initial version of counter lambda function

4 years ago · a22eb50b9d
4 changed files with 171 additions and 0 deletions
--- a/example-projects/counter-demo/aws-lambda/invoke-function.py
+++ b/example-projects/counter-demo/aws-lambda/invoke-function.py
@ -0,0 +1,41 @@
+import boto3
+import json
+
+################################################################################################
+#
+# Configuration Parameters
+#
+################################################################################################
+
+region = 'eu-central-1'
+functionName = 'cloudcomp-counter-lambda-demo'
+
+
+################################################################################################
+#
+# boto3 code
+#
+################################################################################################
+
+
+client = boto3.setup_default_session(region_name=region)
+lClient = boto3.client('lambda')
+
+
+print("Invoking function...")
+print("------------------------------------")
+try:
+    response = lClient.invoke(
+        FunctionName=functionName,
+        Payload='{ "input": "1" }'
+    )
+except lClient.exceptions.ResourceNotFoundException:
+    print('Function not available. No need to delete it.')
+
+streamingBody = response['Payload']
+result = streamingBody.read()
+
+print(json.dumps(response, indent=4, sort_keys=True, default=str))
+
+print('Payload:\n' + str(result))
+
--- a/example-projects/counter-demo/aws-lambda/lambda_function.py
+++ b/example-projects/counter-demo/aws-lambda/lambda_function.py
@ -0,0 +1,42 @@
+# import json
+import base64
+import boto3
+
+
+def lambda_handler(event, context):
+    s3_client = boto3.client('s3')
+    response = s3_client.get_object(Bucket='vertsys-counter', Key='eu-central-1')
+
+    counter = int(response['Body'].read().decode('utf-8'))
+
+    debug = ""
+    incr = 0
+    if 'body' in event:
+        body = str(base64.b64decode(event['body']).decode("utf-8"))
+        if body.startswith('input'):
+            incr = int(body.rsplit('=')[1])
+    elif 'input' in event:
+        incr = int(event['input'])
+
+    if incr is not 0:
+        counter = counter + incr
+        response = s3_client.put_object(Bucket='vertsys-counter', Key='eu-central-1', Body=str(counter))
+
+    output = ('<html><head><title>TCPTimeCounter REST Service</title>\n'
+              '<meta http-equiv="refresh" content="5"/></head><body>\n'
+              '<h2>HS Fulda - TCPTimeCounter REST Service</h2>\n'
+              '<p><b>HTML-Output:</b> ' + str(counter) + '</p></body>\n'
+              '<form method=POST action="/default/cloudcomp-counter-demo">\n'
+              '<input type="hidden" name="input" value="1">\n'
+              '<input type="submit" value="Increment"></form>\n'
+              # '<hr><b>Lambda Event:</b><br>' + repr(event) + '\n'
+              # '<hr><b>Lambda Context:</b><br>' + repr(context) + '\n'
+              '</body></html>\n')
+
+    return {
+        'statusCode': 200,
+        'headers': {
+            'Content-Type': 'text/html',
+        },
+        'body': output
+    }
--- a/example-projects/counter-demo/aws-lambda/start.py
+++ b/example-projects/counter-demo/aws-lambda/start.py
@ -0,0 +1,55 @@
+import boto3
+import zipfile
+
+################################################################################################
+#
+# Configuration Parameters
+#
+################################################################################################
+
+region = 'eu-central-1'
+functionName = 'cloudcomp-counter-lambda-demo'
+roleName = 'arn:aws:iam::309000625112:role/service-role/cloudcomp-counter-demo-role-6rs7pah3'
+
+
+################################################################################################
+#
+# boto3 code
+#
+################################################################################################
+
+
+client = boto3.setup_default_session(region_name=region)
+lClient = boto3.client('lambda')
+
+
+print("Deleting old function...")
+print("------------------------------------")
+try:
+    response = lClient.delete_function(
+        FunctionName=functionName,
+    )
+except lClient.exceptions.ResourceNotFoundException:
+    print('Function not available. No need to delete it.')
+
+
+print("creating new function...")
+print("------------------------------------")
+
+zf = zipfile.ZipFile('lambda-deployment-archive.zip', 'w', zipfile.ZIP_DEFLATED)
+zf.write('lambda_function.py')
+zf.close()
+
+with open('lambda-deployment-archive.zip', mode='rb') as file:
+    zipfileContent = file.read()
+
+    response = lClient.create_function(
+        FunctionName=functionName,
+        Runtime='python3.8',
+        Role=roleName,
+        Code={
+            'ZipFile': zipfileContent
+        },
+        Handler='lambda_function.lambda_handler',
+        Publish=True,
+    )
--- a/example-projects/counter-demo/aws-lambda/stop.py
+++ b/example-projects/counter-demo/aws-lambda/stop.py
@ -0,0 +1,33 @@
+import boto3
+import zipfile
+
+################################################################################################
+#
+# Configuration Parameters
+#
+################################################################################################
+
+region = 'eu-central-1'
+functionName = 'cloudcomp-counter-lambda-demo'
+roleName = 'arn:aws:iam::309000625112:role/service-role/cloudcomp-counter-demo-role-6rs7pah3'
+
+
+################################################################################################
+#
+# boto3 code
+#
+################################################################################################
+
+
+client = boto3.setup_default_session(region_name=region)
+lClient = boto3.client('lambda')
+
+
+print("Deleting old function...")
+print("------------------------------------")
+try:
+    response = lClient.delete_function(
+        FunctionName=functionName,
+    )
+except lClient.exceptions.ResourceNotFoundException:
+    print('Function not available. No need to delete it.')