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Author: alfonsof

awslambdalist-capi/README.md

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+# AWS Lambda Function List Python example
+
+This folder contains an AWS Lambda Function example in Python on AWS (Amazon Web Services).
+
+List information of a Lambda function using the Client API (low-level) of Boto 3.
+
+## Requirements
+
+* You must have an [Amazon Web Services (AWS)](http://aws.amazon.com/) account.
+
+* The code was written for Python 3 and AWS SDK for Python (Boto3).
+
+* This example uses Client API (low-level) of Boto 3.
+
+* Install the AWS SDK for Python (Boto3).
+
+ Install the latest Boto 3 release via pip:
+
+ ```bash
+ pip install boto3
+ ```
+
+## Using the code
+
+* Configure your AWS access keys.
+
+ **Important:** For security, it is strongly recommend that you use IAM users instead of the root account for AWS access.
+
+ When you initialize a new service client without supplying any arguments, the AWS SDK for Java attempts to find AWS credentials by using the default credential provider chain.
+
+ Setting your credentials for use by the AWS SDK for Java can be done in a number of ways, but here are the recommended approaches:
+
+ * The default credential profiles file
+ 
+ Set credentials in the AWS credentials profile file on your local system, located at:
+
+ `~/.aws/credentials` on Linux, macOS, or Unix
+
+ `C:\Users\USERNAME\.aws\credentials` on Windows
+
+ This file should contain lines in the following format:
+
+ ```bash
+ [default]
+ aws_access_key_id = <your_access_key_id>
+ aws_secret_access_key = <your_secret_access_key>
+ ```
+ Substitute your own AWS credentials values for the values `<your_access_key_id>` and `<your_secret_access_key>`.
+
+ * Environment variables `AWS_ACCESS_KEY_ID` and `AWS_SECRET_ACCESS_KEY`
+ 
+ Set the `AWS_ACCESS_KEY_ID` and `AWS_SECRET_ACCESS_KEY` environment variables.
+
+ To set these variables on Linux, macOS, or Unix, use `export`:
+
+ ```bash
+ export AWS_ACCESS_KEY_ID=<your_access_key_id>
+ export AWS_SECRET_ACCESS_KEY=<your_secret_access_key>
+ ```
+
+ To set these variables on Windows, use `set`:
+
+ ```bash
+ set AWS_ACCESS_KEY_ID=<your_access_key_id>
+ set AWS_SECRET_ACCESS_KEY=<your_secret_access_key>
+ ```
+
+* You can create a Lambda function on AWS.
+
+ You can use the AWS Lambda Function Hello World JSON Java example: [awslambdahellojson](/awslambdahellojson).
+
+* You can select the bucket region changing the value of `REGION` variable in the code.
+
+* Run the code.
+
+ You must provide 1 parameter:
+ 
+ * `<FUNCTION_NAME>` = Lambda function name
+
+ Run application:
+
+ ```bash
+ python lambdalist.py function-name
+ ```
+
+ You can use as Lambda function name 2 options:
+ 
+ * Function name
+ 
+ Ex.: `HelloJsonPython`
+
+ * ARN value
+ 
+ Ex.: `arn:aws:lambda:eu-west-1:123456789012:function:HelloJsonPython`
+ 
+ You can retrieve the ARN value by looking at the function in the AWS Console.
+
+* Test the application.
+
+ You should see the response with the information of the Lambda function.

awslambdalist-capi/lambdalist.py

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+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+# lambdalist.py
+# It is an example that handles Lambda functions on AWS.
+# It uses Client API (low-level) of Boto3.
+# List information of a Lambda function.
+# You must provide 1 parameter:
+# FUNCTION_NAME = Lambda function name
+
+import sys
+import boto3
+import botocore
+
+def main():
+
+ REGION = 'eu-west-1' # AWS region
+
+ # Make a list of command line arguments, omitting the [0] element
+ # which is the script itself.
+ args = sys.argv[1:]
+ if len(args) < 1:
+ print('Not enough parameters.\nProper Usage is: python lambdalist.py <FUNCTION_NAME>')
+ sys.exit(1)
+
+ function_name = args[0]
+ print('Lambda function name: ' + function_name)
+
+ # Create an S3 Client
+ lambdaclient = boto3.client('lambda', region_name=REGION)
+
+ # Invoke lambda function
+ try:
+ print('Listing function ...')
+
+ config = lambdaclient.get_function_configuration(
+ FunctionName=function_name
+ )
+
+ print('Function name: ', config['FunctionName'])
+ print(' - ARN: ', config['FunctionArn'])
+ print(' - Runtime: ', config['Runtime'])
+ print(' - Role: ', config['Role'])
+ print(' - Handler: ', config['Handler'])
+ print(' - Description: ', config['Description'])
+ print(' - Timeout: ', config['Timeout'])
+ print(' - MemorySize: ', config['MemorySize'])
+ print(' - LastModified: ', config['LastModified'])
+ print(' - Description: ', config['Description'])
+ print(' - CodeSize: ', config['CodeSize'])
+ print(' - Version: ', config['Version'])
+
+ except botocore.exceptions.ClientError as e:
+ if e.response['Error']['Code'] == "ResourceNotFoundException":
+ print("Error: Function Not Found!!")
+ elif e.response['Error']['Code'] == "AccessDeniedException":
+ print("Error: Access Denied!!")
+ elif e.response['Error']['Code'] == "ValidationException":
+ print("Error: Name Not Valid!!")
+ else:
+ raise
+
+ return
+
+
+# This is the standard boilerplate that calls the main() function.
+if __name__ == '__main__':
+ main()