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| Original file line number | Diff line number | Diff line change |
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| @@ -1,74 +1,35 @@ | ||
| # AWS Lambda to print pdfs | ||
| # Cloud Print Utils | ||
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| ## WeasyPrint | ||
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| [WeasyPrint](https://weasyprint.org/) is python based pdf/png print service. | ||
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| ### Lambda Layer | ||
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| To build a layer you need **docker** installed on your system. | ||
| This layer supports only amazon linux 2 runtimes. | ||
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| Build layer: | ||
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| $ make build/weasyprint-layer-python3.8.zip | ||
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| # for future runtimes, eg: python3.9 | ||
| # RUNTIME=python3.9 make build/weasyprint-layer-python3.9.zip | ||
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| # to test your build run | ||
| $ make test.weasyprint | ||
| This is a collection of AWS Lambda layers and functions to render pdf documents | ||
| and images from HTML. | ||
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| Deploy layer (see below for full stack deployment): | ||
| Currently solutions based on these tools available: | ||
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| $ aws lambda publish-layer-version \ | ||
| --region <region> \ | ||
| --layer-name <name> \ | ||
| --zip-file fileb://build/weasyprint-layer-python3.8.zip | ||
| - [WeasyPrint](https://weasyprint.org/) | ||
| - [wkhtmltopdf](https://wkhtmltopdf.org/) | ||
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| Environment variables expected by layer: | ||
| To build a layer you need **make** and **docker** installed on your system. | ||
| The layers support only amazon linux 2 runtimes, eg. python3.8, nodejs12.x. | ||
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| GDK_PIXBUF_MODULE_FILE="/opt/lib/loaders.cache" | ||
| FONTCONFIG_PATH="/opt/fonts" | ||
| XDG_DATA_DIRS="/opt/lib" | ||
| By default only minimal subset of system fonts [installed](fonts/layer_builder.sh) if you need more fonts | ||
| set `EXTRA_FONTS` env variable with space separated list | ||
| of font packages to install, eg: | ||
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| ### Lambda Function | ||
| EXTRA_FONTS="liberation-fonts xorg-x11-fonts-cyrillic" make build/weasyprint-layer-python3.8.zip | ||
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| Simple lambda function [provided](weasyprint/lambda_function.py), it requires `BUCKET=<bucket name>` env variable if files stored on s3. | ||
| You can search for available font packages with `make fonts.list`. | ||
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| Example payload to print pdf from url and return link to s3: | ||
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| {"url": "https://weasyprint.org/samples/report/report.html", "filename": "report.pdf"} | ||
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| Example paylod to print png from html and css data and return png content encoded in base64: | ||
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| {"html": "<html><h1>Header</h1></html>", "css": ["h1 { color: red }"], "filename": "report.png", "return": "base64"} | ||
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| ### CloudFormatin Deployment | ||
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| **WARNING** review [code](cdk-stacks/lib/weasyprint-stack.ts) before deployment. | ||
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| Stack includes: printer lambda function and s3 bucket where files are stored. | ||
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| We use [CDK](https://docs.aws.amazon.com/cdk/latest/guide/home.html) to deploy stack, thus you need nodejs installed to run it: | ||
| ## WeasyPrint | ||
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| # build | ||
| $ cd cdk-stacks && npm install && npm run build | ||
| # view diff | ||
| $ cdk diff --stack WeasyPrintStack --parameters uploadBucketName=<bucket name> | ||
| # deploy | ||
| $ cdk deploy --stack WeasyPrintStack --parameters uploadBucketName=<bucket name> | ||
| [WeasyPrint](https://weasyprint.org/) is python based pdf/png print service. | ||
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| To test your deployment: | ||
| Run `make build/weasyprint-layer-python3.8.zip` to build a layer, for details | ||
| see related [readme](weasyprint/README.md). | ||
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| # invoke function | ||
| $ aws lambda invoke --function-name weasyprint-print \ | ||
| --payload '{"url": "https://weasyprint.org/samples/report/report.html", "filename": "report.pdf"}' \ | ||
| --log-type Tail --query 'LogResult' --output text out | base64 -d | ||
| ## wkhtmltopdf | ||
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| # view output | ||
| $ cat out | ||
| {"statusCode": 200, "body": "https://your-bucket.s3.amazonaws.com/report.pdf?signature..."} | ||
| [wkhtmltopdf](https://wkhtmltopdf.org/) is a comand line tool that renders HTML | ||
| into PDF and various image formats using the Qt WebKit rendering engine. | ||
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| # open in browser | ||
| $ chromium-browser $(cat out | jq .body | tr -d '"') | ||
| Run `make build/wkhtmltox-layer.zip` to build a layer, for details | ||
| see related [readme](wkhtmltox/README.md). |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,13 +1,37 @@ | ||
| # Example CDK Stack | ||
| # Infrastructure as Code example | ||
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| This is an example app that you can use to deploy aws stacks. | ||
| Stack defined in `lib/`, app defined in `bin/`. | ||
| We use [CDK](https://docs.aws.amazon.com/cdk/latest/guide/home.html) to deploy stack, thus you need nodejs installed to run it. | ||
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| ## Useful commands | ||
| Each stack consist of printer lambda function, layer and s3 bucket where files are stored. | ||
| You must build layer before running deploy. | ||
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| - `npm run build` compile typescript to js | ||
| - `npm run watch` watch for changes and compile | ||
| - `npm run test` perform the jest unit tests | ||
| - `cdk deploy` deploy this stack to your default AWS account/region | ||
| - `cdk diff` compare deployed stack with current state | ||
| - `cdk synth` emits the synthesized CloudFormation template | ||
| We provide two stacks `WeasyPrintStack` and `WkhtmltoxStack`, below is deployment | ||
| example of WeasyPrintStack. | ||
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| **WARNING** review code before deployment. | ||
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| # build (rebuild must be done on every change in typescript files) | ||
| $ cd cdk-stacks && npm install && npm run build | ||
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| # view diff WeasyPrintStack | ||
| $ npm run cdk diff WeasyPrintStack | ||
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| # deploy WeasyPrintStack | ||
| $ npm run cdk deploy WeasyPrintStack --parameters uploadBucketName=<bucket name> | ||
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| # generate synthesized CloudFormation template | ||
| $ npm run cdk synth WeasyPrintStack | ||
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| To test your deployment: | ||
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| # invoke function | ||
| $ aws lambda invoke --function-name cloud-print \ | ||
| --payload '{"url": "https://weasyprint.org/samples/report/report.html", "filename": "report.pdf"}' \ | ||
| --log-type Tail --query 'LogResult' --output text out | base64 -d | ||
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| # view output | ||
| $ cat out | ||
| {"statusCode": 200, "body": "https://your-bucket.s3.amazonaws.com/report.pdf?signature..."} | ||
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| # open in browser | ||
| $ chromium-browser $(cat out | jq .body | tr -d '"') |
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