protected SubscriptionResult AddSubscriptionToList(string email, RecipientList selectedList)
{
EmailSyntaxValidator validator = new EmailSyntaxValidator(email, false);
if (validator.IsValid)
{
_log.Debug("Attemt to add email subscription for {0}", email);
EmailAddress emailAddress = selectedList.CreateEmailAddress(email);
emailAddress.Source = EmailAddressSource.SelfRegistered;
emailAddress.Added = DateTime.Now;
emailAddress.Save(); // Will add it to the list, or update it if it exists
return SubscriptionResult.Success;
}
else
{
_log.Warning("Failed to add email subscription for '{0}' (not valid)", email);
return SubscriptionResult.EmailNotValid;
}
}
public List<string> ValidateRecipientList(List<EmailAddress> recipientAddresses, RecipientList blocked)
{
_log.Debug("Validating {0} emails using block list {1} ({2})", recipientAddresses.Count, blocked.Name, blocked.Id);
if(recipientAddresses.Count == 0)
return new List<string>();
MailgunSettings settings = GetSettings();
RestClient client = new RestClient();
client.BaseUrl = new Uri("https://api.mailgun.net/v2");
client.Authenticator = new HttpBasicAuthenticator("api", settings.PublicKey);
if (string.IsNullOrEmpty(settings.ProxyAddress) == false)
{
client.Proxy = new WebProxy(settings.ProxyAddress, settings.ProxyPort); // Makes it easy to debug as Fiddler will show us the requests
}
RestRequest request = new RestRequest();
// We're sending a lot of data, which should
// be a post, but Mailgun does not allow that
// request.Method = Method.POST;
request.Resource = "/address/parse";
// Validate strict
request.AddParameter("syntax_only", false);
string addresses = "";
foreach (EmailAddress emailAddress in recipientAddresses)
{
addresses += emailAddress.Email + ",";
}
_log.Debug("Length of address field sent to Mailgun: {0}", addresses.Length);
if(addresses.Length > 8000)
{
throw new ApplicationException("Mailgun only accepts address fields with length of 8000 characters.");
}
request.AddParameter("addresses", addresses.TrimEnd(','));
var response = client.Execute(request);
_log.Debug("Mailgun responded with status: {0} - {1}", (int)response.StatusCode, response.StatusDescription);
if (response.StatusCode == HttpStatusCode.OK)
{
/*
{
"parsed": [
"Alice <*****@*****.**>",
"*****@*****.**"
],
"unparseable": [
"example.com"
]
}
*/
Dictionary<string, List<string>> resultParams = null;
try
{
resultParams = new JsonDeserializer().Deserialize<Dictionary<string, List<string>>>(response);
}
catch (Exception e)
{
_log.Warning("Unable to parse Mailgun response.", e);
}
// Update all recipients with information
if (resultParams != null)
{
List<string> invalidAddresses = resultParams["unparseable"];
foreach (string address in invalidAddresses)
{
EmailAddress emailAddress = recipientAddresses.Find(a => a.Email.Equals(address, StringComparison.InvariantCultureIgnoreCase));
if (emailAddress != null)
{
emailAddress.Comment = "Mailgun reported address as invalid.";
emailAddress.Save();
}
EmailAddress blockedAddress = blocked.CreateEmailAddress(address);
blockedAddress.Comment = "Mailgun reported address as invalid.";
blockedAddress.Save();
}
return invalidAddresses;
}
}
else
{
// Attempt to log error from Mailgun
if(string.IsNullOrEmpty(response.ErrorMessage) == false)
_log.Warning(response.ErrorMessage);
if(string.IsNullOrEmpty(response.Content) == false)
_log.Debug(response.Content);
throw new ApplicationException("Cannot validate email addresses using Mailgun: " + response.ErrorMessage);
}
return null;
}