contact/Pages/Contact.cshtml.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc.RazorPages;
using System.ComponentModel.DataAnnotations;
using Microsoft.AspNetCore.Mvc;
using System.Net.Mail;
using System.Net;
//for captcha:
using System.Net.Http;
using System.Net.Http.Headers;
using Newtonsoft.Json.Linq;
using Microsoft.Extensions.Configuration;

namespace contact.Pages
{
    [BindProperties(SupportsGet = true)]
    public class ContactFormModel
    {
        public ContactFormModel()
        {
            DbId = "n/a v7";
        }
        [Required]
        public string Name { get; set; }
        [Required]
        public string Company { get; set; }
        [BindProperty(SupportsGet = true)]
        public string DbId { get; set; }
        [Required, EmailAddress]
        public string Email { get; set; }
        [Required]
        public string Message { get; set; }

    }

    public class ContactModel : PageModel
    {
        public string Message { get; set; }
        [BindProperty(SupportsGet = true)]
        public ContactFormModel Contact { get; set; }

        private readonly IConfiguration _configuration;
        public ContactModel(IConfiguration configuration)
        {
            _configuration = configuration;
        }

        public ActionResult OnPost()
        {
            if (!ModelState.IsValid)
            {
                return Page();
            }


            if (!ReCaptchaPassed(
                        Request.Form["g-recaptcha-response"], // that's how you get it from the Request object
                        _configuration.GetSection("GoogleReCaptcha:secret").Value
                        ))
            {
                //Return a fail code that will hopefully take us off the spammers list
                return StatusCode(500);
            }



            //fuck those spammers
            //2022-05-06 changes to get rid of jumbo lead magnet spammer but still force him to pay someone to manually enter the stuff
            //ideally it should read from a text file here but this is a quickie fix while Joyce is on important viha phone call
            var blocks = new List<string>();
            blocks.Add("google");
            blocks.Add("jumboleadmagnet");//<--fuck this guy in particular, keeps spamming
            var companyname = Contact.Company.ToLowerInvariant();
            foreach (string s in blocks)
            {
                if (companyname.Contains(s))
                {
                    goto skipspam;
                }
            }

            SendMail();

        skipspam:
            //TODO: go to a successful submit page on the ayanova site            
            //return Redirect("/confirm.html");//sample quickie page I made up
            return Redirect("https://ayanova.com/confirmed.htm");
        }


        private void SendMail()
        {
            var MessageBody = $"Name:\r\n{Contact.Name}\r\n\r\nCompany:\r\n{Contact.Company}\r\n\r\nDatabase Id:\r\n{Contact.DbId}\r\n\r\nMessage:\r\n{Contact.Message}";

            //SEND TO US
            using (var message = new MailMessage())
            {
                message.To.Add(new MailAddress("support@ayanova.com"));
                message.From = new MailAddress(Contact.Email);
                message.Subject = $"Question about AyaNova from {Contact.Company}";
                message.Body = MessageBody;
                using (var smtpClient = new SmtpClient("smtp.fastmail.com"))
                {

                    smtpClient.Host = "smtp.fastmail.com";
                    smtpClient.Port = 587;
                    smtpClient.UseDefaultCredentials = false;
                    //testing
                    smtpClient.EnableSsl=true;
                 
                    // smtpClient.Port=465;
                    // smtpClient.DeliveryMethod= SmtpDeliveryMethod.Network;



                    //NOTE: Do not use the noreply email address to send mail, it crashes the server somehow

                    //******************************************************************************************************************
                    //******************************************************************************************************************
                    //TEST CRASH
                    // smtpClient.Credentials = new System.Net.NetworkCredential("noreply@ayanova.com", "91768700489f8edd28aa71e3e0f4073eba54ce83c4c1a6a910700fa94094ddfd");                    


                    //FASTMAIL CHANGES
                    //Fastmail server names and ports help page: https://www.fastmail.help/hc/en-us/articles/1500000278342
                    //APP Password created in fastmail for smtp use only labelled 'contact-form': cnea8agl6nlx5j7l

//try using from as support@onayanova.com
//try domain version if this still won't work
                    smtpClient.Credentials = new System.Net.NetworkCredential("support@onayanova.com", "cnea8agl6nlx5j7l");
                    //******************************************************************************************************************
                    //******************************************************************************************************************

                    smtpClient.Send(message);
                }
            }

            //SEND COPY TO CLIENT
            using (var message = new MailMessage())
            {
                message.To.Add(new MailAddress(Contact.Email));
                message.From = new MailAddress("support@ayanova.com");
                message.Subject = $"Confirmation that your question about AyaNova has been received from {Contact.Company}";
                message.Body = MessageBody;

                using (var smtpClient = new SmtpClient("smtp.fastmail.com"))
                {

                    smtpClient.Host = "smtp.fastmail.com";
                    smtpClient.Port = 587;
                    smtpClient.UseDefaultCredentials = false;
                    smtpClient.EnableSsl=true;
                    //NOTE: Do not use the noreply email address to send mail, it crashes the server somehow
                    smtpClient.Credentials = new System.Net.NetworkCredential("support@onayanova.com", "cnea8agl6nlx5j7l");
                    smtpClient.Send(message);
                }
            }

        }

        public void OnGet()
        {
            Message = "Your contact page.";
        }



        public static bool ReCaptchaPassed(string gRecaptchaResponse, string secret)
        {
            HttpClient httpClient = new HttpClient();
            var res = httpClient.GetAsync($"https://www.google.com/recaptcha/api/siteverify?secret={secret}&response={gRecaptchaResponse}").Result;
            if (res.StatusCode != HttpStatusCode.OK)
            {
                // logger.LogError("Error while sending request to ReCaptcha");
                return false;
            }

            string JSONres = res.Content.ReadAsStringAsync().Result;
            dynamic JSONdata = JObject.Parse(JSONres);
            if (JSONdata.success != "true")
            {
                return false;
            }

            return true;
        }


    }
}