PDF watermark API

curl -sS -X POST \
  https://api.pdfconversionapi.com/v2/convert/pdf/to/text-watermark \
  -H "Authorization: Bearer $PDFCONVERSIONAPI_KEY" \
  -F File=@proposal.pdf \
  --form-string Text=DRAFT \
  --form-string 'FontColor=#B03A2E' \
  --form-string Opacity=30 \
  --form-string FileName=proposal.draft.pdf \
  -o response.json

# FileData is base64. Save the first file in converted/,
# or print the JSON error.
if jq -e '.Files' response.json > /dev/null; then
  mkdir -p converted
  name=$(jq -r '.Files[0].FileName' response.json)
  jq -r '.Files[0].FileData' response.json \
    | base64 --decode > "converted/$name"
else
  cat response.json
fi

import base64
import os

import requests

key = os.environ["PDFCONVERSIONAPI_KEY"]
response = requests.post(
    "https://api.pdfconversionapi.com/v2/convert/pdf/to/text-watermark",
    headers={"Authorization": f"Bearer {key}"},
    files=[("File", open("proposal.pdf", "rb"))],
    data={
        "Text": "DRAFT",
        "FontColor": "#B03A2E",
        "Opacity": "30",
        "FileName": "proposal.draft.pdf",
    },
    timeout=180,
)
result = response.json()
if not response.ok:
    raise SystemExit(f"{result['Code']}: {result['Message']}")

os.makedirs("converted", exist_ok=True)
for file in result["Files"]:
    path = os.path.join("converted", file["FileName"])
    with open(path, "wb") as out:
        out.write(base64.b64decode(file["FileData"]))
    print(path, file["FileSize"], "bytes")

import { mkdir, readFile, writeFile } from "node:fs/promises";
import { join } from "node:path";

const form = new FormData();
const file = "proposal.pdf";
form.append("File", new Blob([await readFile(file)]), file);
form.append("Text", "DRAFT");
form.append("FontColor", "#B03A2E");
form.append("Opacity", "30");
form.append("FileName", "proposal.draft.pdf");

const url =
  "https://api.pdfconversionapi.com/v2/convert/pdf/to/text-watermark";
const key = process.env.PDFCONVERSIONAPI_KEY;
const response = await fetch(url, {
  method: "POST",
  headers: { Authorization: `Bearer ${key}` },
  body: form,
});
const result = await response.json();
if (!response.ok) {
  throw new Error(`${result.Code}: ${result.Message}`);
}

await mkdir("converted", { recursive: true });
for (const file of result.Files) {
  const path = join("converted", file.FileName);
  await writeFile(path, Buffer.from(file.FileData, "base64"));
  console.log(path, file.FileSize, "bytes");
}