add s3-public-download.py

s3-public-download.py

+#!/usr/bin/python3
+
+import os
+import logging
+import boto3
+
+
+radosgw_access_key = os.environ['AWS_ACCESS_KEY_ID']
+radosgw_secret_key = os.environ['AWS_SECRET_ACCESS_KEY']
+radosgw_endpoint_url = 'https://rise-s3.zib.de'
+
+radosgw_bucket_name = 'k8s-doc-bucket'
+radosgw_key_name = 'Using_Kubernetes_Secrets.pdf'
+radosgw_file_name = 'talk.pdf'
+
+
+# generate s3 client
+s3_client = boto3.client('s3',
+                    endpoint_url=radosgw_endpoint_url,
+                    aws_access_key_id=radosgw_access_key,
+                    aws_secret_access_key=radosgw_secret_key
+)
+
+################################################################################
+# check if bucket exists
+bucket_exists = False
+
+# Retrieve the list of existing buckets
+response = s3_client.list_buckets()
+
+for bucket in response['Buckets']:
+    bucket_name = bucket["Name"]
+    if (bucket_name == radosgw_bucket_name):
+        bucket_exists = True
+
+# create bucket if not found
+if bucket_exists == False:
+    print(f"creating bucket '{radosgw_bucket_name}' …")
+    response = s3_client.create_bucket(Bucket=radosgw_bucket_name, ACL='public-read')
+
+# upload file
+response = s3_client.upload_file(
+    radosgw_file_name, radosgw_bucket_name, radosgw_key_name,
+    ExtraArgs={'ACL': 'public-read'}
+)
+
+print(f"uploaded file to '{radosgw_endpoint_url}/{radosgw_bucket_name}/{radosgw_key_name}'.")