7/dist-packages/boto/connection.py", line 939, in _mexe
    request.body, request.headers)
  File "/usr/local/lib/python2.7/dist-packages/boto/s3/key.py", line 882, in sender
    response.status, response.reason, body)
boto.exception.S3ResponseError: S3ResponseError: 403 Forbidden
<?xml version="1.0" encoding="UTF-8"?>
<Error><Code>AccessDenied</Code><Message>Access Denied</Message><RequestId>***someRequestId***</RequestId><HostId>***someHostId</HostId></Error>

Any ideas what is the problem, or how to diagnose further?

Answer 1

This will also happen if your machine's time settings are incorrect