C#•2mo ago

How can i detect a new e-mail arrival using GraphClientServer

I'm using Microsoft's outlook service through their graph library Microsoft.Graph. I make a login request in an API and they send a security code to my company's email I got stuck in the part of fetching my mailbox trying to find the security code e-mail. Is there a common way of doing it? I was thinking about requesting the mail count in the inbox and loop wait until something happens. I looked through the docs and didn't find anything about an event-like thing

using (var timeout = Task.Delay(TimeSpan.FromMinutes(TIMEOUT_MAIL_WAIT_m)))
{
    while (timeout.IsCompleted is false)
    {
        string filter = $"receivedDateTime ge {DateTime.UtcNow:yyyy-MM-ddTHH:mm:ssZ} and from/emailAddress/address eq '{emailAddress}'";
        var messages = await graphClient.Users[config.UserMailAddress].MailFolders.Inbox.Messages.Request().Filter(filter).GetAsync();

        foreach (var message in messages)
        {
            Console.WriteLine($"From: {message.From.EmailAddress.Address}, Subject: {message.Subject}");
        }

        if (Task.WhenAny(Task.Delay(TimeSpan.FromMinutes(1)), timeout) == timeout)
        {
            throw new TimeoutException("damn");
        }

    }
}

using (var timeout = Task.Delay(TimeSpan.FromMinutes(TIMEOUT_MAIL_WAIT_m)))
{
    while (timeout.IsCompleted is false)
    {
        string filter = $"receivedDateTime ge {DateTime.UtcNow:yyyy-MM-ddTHH:mm:ssZ} and from/emailAddress/address eq '{emailAddress}'";
        var messages = await graphClient.Users[config.UserMailAddress].MailFolders.Inbox.Messages.Request().Filter(filter).GetAsync();

        foreach (var message in messages)
        {
            Console.WriteLine($"From: {message.From.EmailAddress.Address}, Subject: {message.Subject}");
        }

        if (Task.WhenAny(Task.Delay(TimeSpan.FromMinutes(1)), timeout) == timeout)
        {
            throw new TimeoutException("damn");
        }

    }
}

3 Replies

João Paulo•2mo ago

the security code e-mail generally takes 1 minute to arrive

SpReeD•2mo ago

I don't know about Microsoft.Graph, but every mail has an unique id; you could crossechck by this id.

João Paulo•2mo ago

current working solution is as follows

const int TIMEOUT_MAIL_WAIT_m = 8;
const int ANTIDDOS_LAG_ms = 2900;

using var timeout_cts = new CancellationTokenSource();
using var timeout = Task.Delay(TimeSpan.FromMinutes(TIMEOUT_MAIL_WAIT_m), timeout_cts.Token);

string query = $"ReceivedDateTime gt {DateTime.UtcNow:yyyy-MM-ddTHH:mm:ssZ} and from/emailAddress/address eq '{emailAddress}'";
var messageRepository = graphClient.Users[config.UserMailAddress].MailFolders.Inbox.Messages;

while (timeout.IsCompleted is false)
{
    var msg = await messageRepository.Request().Filter(query).GetAsync();
    if (msg.Count is not 0)
    {
        Console.WriteLine("Message detected");
        // TODO: write logic to the captured message right here

        timeout_cts.Cancel();
        break;
    }

    if (Task.WhenAny(Task.Delay(TimeSpan.FromMinutes(1)), timeout) == timeout) break;
    Thread.Sleep(ANTIDDOS_LAG_ms);
}

if (timeout.IsCompleted && timeout.IsCanceled is false)
{
    // TODO: better exception message, mail not received whitin time limit frame
    throw new TimeoutException("damn");
}

const int TIMEOUT_MAIL_WAIT_m = 8;
const int ANTIDDOS_LAG_ms = 2900;

using var timeout_cts = new CancellationTokenSource();
using var timeout = Task.Delay(TimeSpan.FromMinutes(TIMEOUT_MAIL_WAIT_m), timeout_cts.Token);

string query = $"ReceivedDateTime gt {DateTime.UtcNow:yyyy-MM-ddTHH:mm:ssZ} and from/emailAddress/address eq '{emailAddress}'";
var messageRepository = graphClient.Users[config.UserMailAddress].MailFolders.Inbox.Messages;

while (timeout.IsCompleted is false)
{
    var msg = await messageRepository.Request().Filter(query).GetAsync();
    if (msg.Count is not 0)
    {
        Console.WriteLine("Message detected");
        // TODO: write logic to the captured message right here

        timeout_cts.Cancel();
        break;
    }

    if (Task.WhenAny(Task.Delay(TimeSpan.FromMinutes(1)), timeout) == timeout) break;
    Thread.Sleep(ANTIDDOS_LAG_ms);
}

if (timeout.IsCompleted && timeout.IsCanceled is false)
{
    // TODO: better exception message, mail not received whitin time limit frame
    throw new TimeoutException("damn");
}

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How can i detect a new e-mail arrival using GraphClientServer