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dataclasss for parsing aws objects eg api-gateway proxy integration proy

Project description

AWS_SCHEMA

dataclass for aws dictionaries

This library aims to parse aws dictionaries and json strings into dataclass objects

Install

pip install awsSchema

How to use

extract data from aws classes eg apigateway lambda input/output this library uses jsondataclass, and dataclass

API Gateway integration

from awsSchema.apigateway import Response, Event

parsing event

dummyEvent =  { "resource": "/{proxy+}", "path": "/hello/world", "httpMethod": "POST", "headers": { "Accept": "*/*", "Accept-Encoding": "gzip, deflate", "cache-control": "no-cache", "CloudFront-Forwarded-Proto": "https", "CloudFront-Is-Desktop-Viewer": "true", "CloudFront-Is-Mobile-Viewer": "False", "CloudFront-Is-SmartTV-Viewer": "False", "CloudFront-Is-Tablet-Viewer": "False", "CloudFront-Viewer-Country": "US", "Content-Type": "application/json", "headerName": "headerValue", "Host": "gy415nuibc.execute-api.us-east-1.amazonaws.com", "Postman-Token": "9f583ef0-ed83-4a38-aef3-eb9ce3f7a57f", "User-Agent": "PostmanRuntime/2.4.5", "Via": "1.1 d98420743a69852491bbdea73f7680bd.cloudfront.net (CloudFront)", "X-Amz-Cf-Id": "pn-PWIJc6thYnZm5P0NMgOUglL1DYtl0gdeJky8tqsg8iS_sgsKD1A==", "X-Forwarded-For": "54.240.196.186, 54.182.214.83", "X-Forwarded-Port": "443", "X-Forwarded-Proto": "https" }, "multiValueHeaders":{ 'Accept':[ "*/*" ], 'Accept-Encoding':[ "gzip, deflate" ], 'cache-control':[ "no-cache" ], 'CloudFront-Forwarded-Proto':[ "https" ], 'CloudFront-Is-Desktop-Viewer':[ "true" ], 'CloudFront-Is-Mobile-Viewer':[ "False" ], 'CloudFront-Is-SmartTV-Viewer':[ "False" ], 'CloudFront-Is-Tablet-Viewer':[ "False" ], 'CloudFront-Viewer-Country':[ "US" ], '':[ "" ], 'Content-Type':[ "application/json" ], 'headerName':[ "headerValue" ], 'Host':[ "gy415nuibc.execute-api.us-east-1.amazonaws.com" ], 'Postman-Token':[ "9f583ef0-ed83-4a38-aef3-eb9ce3f7a57f" ], 'User-Agent':[ "PostmanRuntime/2.4.5" ], 'Via':[ "1.1 d98420743a69852491bbdea73f7680bd.cloudfront.net (CloudFront)" ], 'X-Amz-Cf-Id':[ "pn-PWIJc6thYnZm5P0NMgOUglL1DYtl0gdeJky8tqsg8iS_sgsKD1A==" ], 'X-Forwarded-For':[ "54.240.196.186, 54.182.214.83" ], 'X-Forwarded-Port':[ "443" ], 'X-Forwarded-Proto':[ "https" ] }, "queryStringParameters": { "name": "me", "multivalueName": "me" }, "multiValueQueryStringParameters":{ "name":[ "me" ], "multivalueName":[ "you", "me" ] }, "pathParameters": { "proxy": "hello/world" }, "stageVariables": { "stageVariableName": "stageVariableValue" }, "requestContext": { "accountId": "12345678912", "resourceId": "roq9wj", "stage": "testStage", "requestId": "deef4878-7910-11e6-8f14-25afc3e9ae33", "identity": { "cognitoIdentityPoolId": None, "accountId": None, "cognitoIdentityId": None, "caller": None, "apiKey": None, "sourceIp": "192.168.196.186", "cognitoAuthenticationType": None, "cognitoAuthenticationProvider": None, "userArn": None, "userAgent": "PostmanRuntime/2.4.5", "user": None }, "resourcePath": "/{proxy+}", "httpMethod": "POST", "apiId": "gy415nuibc" }, "body": "{\r\n\t\"a\": 1\r\n}", "isBase64Encoded": False }
event = Event.from_dict(dummyEvent)
type(event)
awsSchema.apigateway.Event

parsing for body

Event.parseBody(dummyEvent)
{'a': 1}

creating response for apiGateway

print(Response.returnSuccess(body={'hello':'world'}))
print(Response.returnError(message='error'))
{'body': '{"hello":"world"}', 'statusCode': 200, 'headers': {}}
{'body': '{"error":"error"}', 'statusCode': 400, 'headers': {}}

Use in lambda function

def lambda_handler(event, *args):
  # parsing event body
  body = Event.parseBody(event)


  # submitting output
  return Response.returnSuccess(body = {'success':'true'})

lambda_handler(dummyEvent)
{'body': '{"success":"true"}', 'statusCode': 200, 'headers': {}}

getting around lambda proxy integration for sdk

#trigger lambda
inputBody = {'test':'123'}

inputToFunction = Event.getInput(body = inputBody) ; print(f'inputToFunction is {inputToFunction}')
response = lambda_handler(inputToFunction); print(f'rawResponse is {response}')
parsedResponse = Response.parseBody(response); print(f'parsedResponse is {parsedResponse}')
inputToFunction is {'body': '{"test":"123"}', 'headers': {}, 'statusCode': 200}
rawResponse is {'body': '{"success":"true"}', 'statusCode': 200, 'headers': {}}
parsedResponse is {'success': 'true'}

S3

from awsSchema.S3 import S3Event
# test get key object
eventSample = { "Records": [ { "eventVersion": "2.1", "eventSource": "aws:s3", "awsRegion": "us-east-2", "eventTime": "2019-09-03T19:37:27.192Z", "eventName": "ObjectCreated:Put", "userIdentity": { "principalId": "AWS:AIDAINPONIXQXHT3IKHL2" }, "requestParameters": { "sourceIPAddress": "205.255.255.255" }, "responseElements": { "x-amz-request-id": "D82B88E5F771F645", "x-amz-id-2": "vlR7PnpV2Ce81l0PRw6jlUpck7Jo5ZsQjryTjKlc5aLWGVHPZLj5NeC6qMa0emYBDXOo6QBU0Wo=" }, "s3": { "s3SchemaVersion": "1.0", "configurationId": "828aa6fc-f7b5-4305-8584-487c791949c1", "bucket": { "name": "bucketname", "ownerIdentity": { "principalId": "A3I5XTEXAMAI3E" }, "arn": "arn:aws:s3:::lambda-artifacts-eafc19498e3f2df" }, "object": { "key": "theKey", "size": 1305107, "eTag": "b21b84d653bb07b05b1e6b33684dc11b", "sequencer": "0C0F6F405D6ED209E1" } } } ] }
bucket, key = S3Event.getKeyObject(eventSample)
print(bucket,key)

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