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AWSTemplateFormatVersion: "2010-09-09"
Transform: AWS::Serverless-2016-10-31

Globals:
  Function:
    Timeout: 60

Parameters:
  Stage:
    Type: String

aquiseb

AWSTemplateFormatVersion: '2010-09-09'

Description: AWS API Gateway with a Lambda Integration

Parameters:
  lambdaFunctionName:
    Type: "String"
    AllowedPattern: "^[a-zA-Z0-9]+[a-zA-Z0-9-]+[a-zA-Z0-9]+$"
    Description: Lambda function name. (Recommend to keep default)
    Default: "lambda-api"

aquiseb

Troubleshooting AWS unauthorized errors in lambda requests

This is mainly for node.js but might apply to other environments. Unsure.

If you are running a AWS Lambda function that calls another AWS service and getting an error about invalid tokens or other access denied errors, do this:

Check IAM

The role assigned to your lambda function will need permission to perform the actions. Check IAM and make sure the role has all the permissions.

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Description: Web Application lambdas
Transform: AWS::Serverless-2016-10-31
AWSTemplateFormatVersion: '2010-09-09'
Parameters:
  Version:
    Description: Version of this template
    Type: String
  EnvName:
    Description: An environment name that is prefixed to resource names
    Type: String

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CloudFormation example for API Gateway integration to Lambda function

Template that will create the following:

• API Gateway endpoint:
  • A single root method, accepting POST requests only with Lambda proxy integration to a function.
• In-line Lambda function echoing back requesting users IP address to API Gateway requests:
  • IAM role for Lambda allowing CloudWatch logs access.
  • Permissions for Lambda that allow API Gateway endpoint to successfully invoke function.
• CloudWatch logs group for Lambda, with 90 day log retention.

After standing up the template, you should be able to curl a POST request to the URL listed as the apiGatewayInvokeURL output value.

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module.exports.handler = async (event) => {
    console.log(JSON.stringify(event, 2));
    return { 
      statusCode: 200,
      body: "Echoing your message: " + event.echo 
    }
};

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  # The top-level websocket itself
  NATPunchWebSocket:
    Type: AWS::ApiGatewayV2::Api
    Properties:
      Name: NATPunchWebSocket
      ProtocolType: WEBSOCKET
      RouteSelectionExpression: "$request.body.action"

  # The builtin $connect path. This involves both a route
  # definition and its integration definition, which follows, as well as a 

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Resources:
  ZachLambdaRole:
    Type: AWS::IAM::Role
    Properties:
      Description: Lambda execution role for Zach
      AssumeRolePolicyDocument:
        Version: 2012-10-17
        Statement:
          - Effect: Allow
            Principal:

aquiseb

package crypto

import (
	"crypto/sha256"
)

// NewSHA256 ...
func NewSHA256(data []byte) []byte {
	hash := sha256.Sum256(data)
	return hash[:]