This is an AWS Lambda function that converts HTML pages to PDF documents using wkhtmltopdf (0.12.4), it implements a simple interface to read and HTML input and output PDF content.
WARNING: You must use v2.x.x tag if you are using Node.js runtime >=10.x in AWS Lambda.
Input event to this function has the following structure:
{
"html": "<!DOCTYPE html><html><head><title>HTML doc</title></head><body>Content<body></html>"
}
It yields a response in the following format:
{
"data": "JVBERi0xLjQKMSAwIG9iago8PAovVGl0bGUgKP7..."
}
data is base64 encoding of the converted PDF file.
pack the function
npm run pack
upload package.zip to aws S3
aws s3 cp package.zip s3://lambda-htm2pdf
then follow this guide to create and deploy API Gateway
Notes: after creating the lambda choose Code Tab then "Upload from" -> Amazon S3 location and specify the location of package.zip, example: https://lambda-htm2pdf.s3.amazonaws.com/package.zip
then goto Configuration Tab select Environment variables and create this
| key | value |
|---|---|
| FONTCONFIG_PATH | /var/task/fonts |
create API key
create UsagePlan
add API stage to UsagePlan
goto resource -> click on method (ANY) click Method Request in settings API Key Required set to true.
re deploy to stage (actions -> api actions -> Deploy)
The function can be tested locally using AWS SAM CLI. You can change contents of events/example-event.json or you can create a new file which you will give sam as an event parameter.
sam local invoke "HtmlToPdf" -e events/example-event.json
There are two ways in which these functions can be deployed to AWS.
1 - Check our npm run deploy:dev and npm run deploy:prod commands in package.json and change it according to your needs. Do not forget to add environment variables (you can find it under template.yml) to your lambda function in aws lambda edit page or running lamba update-function-configuration command.
2 - Check out template.yml file and edit according to your needs then use sam deploy.