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display-html-lambda

a lambda function to fetch an HTML file uploaded to the Discord CDN and display it on the web - example

Setting up and deploying the Lambda function

Start by running yarn to install all dependencies.

Create a Serverless account & AWS provider

  1. Create a Serverless account -- note the username you provide, its the name of your org.
  2. Go to org on the side bar then providers.
  3. Click add then create a Simple provider. Put in any name you'd like then click Connect AWS provider.
  4. You'll then be redirect to AWS. Click the acknowledgement at the bottom then Create.

Download and log into the serverless cli app

  1. Download the CLI app with your favorite package manager. I do yarn global add serverless
  2. Run serverless login.

Edit serverless.yml

Edit the org field in serverless.yml to what org reads on the Serverless dashboard (this is the same value as your username, likely).

Deploy

Run serverless deploy or ./deploy.sh to deploy the service. It may fail on the first attempt with the error Error: Application not found.. Just run serverless deploy again and it will deploy properly.

Using the API

The output of serverless deploy outputs the execute endpoint URL. It will look similar to api-id.execute-api.region.amazonaws.com. All you have to do then is attach the uri query paramater which has the value of that Discord CDN-Uploaded HTML file.

Example:

https://foobar.execute-api.us-east-1.amazonaws.com/production?uri=https://cdn.discordapp.com/attachments/581635926757998613/866081381456805919/display-html-lambda.html