Event Webhook C# Code Example

Parse Webhook

In this example, we want to parse all emails at address@email.sendgrid.biz and post the parsed email to http://sendgrid.biz/upload

Given this scenario, the following are the parameters you would set at the Parse API settings page:

Hostname: email.sendgrid.biz
URL: http://sendgrid.biz/upload

Put this C# model in your models folder:

/// <summary>
/// A model with the data format of the Inbound Parse API's POST
/// </summary>
public class Email
{
  /// <summary>
  /// The Domain Keys Identified Email code for the email
  /// </summary>
  public string Dkim { get; set; }

  /// <summary>
  /// The email address that the email was sent to
  /// </summary>
  public string To { get; set; }

  /// <summary>
  /// The HTML body of the email
  /// </summary>
  public string Html { get; set; }

  /// <summary>
  /// The email address the email was sent from
  /// </summary>
  public string From { get; set; }

  /// <summary>
  /// The Text body of the email
  /// </summary>
  public string Text { get; set; }

  /// <summary>
  /// The Ip address of the sender of the email
  /// </summary>
  public string SenderIp { get; set; }

  /// <summary>
  /// A JSON string containing the SMTP envelope. This will have 2 variables: to, which is an array of recipients, and from, which is the return path for the message.
  /// </summary>
  public string Envelope { get; set; }

  /// <summary>
  /// Number of attachments included in email
  /// </summary>
  public int Attachments { get; set; }

  /// <summary>
  /// The subject of the email
  /// </summary>
  public string Subject { get; set; }

  /// <summary>
  /// A JSON string containing the character sets of the fields extracted from the message.
  /// </summary>
  public string Charsets { get; set; }

  /// <summary>
  /// The results of the Sender Policy Framework verification of the message sender and receiving IP address.
  /// </summary>
  public string Spf { get; set; }
}

To test this, we send an email to example@example.com, and put the following method in our ApiController. Note: Don't forget the attribute.

// POST api/inbound
[HttpPost]
public async Task<HttpResponseMessage> Post()
{
    var root = HttpContext.Current.Server.MapPath("~/App_Data");
    var provider = new MultipartFormDataStreamProvider(root);
    await Request.Content.ReadAsMultipartAsync(provider);

    var email = new Email
    {
        Dkim = provider.FormData.GetValues("dkim").FirstOrDefault(),
        To = provider.FormData.GetValues("to").FirstOrDefault(),
        Html = provider.FormData.GetValues("html").FirstOrDefault(),
        From = provider.FormData.GetValues("from").FirstOrDefault(),
        Text = provider.FormData.GetValues("text").FirstOrDefault(),
        SenderIp = provider.FormData.GetValues("sender_ip").FirstOrDefault(),
        Envelope = provider.FormData.GetValues("envelope").FirstOrDefault(),
        Attachments = int.Parse(provider.FormData.GetValues("attachments").FirstOrDefault()),
        Subject = provider.FormData.GetValues("subject").FirstOrDefault(),
        Charsets = provider.FormData.GetValues("charsets").FirstOrDefault(),
        Spf = provider.FormData.GetValues("spf").FirstOrDefault()
    };

    // The email is now stored in the email variable

    return new HttpResponseMessage(HttpStatusCode.OK);
}

The above code used the following using's

using System.Linq;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using System.Web;
using System.Web.Http;
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