public static async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Function, "post", Route = null)] HttpRequest req,
ILogger log)
{
var parser = new WebhookParser();
var inboundEmail = parser.ParseInboundEmailWebhook(req.Body);
log.LogInformation($"EmailForward received new email from {inboundEmail.From.Email}");
double score = 0.0;
if (!string.IsNullOrEmpty(inboundEmail.SpamScore))
{
score = double.Parse(inboundEmail.SpamScore);
if (score >= 5.0)
{
log.LogInformation($"Discarding email due to spam score of {score}");
return(new OkObjectResult("EmailForward discarded email due to spam!"));
}
}
string response = await ForwardEmail(inboundEmail, score, log);
if (string.IsNullOrEmpty(response))
{
log.LogError($"EmailForward FAILED");
return(new OkObjectResult("EmailForward failed to send email!"));
}
log.LogInformation($"EmailForward successfully forwarded email {response}");
return(new OkObjectResult($"EmailForward successfully forwarded email {response}"));
}
public async Task <IActionResult> Email()
{
var parser = new WebhookParser();
InboundEmail inboundEmail = parser.ParseInboundEmailWebhook(Request.Body);
await _messageSink.ProcessMessageAsync(CreateMessage(inboundEmail));
return(Ok());
}
public void RawPayloadWithAttachments()
{
var parser = new WebhookParser();
using (Stream stream = new MemoryStream())
{
using (var fileStream = File.OpenRead("InboudEmailTestData/raw_data.txt"))
{
fileStream.CopyTo(stream);
}
stream.Position = 0;
InboundEmail inboundEmail = parser.ParseInboundEmailWebhook(stream);
inboundEmail.ShouldNotBeNull();
inboundEmail.Dkim.ShouldBe("{@sendgrid.com : pass}");
var rawEmailTestData = File.ReadAllText("InboudEmailTestData/raw_email.txt");
inboundEmail.RawEmail.Trim().ShouldBe(rawEmailTestData);
inboundEmail.To[0].Email.ShouldBe("*****@*****.**");
inboundEmail.To[0].Name.ShouldBe(string.Empty);
inboundEmail.Cc.Length.ShouldBe(0);
inboundEmail.From.Email.ShouldBe("*****@*****.**");
inboundEmail.From.Name.ShouldBe("Example User");
inboundEmail.SenderIp.ShouldBe("0.0.0.0");
inboundEmail.SpamReport.ShouldBeNull();
inboundEmail.Envelope.From.ShouldBe("*****@*****.**");
inboundEmail.Envelope.To.Length.ShouldBe(1);
inboundEmail.Envelope.To.ShouldContain("*****@*****.**");
inboundEmail.Subject.ShouldBe("Raw Payload");
inboundEmail.SpamScore.ShouldBeNull();
inboundEmail.Charsets.Except(new[]
{
new KeyValuePair <string, Encoding>("to", Encoding.UTF8),
new KeyValuePair <string, Encoding>("subject", Encoding.UTF8),
new KeyValuePair <string, Encoding>("from", Encoding.UTF8)
}).Count().ShouldBe(0);
inboundEmail.Spf.ShouldBe("pass");
}
}
public void InboundEmail()
{
// Arrange
using (var stream = new MemoryStream())
{
using (var writer = new StreamWriter(stream))
{
writer.Write(INBOUND_EMAIL_WEBHOOK);
writer.Flush();
stream.Position = 0;
// Act
var parser = new WebhookParser();
var inboundEmail = parser.ParseInboundEmailWebhook(stream);
// Assert
inboundEmail.Attachments.ShouldNotBeNull();
inboundEmail.Attachments.Length.ShouldBe(0);
inboundEmail.Cc.ShouldNotBeNull();
inboundEmail.Cc.Length.ShouldBe(0);
inboundEmail.Charsets.ShouldNotBeNull();
inboundEmail.Charsets.Length.ShouldBe(5);
inboundEmail.Dkim.ShouldBe("{@hotmail.com : pass}");
inboundEmail.From.ShouldNotBeNull();
inboundEmail.From.Email.ShouldBe("*****@*****.**");
inboundEmail.From.Name.ShouldBe("Bob Smith");
inboundEmail.Headers.ShouldNotBeNull();
inboundEmail.Headers.Length.ShouldBe(40);
inboundEmail.Html.ShouldStartWith("<html", Case.Insensitive);
inboundEmail.SenderIp.ShouldBe("10.43.24.23");
