How to use with requests.post?

[jonhandlermac]

I may be brain dead, or just new at this, but how do you send a signed POST request?

Trying this:

class CredentialsProvider(object):

def __init__(self):
    self.creds = None
    self.sts = sts = boto3.client('sts')
    self.tz = get_localzone()
    self.session_num = 1

def auth(self):
    if not self.creds or datetime.now(self.tz) > self.creds['Expiration']:
        session_name = "sesh%d" % self.session_num
        self.session_num += 1
        self.creds = self.sts.assume_role(RoleArn='arn:aws:iam::XXXX:role/YYYYY', 
                                     RoleSessionName=session_name)['Credentials']
        self.auth = AWS4Auth(self.creds['AccessKeyId'],
                             self.creds['SecretAccessKey'],
                             'us-west-2', 'es',
                             session_token=self.creds['SessionToken'])
    return self.auth

...

    try:
        r = requests.post(url, data=json.JSONEncoder().encode(jsondata), auth=self.credentials_provider.auth())
    except Exception as e:
        print "HTTP exception for POST %s" % e

...

HTTP exception for POST call() takes exactly 2 arguments (1 given)

Works for get requests from the same host (python interactive) with
requests.get(endpoint, auth=awsauth)

I can't find any documentation on this either in the requests library or here.

[Tethik]

I'm also having issues trying to use this library with POST-requests. GET-requests work fine. It looks to me like the signatures might not be working properly for POST-requests, maybe because the payload is not signed? I get the following error.

{'message': 'The request signature we calculated does not match the signature you provided. Check your AWS Secret Access Key and signing method. Consult the service documentation for details.'}

Readme does say: GET URL parameter and POST parameter authentication are not supported..

[kjpgit]

For some reason, requests.put() works for me if using json=, but not data=.