django boto3：NoCredentialsError - 无法找到凭据

Question

I am trying to use boto3 in my django project to upload files to Amazon S3. Credentials are defined in settings.py :

AWS_ACCESS_KEY = xxxxxxxx
AWS_SECRET_KEY = xxxxxxxx
S3_BUCKET = xxxxxxx

In views.py :

import boto3

s3 = boto3.client('s3')
path = os.path.dirname(os.path.realpath(__file__))
s3.upload_file(path+'/myphoto.png', S3_BUCKET, 'myphoto.png')

The system complains about Unable to locate credentials . I have two questions:

(a) It seems that I am supposed to create a credential file ~/.aws/credentials . But in a django project, where do I have to put it?

(b) The s3 method upload_file takes a file path/name as its first argument. Is it possible that I provide a file stream obtained by a form input element <input type="file" name="fileToUpload"> ?

Answer 1

This is what I use for a direct upload, i hope it provides some assistance.

import boto
from boto.exception import S3CreateError
from boto.s3.connection import S3Connection

conn = S3Connection(settings.AWS_ACCESS_KEY,
                    settings.AWS_SECRET_KEY,
                    is_secure=True)
try:
    bucket = conn.create_bucket(settings.S3_BUCKET)
except S3CreateError as e:
    bucket = conn.get_bucket(settings.S3_BUCKET)

k = boto.s3.key.Key(bucket)
k.key = filename
k.set_contents_from_filename(filepath)

Not sure about (a) but django is very flexible with file management.

Regarding (b) you can also sign the upload and do it directly from the client to reduce bandwidth usage, its quite sneaky and secure too. You need to use some JavaScript to manage the upload. If you want details I can include them here.