inboundEmail.SpamReport.ShouldBeNull();
inboundEmail.SpamScore.ShouldBeNull();
inboundEmail.Spf.ShouldBe("softfail");
inboundEmail.Subject.ShouldBe("Test #1");
inboundEmail.Text.ShouldBe("Test #1\r\n");
inboundEmail.To.ShouldNotBeNull();
inboundEmail.To.Length.ShouldBe(1);
inboundEmail.To[0].Email.ShouldBe("*****@*****.**");
inboundEmail.To[0].Name.ShouldBe("Test Recipient");
}
}
}
public void InboundEmail_with_unusual_encoding()
{
// Arrange
var parser = new WebhookParser();
using (var stream = GetStream(INBOUND_EMAIL_UNUSUAL_ENCODING_WEBHOOK))
{
// Act
var inboundEmail = parser.ParseInboundEmailWebhook(stream);
// Assert
inboundEmail.Charsets.ShouldNotBeNull();
inboundEmail.Charsets.Except(new[]
{
new KeyValuePair <string, Encoding>("to", Encoding.UTF8),
new KeyValuePair <string, Encoding>("subject", Encoding.UTF8),
new KeyValuePair <string, Encoding>("from", Encoding.UTF8),
new KeyValuePair <string, Encoding>("html", Encoding.ASCII),
new KeyValuePair <string, Encoding>("text", Encoding.UTF8) // The original encoding is iso-8859-10 but we fallback on UTF-8
}).Count().ShouldBe(0);
inboundEmail.Text.ShouldBe("Hello SendGrid!\r\n");
}
}
public Task <InboundEmail> ParseInboundEmailWebhook(Stream requestBody)
{
var inboundEmail = _parser.ParseInboundEmailWebhook(requestBody);
return(Task.FromResult(inboundEmail));
}
public async Task <APIGatewayHttpApiV2ProxyResponse> InboundParse(APIGatewayHttpApiV2ProxyRequest request, ILambdaContext context)
{
APIGatewayHttpApiV2ProxyResponse response;
var getParameterResponse = await _ssmClient.GetParameterAsync(new GetParameterRequest
{
Name = AuthenticationKeyParameterName,
WithDecryption = true
});
var authenticationKey = getParameterResponse?.Parameter?.Value;
string authenticationKeyPresented = null;
request.QueryStringParameters?.TryGetValue(AuthenticationQueryParameterKey, out authenticationKeyPresented);
if (string.IsNullOrEmpty(authenticationKeyPresented) || string.IsNullOrEmpty(authenticationKey) ||
authenticationKeyPresented != authenticationKey)
{
context.Logger.LogLine($"Failed to authenticate.");
return(new APIGatewayHttpApiV2ProxyResponse
{
StatusCode = (int)HttpStatusCode.Unauthorized
});
}
try
{
context.Logger.LogLine("Request Headers:");
foreach (var header in request.Headers)
{
context.Logger.LogLine($"{header.Key}: {header.Value}");
}
context.Logger.LogLine($"Request IsBase64Encoded:\n{request.IsBase64Encoded}");
context.Logger.LogLine($"Request Body:\n{request.Body}");
var requestBody = new MemoryStream(Convert.FromBase64String(request.Body));
var parser = new WebhookParser();
var inboundEmail = parser.ParseInboundEmailWebhook(requestBody);
context.Logger.LogLine($"InboundEmail Subject:\n{inboundEmail.Subject}");
context.Logger.LogLine($"InboundEmail To:\n{inboundEmail.To[0].Email}");
context.Logger.LogLine($"InboundEmail From:\n{inboundEmail.From.Email}");
context.Logger.LogLine($"InboundEmail DKIM:\n{inboundEmail.Dkim}");
context.Logger.LogLine($"InboundEmail SPF:\n{inboundEmail.Spf}");
context.Logger.LogLine($"InboundEmail Envelope.From:\n{inboundEmail.Envelope.From}");
response = new APIGatewayHttpApiV2ProxyResponse
{
StatusCode = (int)HttpStatusCode.OK,
Body = "Success",
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
}
};
}
catch (Exception ex)
{
var exception = ex.ToString();
context.Logger.LogLine($"Exception occurred:\n{exception}");
response = new APIGatewayHttpApiV2ProxyResponse
{
StatusCode = (int)HttpStatusCode.OK,
Body = ex.Message,
Headers = new Dictionary <string, string> {
{ "Content-Type", "text/plain" }
}
};
}
return(response);
}