Hi,

Please see the answer given for this question: https://www.odoo.com/forum/help-1/question/how-to-print-report-from-website-121485

@http.route('/school/card', methods=['POST', 'GET'], csrf=False, type='http', auth="user", website=True)
def print_id(self, **kw):
    student_id = kw['stud_id']
    if student_id:
        pdf = request.env['report'].sudo().get_pdf([student_id], 'module_name.report_name', data=None)
        pdfhttpheaders = [('Content-Type', 'application/pdf'), ('Content-Length', len(pdf))]
        return request.make_response(pdf, headers=pdfhttpheaders)
    else:
        return request.redirect('/')

@http.route(['/shop/print'], type='http', auth="public", website=True, sitemap=False)
def print_saleorder(self, **kwargs):
    sale_order_id = request.session.get('sale_last_order_id')
    if sale_order_id:
        pdf, _ = request.env.ref('sale.action_report_saleorder').sudo().render_qweb_pdf([sale_order_id])
        pdfhttpheaders = [('Content-Type', 'application/pdf'), ('Content-Length', u'%s' % len(pdf))]
        return request.make_response(pdf, headers=pdfhttpheaders)
    else:
        return request.redirect('/shop')

Api to get pdf file preview:

@http.route(['/schedule_pdf'], type='http', auth="public", website=True, sitemap=False)
def schedule_pdf(self, **kw):         
​if kw.get('id'):      
​ ​as_model = request.env['alwathba.schedule'].sudo().browse([int(kw.get('id'))])
​         content = base64.b64decode(str(as_model.pdf_file.decode("utf-8")))     
​ ​pdfhttpheaders = [('Content-Type', 'application/pdf'),('Content-Length', u'%s' % len(content))]      
​ ​return request.make_response(content, headers=pdfhttpheaders) 



to access pdf: https://yourcompany.com/schedule_pdf?id=14