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goldwasher-aws-lambda

v1.0.3

Published

A version of goldwasher that runs as a module on AWS Lambda.

Downloads

11

Readme

node-goldwasher-aws-lambda

npm version Build Status Coverage Status Code Climate

Dependency Status devDependency Status peerDependency Status

A version of goldwasher that runs as a module on AWS Lambda. Uses goldwasher-needle for requests.

Installation

This module installs as a module on AWS Lambda, as a zip file. You can either just download the zip from /dist and upload it via your AWS console or install it via aws-cli. The first one might not always work so the method with aws-cli described below is recommended:

npm install goldwasher-aws-lambda
cd node_modules/goldwasher-aws-lambda/dist/
aws lambda create-function --function-name goldwasher --timeout 60 --zip-file fileb://goldwasher-aws-lambda.zip

You can of course replace goldwasher with your name of choice and 60 with a lower timeout if necessary.

If you later need to overwrite it and the function name already exists on AWS, use this instead:

aws lambda update-function-code --function-name goldwasher --zip-file fileb://goldwasher-aws-lambda.zip

Options

The module accepts the usual parameters of goldwasher-needle with the exception that the url and options parameters have been merged. This simply means that the first parameter, url, has been removed and must instead be added as a property on the options parameter:

{
  url: 'http://github.com',
  goldwasher: {
    selector: 'h1'
  }
}

See how to use this in the examples below or simply paste it as a sample event in the AWS console.

Build

If you feel like changing the code and have installed the development dependencies, you can automatically build a new zip file from the main folder:

gulp zip

This will create a new zip that can be installed with the commands mentioned under installation.

Example

In this example we will show how to consume the Lambda function from a client. First, install the aws-sdk:

npm install aws-sdk

In this example, we will use a config file for our AWS credentials. Remember to replace the values below with your own.

IMPORTANT:

It is extremely important that you do not push this file to your git repository or any other public place. I highly recommend using environment variables instead. I also recommend creating a user on AWS that only has the permission AWSLambdaRole to run this.

aws-config.json:

{ 
	"accessKeyId": "akid",
	"secretAccessKey": "secret",
	"region": "us-east-1"
}

example.js:

var AWS = require('aws-sdk');

AWS.config.loadFromPath('./aws-config.json');

var lambda = new AWS.Lambda();

lambda.invoke({
	FunctionName: 'goldwasher',
	Payload: JSON.stringify({url: 'http://google.com'})
},
function(error, data) {
	if (error) {
		console.error(error);	
	}
	console.log(data);
});