Merge pull request #125 from kremerpatrick/master

Added AWS Lambda support

Author: lamw

python/make_vcsp_2018.py

@@ -344,7 +344,7 @@ def make_vcsp(lib_name, lib_path, md5_enabled):
         json.dump(_make_items(items, lib_version), f, indent=2)
 
 
-def make_vcsp_s3(lib_name, lib_path, skip_cert):
+def make_vcsp_s3(lib_name, lib_path, skip_cert, aws_default_region = None):
     """
     lib_path is the library folder path on the bucket with pattern: [bucket-name]/[object-folder-path]
 
@@ -371,7 +371,10 @@ def make_vcsp_s3(lib_name, lib_path, skip_cert):
     lib_folder_path = paths[1]
 
     s3 = boto3.resource("s3")
-    s3_client = boto3.client('s3')
+    if aws_default_region is None:
+        s3_client = boto3.client('s3')
+    else:
+        s3_client = boto3.client('s3',region_name=aws_default_region)
 
     # check if the given s3 bucket exists
     try:

python/sample_lambda_function_for_make_vcsp_2018.py

@@ -0,0 +1,39 @@
+import json
+import make_vcsp_2018
+
+def lambda_handler(event, context):
+    buf = 'Lambda Content Library Handler. '
+    try:
+        buf = buf + "Event triggered by file: " + event["Records"][0]["s3"]["object"]["key"]
+    except:
+        print("No event key found.")
+        buf = buf + " No S3 event key found."
+        return {
+            'statusCode': 200,
+            'body': buf
+        }
+
+    # If we don't filter out .json files, this script keeps firing in a loop.
+    # We don't want the script to fire again when the script itself writes JSON files to the bucket.
+    # You could also solve this problem by using a suffix filter in the S3 trigger configuration,
+    # but you can only have one suffix per trigger. You would have to create a trigger for every
+    # possible filetype that might get uploaded to the bucket. 
+    filename = (event["Records"][0]["s3"]["object"]["key"]).lower()
+    if filename[-5:] == ".json":
+        filter_status = "filtered"
+    else:
+        # Example usage: make_vcsp_2018.make_vcsp_s3('my-library','library-bucket/lib1',False,'us-east-2')
+        # Argument description:
+        # my-library - name of the library, 
+        # library-bucket/lib1 -  S3 bucket name and folder name
+        # false - Flag configured not to skip SSL validation
+        # us-east-2 - default region
+        # We pass the default region directly to the boto library so we don't have to configure environment variables in Lambda
+        make_vcsp_2018.make_vcsp_s3('REPLACE-ME','REPLACE-ME',False,'REPLACE-ME')
+        filter_status = "unfiltered"
+    
+    return {
+        'statusCode': 200,
+        'body': buf,
+        'filterStatus': filter_status
+    }