SendGrid - Webhook

appsettings.json

"SendGrid": {
  "ApiKey": "apikey",
  "SenderEmail": "[email protected]",
  "SenderName": "Blog PROGRAMUJE.NET",
  "TemplateId": "templateid",
  "WebhooksKey": "publickey"
}

ProcessResponse.cs

private async Task<IActionResult> ProcessResponse(Response response)
{
    var responseContent = await response.Body.ReadAsStringAsync();

    if (string.IsNullOrEmpty(responseContent) == false)
    {
        return BadRequest(responseContent);
    }

    var header = response.Headers.FirstOrDefault(h => h.Key == "X-Message-Id");

    var messageId = header.Value?.FirstOrDefault();

    _logger.LogInformation($@"MessageId: {messageId}");

    return Ok(new
    {
        MessageId = messageId
    });
}

SendGridConfig.cs

public class SendGridConfig
{
    public string ApiKey { get; set; }

    public string SenderEmail { get; set; }

    public string SenderName { get; set; }

    public string TemplateId { get; set; }

    public string WebhooksKey { get; set; }
}

SendGridWebhooksController.cs

[Route("api/[controller]")]
[ApiController]
public class SendGridWebhooksController : ControllerBase
{
    private readonly SendGridConfig _config;
    private readonly ILogger<SendGridWebhooksController> _logger;
    public SendGridWebhooksController(IOptions<SendGridConfig> config,
        ILogger<SendGridWebhooksController> logger)
    {
        _logger = logger;
        _config = config.Value;
    }

    [HttpPost]
    [Route("InboundEmail")]
    public async Task<IActionResult> ReceiveInboundEmail()
    {
        try
        {
            var signature = Request.Headers[WebhookParser.SIGNATURE_HEADER_NAME];
            var timestamp = Request.Headers[WebhookParser.TIMESTAMP_HEADER_NAME];

            var parser = new WebhookParser();
            var events = await parser.ParseSignedEventsWebhookAsync(Request.Body, _config.WebhooksKey, signature, timestamp);

            _logger.LogInformation(JsonConvert.SerializeObject(events));

            return Ok();
        }
        catch (SecurityException e)
        {
            return BadRequest();
        }
    }
}