brotherton-erpnext/erpnext/www/book_appointment/verify/index.py

import frappe
from frappe.utils.verified_command import verify_request


@frappe.whitelist(allow_guest=True)
def get_context(context):
	if not verify_request():
		context.success = False
		return context

	email = frappe.form_dict['email']
	appointment_name = frappe.form_dict['appointment']

	if email and appointment_name:
		appointment = frappe.get_doc('Appointment',appointment_name)
		appointment.set_verified(email)
		context.success = True
		return context
	else:
		context.success = False
		return context