Getting s3 connection uri for airflow

s3baby.py

import json
from airflow.models.connection import Connection

c = Connection(
    conn_id='s3conn',
    conn_type='s3',
    extra=json.dumps({"host":"http://hostname/", "aws_access_key_id":"id", "aws_secret_access_key": "secret"}),
)

c.get_uri()

>>> 's3://?host=http%3A%2F%2Fhostname%2F&aws_access_key_id=id&aws_secret_access_key=secret'