splat is simple aws lambda function that takes HTML/CSS/JS, invokes PrinceXML to render it and returns the resulting PDF in one of many ways.
It is intended to be a DIY docraptor of sorts.
Simply build the docker image, deploy it to AWS, then invoke the lambda with an event body JSON that performs the desired operation. For example: {"document_content": "<h1>Hello, World!</h1>"}
This can be done via a function_url, apigateway or lambda invoke.
Event payload body.
| Field | Type | Description |
|---|---|---|
| javascript (princexml) | boolean (False) | Enables princeXML's javascript execution. This will not render react but can be used for formatting. |
| check_license | boolean (False) | Send this field to receive a check on remaining license usage |
| document_content | string | Embed the html content in the payload. There will be AWS payload size limitations. |
| document_url | url | Fetch the html content from document_url to disk before rendering. |
| browser_url | url | Browser the browser_url with playwright before rendering with renderer |
| browser_headers | Mapping[str,str] | Add additional headers to playwright before visiting browser_url |
| browser_pdf_options | Mapping[str,str] | Add additional options to playwright .pdf() call |
| renderer | princexml or playwright |
Renderer to render the html with |
| bucket_name | string | Output the resulting pdf to s3://{bucket_name}/{uuid}.pdf. The lambda will require permission to upload to the bucket. The response will include bucket, key, presigned_url |
| presigned_url | url | Output the resulting pdf to the presigned url. Generate the presigned url with put_object. See Output for more information. |
Pass content in event: {"document_content": "<h1>Hello, World!</h1>"}
Pass content via URL: {"document_url": "https://some_page/report.html"}
Pass content via Browser page: {"browser_url": "https://some_react_page/", "renderer": "princexml", "browser_headers": {"Authorization": "Bearer SOME_BEARER_TOKEN"}}
Returns PDF base64 encoded by default.
To save to an s3 bucket (lambda requires permission): {"bucket_name": "<BUCKET>"}
To save to a presigned url: {"presigned_url": "<URL>"}
splat will attempt to install a PrinceXML license file by default. Just drop your license.dat in the root directory before you build the docker container. The licence file is gitignored for your convenience.
If you do not have a licence file, Prince will watermark your PDFs, and you can only use them non-commercially. See their license page for more information.
You can check the status of the licence by invoking the lambda with the {"check_license": true} option, and interpreting the response, you can use this to periodically check the status of the licence and raise an alert if it's about to expire, and to verify that your new licence has updated correctly.
splat will add any fonts inside a fonts.zip file. Ensure the zip file contains a folder called fonts with all fonts inside. Simply drop into the root directory and build the docker container. The fonts.zip file is gitignored for your convenience. By default, prince comes with a small suite of liberation fonts.
Splat can be used via the uptick_splat library. Install with pip install uptick_splat.
Usage:
from uptick_splat import configure_splat, pdf_with_splat
configure_splat(
function_region="ap-southeast-2",
function_name="splat",
default_bucket_name="your-bucket-to-upload-html-to",
)
some_html = "<h1>test</h1>"
pdf_with_splat(some_html, bucket_name="test_bucket")
# or
pdf_with_splat(some_html)Install mise task runner.
mise run install # booststrap the project and install requirements
mise run test # run tests
mise run format # format