Headless PDF Generator From HTML Template

Prerequisites

• go1.19
• wkhtmltopdf

How to Use

## build binary
$ go build -o pdfgen .

## run the binary
$ ./pdfgen -t <path_to_html_template_folder> -o <path_to_pdf_output> --data <json_string>

Dynamic Template

Template can be provided as *.html files in a folder and supports dynamic data injection.

Template engine used is Go's built-in html/template, so syntax to use it can be read in their docs.

Be sure to wrap each *.html files with template definition ({{ define "<name>" }}) so it can be rendered.

Advanced Header and Footer

For full customized header and footer, simply provide separate header.html and footer.html inside the folder that's being passed.

Dynamic Data

Data can be passed with the --data flag as a JSON string, and can contain anything as long as it's a valid JSON format.

Pass the data as an array, so a single template can be used to generate a multiple-page file.

Debug Mode

Optional --debug flag can be passed to print out rendered HTML to stdout.

Examples

Check out two examples for both basic usage and a more advance one inside the examples folder.

Use the template with these parameters to see how they work.

Basic Example

$ ./pdfgen -t ./examples/templates/basic -o ./examples/pdf/basic.pdf --data '[{ "title": "PDF Generator from HTML", "isActive": true, "list": ["one", "two"] }]'

Advanced Example

$ ./pdfgen -t ./examples/templates/advanced -o ./examples/pdf/advanced.pdf --data '[{"seller":"Evermos","invoice_no":"6006-1583374588","purchase_date":"13 Desember 2022","buyer":"Kristika Kadarsih","items":[{"name":"XL Xtra Kuota Combo 40gb","descriptions":["Nomor: 087730815702","Serial Number: 22112017482267"],"qty":1,"unit_price":"Rp98.000","total_price":"Rp98.000"},{"name":"XL Xtra Kuota Combo 10gb","descriptions":["Nomor: 087730815702","Serial Number: 22112017482267"],"qty":2,"unit_price":"Rp18.000","total_price":"Rp36.000"}],"subtotal":"Rp134.000","total_items":"Rp134.000","admin_fee":"Rp5.000","discount":"-Rp20.000","total":"Rp119.000","status":"paid","published_date":"13 Desember 2022 14:22 WIB"},{"seller":"Evermos","invoice_no":"6006-1583374588","purchase_date":"13 Desember 2022","buyer":"Kristika Kadarsih","items":[{"name":"XL Xtra Kuota Combo 10gb","descriptions":["Nomor: 087730815702","Serial Number: 22112017482267"],"qty":1,"unit_price":"Rp98.000","total_price":"Rp98.000"}],"subtotal":"Rp98.000","total_items":"Rp98.000","admin_fee":"Rp5.000","discount":"-Rp20.000","total":"Rp83.000","status":"refund","published_date":"13 Desember 2022 14:22 WIB"}]'

References

Read more about the usage of the syntax used for the HTML files in their respective docs:

• wkhtmltopdf
• html/template
• text/template