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initial version of counter lambda function

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Sebastian Rieger
2020-06-14 15:52:26 +02:00
parent 33ab50e291
commit a22eb50b9d
4 changed files with 171 additions and 0 deletions
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41
example-projects/counter-demo/aws-lambda/invoke-function.py Normal file
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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))

42
example-projects/counter-demo/aws-lambda/lambda_function.py Normal file
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# 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
}

55
example-projects/counter-demo/aws-lambda/start.py Normal file
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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,
)

33
example-projects/counter-demo/aws-lambda/stop.py Normal file
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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.')