Sandbox, pages, and inject - spoolpdf

Sandbox

sandbox: true still occupies a concurrency slot and returns a PDF with a SANDBOX watermark. Usage is not incremented. Success includes X-Sandbox: true and omits X-Usage-Count.

{"html": "<h1>Preview</h1>", "sandbox": true}

MCP render_pdf accepts the same field.

Page ranges

Keep ranges with pages (for example 1-3,6). Cannot combine with single_page or {width}xauto.

Inject CSS and JavaScript

css and javascript are inline source or a public http(s) URL (same SSRF rules as url). Inline and remote inject run once before print. lazy_load_images scrolls the page so below-the-fold images fetch.

{
  "html": "<h1>Report</h1>",
  "css": "h1{color:#111}",
  "lazy_load_images": true
}

PDF metadata

{
  "html": "<h1>Invoice</h1>",
  "metadata": {"title": "Invoice", "author": "Acme", "subject": "August", "keywords": "invoice"}
}

Written as PDF XMP Title / Author / Subject / Keywords.

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