Generate PDFs in Go

Prerequisites

• A PDFDesignAPI account and API token.
• A template UUID with a schema and at least one data binding.
• Trusted server-side code where the token remains secret.

Generate and save the PDF

payload := strings.NewReader(
    `{"data":{"customer":{"name":"Example BV"}}}`)
req, err := http.NewRequestWithContext(ctx, http.MethodPost,
    "https://pdfdesignapi.com/api/v1/generate/single/"+templateUUID,
    payload)
if err != nil { return err }

req.Header.Set("Authorization", "Bearer "+apiToken)
req.Header.Set("Content-Type", "application/json")
res, err := httpClient.Do(req)
if err != nil { return err }
defer res.Body.Close()

if res.StatusCode < 200 || res.StatusCode >= 300 {
    body, _ := io.ReadAll(io.LimitReader(res.Body, 1<<20))
    return fmt.Errorf("PDF generation failed: %s: %s", res.Status, body)
}

file, err := os.Create("document.pdf")
if err != nil { return err }
defer file.Close()
_, err = io.Copy(file, res.Body)
return err

Production notes

• Use an http.Client with explicit timeouts and reuse it across requests.
• Limit error-body reads before logging a redacted response.
• Propagate request cancellation through the context.