How to get WKHTMLTOPDF working in flask on Heroku l?

Question

I have created an app with Flask which takes some user inputs, calculates them, and then generates the pdf out of that data.

I have followed this and getting the same error: How to get WKHTMLTOPDF working on Heroku?

Here is my code:

@app.route('/download')
def download():
    credit_hours = aaa['Credit Hours']
    rendered = render_template("report2.html", credit_hours=credit_hours)
    def _get_pdfkit_config():
     if platform.system() == 'Windows':
         return pdfkit.configuration(wkhtmltopdf=os.environ.get('WKHTMLTOPDF_BINARY', 'C:\\Program Files\\wkhtmltopdf\\bin\\wkhtmltopdf.exe'))
     else:
         WKHTMLTOPDF_CMD = subprocess.Popen(['which', os.environ.get('WKHTMLTOPDF_BINARY', 'wkhtmltopdf')], stdout=subprocess.PIPE).communicate()[0].strip()
         return pdfkit.configuration(wkhtmltopdf=WKHTMLTOPDF_CMD)
         
    pdf = pdfkit.from_string(rendered, False, configuration=_get_pdfkit_config())
    response = make_response(pdf)
    response.headers['Content-Type'] = 'application/pdf'
    response.headers['Content-Disposition'] = f'inline; filename={ag_number} GPA Report.pdf'
    
    return response

Requirements.txt:

git+git://github.com/johnfraney/wkhtmltopdf-pack.git
pdfkit==0.6.1

Error, I am getting is "Internal Server Error" on Heroku.

The above code is working perfectly on my local machine. But when I deploy it to heroku I get

Internal Server Error The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.

How to get WKHTMLTOPDF working in flask on Heroku l?

0 Answers0