WeasyPrint AWS Lambda

WARNING Native lambda layer can run only legacy WeasyPrint v52, as a workaround you can run your lambda function as a docker container.

Native Lambda Layer

Build layer:

$ make build/weasyprint-layer-python3.8.zip

# to test your build run
$ make test.weasyprint

Deploy layer:

$ aws lambda publish-layer-version \
    --region <region> \
    --layer-name <name> \
    --zip-file fileb://build/weasyprint-layer-python3.8.zip

Environment variables expected by layer:

GDK_PIXBUF_MODULE_FILE="/opt/lib/loaders.cache"
FONTCONFIG_PATH="/opt/fonts"
XDG_DATA_DIRS="/opt/lib"

For python3.9 use instructions: kotify#10 (comment)

Build layer:

$ cd weasyprint
$ make build

Test layer:

$ make run

# in another terminal
$ make test
# result saved in report.pdf

Simple lambda function provided, it requires BUCKET=<bucket name> env variable if files stored on s3.

Example payload to print pdf from url and return link to s3:

{"url": "https://kotify.github.io/cloud-print-utils/samples/report/", "filename": "report.pdf"}

Example paylod to print pdf from html and css data and return pdf content encoded in base64:

{"html": "<html><h1>Header</h1></html>", "css": "h1 { color: red }", "filename": "report.pdf", "return": "base64"}