function_app.py

import azure.functions as func
import logging
import pdfkit
import tempfile
import os

app = func.FunctionApp(http_auth_level=func.AuthLevel.FUNCTION)

# Path to the wkhtmltopdf binary
WKHTMLTOPDF_PATH = os.path.join(os.getcwd(), 'wkhtmltopdf', 'wkhtmltopdf')

@app.route(route="dpcpdfmerger")
def dpcpdfmerger(req: func.HttpRequest) -> func.HttpResponse:
    logging.info('Python HTTP trigger function processed a request.')

    try:
        req_body = req.get_json()
    except ValueError:
        return func.HttpResponse(
            "Invalid JSON body.",
            status_code=400
        )

    html_content = req_body.get('html')
    if not html_content:
        return func.HttpResponse(
            "Please provide HTML content in the request body.",
            status_code=400
        )

    try:
        # Configure pdfkit to use the local wkhtmltopdf binary
        config = pdfkit.configuration(wkhtmltopdf=WKHTMLTOPDF_PATH)

        # Create a temporary file to store the PDF
        with tempfile.NamedTemporaryFile(delete=False, suffix=".pdf") as temp_pdf:
            pdfkit.from_string(html_content, temp_pdf.name, configuration=config)
            temp_pdf.seek(0)
            pdf_data = temp_pdf.read()

        return func.HttpResponse(
            pdf_data,
            mimetype='application/pdf',
            headers={
                'Content-Disposition': 'attachment; filename="output.pdf"'
            }
        )
    except Exception as e:
        logging.error(f"Error converting HTML to PDF: {e}")
        return func.HttpResponse(
            "An error occurred while converting HTML to PDF.",
            status_code=500
        )