Tweet with Twitter!

Lambda for simply sending a tweet upon post using Netlify's Functions capabilities.

Setup

To begin setup, with a newly cloned repo:

yarn install

To test this locally, run:

yarn serve

Which will start the function available at localhost:9000/tweet

Config

There are a few requirements for getting this to work:

• Generate a shared secret string
• Twitter consumer key
• Twitter consumer secret
• Twitter access token
• Twitter access secret

Env

Create a local .env file with the shared secret. This is used in coordination with JWT to create token containing your Twitter keys that gets posted to this function endpoint.

APP_SECRET="[secret]"

Wherever this is getting deployed, you'll need to set up an environment variable with that name that will populate the process.env when the function is ran. With Netlify, you can set this up as a Build Environment Variable.

Posting to Endpoint

Authorization Header

When posting to the endpoint, you'll need to generate a JWT given the same APP_SECRET as above. The contents of the JWT before signed should look like:

{
  twitter_consumer_key: [key],
  twitter_consumer_secret: [key],
  twitter_access_token_key: [key],
  twitter_access_token_secret: [key],
}

Pass this as an Authorization header

Content

The body of the post should look like the following:

{
  "description": "[text of tweet]",
  "link": "[tweet link appended to status]",
  "image": "[tweet image (optional)]",
}